Water → HCID 53945920, compound

Participants

Reaction Steps

Into 30 ml of methylene chloride were dissolved 1.17 g of methyl ester of 8-methylthio-1,2,3,4-tetrahydro-2-trifluoromethylquinoline-6-acetic acid, and the mixture was stirred under cooling with ice. To this were added 870 mg of m-chloroperbenzoic acid and 336 mg of sodium hydrogen-carbonate, and the mixture was stirred for 1 hours. Water was added and the reaction mixture was extracted with methylene chloride, which was washed with saturated aqueous sodium bicarbonate, with water and with saturated saline solution and then dried over anhydrous sodium sulfate. Solvent was distilled off and the residue was purified by means of silica gel chromatography (development solvent; ethyl acetate:hexane=1:1) to obtain 620m g of dia-stereoisomer A and 300 mg of diastereoisomer B of methyl 8-methylsulfinyl-1,2,3,4-tetrahydro-2-trifluoromethylquinoline-6-acetate as white crystals. Moreover, 180 mg of methyl ester of 8-methylsulfonyl-1,2,3,4-tetrahydro-2-trifluoromethylquinoline-6-acetic acid were obtained as white crystals.

Provenance & Evidence