反应详情

To a mixed liquid of 5.00 g of methyl 5-formylthiophene-3-carboxylate and 50 ml of THF was added 0.67 g of sodium borohydride under ice-cooling. To the reaction solution was added dropwise 5 ml of methanol, followed by stirring for 1 hour under ice-cooling. The reaction solution was added with 1 M hydrochloric acid, extracted with ethyl acetate, and washed with a saturated aqueous sodium hydrogen carbonate solution and a saturated aqueous sodium chloride solution. The organic layer was dried over anhydrous magnesium sulfate and the solvent was then evaporated to obtain 4.86 g of methyl 5-(hydroxymethyl)thiophene-3-carboxylate as a pale yellow oily substance.

1. temperaturecooling
2. temperaturecooling
3. extractionextracted with ethyl acetate
4. washwashed with a saturated aqueous sodium hydrogen carbonate solution
5. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
6. customthe solvent was then evaporated