反应详情

A mixture of ethyl 3-(6-methyl-3-pyridyl)propionate (1.31 g) and ethyl formate (7.43 g) was added dropwise to a stirred suspension of sodium hydride (50% dispersion in oil, 4.07 g) in dry 1,2-dimethoxyethane (24 ml) maintained at 0°. The mixture was allowed to warm to room temperature, stirred overnight and poured into ice-water (300 g). The mixture was extracted with ether, the aqueous phase was adjusted to pH 5.4 with hydrochloric acid, and the solid which separated was collected to give ethyl 2-formyl-3-(6-methyl-3-pyridyl)propionate (10.5 g, 70%), m.p. 142°-4°.

1. temperaturemaintained at 0°
2. extractionThe mixture was extracted with ether
3. customthe solid which separated
4. customwas collected