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All 81 posts   Subject: Translations of Articles Wanted   Please login to post   Down

 
    Rhodium
(Chief Bee)
03-24-02 13:08
No 287299
User Picture  		      Translations of Articles Wanted     

I don't think there is any immediate need for the translation of JP44-009892, as it isn't a really preferable method - bromine and alpha-methylstyrene giving a 50:50 mixture of P2P and 2-phenylpropionaldehyde (which in turn are inseparable by distilling). Chem. Abs. 71, 61016x (1969) found in Post 243048 (Rhodium: "P2P from alpha-methylstyrene", Novel Discourse) is enough for anyone venturing into that synthesis.

Yes, please post the translation of JP44-010776 you gave me. I was saving it for a Master FAQ on all known synthetic routes to MDP2P, but with my current productivity rate, you better post them in this forum (in a separate thread), preferably with a little commentary on its origin from https://www.rhodium.ws/chemistry/tcboe/chapter5.html and other things you can think of. 		 
 
 
 
    PolytheneSam
(Master Searcher)
03-24-02 14:37
No 287308
User Picture  		      http://www.berksci.com/     

How about this?  http://www.berksci.com/
Or would you be satisfied with a Japanese speaking non-chemist reading it to a non-Japanese speaking chemist?
http://www.geocities.com/dritte123/PSPF.html
ad terra incognita per ars artis gratia 		 
 
 
 
    foxy2
(Distinctive Doe)
03-24-02 14:58
No 287310
User Picture  		      Yes     

We need to send the recruiters out and get us a good Japanese bee chemist.  They have published tons of stuff and there are lots of patents.  The big problem is that we have no CHEAP way to translate this stuff. frown
Those who give up essential liberties for temporary safety deserve neither liberty nor safety 		 
 
 
 
    terbium
(Old P2P Cook)
03-24-02 17:20
No 287332
User Picture  		      Double blind.     

Or would you be satisfied with a Japanese speaking non-chemist reading it to a non-Japanese speaking chemist?

I could provide the same. It would be amusing to do a parallel translation this way and see if the two translations were at all recognizeable as being of the same source. 		 
 
 
 
    Rhodium
(Chief Bee)
03-24-02 18:28
No 287347
User Picture  		      Japanese     

I'm satisfied as long as I can discern the experimental part, and perhaps a brief review of the reaction mechanism and references.

Sam: What you provided me last time was excellent. Clear synthetic details, and an overview of what they say in the rest of the patent. 		 
 
 
 
    PolytheneSam
(Master Searcher)
03-24-02 21:48
No 287379
User Picture  		      JPs     

About JP44-009892, I told you that example 1 was the same as the CA abstract.  Did you still need translations for the rest of the examples?  How about if I post the translations of the examples from JP44-010776 that I gave you?
http://www.geocities.com/dritte123/PSPF.html
ad terra incognita per ars artis gratia 		 
 
 
 
    Rhodium
(Chief Bee)
03-25-02 23:03
No 287795
User Picture  		      Japanese     

I don't think there is any immediate need for the translation of JP44-009892, as it isn't a really preferable method - bromine and alpha-methylstyrene giving a 50:50 mixture of P2P and 2-phenylpropionaldehyde (which in turn are inseparable by distilling). Chem. Abs. 71, 61016x (1969) found in Post 243048 (Rhodium: "P2P from alpha-methylstyrene", Novel Discourse) is enough for anyone venturing into that synthesis.

Yes, please post the translation of JP44-010776 you gave me. I was saving it for a Master FAQ on all known synthetic routes to MDP2P, but with my current productivity rate, you better post them in this forum (in a separate thread), preferably with a little commentary on its origin from https://www.rhodium.ws/chemistry/tcboe/chapter5.html and other things you can think of.

Another article that should be translated from japanese is Yakugaku Zasshi 77, 310 (1957), which is the only to the Hive known reference where a phenylacetone is reductively aminated with nitromethane and aluminum amalgam in situ, instead of using methylamine as usual.

https://www.rhodium.ws/projects/translations/yakugakuzasshi1.jpg
https://www.rhodium.ws/projects/translations/yakugakuzasshi2.jpg 		 
 
 
 
    UTFSE
(Hive Bee)
03-31-02 20:57
No 290469
User Picture  		      japanese to whatever     

this will do it up to 150 words but moi does not know how to import the proper Japnese symbols into the page for the deed. So someguru type dude ----- do it.

http://babelfish.altavista.com/

((NOTE: this is all too obvious so I guess I am toast but I meant well))
OTEECEE & meeeee!!!! 		 
 
 
 
    UTFSE
(Hive Bee)
03-31-02 21:05
No 290472
User Picture  		      mo for yo     

If you could import a ocr of a graphic into babel maybe this would work
I don't know how babel views graphics. I am getting aheadache thijnking about the convulutions that might be required to spin.

aka goodluck.
OTEECEE & meeeee!!!! 		 
 
 
 
    Rhodium
(Chief Bee)
04-03-02 22:04
No 291984
User Picture  		      Dealkylation of vanillin derivatives     

UTFSE: Babelfish does not handle graphics.

Polythenesam: Here is a project that should be of very high importance: Post 291982 (moo: "I happened to run into the Japanese patent ...", Novel Discourse)

If that could be applied to eugenol... 		 
 
 
 
    SPISSHAK
(Stranger)
05-12-02 04:00
No 307603
User Picture  		      document translation.     

I mentioned this is the general forum, but you might want to check out this pen that scans documents. They sell at fryes electronics.
It`s 200 dollars and it works in 35 different languages.
You can also download updates and dictonaries from thier website www.wizcom.com I think.
Pretty neat stuff! 		 
 
 
 
    alchemy_bee
(Hive Bee)
05-17-02 01:39
No 309684
User Picture  		      Just breathing some new life into this, the hive ...     

Just breathing some new life into this, the hive would appreciate anyone who could translate these docs.

[url=https://www.rhodium.ws/projects/translations/yakugakuzasshi1.jpg]

[url=https://www.rhodium.ws/projects/translations/yakugakuzasshi2.jpg]
Can a bee be visa vis its entity when half a bee philosophically must ipso facto half not be? 		 
 
 
 
    6079_Smith_W_II
(Stranger)
08-27-02 08:16
No 349568
       Yakugaku Zasshi 77, 310 (1957) experimental
(Rated as: excellent) 		    

Greetings from Room 101; it's good to see this forum still exists after these several years.

There was a character in the 2nd part I couldn't find, marked by ?.

--------

Experimental from Yakugaku Zasshi 77, 310 (1957):

1-(2-Methoxyphenyl)-2-propanone(II) Into 52g anethole dissolved in 400cc glacial acetic acid was added little by little while stirring 200g Pb3O4. During this time the warmth of the liquid was held to 40 degrees requiring approximately 2 hours. After the addition was complete stirring was continued for a further 1 hour at 40 degrees.

Next, a small quantity of water was added so that the excess Pb(OAc)4 dissolved, and the large portion of acetic acid removed under vacuum, then the remaining residual sediment extracted with ether. When nothing further could be extracted into the ether solvent, the residual sediment with 500cc of 20% sulfuric acid was boiled up for 3 hours with strong stirring. Cooled resultant's upper layer of oil was extracted with ether. Dried with calcium chloride, distilled, slightly yellow clear liquid, bp(14) 125-130 degrees. Yield 24g (42%). Semicarbazone: mp 157-159°C. In addition, a mixture of this semicarbazone with that previously yielded by Heinzelman's process melted without melting point depression.

N,alpha-Dimethyl-2-methoxyphenethylamine(I) Into 30g aluminum amalgam immersed in 500cc ethanol was dripped, while stirring, a solution of 32.8g (II) and 19g nitromethane dissolved in 100cc ethanol. A violent reaction was produced, still it was refluxed for an additional 2-3 hours heated above a water bath. Upon cooling, generations of formed aluminum hydroxide were next ? separated, ? liquid was removed [from the separated Al solids] by washing it with ethanol, the result acidified with hydrochloric acid and nonpolar byproducts as well as powder reactants removed by ether extraction; if this particular resultant is made strongly alkaline with caustic soda [NaOH] (I) becomes isolated from this by ether extraction; the obtained ether solution was dried with caustic Kalium [KOH], the ether removed and [remaining mixture] distilled to completion. Colorless clear liquid, bp15 130-133degrees. Yield 29g (80%).

Hydrochloride: white granular crystals (recrystallized from isopropanol, acetone 1:5 mixture) mp 129-130 degrees. In addition, a mixture of this product with that previously yielded by the technique of both Woodruff and Heinzelman melted without melting point depression.

--------
BTW if anyone wants to look for that mystery kanji character, it was a two-radical character, on the left rad85(water) and on the right rad63(door).  The only refs I found to it were as a variant of another kanji which was only used in a place name for a river in China.
--------

DISCLAIMER: This translator's knowledge of Japanese is mainly focused on language useful in picking up and fucking japanese girls. As aforementioned translator has not to date been greatly successful in picking up and fucking aforementioned japanese girls, one may rightly deduce that the overall quality of the aforementioned translator's Japanese skills are still not  fantastic. Although the attempt was made in good faith to accurately convey the contents of the original document, the aforementioned translator cannot be held responsible for any use or misuse of aforementioned translation due to aforementioned error in aforementioned translation (aforementioned). 		 
 
 
 
    Mountain_Girl
(Hive Bee)
08-27-02 10:59
No 349588
       Welcome back Smith.     

Thanks for the effort. May Room 101 be visited by many japanese girls.

Upon cooling, generations of
formed aluminum hydroxide were next ? separated, ? liquid was removed [from
the separated Al solids] with ethanol


I assume this means that the formed Al hydroxide was filtered and washed with fresh EtOH which was added to the rest of the EtOH from the reaction.

 
 
 
 
    6079_Smith_W_II
(Stranger)
08-27-02 21:03
No 349773
       yes, it seems to be pretty much standard workup     

Yes, it seems to be they are washing the Al sludge with EtOH as per normal e.g. Shulgin 109 etc etc (except Sasha used MeOH of course, minor point).  The wording is just strange.

BTW if anyone wants to look for that mystery kanji character, it was a two-radical character, on the left rad85(water) and on the right rad63(door).  The only refs I found to it were as a variant of another kanji which was only used in a place name for a river in China.

I'm working on JP10-265428 now, it's more modern writing style and full of kana (easier) but it's much much longer, so no ETA. 		 
 
 
 
    6079_Smith_W_II
(Stranger)
10-10-02 07:21
No 366771
       Patent JP-H07-149750 - From bromobenzene to P2P
(Rated as: excellent) 		    

Patent JP-H07-149750 - From bromobenzene to P2P (https://www.rhodium.ws/archive/jp-h07-149750.gif)

<0048> With commercial 2-bromotoluene(10.7g, 63mmol), magnesium ribbon(2.25g, 94mmol), and diethyl ether(60mL), a 2-methylphenylmagnesium bromide-diethyl ether solution was prepared via the usual method; under argon gas stream, and cooled to -78 degrees C, propylene oxide(8.75mL, 7.25g, 13mmol) was slowly dripped into this.  With continuous stirring, the reaction liquid temperature was allowed to raise over 1.5 hours to room temperature.  After, saturated aqueous ammonium chloride solution was added to stop the reaction, and it was poured into water(300mL); this was then extracted with diethyl ether(200mL x3).  After this was done, the organic layer was washed with saturated aqueous sodium chloride(300mL), and dried over anhydrous sodium sulfate, using a water bath regulated so as not to exceed 25 degrees C.  Crude 1-(2-methylphenyl)propan-2-ol was obtained by concentration under vaccum.  A solution of this was made by dilution with acetone(300mL), then ice-cold Jones Reagent(2.67M, 23.4mL, 63mmol) was dripped in over 10 minutes; the solution was kept at this temperature for a further 30 minutes with periodic stirring.  Next, 2-propanol(5.0mL) was added to eliminate excess reagent, and after a minute, neutralized with sodium bicarbonate, then the reaction liquid suction filtered through celite so any solids are really removed.  The filtered liquid was then concentrated under vacuum using a water bath regulated so as not to exceed 25 degrees C, then again diluted with diethyl ether(300mL).  This was washed in turn with water(300mL), then saturated aqueous sodium chloride(300mL), further dried with anhydrous sodium sulfate, then concentrated under vacuum using a water bath regulated so as not to exceed 25 degrees C.  Residue was purified using silica gel column chromatography.  The collected fraction, eluted in diethyl ether-hexane(10:90), was then concentrated under vacuum using a water bath regulated so as not to exceed 25 degrees C, and (2-methylphenyl)propan-2-one thereby obtained in the form of an oily material (5.50g, 59%).
 
<0049> IR(film): 3020, 2920, 1710, 1490, 1460, 1350, 1220, 1150, 740cm^(-11).  H-NMR(200MHz in CDCl3): delta 2.14(3H,s,C3CH3), 2.25(3H,s,ArCH3), 3.71(2H,s,C1H2), 7.08-7.23(4H,aromatic ring proton). EIMS (relative strength %): 148(40,M+), 105(100,M-MeCO+), 43(62,MeCO+).  EI-HIMS:(C10H12O) calculated value 148.0888 actual value m/z 148.0865  <0050> reference example 9 <0051>

             -----------

Usual caveats about translator skill (or lack thereof) apply.  In particular, the part where the sat. ammonia is added may be after the reaction stops rather than to stop the reaction, not exactly sure.  Also it could be the entire system is 'ice-cold' for the Jones reagent addition, rather than just the JR.   My apologies to the Japanese for my continuing massacre of their exquisite language. 		 
 
