反应详情

A 20% aqueous solution of methyl mercaptan sodium salt (12.0 g, 34 mmoles) and potassium hydroxide (4.2 g, 66 mmoles) were dissolved in ethanol (25 ml). To the resulting mixture was added dropwise 1-(4-chlorophenyl)-2,2,2-trichloroethanol (4.0 g, 15.5 mmoles) dissolved in ethanol (10 ml) under water-cooling, and the mixture was stirred at room temperature for one day. Water and diethyl ether were added to remove any ether-soluble materials. The aqueous layer was rendered acidic with dilute hydrochloric acid, extracted with ethyl acetate, washed with water and dried over anhydrous magnesium sulfate. After filtration, the filtrate was concentrated and purified by silica gel column chromatography to afford 2.1 g of α-methylthio-p-chlorophenylacetic acid. Yield 62%.

1. temperaturecooling
2. customto remove any ether-soluble materials
3. extractionextracted with ethyl acetate
4. washwashed with water
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationAfter filtration
7. concentrationthe filtrate was concentrated
8. custompurified by silica gel column chromatography