反应详情

To a mixed liquid of 4.86 g of methyl 5-(hydroxymethyl)thiophene-3-carboxylate and 50 ml of dichloromethane was added 4.12 ml of thionyl chloride under ice-cooling, followed by stirring at room temperature for 15 hours. The reaction solution was concentrated, added with ethyl acetate, and then washed with a saturated aqueous sodium hydrogen carbonate solution and a saturated aqueous sodium chloride solution. After drying over anhydrous magnesium sulfate, the solvent was then evaporated to obtain 4.90 g of methyl 5-(chloromethyl)thiophene-3-carboxylate as a pale yellow oily substance.

1. temperaturecooling
2. concentrationThe reaction solution was concentrated
3. additionadded with ethyl acetate
4. washwashed with a saturated aqueous sodium hydrogen carbonate solution
5. dry with materialAfter drying over anhydrous magnesium sulfate
6. customthe solvent was then evaporated