 
 
    Rhodium
(Chief Bee)
10-10-02 09:04
No 366811
User Picture  		      Aromatic thiophenols (essential 2C-T precursors)     

This one is needed for data on how to produce aromatic thiophenols (essential 2C-T precursors) in an easy fashion from aryl halides. The URL at the bottom has been corrected since last time this was posted.

Patent Number: JP 63203632 (1988)

Abstract

PURPOSE: To obtain the titled compound which is an intermediate for agricultural chemicals, medicine, dye, etc., in good yield, by reacting a halide compound with thiourea in the presence of an aliphatic carboxylic acid or anhydride thereof in the reaction system and treating the reaction product with an alkaline substance.

CONSTITUTION:A halide compound (e.g. 2-chloro-3-trifluoromethyl pyridine, etc.) expressed by the formula R-X (R is alkyl, benzyl, aromatic heterocycls having 5-6 members) is reacted with thiourea in the presence of an aliphatic carboxylic acid (e.g. acetic acid, etc.) or acid anhydride thereof (preferably having 50-200wt.% based on the halide compound) and the reaction product is treated with an alkaline substance to provide the aimed thiol compound (2-mercapto-3-trifluoromethylpyridine, etc.). No offensive odor is caused during reaction treatment, but also reaction yield is greatly improved.

https://www.rhodium.ws/projects/translation/japanese/JP63203632.pdf
Alcohol, an unconsciousness-expanding drug 		 
 
 
 
    6079_Smith_W_II
(Humble Japanese Interpreter)
10-21-02 15:24
No 370851
       JP63-203632
(Rated as: excellent) 		    

...I've been having a bit of trouble with this one -- the scan quality of the document is not very good in either of the versions I have, there are some complicated (to me) run-on sentences, whine whine excuses etc etc... mainly the problem is I still _suck_ at Japanese. 

  Here's the meat of the patent, the experimental part... I'll tackle the rest of it in a bit, as it does look interesting.

 ------

Patent JP63203632, 1988-08-23
Inventors: TSUJII YASUHIRO; UENISHI HISAYOSHI, KIMURA TOKIYA
Applicant: ISHIHARA SANGYO KAISHA LTD
Application:JP19870035316 19870218
IPC: C 07 B 45/06; C 07 D 213/70

(Skipping summary description, theory stuff for now ...)


Example of Execution 1
  181.5g 2-chloro-3-trifluoromethylpyridine and 114g thiourea were dissolved in 91g acetic acid, and reacted at 90 degrees C for 1 hour.
  After the end of this reaction, and after the reaction mixture cooled, 600ml of 20% sodium hydroxide solution was thrown in; next the aqueous layer was washed with methylene chloride and afterwards the pH of the solution was adjusted to 6-7 with hydrochloric acid; the formed crystals were separated, washed, and dried, to obtain 166g 2-mercapto-3-triflouromethylpyridine (yield 92.7%).  Furthermore, in this reaction process bad odors were not generated.

Comparison example
  A reaction was performed in a similar manner to Example of Execution 1 above with the exeptions that the 91g of acetic acid was replaced with 1l of ethanol, the reaction temperature was 80 instead of 90 degrees C, and the reaction time was 26 hours instead of 1 hour.  98.9g of the target compound was obtained (yield 55%) upon completion of this halide compound and thiourea reaction.  Also, in this reaction process a bad odor was generated.


Examples of Execution 2-15
  These were performed in the manner of Example of Execution 1, with the raw materials used shown in the following Table 1-1, and the reaction conditions shown in Table 1-2; results are shown in Table 1-2.

  
	
Table 1-1
+-------+------------------------------------------------------------------------------+
|       |                               raw materials                                  |
|Example+-------------------------------------------+------------------------+---------+
|  of   |           halide substance                |specific carboxylic acid| thiourea| 
| Exec. +----------------------------------+--------+------------------------+---------+  
|  No.  |            type                  | qty(g) |  type          | qty(g)|  qty(g) |
+-------+----------------------------------+--------+----------------+-------+---------+
|   2   |2-chloro-5-trifluoromethylpyridine|   200  |  acetic acid   |  100  |   167   |
+-------+----------------------------------+--------+----------------+-------+---------+
|   3   |2-chloro-3-trifluoromethylpyridine|   363  |50% acetic acid |  360  |   228   |
|       |                                  |        |  aqueous soln. |       |         |
+-------+----------------------------------+--------+----------------+-------+---------+
|   4   |2-fluoro-3-trifluoromethylpyridine|  16.5  |  acetic acid   |   16  |   15.2  |
+-------+----------------------------------+--------+----------------+-------+---------+
|   5   |2-bromo-3-methylpyridine          |  17.2  |       "        |    8  |   15.2  |
+-------+----------------------------------+--------+----------------+-------+---------+
|   6   |2-chloro-5-hydroxycarbonylpyridine|    10  |       "        |   10  |   7.8   |
+-------+----------------------------------+--------+----------------+-------+---------+
|   7   |2-chloro-5-aminocarbonylpyridine  |   5.0  |       "        |   10  |   4.9   |
+-------+----------------------------------+--------+----------------+-------+---------+
|   8   |2-chloro-5-cyanopyridine          |   4.0  |       "        |    4  |   4.4   |
+-------+----------------------------------+--------+----------------+-------+---------+
|   9   |2-chloro-5-nitropyridine          |  10.0  |       "        |    5  |   9.6   |
+-------+----------------------------------+--------+----------------+-------+---------+
|   10  |2,3,5-trichloropyridine           |  36.5  |       "        |   18  |   22.8  |
+-------+----------------------------------+--------+----------------+-------+---------+
|   11  |2-bromopyridine                   |  10.0  |       "        |    5  |   9.6   |
+-------+----------------------------------+--------+----------------+-------+---------+
|   12  |5-bromo-2-chloropyridine          |  10.0  |       "        |   10  |   7.7   |
+-------+----------------------------------+--------+----------------+-------+---------+
|   13  |5-bromo-3-methylene thiazole      |   3.0  |       "        |   10  |   2.6   |
+-------+----------------------------------+--------+----------------+-------+---------+
|   14  |benzylbromide                     |   4.5  |       "        |    5  |   4.4   |
+-------+----------------------------------+--------+----------------+-------+---------+
|   15  |2-bromothiazole                   |   6.0  |       "        |    6  |   5.6   |
+-------+----------------------------------+--------+----------------+-------+---------+



Table 1-2
+-------+------------------+-----------------------+------------------------------------------+
|       |reaction condition| _ of alkaline substnce|            goal substance                |
|Example+---------+--------+-----------------------+------------------------------------+-----+
|  of   |reaction |reaction| alkaline substance    |                                    |     |
| Exec. |  temp.  |  time  +----------------+------+                                    |yield|  
|  No.  | (deg C) |  (hrs) | type           |qty(g)|        type                        | (%) |
+-------+---------+--------+----------------+------+------------------------------------+-----+  
|   2   |  70-80  |  1.3   |sodium hydroxide|  174 |2-mercapto-5-trifluoromethylpyridine| 88.3|
+-------+---------+--------+----------------+------+------------------------------------+-----+
|   3   |  95-100 |   1    |       "        |  310 |2-mercapto-3-trifluoromethylpyridine| 94.3|
+-------+---------+--------+----------------+------+------------------------------------+-----+
|   4   |   110   |   6    |       "        |   14 |               "                    |  59 |
+-------+---------+--------+----------------+------+------------------------------------+-----+
|   5   |    95   |   1    |       "        |   15 |2-mercapto-3-methylpyridine         | 53.6|
+-------+---------+--------+----------------+------+------------------------------------+-----+
|   6   |     "   |   "    |       "        |   20 |2-mercapto-5-hydroxycarbonylpyridine| 83.3|
+-------+---------+--------+----------------+------+------------------------------------+-----+
|   7   |     "   |  0.3   |       "        |   10 |2-mercapto-5-aminocarbonylpyridine  | 91.6|
+-------+---------+--------+----------------+------+------------------------------------+-----+
|   8   |    85   |   2    |       "        |    5 |2-mercapto-5-cyanopyridine          | 94.1|
+-------+---------+--------+----------------+------+------------------------------------+-----+
|   9   |    90   |  0.5   |       "        |   10 |2-mercapto-5-nitropyridine          |  90 |
+-------+---------+--------+----------------+------+------------------------------------+-----+
|   10  |   100   |   2    |       "        |   30 |2-mercapto-3,5-dichloropyridine     | 73.3|
+-------+---------+--------+----------------+------+------------------------------------+-----+
|   11  |    70   |   "    |       "        |  9.5 |2-mercapto-pyridine                 |  95 |
+-------+---------+--------+----------------+------+------------------------------------+-----+
|   12  |    80   |  0.3   |       "        |    8 |5-bromo-2-mercaptopyridine          |  98 |
+-------+---------+--------+----------------+------+------------------------------------+-----+
|   13  |    75   |   2    |       "        |    8 |3-methyl-5-mercaptoisothiazole      |  96 |
+-------+---------+--------+----------------+------+------------------------------------+-----+
|   14  |    80   |   1    |       "        |    3 |benzylthio alcohol                  |  92 |
+-------+---------+--------+----------------+------+------------------------------------+-----+
|   15  |     "   |  0.5   |       "        |    7 |2-mercaptothiazole                  |  95 |
+-------+---------+--------+----------------+------+------------------------------------+-----+



  Similarly with the exception of the halide substance, from for example 2-bromopyrazine,  3-bromopyridazine, 4-bromo-1-methylimidazole, 2-bromo oxazole, 5-bromo-4-nitro-isoxazole, 5-bromo-1-methyl-4-nitropyrazole, 3-bromo-1,2,4-triazole, and 2-bromotriazine, used in the reaction of Examples of Execution 1-15 above, 2-mercaptopyrazine, 3-mercaptopyridazine, 4-mercapto-1-methyl-imidazole, 2-mercapto oxazole, 5-mercapto-4-nitroisoxazole, 5-mercapto-1-methyl-4-nitropyrazole, 3-mercapto-1,2,4-triazole, and 2-mercaptotriazine would be obtained.


{Invention conclusion....)


  ------
Standard disclaimer re:translation accuracy applies.

 
 
 
 
    6079_Smith_W_II
(Humble Japanese Interpreter)
10-21-02 15:30
No 370853
       sorry about the tables     

Looked OK in the preview... I'll try something different next time. 		 
 
 
 
    cHiLLy
(Stranger)
11-14-02 06:14
No 379539
User Picture  		      russian     

Post 345932 (zara: "Реальные синтезы !", Russian HyperLab)Post 346626 (zara: "И еще синтезов !", Russian HyperLab)
Heres a few good posts in the hyperlab that perhaps some bees would like to take a look at. The online translators ive used turn up lots of confusing points in russian text.
Thanks 		 
 
 
 
    Chimimanie
(Newbee)
12-26-02 01:20
No 392850
User Picture  		      4-OH indole synth in japanese     

http://l2.espacenet.com/dips/viewer?PN=JP9169725&CY=gb&LG=en&DB=EPD

or

https://www.rhodium.ws/projects/translation/japanese/jp-a-h09-169725.pdf

Thank you! 		 
 
 
 
    Chimimanie
(Newbee)
01-16-03 23:57
No 398865
User Picture  		      quinone road german articles     

They are  two ref in german I would like to known in english; first is about chloroethyl BQ intermediate and second is about 5-oh indol synthesis from a common intermediate with this road

First: (liebigs ann chem bd 763 p 145)
2-(1-chlor-äthyl)-1,4-benzochinon(26) - Zu einer Lösung von 2.16 g (20 mMol) Benzochinon und 4.32 g (40.'mMol) alpha-Chlor-propionsaure in 40 ml Wasser und 20 ml CCl4 wurden bei 50-53° unter kräftigem Rühren gleichzeitig innerhalb 20 Min. 5 g (22 mMol) Ammoniumperoxydisulfat in 2o ml. Wasser und 3.4 g (20 mMol) Silbernitrat in 20ml Wasser gegeben. Nach weiterem 5 min. Rühren wurden noch 100 ml CCI4 zugefügt. DIe Phasen wurden getrennt und die wässrige Phase mit 50 ml CCI4 extrahiert. Die vereinigten organischen Phasen wurden mjt einer Aufschlämmung von 20 g Calciumcarbonat in 100 ml Wasser gewaschen. Nach Filtrieren, Trennen der Phasen, Trocknen (MgSO4) und Eindampfen wurden 2,14 g eines Produkts erhalten. das laut NMR-Analyse etwa 1.53 g (45 %) 26 und 0.61 g nicht umgesetztes Benzochinon enthielt. Das Benzochinon wurde bei 20°/0.5 Torr durch Sublimation entfernt und der Rückstand bei 50-60°/0.5 Torr destilliert. 26 bildet gelbe Kristalle vom Schmp. 54-56°, reagiert mit Wasser sowie Alkohol und ist lichtempfindlich. Es ist deshalb..... (dont have the next paper)

second: (ref unknown)

5-hydroxy-6-methyl-indol(9a)

Das Amin 3a (2-(2,5-dibenzyloxy-4-methyl-phenyl)-ethylamin) wurde in THF gelöst, unter Zusatz von Pd/C hydriert (AAV 4) und dann nach AAV 5 oxidiert oder 10h im offenen Gefäss bei RT gerührt. Nach Abziehen des Lösungsmittels und Kristallisation mit Ether erhält man 9a. Ausb. 70-80%.

