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All posts Subject: K2S2O8 oxidation of o/m-cresol to toluhydrochinone Please login to post

psyloxy
(Hive Addict)
05-08-04 13:25
No 505784
User Picture K2S2O8 oxidation of o/m-cresol to toluhydrochinone
(Rated as: good read)

Patent DE81068

preparation of hydrochinone

3kg potassium persulfate are gradually introduced Into a solution of 1.2kg phenol and 2.5kg NaOH in 75Kg H₂O. The mixture is left alone for 1 to 2 days at room temp or 40°C. After the rxn is over carbonic acid is introduced, the unreacted phenol is removed by steam distillation, the remainder is boiled with dilute HCl or H₂SO₄ and the hydrochinone extracted with Et₂O.

preparation of toluhydrochinone

If equivalent amounts of ortho- or meta-cresol are treated as above an oily residuum remains, which, when recrystallized from benzene, gives toluhydrochinone with a mp of 124°C

--psyloxy--

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	All posts		Subject: K2S2O8 oxidation of o/m-cresol to toluhydrochinone		Please login to post


		psyloxy (Hive Addict) 05-08-04 13:25 No 505784				K2S2O8 oxidation of o/m-cresol to toluhydrochinone (Rated as: good read)
						Patent DE81068 preparation of hydrochinone 3kg potassium persulfate are gradually introduced Into a solution of 1.2kg phenol and 2.5kg NaOH in 75Kg H₂O. The mixture is left alone for 1 to 2 days at room temp or 40°C. After the rxn is over carbonic acid is introduced, the unreacted phenol is removed by steam distillation, the remainder is boiled with dilute HCl or H₂SO₄ and the hydrochinone extracted with Et₂O. preparation of toluhydrochinone If equivalent amounts of ortho- or meta-cresol are treated as above an oily residuum remains, which, when recrystallized from benzene, gives toluhydrochinone with a mp of 124°C --psyloxy--

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