反应详情

Jones' reagent (from chromium trioxide, 4 g) was added dropwise with stirring to ethyl 4-hydroxy-6-methyl-2-heptynoate (9.5 g) in acetone (30 ml) in an ice bath, with the temperature being maintained at about 10°. After 0.5 hour the reaction was diluted with water (300 ml) and extracted with diethyl ether thrice. The organic phase was washed with brine, dried, and evaporated to give ethyl 6-methyl-4-oxo-2-heptynoate as an oil (7.0 g).

1. temperaturebeing maintained at about 10°
2. extractionextracted with diethyl ether thrice
3. washThe organic phase was washed with brine
4. customdried
5. customevaporated