AAV 4:
Hydrierung: Der Benzylether wird in THF gelöst und mit Pd/C (10%) versetzt. Es wird bei RT und 1-4 atm. in einer Wasserstoffatmosphäre bis zur Beendigung der H2-Aufnahme geschüttelt. Das nach der Aufarbeitung unter Argon zurückbleibende Öl wird mit Ether zur Kristallisation gebracht.

AAV 5:
Oxidation: Unter Argon werden 0.01 mol des Hydrochinon-Derivates in Aceton gelöst, mit 0.0001 mol DDQ versetzt und 24h bei RT unter Ar gerührt. Das Lösungsmittel wird abgezogen und der Rückstand mit Petrolether/Ether behandelt.

thank you german speaking bees! 		 
 
 
 
    PolytheneSam
(Master Searcher)
01-17-03 01:40
No 398890
User Picture  		      Bitte übersetzen Sie sich für uns     

quinone route German articles

German isn't my natural language so maybe someone can check it (Osmium?) (for Post 398865 (Chimimanie: "quinone road german articles", Novel Discourse) )

First one:
Liebig's Annalen Der Chemie bd (band?) 763 p 145
2-(1-chloro-ethyl)-1,4-benzoquinone (26) - To a solution of 2.16 g (20 mMol) benzoquinone and 4.32 g (40 mMol?) alpha-chloro-propionic acid in 40 ml water and 20 ml CCl4 at 50-53° under vigorous (strong) stirring within 20 minutes 5 g. (22 mMol) ammonium peroxydisulfate (bisulfate?) in 20 ml water and 3.4 g. (20 mMol) silver nitrate were added simultaneously.  After stirring another 5 minutes 100 ml CCl4 was then added.  The phases were seperated and the aqueous phase was extracted with CCl4.  The combined organic phases were washed with a suspension of 20 g calcium carbonate in 100 ml water.  After filtering, separation of the phases, drying (MgSO4) and evaporation 2.14 g of the product was obtained.  The results of NMR analysis showed that it contained about 1.53 g (45%) 26 and 0.61 g unreacted benzoquinone.  The benzoquinone was removed at 20°/0.5 Torr by sublimation and the residue was distilled at 50-60°/0.5 Torr.  26 forms yellow crystals with a melting point of  54-56°, reacts with water, somewhat with alcohol and is photosensitive.  It is therefore....

second: (ref unknown)

5-hydroxy-6-methyl-indol(9a)

The amine 3a (2-(2,5-dibenzyloxy-4-methyl-phenyl)-ethylamine) was dissolved in THF, under addition of (in the presence of?) Pd/C hydrogenated (AAV 4) and then after AAV 5 oxidized or 10h (10 hours?) stirred in an open aparatus at RT (room temperature?).  After drawing off the solvent medium and crystallisation with ether one obtains 9a.  Yield 70-80%.

AAV 4:
Hydrogenation:  The benzyl ether was dissolved in THF and spiked with Pd/C (10%).  It was shaken at RT and 1-4 atm. in a hydrogen atmosphere until H2 uptake ceases.  Then after the workup under argon the oil was crystalized with ether.

AAV 5:
Oxidation:  Under argon 0.01 mol of hydroquinone derivative was dissolved in acetone, with 0.0004 mol DDQ added and stirred 24h (?) at RT under Ar.  The solvent medium was drawn off and the residue was treated with petroleum ether/ether.

Edit: "DDQ amount conflict" /mindlib
http://www.geocities.com/dritte123/PSPF.html
The hardest thing to explain is the obvious 		 
 
 
 
    Chimimanie
(Newbee)
01-19-03 11:35
No 399661
User Picture  		      thank you polythene sam     

good work, thank you 		 
 
 
 
    Rhodium
(Chief Bee)
01-19-03 19:33
No 399740
User Picture  		      MDP2P synthesis via performic/peracetic acid etc     

"Relative affinity of tolyl and piperonyl radicals by direct but indirect comparison with various substituted aryl radicals"

Very boring and uninspiring title, and this also in French. But - this is one of the pioneer research papers regarding the peracid oxidation of isosafrole, where isosafrole glycol, its esters, isosafrole epoxide and MDP2P is discussed in-depth, covering almost 16 pages! The only thing that needs to be done now is to translate it to a readable language... wink

Bull. Soc. Chim. Fr. [4] 49,1738-53 (1931) (https://www.rhodium.ws/djvu/tiffenau.djvu)

Also, there is https://www.rhodium.ws/pdf/benzodioxole.deriviatives.pdf on a related subject, but I believe Hypo already has begun working on it... 		 
 
 
 
    GC_MS
(Hive Bee)
01-19-03 20:03
No 399743
User Picture  		      If you supply me with the correct link and...     

If you supply me with the correct link and give me about a week time, I'll try my best wink. Hypo is doing the other one already.
Ave Hive, synthetisandi te salutant! 		 
 
 
 
    Rhodium
(Chief Bee)
01-19-03 21:07
No 399747
User Picture  		      Fixed     

Oops, I forgot to actually upload it... crazy Now it's accessible. 		 
 
 
 
    Rhodium
(Chief Bee)
03-09-03 18:19
No 415062
User Picture  		      German translation: L-PAC synthesis     

The articles on L-Phenyl acetyl carbinol (L-PAC) below has been requested by GC_MS and retrieved/scanned by Uemura, they are however still in German, and Antoncho has expressed a wish to have the important experimental parts translated either to English or Russian:

Biochemische Zeitschrift 115, pp 282 (1921) (https://www.rhodium.ws/pdf/l-pac.neuberg-2.pdf)
Biochemische Zeitschrift 128, pp 610 (1922) (https://www.rhodium.ws/pdf/l-pac.neuberg-1.pdf)

Another gernam article in need of translation can be found in Post 411744 (Rhodium: "New P2P syntheses from industrial chemicals", Novel Discourse) 		 
 
 
 
    Rhodium
(Chief Bee)
03-09-03 23:54
No 415195
User Picture  		      Italian translation needed     

The following articles on chemical manipulations of safrole and related compounds would be very nice if someone could translate into english.

https://www.rhodium.ws/projects/translation/italian/safroleglycol1.djvu
https://www.rhodium.ws/projects/translation/italian/safroleglycol2.djvu

Browser plugin to read *.djvu files: http://www.lizardtech.com/download/ 		 
 
 
 
    Rhodium
(Chief Bee)
03-27-03 00:56
No 421565
User Picture  		      Chinese Translation needed     

Synthesis of 3,4-methylenedioxyphenyl-2-propanone
Jingxi Huagong, 18(6), 321-324 (2001) (https://www.rhodium.ws/projects/translation/chinese/mdp2p-chinese.pdf)

Abstract
A process for the prepn. of (3,4-methylenedioxyphenyl)-2-propanone was studied by means of epoxidn. of safrole and subsequent catalytic isomerization of the so-obtained epoxide. (3,4-Methylenedioxyphenyl)-2-propanone is a useful intermediate for the synthesis of methyldopa, an important antihypertensive agent. The optimal result was obtained by expts. done under various conditions, such as kind of catalyst, consumption of catalyst and reaction time.
 
The yield of epoxidn. achieved 92% at n(catalyst):n(safrole) = 0.0039, n(catalyst):n(H2O2) = 0.0046, n(H2O2):n(safrole) = 0.87, reaction time 4 h, reaction temp. 356-358K and with 1,2-dichloroethane as solvent. The yield of isomerization achieved 91% at n(LiI):n(crude product) = 0.045, reaction time 6 h, reaction temp. 351-353 K, with Et acetate as solvent and LiI as catalyst. Purity of the title compd. was over 95%.
____ ___ __ _

Preparation And Some Reactions Of 2,5-Dibromobenzaldehyde
J. Nanjing Univ. 27(1), 191-194 (1991) (https://www.rhodium.ws/projects/translation/chinese/25-dmba-chinese.pdf)

Abstract
Bromination of benzaldehyde with Br2 in HOAc in the presence of FeCl3 gave 60-70% 2,5-dibromobenzaldehyde (1), which was converted to ethyleneacetal (2) and then treated with CH3ONa in DMF containing Cul to give 2,5-dimethoxybenzaldehyde (3) or 2-Methoxy-5-Bromobenzaldehyde (7) according to the reaction conditions. Oxidation of compounds 1, 3, and 7 with H2O2/NaOH produced the corresponding carboxylic acids. The structures have also been confirmed by IR, NMR, and mass spectral data.
____ ___ __ _

Improved synthesis of 3,4,5-trimethoxy-benzaldehyde
Chemical Reagents/Huaxue Shiji 21(1), 50 (1999) (https://www.rhodium.ws/pdf/345-tmba.huaxue.shiji.21.50.1999.pdf) 		 
 
 
 
    Rhodium
(Chief Bee)
04-03-03 01:08
No 423458
User Picture  		      Japanese Translation Wanted     

1-Phenyl-2-Propanones from 1-Phenyl-1-Hydroxy-2-Propanones (https://www.rhodium.ws/projects/translation/japanese/JP-A-S60-222437.pdf)

Abstract

1-Phenyl-2-alkanones I (R = C1-4 alkyl; R1, R2 = H, OH, halo, NH2, C1-4 alkyl, C1-4 alkoxy; R1 and R2 may form a 5- to 7-membered ring contg. 1-2 O atoms), useful as intermediates for pharmaceuticals and agrochem., were prepd. by reducing 1-hydroxy-1-phenyl-2-alkanones II.  Thus, heating 0.10 mol II (R = Me; R1 = 4-OH; R2 = H), 120 mL 5 N HCl, and 25 g powd. Sn 24 h at 80° gave 93 mol% I (R = Me, R1 = 4-OH, R2 = H).
____ ___ __ _

This one is also in japanese: Post 451720 (Rhodium: "Isosafrole to MDP2P by auto-oxidation!", Novel Discourse) 		 
 
 
 
    Chimimanie
(Hive Bee)
04-03-03 09:41
No 423538
User Picture  		      German translation wanted     

Patent DD278600

see Post 421214 (Chimimanie: "This is a patent in german to selectively...", Tryptamine Chemistry)

Can anybee translate the Darlegung des Wesens der Erfindung and the synthesis of 4-OH-DPT from DPT in Ausführungsbeispiele.

and post the translation in the above thread? 		 
 
 
 
    lugh
(Moderator)
04-25-03 21:13
No 429397
       Another German Translation Needed     

Recently, some secondary literature reading found this article:  https://www.rhodium.ws/djvu/aniline.demethylation.djvu which uses aniline hydrochloride as a demethylation catalyst, as is mentioned in Post 229141 (Masquerade: "Re: Cleavage of Alkoxy group to give Phenol", Chemistry Discourse) smile It would probably bee useful to the Hive if the experimental were to bee translated, and possibly the rest of it, depending on what it says wink
Chemistry is our Covalent Bond 		 
 
 
 
    Chimimanie
(Hive Bee)
04-30-03 19:37
No 430454
User Picture  		      Russian translation     

Some very interesting article on 2,5-DMA synthesis from 1,4 DMB:
1,4 DMB -> lithiation,propylene oxyde -> tosylate -> liq ammonia -> 2,5 DMA

see post Post 426579 (Chimimanie: "ref on dimethoxy-alcohols", Russian HyperLab) and post Post 428187 (Flogiston: "Fire in the hole!!!!!", Russian HyperLab) where the russian article is retrieved.

translation is wanted for all the experimental part, since it contain very useful information on the synthesis of this essential DOB precursor.

Thank youlaughwink 		 
 
 
 
    PolytheneSam
(Master Searcher)
05-23-03 03:43
No 434879
User Picture  		      Can someone translate this into English?     

Can someone translate this into English?

