反应详情

A solution of (4-mercapto-phenyl)-acetic acid (1.00 g, 5.94 mmol) in methanol (10 mL) was treated with a catalytic amount of concentrated sulfuric acid (2 drops). The reaction was heated under reflux for 2 h. At this time, the reaction mixture was concentrated in vacuo. The residue was re-dissolved in chloroform and washed with a saturated aqueous sodium bicarbonate solution. The organic layer was dried over magnesium sulfate, filtered, and concentrated in vacuo to afford (4-mercapto-phenyl)-acetic acid methyl ester (1.04 g, 96%) as a colorless oil: EI-HRMS m/e calcd for C9H10O2S (M+) 182.0402, found 182.0405.

1. temperatureThe reaction was heated
2. temperatureunder reflux for 2 h
3. concentrationAt this time, the reaction mixture was concentrated in vacuo
4. dissolutionThe residue was re-dissolved in chloroform
5. washwashed with a saturated aqueous sodium bicarbonate solution
6. dry with materialThe organic layer was dried over magnesium sulfate
7. filtrationfiltered
8. concentrationconcentrated in vacuo