反应详情

A mixture of 4.3 g of 3-methyl-2-buten-1-ol and 8.1 g of ethyl orthoacetate was heated with stirring. The temperature was increased slowly from room temperature to 165° over 2 hours, during which 2.21 g of ethanol was collected. The temperature was maintained at 165° for 26 hours, during which time an additional 1.52 g of ethanol was collected. The reaction mixture was then allowed to cool and diluted with diethyl ether. The ether solution was washed successively with dilute hydrochloric acid, saturated aqueous sodium bicarbonate and saturated aqueous sodium chloride. The washed solution was dried over magnesium sulfate and distilled to give 4.03 g (52% yield) of ethyl 3,3-dimethyl-4-pentenoate, b.p. 80°-85°/52 mm.

1. temperaturewas heated
2. customwas collected
3. temperatureThe temperature was maintained at 165° for 26 hours, during which time an additional 1.52 g of ethanol
4. customwas collected
5. temperatureto cool
6. additiondiluted with diethyl ether
7. washThe ether solution was washed successively with dilute hydrochloric acid, saturated aqueous sodium bicarbonate and saturated aqueous sodium chloride
8. dry with materialThe washed solution was dried over magnesium sulfate
9. distillationdistilled