1> 3 Zhurnal
2. 2 Zhurnal analiticheskoi khimii
3. 1 Zhurnal epidemiologii i mikrobiologii
4. 1 Zhurnal evoliutsionnoi biokhimii i fiziologii.
5. 1 Zhurnal evoliutsionnoi biokhimii i fiziologii
6. 1 Zhurnal Evrofish
7. 1 Zhurnal. Fizicheskii otdiel
8. 2 Zhurnal fizicheskoi khimii
9. 1 Zhurnal khimicheskoi promyshlennosti
10. 2 Zhurnal mikrobiologii, epidemiologii i immunobiologii
11. 1 Zhurnal mikrobiologii, fatalogii i infektsionnykh boleznei
12. 1 Zhurnal neorganicheskoi khimii
13. 1 Zhurnal obshchei biologii
14. 2 Zhurnal obshchei khimii
15. 1 Zhurnal organicheskoi khimii

1. 2 Zhurnal organicheskoi khimii
2.+ 2 Zhurnal organicheskoi khimii.
3.# 2 Zhurnal organicheskoi khimii. English
4. 1 Zhurnal organicheskoi khimii. English. Journal of organic
chemistry of the USSR
5. 1 Zhurnal organicheskoi khimii. English. Russian journal of
organic chemistry
6. 1 Zhurnal po sel'skokhoziaistvennym naukam
7. 1 Zhurnal prikladnoi khimii
8.+ 1 Zhurnal prikladnoi khimii (Leningrad, R.S.F.S.R.)
9. 2 Zhurnal prikladnoi khimii (Leningrad, R.S.F.S.R.)
10.# 1 Zhurnal prikladnoi khimii (Leningrad, R.S.F.S.R.) English.
11. 1 Zhurnal prikladnoi khimii (Leningrad, R.S.F.S.R.). English.
Russian journal of applied chemistry

1. 1 Zhurnal prikladnoi mekhaniki i tekhnicheskoi fiziki
2. 1 Zhurnal prikladnoi spektroskopii
3. 1 Zhurnal Russkago fiziko-khimicheskago obshchestva
4. 3 Zhurnal strukturnoi khimii
5. 1 Zhurnal Vsesoiuznogo khimicheskogo obshchestva im. D. I.
Mendeleeva
6.# 1 Zhurnal Vsesoiuznogo khimicheskogo obshchestva im. D.I.
Mendeleeva.
7. 1 Zhurnalnaia forma schetovodstva v sovkhozakh
8. 1 Zhurnal'no-ordernaia forma ucheta na predpriiatiiakh lesnogo
khoziaistva / A. N. Edoshin. -
9. 1 Zhurnalno-ordernaia forma ucheta v kolkhozakh.
10. 1 Zhurnaly i doklady Sovieshchaniia po organizatsii
Ekaterinoslavskoi oblastnoi sel.-khoz. opytnoi stantsii,
sozvannage Ekaterinoslavskoi gubernskoi zemskoi upravoi
http://www.geocities.com/dritte123/PSPF.html
 http://forum.faithfreedom.org 		 
 
 
 
    murmur
(HyperLab Bee)
05-23-03 07:01
No 434908
       Translation     

1. Zhurnal = Journal
2. Zhurnal analiticheskoi khimii = Journal of analytical chemistry
3. Zhurnal epidemiologii i mikrobiologii = Journal of epidemiology and microbiology
4. Zhurnal evoliutsionnoi biokhimii i fiziologii = Journal of evolutional biochemistry and physiology.
5. Zhurnal fizicheskoi khimii = Journal of physical chemistry.
6.Zhurnal khimicheskoi promyshlennosti = Journal of chemical industry.
7. Zhurnal neorganicheskoi khimii = Journal of inorganic chemistry.
8. Zhurnal obshchei biologii = Journal of general biology.
9. Zhurnal obshchei khimii = Journal of general chemistry.
10. Zhurnal organicheskoi khimii = Journal of organic chemistry.
11. Zhurnal prikladnoi khimii = Journal of applied chemistry.
12. Zhurnal prikladnoi spektroskopii = Journal of applied spectroscopy.
13. Zhurnal Russkago fiziko-khimicheskago obshchestva = Journal of Russian physical and chemical society. 		 
 
 
 
    PolytheneSam
(Master Searcher)
05-23-03 14:28
No 434965
User Picture  		      Thanks, murmur. The Journal of Physical ...     

Thanks, murmur.  The Journal of Physical Chemistry (USSR) 24, 745-59 (1950) has the  'Electrochemical reduction of nitromethane to methylamine performed in aqueous HCl' article in it.  There's a gap in a couple of years (1949-1953) around that time at one library (WWII/cold war?).  At another library there is a gap in the 1940's - 1950's in the Journal of General Chemistry USSR, but I found the article I was looking for at the first  library.  I'll see if I can find J. Phys. Chem. USSR somewhere else.

Edit: If you need this article, you can see it here: http://chemister.da.ru/Books/Chembooks/Zhurnals/ZhPhysChem1950-06.djvu /murmur
http://www.geocities.com/dritte123/PSPF.html
 http://forum.faithfreedom.org 		 
 
 
 
    murmur
(HyperLab Bee)
05-26-03 06:33
No 435556
       Journal of physical chemistry 1950     

If you need this article, you can see it here: http://chemister.da.ru/Books/Chembooks/Zhurnals/ZhPhysChem1950-06.djvu 		 
 
 
 
    Rhodium
(Chief Bee)
05-26-03 10:50
No 435588
User Picture  		      Wonderful!     

Wonderful! Now we just need help with an english translation of the interesting parts. Does the article give you a generally positive impression? 		 
 
 
 
    jimwig
(Hive Bee)
06-14-03 18:19
No 440029
       Just received via snail mail the following in...     

Just received via snail mail the following in french.

"L'acide propionique et les propionates" by Dubosc
from Revue Generale de Chimie Pure et Appliquee -1909

Now how to translate this. Scan and ocr and translate - seems far fetched. Pay someone to translate. seems like a time far away. Copy it and send to some wouldBEE friend. Seems plausible. Any one out there interested?

Por favour!!! 		 
 
 
 
    Rhodium
(Chief Bee)
06-23-03 03:36
No 441836
User Picture  		      French: 1,4-BD to GBL using CuO/200°C/15h     

Post 441834 (Rhodium: "1,4-Butanediol to gamma-Butyrolactone in French", Methods Discourse) 		 
 
 
 
    mindlib
(Hive Bee)
07-10-03 20:00
No 446249
       Translation of a little
(Rated as: excellent) 		    

Biochemische Zeitschrift 128, pp 610 (1922)

....
....

A. Further statements about the bio-synthesis figure of l-Phenyl-acetyl-carbinol, C6H5*CHOH*CO*CH3


1,25 kg starchsyrup, which can serve as a cheap raw material, was solved in water; under addition of 1 kg barm Senst was then a volume of 25 l produced. After 1/2 hour fermentation, 100 g Benzaldehyd was added under stirring in small portions. After 3-day fermentation by room temperature, which was supported through often shaking, the barm was filtrated out over Kieselgur(ml:celite) and the filtrate (23,6 l) was ether-ed out in the style, Neuberg and Hirsch (115,282. 1919) described. The ether solution was cramped to a small volume, dried with annealed sodiumsulfate and then total liberated from the ether, which left a residuum of 91 g. It was absorbed with approx. 1/2 l ether and, for the removal of acid, shaken fast 2-times with each 100 ccm saturated soda solution, then shaken with the same amount of water. The united watery parts were ether-ed out once again and these extracts were given back to the mainamount. The achieved watery liquid is called acidfraction; there refurbishment will be described later in this report.

The, from acids liberated, etherlayer was shaken out 5-6 times each a 1/2 hour with each 200 ccm of a approx. 25% Sodiumbisulfitesolution. Also after this treatment had a probe of the ether residuum, from which was also SO2 removed, small amounts of Phenyl-brenztrauben-alkohol; because she reduced Fehlingsche mixture, but only in the boiling heat. A total quantitative seperation of the Ketol from the Benzylalkohol was not achieved through Sodiumbisulfite. To seperate the carry-along-Benzylalkohol-carry-over, the Sodiumbisulfitezone was shaken out once with ether, whereby they though given off a small amount Ketol again.

This ether portion wasn´t poured back to the stock solution, but finished off itself. In the following she is called intermediate fraction.

The losses of Ketonalkohol through the described treatment were balanced through the fact, that the recovered product from the Bisulfit-connection is very clean.

The last remaining ethersolution contained only the Benzylalkoholfraction and a small amount of high-boiling connections of indifferent characters.


c) Ketonalkoholfraction

The Sodiumbisulfitesolution was treaten at common temperature with solid Sodiumbicarbonat, so long, until the evolution of Kohlendioxyd stopped, (approx. 300 g was used).
Then it was shaken out immediately 5 times with ether, we united the ether extracts, dried over Glaubersalz and got after evaporation of the ether 21,5 g of a green-yellow oil.
The pressure of the vacuum-destillation was, through the bad caoutchouc material, not absolute constant.
Following fractions were caught:   (see table I)

b) Benzylalkoholfraction

During the evaporating of the, cleaned and dried over Na2SOx like described before, ether solution remained a residuum of 45 g. This provided through a vacuum destillation following fractions:   (see p612 above)

The fractions 1-3 didn´t reduce alkaline copper solution and were predominantly Benzylalkohol. Fraction 4 contained the rests of the Ketol, whilst the residuum comprised not nearer defined, in part higher molekular products, which weren´t seperated through destillation yet; maybe they are containing Methyl-phenyl-glykol. Those unknown part went over under 11 mm pressure mainly between 190-225° .

a) acidfraction

(ml: They got 2,4 g Benzoeacid, and 2 g of a residuum.)
No responsibility for translation faults; only for theory!! 		 
 
 
 
    mindlib
(Hive Bee)
07-10-03 20:32
No 446254
       ...     

and again:


c) Ketonalkoholfraction

The Sodiumbisulfitesolution was treaten at common temperature with solid Sodiumbicarbonat, so long, until the evolution of Kohlendioxyd stopped, (approx. 300 g was used).
Then it was shaken out immediately 5 times with ether, we united the ether extracts, dried over Glaubersalz and got after evaporation of the ether 21,5 g of a green-yellow oil.
The pressure of the vacuum-destillation was, through the bad caoutchouc material, not absolute constant.
Following fractions were caught:   (see table I) 		 
 
 
 
    mindlib
(Hive Bee)
07-11-03 15:21
No 446422
       rest of part two     

b) Benzylalkoholfraction

During the evaporating of the, cleaned and dried over Na2SOx like described before, ether solution remained a residuum of 45 g. This provided through a vacuum destillation following fractions:   (see p612 above)

The fractions 1-3 didn´t reduce alkaline copper solution and were predominantly Benzylalkohol. Fraction 4 contained the rests of the Ketol, whilst the residuum comprised not nearer defined, in part higher molekular products, which weren´t seperated through destillation yet; maybe they are containing Methyl-phenyl-glykol. Those unknown part went over under 11 mm pressure mainly between 190-225° .


a) acidfraction

(ml: They got 2,4 g Benzoeacid, and 2 g of a residuum.)
` should paint the city houses in thousand colours. 		 
 
 
 
    mindlib
(Hive Bee)
07-18-03 14:53
No 448282
       Translations of Biochemische Zeitschrift 115     

pp282 (1921)
--------------------------

Experimental Part


I. The retrieval of the Carboligase-effect

To a preparation of 280 g cane sugar and 280 g top-fermented barm (Senst) in 7 l water was added after the on-fermentation 25 ccm fresh destilled benzoeacid-free Benzaldehyd. The batch, which was left at room temperature, had at the next day only traces of smell of bitter almond oil. After addition of more 15 ccm Benzaldehyd, the fermentation-stuff stood 48 hours, until the evolution of Kohlensäure stopped and the smell of Benzaldehyd was away.
...
...
For the isolation is the extraction with ether practical, because it´s so possible, to extract through 3-4 times-removing the reducing substance almost completely from the fermentation stuff. 3 l of it was shaken so often with ether, until the residuum Fehlingsche Mixture also with digestion didn´t reduce. After seperation of the ether on the water-bath remained a bright-yellow oil, which had beside the characteristic smell of Benzaldehyd a prickley smell. The oil was´nt soluble in water(nearly nothing), in organic solvents easy soluble (with exception of petrolether and Ligroin), .... 



II. The chemical nature of the, through the Carboligase,    synthesized connection


a) .....

.....   New material was produced this time with a under-fermented barm-race.
The fermentation stuff contained 300 g Rohrzucker and 300 g barm (under-fermented beerbarm from the Berlin Institute for fermentation industry) in 7,5 l water. After occured on-fermentation was 30 ccm fresh-fractionated Benzaldehyd added and the mixture left 3 days at room temperature. We noticed the end of the fermentation now, as in the later Saccharose-experiments, through the negative outage of the Fehlingsche reaction in a pattern, which was before 4 times extracted with ether.   ........

b)......
The next experiments were aimed at the figure (so clean as possible) of the, through their Phenylhydrazon-known, substance.
To a solution of 600 g cane sugar in 15 l water was added 600g barm Senst and at once 60 ccm Benzaldehyd. After 3- day storage at room temperature was a quantum of 12,5 l filtrated fermentation-stuff extracted exhaustive with ether, the solvent after drying over annealed Glaubersalz (ml:sodium sulfate  *"H20") chased away on the water-bath, and the residuum destilled with vacuum. By 15 mm went- far above of the boiling point of benzaldehyd- between 102-156° a oily liquid over. Withal repeated rectifications wasn´t it possible to isolate, within narrow temperature ranges,  volatilised uniformly fractions. .............
Better results got later Mr.Dr. Ohle with the, over the bisulfite-connection cleaned, substance, which is currently busy with more analysis.  
....
The connection is soluble in alcohol, ether, Benzol, Toluol, Chloroform, Schwefelwasserstoff and Essigester, not or only very less in petrolether and Ligroin.

c) ....

