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All 2 posts Subject: Extraction of L-Dopa from Velvet Beans Please login to post Down

Pimpo
(Newbee)
11-21-03 15:22
No 472258
      Extraction of L-Dopa from Velvet Beans
(Rated as: good read)

I'm not sure if this stuff qualifies for 'psychoactive', but might still be of interest for some bees. I got the following from the second of two books called 'Pharmaceutical Manufacturing Encyclopedia' by Marshall Sittig, Noyes Publications:

Manufacturing Process:

A charge of 1,000 g of ground velvet beans was extracted with 9 liters 1% aqueous acetic acid at room temperature over a 20-hour period with occasional stirring during the first 4 hours. The liqour was decanted and the bean pulp slurry was vacuum filtered through a cake of acid-washed diatomaceous earth in a Buechner funnel. The decanted liquor was combined with the filtrate and concentrated under vacuum and a nitrogen atmosphere to a volume of 900 ml. After treating with acid-washed activated carbon, the concentrate was then filtered through acid-washed diatomaceous earth.

After concentrating the filtrate to approximatelly 400 ml, solids started crystallizing out at which time the filtrate was cooled by refrigerating at 5 °C for several hours. Filtration gave 18.7 g, mp 284 ° to 286 °C (dec.); [a]D 8.81 ° (1 % solution in aqueous 4 % HCl). The infrared spectrum and paper chromatography indicated very good L-Dopa according to U.S. Patent 3,253,023

Various synthetic routes are also described by Kleeman & Engel

Dextrose
(Hive Bee)
11-27-03 22:15
No 473512
      SWIM suppose this method could also be used in

SWIM suppose this method could also be used in isolating L-5-HTP from Griffonia Simplicifolia ?

...As far as SWIM remembers, Mucuna Pruriens also contains n,n-DMT and other tryptamines, besides L-DOPA.

Make Drugs - Not War!

The World needs Acid!

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	All 2 posts		Subject: Extraction of L-Dopa from Velvet Beans		Please login to post		Down


		Pimpo (Newbee) 11-21-03 15:22 No 472258				Extraction of L-Dopa from Velvet Beans (Rated as: good read)
						I'm not sure if this stuff qualifies for 'psychoactive', but might still be of interest for some bees. I got the following from the second of two books called 'Pharmaceutical Manufacturing Encyclopedia' by Marshall Sittig, Noyes Publications: Manufacturing Process: A charge of 1,000 g of ground velvet beans was extracted with 9 liters 1% aqueous acetic acid at room temperature over a 20-hour period with occasional stirring during the first 4 hours. The liqour was decanted and the bean pulp slurry was vacuum filtered through a cake of acid-washed diatomaceous earth in a Buechner funnel. The decanted liquor was combined with the filtrate and concentrated under vacuum and a nitrogen atmosphere to a volume of 900 ml. After treating with acid-washed activated carbon, the concentrate was then filtered through acid-washed diatomaceous earth. After concentrating the filtrate to approximatelly 400 ml, solids started crystallizing out at which time the filtrate was cooled by refrigerating at 5 °C for several hours. Filtration gave 18.7 g, mp 284 ° to 286 °C (dec.); [a]D 8.81 ° (1 % solution in aqueous 4 % HCl). The infrared spectrum and paper chromatography indicated very good L-Dopa according to U.S. Patent 3,253,023 Various synthetic routes are also described by Kleeman & Engel



		Dextrose (Hive Bee) 11-27-03 22:15 No 473512				SWIM suppose this method could also be used in
						SWIM suppose this method could also be used in isolating L-5-HTP from Griffonia Simplicifolia ? ...As far as SWIM remembers, Mucuna Pruriens also contains n,n-DMT and other tryptamines, besides L-DOPA. Make Drugs - Not War! The World needs Acid!

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