600 g barm (Senst) was suspend (ml: third form??) in 15l water, which contained 600 g solved cane sugar. After the Kohlensäure evolution had begun, we did 60 g pure Benzaldehyd in, digested 4 days at room temperature and more 24 hours at 37° until the complete usage of the sugar happened. 11 l of the clear-filtrated mash was shaken with ether out, the extracts liberated through evaporation of the solvent and destilled under reduced pressure. Under 16-17 mm went over:     (ml:see table p298)

f)   .....
The base material was produced, like descriped often before, through the fermentation of 1 kg Saccharose in 25 l water with 1 kg Patzendorfer under-barm in presence of 100 g Benzaldehyd. From the filtrated fermentation-stuff was 23 l processed, the residuum of the ether-extract was seperated in the following parts:  (ml: see p301)


III. Inquests about the biochemical behavior of the Carboligase

a) ....
(ml: They found the Carboligase in all barm species, they used; in top-fermented barm, in under-fermented races and also in dried-compounds)

b) ....
The fermentation-stuff contained 1200g starchsirup 1)(1: We used it instead of pure grape-sugar, because of its cheaper price.) and 1 kg barm Engelhardt in a total volume of 25 l. After the Kohlendioxydevolution occured, 80 ccm Benzaldehyd was added. After 3-day standing at room temperature, the fermentation was complete.
...
21,4 l filtrate was ether-ed out and rektifiziert after the evaporation of the ether.
(ml: see fractions I-V at page 303)
Portion I and II reduced Fehlingsche Solution in the heat, whilst the other portions reduced already in the cold.
The optical inquests of the three highest fractions (each 0,10 g in 5 ccm alcohol solved) showed in the 1-dcm-tube following values: (ml: see frations III-V page 303)

c) ....
(ml: in the experiments a and beta, they used sap, produced from dry-barm)
a) With exception of the first fraction, which smelled like Benzaldehyd, all fractions gave a positive Fehlingsche reaction in the cold. The optical inquests showed for fractions II-IV (each 1,0 ccm in 5,0 ccm abs. alcohol solved) no deflection. 1,0 ccm of the fraction V, in 5,0 ccm abs. alcohol solved, rotated in the same circumstances to the left, = -1,0° .
...
Whereon the creation of a inactive condensation-product during the cells-free fermenation in contrast to the creation of a active form during the fermentation with living barm is caused by, we cannot say. Maybe comes a Pseudomerisierung to the Dioxy-propenyl-benzol:
C6H5*CO*CHOH*CH3---------C6H5*C(OH):C(OH)*CH3,
which complies to the Enolcreation of the Ketozucker or to the relationships between Glycolaldehyd-dicarbonacid and Dioxy-maleinacid, into consideration.

beta) (ml: see fractions page 306)
The assay with Fehlingscher mixture gave for portion I
a positive reaction during boiling, whilst the other fractions reduced already in the cold. All parts were optical effectless.

d) Experiments about the alliance of Acetaldehyd and Benzaldehyd without coeval-proceeded fermentation.

alpha) ....
At 120-135° and 15 mm pressure went only a few drops of a yellow oil over, which didn´t reduce Fehlingsche solution and were optical inactive.
beta) (ml: see fractions at page 307)
The last portion congealed in parts to a crystal-mush and reduced Fehlingsche solution not until heating; the first was mostly Benzoeacid. As a result of the low yield of the reducing substance wasn´t it possible to produce a derivative of the Ketonalcohol.

e)...
alpha) 200g barm (Engelhardt) was allocated in 10 l water and to this was added 25 g fresh-fractionated Brenztraubenacid. The mixture was digested at 37° . After 24 hours it was possible to see the Carboligase-effect in the occuring of a optical activity. The filtrated fermentation-stuff showed in the 2-dcm-tube -0,4° .
We added again, because the smell of the bitter almond oil was nearly disappeared, 10 ccm Benzaldehyd. After 48 hours we added 100 g Barm and 8,0 g Brenztraubenacid. At the next day the rotation in the 2-dcm-tube was -0,75° . When after 6 days the CO2 evolution ended, we filtered, and ether-ed out 9300 ccm. (ml:13-14 mm pressure, see fractions page 308)

beta) In a other experiment the fermentation-stuff contained 25 g Brenztraubenacid and 20 g barm (Senst) in a total volume of 10 l . After the on-fermentation was added 20 ccm Benzaldehyd, and after more 6 hours 5ccm. After 3 days at 37° the reaction had finished. 9480 ccm of the filtrated fermentation-stuff was ether-ed out and the residuum, which remained after the flash-off of the ether, was destilled at 11-12 mm. (ml: see fractions page309)

Soon in the nozzle crytals appeared, the destillation was aborted. Part I reduced Fehlingsche mixture in the heat, all other parts already in the cold.
No responsibility for translation faults! 		 
 
 
 
    mindlib
(Hive Bee)
07-22-03 10:38
No 449040
       ...     

III. Inquests about the biochemical behavior of the Carboligase

a) ....
(ml: They found the Carboligase in all barm species, they used; in top-fermented barm, in under-fermented races and also in dried-compounds)

b) ....
The fermentation-stuff contained 1200g starchsirup 1)(1: We used it instead of pure grape-sugar, because of its cheaper price.) and 1 kg barm Engelhardt in a total volume of 25 l. After the Kohlendioxydevolution occured, 80 ccm Benzaldehyd was added. After 3-day standing at room temperature, the fermentation was complete.
...
21,4 l filtrate was ether-ed out and rektifiziert after the evaporation of the ether.
(ml: see fractions I-V at page 303)
Portion I and II reduced Fehlingsche Solution in the heat, whilst the other portions reduced already in the cold.
The optical inquests of the three highest fractions (each 0,10 g in 5 ccm alcohol solved) showed in the 1-dcm-tube following values: (ml: see frations III-V page 303)

c) ....
(ml: in the experiments a and beta, they used sap, produced from dry-barm)
a) With exception of the first fraction, which smelled like Benzaldehyd, all fractions gave a positive Fehlingsche reaction in the cold. The optical inquests showed for fractions II-IV (each 1,0 ccm in 5,0 ccm abs. alcohol solved) no deflection. 1,0 ccm of the fraction V, in 5,0 ccm abs. alcohol solved, rotated in the same circumstances to the left, = -1,0° .
...
Whereon the creation of a inactive condensation-product during the cells-free fermenation in contrast to the creation of a active form during the fermentation with living barm is caused by, we cannot say. Maybe comes a Pseudomerisierung to the Dioxy-propenyl-benzol:
C6H5*CO*CHOH*CH3---------C6H5*C(OH):C(OH)*CH3,
which complies to the Enolcreation of the Ketozucker or to the relationships between Glycolaldehyd-dicarbonacid and Dioxy-maleinacid, into consideration.

beta) (ml: see fractions page 306)
The assay with Fehlingscher mixture gave for portion I
a positive reaction during boiling, whilst the other fractions reduced already in the cold. All parts were optical effectless.

d) Experiments about the alliance of Acetaldehyd and Benzaldehyd without coeval-proceeded fermentation.

alpha) ....
At 120-135° and 15 mm pressure went only a few drops of a yellow oil over, which didn´t reduce Fehlingsche solution and were optical inactive.
beta) (ml: see fractions at page 307)
The last portion congealed in parts to a crystal-mush and reduced Fehlingsche solution not until heating; the first was mostly Benzoeacid. As a result of the low yield of the reducing substance wasn´t it possible to produce a derivative of the Ketonalcohol.

e)...
alpha) 200g barm (Engelhardt) was allocated in 10 l water and to this was added 25 g fresh-fractionated Brenztraubenacid. The mixture was digested at 37° . After 24 hours it was possible to see the Carboligase-effect in the occuring of a optical activity. The filtrated fermentation-stuff showed in the 2-dcm-tube -0,4° .
We added again, because the smell of the bitter almond oil was nearly disappeared, 10 ccm Benzaldehyd. After 48 hours we added 100 g Barm and 8,0 g Brenztraubenacid. At the next day the rotation in the 2-dcm-tube was -0,75° . When after 6 days the CO2 evolution ended, we filtered, and ether-ed out 9300 ccm. (ml:13-14 mm pressure, see fractions page 308)

beta) In a other experiment the fermentation-stuff contained 25 g Brenztraubenacid and 20 g barm (Senst) in a total volume of 10 l . After the on-fermentation was added 20 ccm Benzaldehyd, and after more 6 hours 5ccm. After 3 days at 37° the reaction had finished. 9480 ccm of the filtrated fermentation-stuff was ether-ed out and the residuum, which remained after the flash-off of the ether, was destilled at 11-12 mm. (ml: see fractions page309)

Soon in the nozzle crytals appeared, the destillation was aborted. Part I reduced Fehlingsche mixture in the heat, all other parts already in the cold. 		 
 
 
 
    mindlib
(Hive Bee)
07-22-03 13:56
No 449052
       quinone translation     

First one:
....,reacts with water plus alcohol and .......
AAV 4:
...in THF and spiked with Pd/C (10%).
AAV 5:
"DDQ amount conflict" 		 
 
 
 
    Rhodium
(Chief Bee)
07-22-03 14:03
No 449053
User Picture  		      I'm not sure this is really helpful...     

Excuse me mindlib, but this doesn't look like a real translation to me, it is rather a machine translation between german and english, right? 10% of the words are not translated, many are translated wrong (especially in a chemical context) and there is no grammar whatsoever... 		 
 
 
 
    mindlib
(Hive Bee)
07-22-03 14:21
No 449056
       ..     

Hmm, I let the chemical names in the german version (except for some endings) to avoid faults there.
Which words are translated wrong ?
I tried to let the sense in the translation, and translated near (---grammar) to the german sentences. Also I´m not a chemist and translated parts of the texts, which looked important.
..and, for da grammar..... so it is....... 		 
 
 
 
    Flogiston
(HyperLab Bee)
07-23-03 12:26
No 449248
User Picture  		      Novel method of synthesis of 2-(beta-aminopropyl)-
(Rated as: excellent) 		    

Novel method of synthesis of 2-(beta-aminopropyl)-1,4-dimetoxybenzene

Y.M. Yutylov, V.F. Malutina, L.I. Shcherbina, K.M. Krylova
Institute of phisical and organic chemistry and carbonchemistry, NAS of Ukraine, Donetsk.

Requsted by Chimimanie.

Experimental part.

The chromatographing of 2-(beta-oxypropyl)-1,4-dimetoxibenzene and 2-(beta-aminopropyl)-1,4-dimetoxibenzene
was executed on a gas chromatograph L.CH.M.-8M. The length of the column  1.5 m, the diameter 3mm;
The bearer - Chromaton N-AW (0.16 - 0.20 mm   ), containing 5% of XE-60 phase; Temperature of the thermostat 200 C,
temperature of the evaporator  - 250; gas-bearer - helium.

2-(beta-oxypropyl)-1,4-dimetoxibenzene (V).
A)  Into 0.25 L flask , equipped with a low-temperature thermometer, stirrer, drop funnel, backflow condenser,tube for the introduction of dry nitrogen (the speed of one was controled by a sweet counter, connected to the backflowcondenser exit), 10 ml of the absolute ether were placed. When the flask was flushed by nitrogen, 1.4 g. of well cuted lithium were added, with constant flow of nitrogen. Lithium had a form of a plate with a square 1 sm^2, and thickness 1-2mm. The temperature was reduced to -15 C. During constant stirring, 10.3 ml (9.16 g., 0,2 mol) of a dry n.-butylchloride were added from the drop funnel at temperature (-15)-(-10) C. The reaction mass was holded at 0 C during   2 hr., and then temperature was rised to 20 C (it rises by itself) and  a solution of 10.35 g. (0.075 mol) 1,4-dimetoxibenzene [13] in 40 ml of absolute ether was added in one portion. The mixture was stirred during 1 hr., and left for a night. 10 ml (8.59 g, 0.15 mol) of a dry alpha-propyleneoxide at 0 C were added dropwise to the reaction mixture at 0 C the next day during 1 hr., and the mixture was stirred
during 3 hr., and left for a nihgt. The content of the flask was poured out into 150 ml of cooled water. The layer of ether was separated and water solution was extracted with 2x20 ml ether, united, dried over waterless Na2SO4, then the solvent was topped. The residue was distiled in vacuum and a fraction 159-161 C at  8 mmHg was gathered.  12.8 g. (87%) of  2-(beta-oxypropyl)-1,4-dimetoxibenzene of a high purity were obtained.

B)  Butyllithium, which was received as described in the section A from 30g (4.28 mol) of lithium, 244 ml (217 g) of chlorous n.-butylchloride in 110ml of dry ether, was added, during intensive stirring at 0 C to a solution of 220(1.6 mol) g of dimethyl ether hydroquinone in 350 ml of dry m-xylol. (Volume of the flask = 2L) Reaction mass was holded during 1hr. with constant growth of temperature from 0 to 10 C, then temperature was raised to 20 C and the mass was holded during 16 hr. Then temperature was decreased to 0 C and 223 ml (191g, 3.3 mol) of dry propylenoxide were added by drops at intansive stirring. The mixture was heated to room temperature and holded for 16 hr. then it was poured out into water, water layer was separated and washed thrice by portions of  15s ml of m-xylol. The xylolic solutions were united with the main mass of xylol solution and dried over waterless Na2SO4 for 2-3 hr., then m-xylol and diethyl ether hydroquinone were distiled (130-132 C  8 mmHg.). The residue was distiled in vacuum 159-161 C at  8 Hgmm.  Yield of spirit - 281.5g (90%).

C)  500 ml of dry m-xylol were added to 70g (10 mol) of fine cutted lithium in argon atmosphere in a 5 L three-neck-flask equiped with a stirrer, backflow condenser, drop funnel, a thermometer and a tube for a introduction of a gas. 570 ml (507.3 g 5.48 mol) of n-butylchloride were added by drops at an intensive stirring and temperature (-15 C) -(-10 C). After 2 hr. of stirring   solution of  515g (3.73 mol) of dimethyl ether hydroquinone in 1000 ml of dry m-xylol was added to the mixture at 0 C, then stirring during 1 hr.
and then holding at room temperature  15-17 hr. Then the mixture was cooled to 0 C and  520 ml (446.68 g 7.7 mol) of dried over molecular sieves of 3A type propylenoxide (15g of sieve per 0.5 L) was added during 1.5-3.0 hr. After 3 hr. of stirring the mixture was holded at room temperature during 15-17hr. Then unreacted lithium was separated, reaction mass was washed by water, dried over 100 g. of waterless sodium sulfate, then m-xylol was topped   and the product  of the reaction was distiled in vacuum. boiling point 159-161 C at  8 mmHg . 
Yield of spirit 475 g. (~65%).

D) 51.5g (0.37 mol) of dimethyl ether hydroquinone and 7 g. (1 mol) of fine cutted lithium were added to a solution of 100 ml of dry m-xylol in argon environment. (The mixture is in a 0.5 L round-bottom flask equipped with a low-temperature thermometer, stirrer, drop funnel, backflow condenser, tube for the introduction of a gas).  The temperature reduced to -10 C. Then at constant stirring 10.3 ml (0.1 mol)of n-butylchloride was added by drops at temperature -10 C. Then the mixture was holded at the temperature during 2 hr., then temperature was enabled to raise spontaneously to room temp. and the mixture was holded during 15-17 hr. Then the reaction mass was cooled to 0 C, and 52 ml (0.75 mol) of dried over  molecular sieves propylenoxide was added by drops during 1-1.5 hr. After 2 hr. of stirring the mixture was left at room temperature for 15-17 hr. Then unreacted lithium was separated, the reaction mass was washed by water, dried over 10 g. of waterless sodium sulfate, then m-xylol was topped   and then unreacted 1,4-dimetoxybenzene and the product of the reaction was distilled in vacuum. Boiling point 159-161 C 8 mmHg . The yielfd of spirit 46 g. (63%).


2-(beta tosyloxipropyl)-1,4dimetoxybenzene (V|||).
982 g.(5 mol)of  2-(beta-oxypropyl)-1,4-dimetoxybenzene and 2.0 L.(24.7mol) of pyridine, dried over solid alkali were loaded in a 5 L. flask . The content of the flask cooled to 0 C and at intensive stirring  953 g. (5 mol )
of a fines n-toluenesulfochloride were added. Rise of temperature to 55 C was observed. The flask was closed up by a cork and putted to a refrigerator (+5 C) for 15 -20hr.
A  residue of muriatic pyridine and a weak yellow color appeared.  The reaction mixture was poured out into 10 L of water with ice. The reaction product was filtered, washed by water, by 5% solution of  hydrochloric acid, again by water and by 0.1 L of methanol.  Received 2-(beta tosyloxipropyl)-1,4-dimetoxybenzene was dried on air.
The yield of tosylat is 1647-1699 g. (94-97%). The boiling point 73.5-74.0 C.
The filtrate was acidified by a concentrated HCl (1 L), evaporated, the recidue was hardly alkalified by a Concentrated solution of  NaOH,  pyridine was separated, dried and distilled.

2-(beta-benzenesulfonyloxipropyl)-1,4 dimetoxibenzene (|X).
into 250 mL flask there were placed 39 g. (0.2 mol) 2-(beta-oxipropyl)-1,4dimetoxibenzene and 20 ml (0.24 mol)dried pyridine.  The mixture was cooled to 0 C and to a stirred mixture 26 g. (0.2 mol) of benzenesulfochloride was added.  The rxn was left standing for 20 hr. at 0-5 C. Then the rxn was poured into 300 ml  of 10% solution of hydrochloric acid. The  upper organic layer was separated and dried  on air during 5 hr.
Yield – 65 g. (97.2%) Boiling point 44.5-46.0 C.


2-(beta-n-Nitrobenzenesulfonyloxypropyl)-1,4-dimetoxybenzene (X||)
The experiment was made similar to the receiving of tosylat (V|||) from 1.96 g. (0.01 mol) 2-(beta-oxypropyl)-1,4-dimetoxybenzene in 40 ml of pyridine and 4.4 g. (0.02 mol) n-nitrobenzenesulfochloride.
Yield of nitrobenzenesulfonate – 3.3 g. (87%). Purification – recrystallization from a spirit. Boiling point 97-98 C.


2-(beta-aminopropyl)-1,4- dimetoxybenzene (|)
A. Into 2.7L autoclave, (for work at 50 atm.) there were placed 350.5 g. (1 mol) of 2-(beta-tosyloxpropyl)-1,4-dimetoxybenzene (V|||) and 1700-1800 Ml of liquid ammonia, then the mixture was warmed during 8 hr at 50-60 C. After the ending of the rxn the valve of  the autoclave was opened and with light warming (40-45C) ammonia was slowly distilled into a small steel vacuum balloon (3.5 L) cooled to 5-10 C. After cooling to room temperature into opened autoclave 300 ml of benzene were poured and stirred until lime appeared. The residue of the ammonium salt of n-toluenesulfacid was filtered out in Buchner funnel and washed by 3 portions of benzene (3 x 50ml). The bezene solution of amine was washed in a separating funnel in two
Portions (2x250 ml) of weak hydrochloric acid (1:3). Amine was separated by adding to water-acid extract 20% solution of KOH until pH 9-10 wasn’t received. The oily layer, containing amine was separated and dissolve in benzene (200ml). The solution was dried for 5 hr. by solid alkali and after the distillation of the dissolvent, 2-(beta-aminopropyl)-1,4dimetoxibezene at 144-148 C 8  mmHg  was distilled
Yield of amine 168-176 g. (86-90 %)

B) Ammonolysis of 2-(beta-n-nitrobenzenesulfonyloxipropyl)-1,4-dimetoybenzene (X||) was made similarly to Ammonolysis of tosylate (V|||). From 38.1 g. (0.1 mol) nitrobenzenesulfonate (X||) in 150ml of liquid ammonia 14.4 g. (65%) of amine(|) were received.

C) Ammonolysis 2-(beta-benzenesulfonyloxipropyl)-1,4dimetoxybenzene (|X) was made similarly to Ammonolysis of tosylate (V|||). From 33.6 g. (0.1 mol) of benzenesulfonate (|X) in 150 ml of liquid ammonia 13.7 g. (70%) of 2-(beta-aminopropyl)-1,4-dimetoxybenzene (|) were received.
Hare Krishna 		 
 
 
 
    Chimimanie
(Hive Bee)
07-23-03 12:59
No 449252
User Picture  		      HC Chem     

Its Hardcore Chemistry, but it is always nice to see a 75% yield from dimethoxybenzene to 2,5 DMA!laugh

Imagine the number of DOB doses they could do from 170g DMA!shocked

Thank you for your translation Flogistoncool 		 
 
 
 
    Vitus_Verdegast
(Hive Bee)
08-02-03 15:09
No 451248
User Picture  		      Japanese patent (it's only 6 pages ;-) )     

PREPARATION OF N- SUBSTITUTED METHYLENE TRYPTOPHAN ESTER

PURPOSE:To obtain the titled compound which is an intermediate for tryptophan in high yiled under mild conditions, by reacting an N-(substituted methylene)glycine ester with a (3-indolylmethyl)trialkylammonium salt as raw materials.
CONSTITUTION:An N-(substituted methylene)glycine ester of formula I [R<1> and R<2> are H, alkyl, (un)substituted aryl or (non)cyclic thioketal residue; R<3> is ester residue] is reacted with a (3-indolylmethyl)trialkylammonium salt of formula II (R<4>, R<5> and R<6> are alkyl; X<-> is halide ion, sulfate ion, alkylsulfate ion, hydrogensulfate ion, hydroxyl ion, etc.) to give an N-(substituted methylene)tryptophan ester of formula III. The raw materials of formulas I and II are readily obtained in high yield. The reaction is preferably carried out in a homogeneous solvent and between two phases of solvents. The compound of formula III is hydrolyzed to afford tryptophan readily.


Patent JP56138171
A Dream Within A Dream (http://www.poedecoder.com/Qrisse/works/dreamw.html) 		 
 
 
 
    Rhodium
(Chief Bee)
08-05-03 22:19
No 451896
User Picture  		      Isosafrole to MDP2P by heating in DMSO     

This one is in japanese: Post 451720 (Rhodium: "Isosafrole to MDP2P by auto-oxidation!", Novel Discourse) 		 
 
 
 
    Herr_Ovalmeister
(Stranger)
08-13-03 00:16
No 453204
       Bulletin de la Société chimique de France...     

Bulletin de la Société chimique de France
year:  1964 pages 2523-2532 'La décarboxylation thermique des acides alpha-aminés' part I
year:  1965 pages 929-933 'La décarboxylation thermique des acides alpha-aminés' part II

The decarboxylation of amino acids (including tryptophan).

Can someone copy these and have a French speaker translate them or just the important parts? 		 
 
 
 
    Rhodium
(Chief Bee)
08-13-03 14:25
No 453326
User Picture  		      Spanish Translation Wanted     

New synthetic route for the preparation of potentially hypocholesterolemic analogs of alpha-asarone.
Determination of E/Z isomer content in natural and synthetic mixtures of alpha-asarone and its analogs.
Munoz, Heber; Diaz, Francisco; Sanchez, Adrian; Barajas, Marcelino; Labarrios, Fernando; Tamariz, Joaquin.   
Acta Mexicana de Ciencia y Tecnologia, 11(41), 51-62 (1993) (https://www.rhodium.ws/pdf/asarone.nueva.ruta.pdf)  

Abstract

A new and improved synthesis of potentially hypocholesterolemic (E)-2,4,5-R(MeO)2C6H2CH=CHMe [I, R = NO2, NH2] from eugenol is described.  This pathway also allows the prepn. of the 2-propenyl analogs.  Moreover, 5,6-dimethoxy-2-methylindole was also prepd. efficiently by this method.  -Asarone and (Z)-I [R = NO2] were also prepd. and the isomer ratios in natural and synthetic samples of -asarone and I [R = NO2] detd. by GC/MS. 		 
 
 
 
    Chimimanie
(Hive Bee)
08-13-03 19:45
No 453387
User Picture  		      German translation: mescalin analog     

Can someone translate the 'Resultate und Diskussion.' and the experimental of that:

https://www.rhodium.ws/pdf/mescaline.4-subst.analogs.pdf

Post 423427 (Rhodium: "Synthesis of Novel Mescaline Derivatives (German)", Novel Discourse)

I am especially interested in fluorinated mescalin analogcool

Thank!smile 		 
 
 
 
    Rhodium
(Chief Bee)
08-16-03 12:28
No 453903
User Picture  		      Russian Translation of 2,5-DMA Synthesis     

Novel method for synthesis of 2-(b-aminopropyl)-1,4-dimethoxybenzene.
Zhurnal Prikladnoi Khimii (Sankt-Peterburg), 72(10), 1691-1696 (1999) (https://www.rhodium.ws/pdf/archive/25-dma.russian.pdf)

Abstract originally posted in Post 426579 (Chimimanie: "ref on dimethoxy-alcohols", Russian HyperLab)
The full article originally posted in Post 428187 (Flogiston: "Fire in the hole!!!!!", Russian HyperLab) (DjVu format, last page has a minor data loss)

Edit: It seems like we have the experimental part already translated in Post 449248 (Flogiston: "Novel method of synthesis of 2-(beta-aminopropyl)-", Novel Discourse) (Thanks for noticing, Chimimanie, and thanks Flogiston for the translation - I honestly missed to read that post above last month).

Still, the first part of the article with results and discussion, it surely must contain interesting information unknown to western science. Can any russian speaker please look it over and summarize any interesting discussion about optimization, side reactions and references to related syntheses? There is no need for a word-to-word translation, I am just interested in taking part of any interesting information disclosed in the article. 		 
 
 
 
    Herr_Ovalmeister
(Stranger)
08-17-03 22:26
No 454192
       Here's the articles mentioned in Post 453204...     

Here's the articles mentioned in
Post 453204 (Herr_Ovalmeister: "Bulletin de la Société chimique de France...", Novel Discourse)
Can anyone translate these?

http://www.sciencemadness.org/scipics/LaDecarbI.PDF

http://www.sciencemadness.org/scipics/LaDecarbII.PDF 		 
 
 
 
    Herr_Ovalmeister
(Newbee)
08-22-03 02:39
No 454940
       for Post 453387 Here's the first paragraph.     

for
Post 453387 (Chimimanie: "German translation: mescalin analog", Novel Discourse)

Here are the first three paragraphs.


Results and Discussion -- In contrast to the earlier described method for the production of 2-(4-alkoxy-3,5-dimethoxyphenyl)-ethylamines first by alkylation and then reduction to the 2-phenylethylamine derivative following [8a] [8b], one made use of the commercially obtained syringealdehde (4-hydroxy-3,5-dimethoxy benzaldehyde; 7).  The ether synthesis with an alkyl halide RX in DMSO and with K2 CO3 and a catalytic amount of KI [12] also provided good to high yields by applying this reaction (83-97%; with an exception: 50% for 8c) and the reaction was finished within 1-3 hours.  The aldehydes 8a-i produced are of sufficient purity and were used in the Henry reaction with few exceptions without further purification.  (Schema):  Condensation of the aldehyde 8a-I with MeNO2 or EtNO2, which simultaniously serves as solvent, to the nitro-olefin 9a-e, respectively.  11a-i was very efficient assisted by a catalytic amount of BuNH2 and AcOH, comparable with many other aldehydes [13].  Reaction times of 15-60 minutes are enough to complete the conversion.  Yield (50-99%) depends on the efficiency of purification by crystallization.  Important:  it appears when monitoring the end of the reaction, in many cases byproducts are formed already a few minutes after completion of the reaction.

Interestingly enough, both nitro-olefins 9a and 9b are produced as the (E) and the (Z) product ((E)/(Z) 57:43 and 45:55).  In an entirely different synthesis the trans product is formed exclusively.  Using 1H-NMR spectroscopy it can be shown that occasionally two products with the same "splitting up", although partly very different chemical displacement (shift?) were present.  The GC/MS analysis showed that the product just from the mass passes (the test); the mass corresponds to 9b and 9c, respectively.  The effect of the temperature and the achirality of the GC-column were not further investigated, therefore the sequential reaction provides the desired product.

The reduction to the phenylakylamines 10a-e and 12a-i takes place with AlH3, generated from LiAlH4 and H2SO4 in THF [8d], where its shown that its enough when 95-97% H2SO4 is used instead of 100% (from oleum and concentrated H2SO4).  The yield as HCl salt is 49-81%. 		 
 
 
 
    Herr_Ovalmeister
(Newbee)
08-31-03 03:39
No 456547
       Here's the second and third paragraph: ...     

Here's the second and third paragraph:


Interestingly enough, both nitro-olefins 9a and 9b are produced as the (E) and the (Z) product ((E)/(Z) 57:43 and 45:55).  In an entirely different synthesis the trans product is formed exclusively.  Using 1H-NMR spectroscopy it can be shown that occasionally two products with the same "splitting up", although partly very different chemical displacement (shift?) were present.  The GC/MS analysis showed that the product just from the mass passes (the test); the mass corresponds to 9b and 9c, respectively.  The effect of the temperature and the achirality of the GC-column were not further investigated, therefore the sequential reaction provides the desired product.

The reduction to the phenylakylamines 10a-e and 12a-i takes place with AlH3, generated from LiAlH4 and H2SO4 in THF [8d], where its shown that its enough when 95-97% H2SO4 is used instead of 100% (from oleum and concentrated H2SO4).  The yield as HCl salt is 49-81%.
N'être que de la drogue 		 
 
 
 
    Chimimanie
(Hive Bee)
09-12-03 20:49
No 458736
User Picture  		      thanx     

Thank you for the translation, mister ovalmeister smile

for the decarboxylation article in french, which part are you interested most?

i have trouble with your pdf, but i own one of those article in my personal refs, and the other one i could fetch it at library soon. As far as i remember, the method use a ketone, like acetophenone, and they have got good yield for tryptophan, but not so good yield for alpha-methyl-phenylalanine, due to transamination reaction.

Ask me which part you are interested, for me i think the tryptophan one is good, and i will traduct you the relevant experimental if you are interested.

Chimimanie.cool 		 
 
 
 
    Rhodium
(Chief Bee)
09-13-03 14:14
No 458864
User Picture  		      Chinese 3,4,5-MeO-BA article translation wanted     

Improved synthesis of 3,4,5-trimethoxy-benzaldehyde
Chemical Reagents/Huaxue Shiji 21(1), 50 (1999) (https://www.rhodium.ws/pdf/345-tmba.huaxue.shiji.21.50.1999.pdf) 		 
 
 
 
    Lego
(Hive Bee)
09-23-03 15:36
No 460561
User Picture  		      Reduction of oximes w/ yeast,Ph.D. thesis Brazilia     

http://biq.iqm.unicamp.br/arquivos/teses/ficha38180.htm

Edit: I noticed you had to register; the direct link for this thesis is: http://biq.iqm.unicamp.br/arquivos/teses/IQ38180.pdf

Autor: Kreutz, Olyr Celestino

Título: Síntese de a-oxo-o-metiloximas e Redução Enantiosseletiva com Fermento de Pão. Obtenção de Intermediários para a Preparação de 1,2-aminoálcoois Quirais

Ano: 1999

Orientador(a): Prof. Dr. Paulo José Samenho Moran

Departamento: Química Orgânica

Palavras-chave
Biotransformação, Baker's yeast, Saccharomyces cerevisiae

Resumo: Neste trabalho foram desenvolvidas metodologias de redução assimétrica de alfa-oxo oximas do tipo ArC(O)C(NOR)R, utilizando Fermento de Pão como agente de redução assimétrica. Sintetizou-se várias alfa-oxo oximas (64 a 96% de rendimento) com o objetivo de estudar a influência dos grupos Ar, R e R (Ar = Bn, Furil, Naftil, 3,4-metilenodioxifenil, R = R = H = alquil ou aril) na enantiosseletividade da redução da função cetônica pelo Fermento de Pão (Saccharomyces cerevisiae). Os resultados obtidos na redução enantiosseletiva destes compostos demonstram a grande aplicabilidade desta estratégia na síntese de 1,2-aminoálcoois opticamente ativos. Os álcoois obtidos (65-99% de excesso enantiomérico) podem ser intermediários para a preparação da norefedrina, norpseudoefedrina e análogos. Foi feito um estudo de Ressonância Magnética Nuclear para determinação da configuração (E/Z) da ligação C=N destas oximas. Para tanto, sintetizou-se os dois isômeros possíveis e, através da comparação dos respectivos espectros de RMN H e C foi possível estabelecer a configuração.

Abstract: In this work, methodologies for asymmetric reduction of alpha-oxo-oximes, ArC(O)C(NOR)R, had been developed using Baker's yeast as reduction agent. Several alpha-oxo oximes (64-96% yield) where synthesized in order to study the influence of the groups Ar, R and R (Ar = Bn, furyl, naphthyl, 3,4-mehtylenedioxyphenyl, R1 = R = H = alkyl or aryl) in the enantiosselectivity of the reduction of the keto function by Baker's yeast (Saccharomyces cerevisiae). The results of these enantioselective reductions indicate the great applicability of this strategy in the synthesis of optically active 1,2-aminoalcohols. The obtained alcohols (65-99% ee) are intermediates for the synthesis of norephedrine or norpseudoephedrine analogous. A Nuclear Magnetic Resonance study was made to estabilish the E/Z configurations of the C=N bond of those oximes. In such way, the two possible isomers where synthesized and, through the comparison of the NMR H and C spectra of these compounds it was possible to assign the respective E/Z configuration.



The author synthesizes optical active norepedrine-derivates of MDA via reduction of [alpha]-oxo-oximes with yeast.

Could some Spanish/Portuguese (sorry, don't even know the exact language of this thesis) speaking bee translate the essential parts of the Ph.D thesis and post it?

Thanks alot......
The candle that burns twice as bright burns half as long 		 
 
 
 
    thallium
(Hive Bee)
11-16-03 17:15
No 471228
User Picture  		      Re: Lego:Reduction of oximes w/ yeast,Ph.D. thesis     

I noticed you had to register; the direct link for this thesis is: http://biq.iqm.unicamp.br/arquivos/teses/IQ38180.pdf
Video meliora, proboque; Deteriora sequor. -Ovid 		 
 
 
 
    Lego
(Hive Bee)
12-02-03 21:53
No 474351
User Picture  		      Translation of Czech article needed     

Chemicke Listy  (1990),  84(9),  993-4. 
An improved preparation of phenylacetone
Kizlink, Juraj.    Chem.-Technol. Frak,  SVST,  Bratislava,  Czech.
Journal  written in Czech.
Abstract: PhCH2COMe is prepd. in 52-67% yield from PhCH2COOH, AcONa or AcOK, and Ac2O in the presence of anhyd. CuSO4 at reflux for 24 h.

Azole has copied this article and scanned it as a djvu-file.
http://hyperlab.0catch.com/ChemickeListy_1990_84_993.djvu
If the link does not work please send a PM.

At the end is an english abstract which can bee even understood by Lego. This method seems to bee interesting as the workup is easy.
The candle that burns twice as bright burns half as long 		 
 
 
 
    Major_Armstrong
(Stranger)
12-29-03 02:20
No 479557
       Need translation of the Cong Nghiep Hoa Chat...
(Rated as: good read) 		    

Need translation of the Cong Nghiep Hoa Chat article mentioned here
Post 398635 (Mountain_Girl: "Methyl Eugenol synth references", Novel Discourse)

http://home.ripway.com/2003-12/43034/Chemtext1/CongNghiep1.tif

http://home.ripway.com/2003-12/43034/Chemtext1/CongNghiep2.tif

http://home.ripway.com/2003-12/43034/Chemtext1/CongNghiep3.tif

In table two (Bang 2) on page 1 the right side is reaction time in hours.  It appears that 5 hours is enough to reach equilibrium when mixing CH3OH and H2SO4.  Table 1 seems to show that a molar ratio of CH3OH/H2SO4 of 1:1.5 provides the best % yield of CH3SO4H. 		 
 
 
 
    karel
(Newbee)
01-04-04 22:29
No 480406
       Translation for Lego     

An improved preparation of phenylacetone
Kizlink, Juraj  
Chemicke Listy  (1990),  84(9),  993-4. (http://hyperlab.0catch.com/ChemickeListy_1990_84_993.djvu) Journal  written in Czech.

Abstract
PhCH2COMe is prepd. in 52-67% yield from PhCH2COOH, AcONa or AcOK, and Ac2O in the presence of anhyd. CuSO4 at reflux for 24 h.




Here is translation of Slovak article from Chemicke Listy:

Phenylacetone - benzylmethylketone, 1-phenyl-2-propanone, C9H10O, is important intermediate in chemical, pharmaceutical industry and cosmetics. It is prepared by various methods; one branch of them are they using Grignard reagents [1,2], chloroacetone [3] or by saponification of phenylacetonitrile [4,5]. The second branch is based on decarboxylation of phenylacetic acid (or its salts) and reaction with acetic anhydride. For those methods the most determining factor is velocity and completeness of its decarboxylation, which can be improved by various catalysts. Reaction can be conducted by dry distillation of calcium salts of phenylacetic and acetic acid [6,7], boiling of mixture of these acids with alkali acetates [8-10], pyridine or quinoline [11], or methyllithium [12]. Advantageous are also the methods based on passing of phenylacetic-acetic acid mixture over various catalysts as ThO2 [5,13] or MnCO3 [14] at 350-400 C. Crude product is usually purified by fractionation or bisulfite method. Pure phenylacetone has m.p. -15 C, b.p. 215 C, d = 1.0018, nD = 1.5164; its
semicarbazone [8,11] has m.p. 188-198 C, thiosemicarbazone [15] m.p. 155 C, phenylhydrazone [9] m.p. 85 C, 4-nitrophenylhydrazone [16] m.p. 143 C and 2,4-dinitrophenylhydrazone [17] m.p 156 C.

Disadvantageous is long reaction time 24-72 h for liquid-phase methods and workup of the reaction mixture by neutralization with hydroxide, extraction or fractionation of its large volume for all methods. Yields are 30-50 % for liquid-phase methods and 40-65 % for gas-phase methods. The improved method provides yields min. 50 % with shorter reaction time, removing of the neutralization step, and replacement of extraction by easier decantation.

Experimental

To a mixture of 136 g (1.0 mol) phenylacetic acid, 70 g sodium or potassium acetate, and 16 g (0.1 mol) anhydrous cupric sulphate is introduced 2000 ml anhydrous acetic anhydride* in 4000 ml flask. The mixture is refluxed 24 h. After cooling 500 ml of solvent (CCl4, CHCl3, CH2Cl2) is added and the mixture is poured to a flask containing 2000 ml ice-water. After separation of layers upper layer is removed and lower layer is three times decanted with water, separated, dried (Na2SO4, CaCl2), and distilled. The solvent is distilled off and fractionation column is placed on the top of the flask. Remaining acetic acid and acetic anhydride is then removed, pure product is collected at 100 C (15 torr). Yield 70-90 g (52-67 %).

* Technical product, which contains water, can be dried by adding 10 g thionyl chloride. 		 
 
 
 
    Rhodium
(Chief Bee)
01-16-04 17:00
No 482852
User Picture  		      French: 4-chlorobutanal     

Could somebody who can read french take a quick look at Bull Soc Chim France 1441 (1963) (https://www.rhodium.ws/pdf/archive/4-chlorobutanal.grignard.djvu) and see if the article contains any 4-Chlorobutanal information of use (they're doing a grignard, but I can't read much beyond that).

I just want a summary of what they are doing, not a full translation (for now).
The Hive - Clandestine Chemists Without Borders 		 
 
 
 
    hypo
(Hive Addict)
01-16-04 19:32
No 482867
       4-chloro-butanal??     

they're comparing the action of Mg on halo-ketals:
in ether the ring is opened to give a glycol-ether
in THF the grignard reagent is formed except for saturated
alpha- or beta-halo-ketals.

i fail to see the connection with chlorobutanal except that
it could give a halo-ketal?
filter(lambda W : W not in 'ILLITERATE','BULLSHIT') 		 
 
 
 
    jsorex
(Hive Bee)
01-31-04 16:39
No 485702
User Picture  		      Lego, it says on the first page that it (or at     

Lego, it says on the first page that it (or at least a part of it) has been released in English:

Baker's yeast Reduction of (E).1.phenyl-1,2-propanedione 2-(O-methyloxime). A Key Step for a (-)-Norephedrine Synthesis. Olyr C Kreutz, Paulo J. S. Moran, José A. R. Rodrigues. Tetrahedron: Assymetry 1997, 8, 2649.

I could translate some part of it. I don't see anything valuable in it though? Which part is it that you are interested in?
-jsx 		 
 
 
 
    silenziox
(Hive Bee)
02-06-04 17:13
No 486912
User Picture  		      For Antoncho     

Could Antoncho or any other HyperLab Bee translate the following post: Post 419906 (Potter: "3-HO-4-Me-P2P из о-крезола", Russian HyperLab)
Holotna Pravda... Neskolko dnej iz zhizni siLENZiova   laugh 		 
 
 
 
    Zamboni
(Stranger)
02-14-04 15:34
No 488612
       Aptechnoe Delo 1958     

Russian article needs translation (all or most important points).  Aptechnoe Delo (Apothecary's Stuff).  Found in Chemical Abstracts 54: 12491e:

http://home.ripway.com/2004-2/71090/Chemarticles/AptAbs.jpg 
size = 55KB

(5 MB maximum transfer per day for free accounts)


pdf of article and English abstract:

http://home.ripway.com/2004-2/71090/Chemarticles/AptDelo.pdf
size = 519KB


Questions:

1) What solvents are used in the liquid chromatography process?

2) Do they determine the concentration of apiole and/or myristicin in solvent or chromatographic fractions by using sulfuric acid as an indicator and then using colorimetry or a spectrometer? 		 
 
 
 
    azole
(A Truly Remarkable HyperLab Bee)
02-15-04 15:28
No 488840
       Re: Aptechnoe delo     

From
Spasmolytic substances present in the seeds of Petroselinum sativum.
D. G. Kolesnikov, N. P. Maksyutina, and P. I. Bezruk
Aptechnoe Delo, 7(4), 27-30 (1958).

<Satisfactory analytical data were obtained for the isolated substances.>

   For the isolation of apiole, the following adsorption chromatographic method was developed:
   Parsley seeds are extracted with ethyl alcohol; after cooling to 10-12 °C, allyltetramethoxybenzene crystallizes out (m. p. 25 °C); the alcohol is evaporated, and the residue is treated with ligroin. The ligroin-insoluble residue (a mixture of flavonoglycosides) is separated, and the ligroin solution is chromatographed on alumina. The eluate (each liter) is monitored using a color reaction with concd. H2SO4, and the content of extractives is determined (probably by evaporating the solution and weighing the residue). The results of the chromatographic separation are presented in Figure 1.
parsley.gif

Figure 1. Separation of the ligroin extract from 10 kg of parsley seeds.
a - fatty and volatile oils; b - apiole and myristicin; c - a substance with m. p. 145 °C.

   The oils are eluted first, then follow apiole and myristicin, and the last eluted is the substance melting at 145 °C. Apiole crystallizes easily (m. p. 30-35 °C) after evaporating the solvent and cooling. Its yield is 1.5% of the weight of dry seeds (myristicin 0.6% (liquid), allyltetramethoxybenzene 0.001%).

The authors didn't specify the volumes of ethanol and ligroin used for the extraction, and the amount of alumina. No boiling range is given for ligroin (actually called benzin in the article). The eluent was not explicitly mentioned; one can assume that it was ligroin. - Comments by azole. 		 
 
 
 
    Zamboni
(Stranger)
02-16-04 17:22
No 489075
       Thanks, azole. BTW, it appears to say in table     

Thanks, azole.  BTW, it appears to say in table I that the reaction of H2SO4 with apiole or myristicin gives a red color while with tetramethoxyallylbenzene its colorless. 		 
 
 
 
    lugh
(Moderator)
02-23-04 02:31
No 490498
       Polish Translation Needed     

From Post 485919 (Zamboni: "Dissertationes Pharmaceuticae", Novel Discourse)

Infrared absorption spectra in the 1-14 micron range of apiole, 1,2,3,6-tetramethoxy-4-allylbenzene, myristicin, etc. obtained from various essential oils are recorded and discussed.

http://home.ripway.com/2004-2/71090/Chemarticles/DissPharm63-419-426.pdf

smile
Chemistry is our Covalent Bond 		 
 
 
 
    Major_Armstrong
(Hive Bee)
02-23-04 03:23
No 490511
       Thanks, lugh. Here's the abstract from ...     

Thanks, lugh.  Here's the abstract from Chemical Abstracts:

CA61:4145b

Infrared spectrophotometric studies of compounds occurring in essential oils.  I.  Teresa Biernacka, Barbara Kontnik, Andrzej Parczewski, and Zdzislaw Rajkowski (Akad. Med., Warsaw).  Dissertationes Pharm. 15(4), 419-26(1963)(in Polish).  The infrared absorption spectra in the 1-14 µ range of apiole, 1,2,3,6-tetramethoxy-4-allylbenzene, myristicin, osthole, peucedanin, and alantolactone obtained from various essential oils are recorded and discussed. 		 
 
 
 
    java
(Hive Bee)
06-13-04 18:25
No 513180
       Die Synthese optisch aktiver ...(English needed)     

Die Synthese optisch aktiver N-Monomethyl-Aminosäuren
P. Quitt, J. Hellerbach und K. Vogler
Helv. Chim. Acta 46, 327-333 (1963) (https://www.rhodium.ws/pdf/n-methyl-amino.acids.pdf)

Abstract
A synthesis of optically active N-monomethylated amino acids (V) is described. It involves a three-step process, starting from optically active amino acids (I) which are converted into their benzyl derivatives (III), subsequently methylated (IV) and finally hydrogenolyzed. The reaction sequence proceeds without racemization

English translation need ....java
Just hold on to the thread...that keeps us going
http://www.chiapaslink.ukgateway.net/ 		 
 
 
 
    Lego
(Hive Bee)
06-20-04 20:28
No 514450
User Picture  		      French translation of tryptamine synthesis needed     

Can any french speaking bee translate the interesting parts of this article?

No 226. - Recherches en série indolique. XVII. - Préparation de quelques indolines, indoles et tryptamines oxgénés en positions -4 ou -6 par cyclisation "arynique"
Marc Julia, Hubert Gaston-Breton
Bull. Soc. Chim. Fr., 1966, 1335-1342


See also: Post 514448 (Lego: "More on nitrostyrenes and lithium enolates", Tryptamine Chemistry)

Merci beaucoup! cool
The tendency is to push it as far as you can 		 
 
 
 
    armageddon
(Hive Bee)
07-04-04 17:52
No 517412
       Re: Die Synthese optisch aktiver ...     

Java: which part of the article are you interested in? I would suppose the experimental part? I'm asking because seven pages is a whole lot of text, so I probably will only translate the part desired by you - is it the rxn mechanism/theoretical part or the experimental/preparative part you'd prefer for having translated?

Greetz A
"..ein Trank von unterschiedlicher Farbe, in ihm ist Heilung für die Menschen." 		 
 
 
 
    java
(Hive Bee)
07-05-04 02:09
No 517502
User Picture  		      Transalte the theory.....     

armageddon

The rxn mechanism/theoretical part would be nice  to understand the mechanism....thankx..java
Just hold on to the thread...that keeps us going
http://www.chiapaslink.ukgateway.net/ 		 
 
 
 
    armageddon
(Hive Bee)
07-12-04 01:47
No 518790
       Synthesis of N-monomethylamino acids translated     

32. The synthesis of optically active N-monomethyl-amino-acids (1)

by P. Quitt, J. Hellerbach and K. Vogler (bumpy english by armageddon)
(7.XII.62)

During the last years, several naturally occuring peptide- and depsipeptide-antibiotics (containing unusual amino acids as building blocks) were discovered. Of these, the N-monomethylamino acids seem to have widespread occurence. For example, N-methyl-L-isoleucin was found in enniatin A (2), N-methyl-L-valin in enniatin B (2) and in actinomycins (3), N-methyl-L-leucin in sporidesmolid I (4), N,beta-dimethyl-L-leucin in Etamycin (3), N-methyl-L-phenylalanin and p-dimethylamino-N-methyl-L-phenylalanin in staphylomycin (6) or ostreogrycin (7) and finally N-methyl-L-phenylglycin in etamycin (5). Both actinomycin and etamycin contain also sarcosin.

Although the preparation of optically inactive or racemic methylamino acids doesn't present any problems, there is currently no satisfying synthesis of optically active methylamino acids. The common method consists in methylation of the tosyl derivatives, followed by cleavage of the tosyl group with sodium in ammonia or boiling hydrochloric acid.

This procedure, developed by FISCHER(8), usually gives partially racemized products (9), so that intermediate products have to be purified via salt formation with optically acitve bases (10). Especially during the methylation with dimethylsulfate or methyliodide (if it is desired to occur in good yield), significant racemization occurs. A tedious separation of the end products is necessary/highly recommended. Also invented by FISCHER(11) but later applied by COOK et al. (9) was the method of replacing bromine with methylamine on optically active alpha-bromo-fatty acids. But even when this method is used, the obtained products were strongly racemized, as we were able to confirm with own experiments.

In contrast to these, the reductive alkylation as performed by BOWMAN(12) on different amino acids using different aldehydes, proceeds without racemization. Although with higher aldehydes, only monoalkyl derivatives are obtained, the use of formaldehyde always results in dimethyl derivative formation(13) or - when only one equivalent of formaldehyde is used - a mixture of mono-, di- and unmethylated products, whereas the desired derivative is obtained only in 5-25% yield and its separation from side products is often very difficult to accomplish (14).

{it follows the reaction scheme:
"Benzaldehyd" is benzaldehyde - obvious...
"oder" means "or"..
"Eisessig" is GAA... (everything else should be self-explaining)}

Moreover, certain N-methylamino acids were made from actinomycines (15). The method described here dips into the principle of reductive alkylation by using benzaldehyde as the aldehyde compound (16). Like shown in the reaction scheme, this leads to a benzyl compound III, which can then be selectively monomethylated. The benzyl-methylamino acid IV, after hydrogenolytic debenzylation, finally gives the desired N-monomethylamino acid V. The benzylidene compounds of the amino acids II are only stable in their salt form and were first isolated by BERGMANN et al.(17) and later by WIELAND & SCHAEFER(18). They don't tend to racemize, a fact which was already observed before by GULLAND & MEAD(19) and by TAGUCHI & ISHIDA(20). Newly, benzaldehyde was also used to protect the epsilon-amino group of lysin (21), as it is easily spit off hydrolytically in acidic solutions.

Compound II isn't isolated, but reduced to the N-benzyl compound III in situ, either catalytically or with sodium borohydride. The isolation of N-benzyl amino acids is accomplished very easily because of their poor solubility (in water) at the isoelectric point {whatever this means!!}. The methylation of the benzyl compound III is done according to the method of LEUCKART & WALLACH (22). This method generally leads straight to the N-benzyl-N-methyl derivative IV which can be isolated - meanwhile, With basic and hydroxyl containing amino acids, side reactions are likely to occur. For example, partial decarbobenzoxylation occurs when N-carbobenzoxy-N-benzyl-L-lysin is treated with hot formic acid, which can lead to partial methylation of the epsilon-amino group. Therefore it is therefore necessary that minimal reaction times are met and that isolation of compound  IV isn't attempted. The same applies to the nitroarginin- and the serin derivative, as changes of unknown nature can happen to them as a result of too long reaction times. The kind of methylation procedure implies that after hydrogenolytic debenzylation has occured, the monomethylamino acid V appears in its salt-free form, even if compound IV cannot be isolated. In this last stage, it has to be considered that more hydrogenolysable protection groups can be removed from the molecule if present (Va, Vb). This involves for example the nitroarginin- and the N-carbobenzoxylysin derivative, with which unprotected methylamino acids are obtained without using sodium in liquid ammonia, contrasted to the N-tosyl derivative.

The specific rotations of the starting compounds, intermediates and end products are summarized in the table.

{table}



EXPERIMENTAL PART
1. N-benzyl-L-amino acids - Method A: 0.1 mol of the amino acid are dissolved in 50ml 2n NaOH soln. and 10.1ml (0.1 mol) freshly distilled benzaldehyde are added with good stirring. After 15-20 minutes, the solution has become homogenous. Then, 1.14g (0.03 mol) NaBH4 are added in small portions (alternatively, an aequous solution thereof is added dropwise). The temperature shouldn't exceed 15°C when doing this. After addition is finished, stirring is continued for 1/2 hour, and the procedure is repeated with fresh benzaldehyde and sodium borohydride. Stirring is then continued for 2 more hours before the mixture is washed 2x with ether and brought to pH 6-7 with 1n HCl with good stirring. The benzylamino acid usually precipitates rather quickly and is vacuum filtered, washed thoroughly with water and dried under vacuum. It is usually pure enough for the further reaction steps.




I put my comments into {braces} - I am not sure about the funky amino acid names, so I left them untouched....

Hope my translation is useful to you, java...

Greetz A
"..ein Trank von unterschiedlicher Farbe, in ihm ist Heilung für die Menschen." 		 
 

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