反应详情

A mixture of 2-[1-(ethoxyimino)propyl]-3-hydroxy-5-mesitylcyclohex-2-en-1-one (2.4 g), anhydrous methyl ethyl ketone (25 ml) and anhydrous potassium carbonate (1.65 g) was treated dropwise, with stirring, with benzoyl chloride (1.12 g). The mixture was heated under reflux with stirring for a period of 30 minutes and then filtered. The residue was washed with diethyl ether and the solvent from the combined filtrate and washings was evaporated under reduced pressure. The residue was taken up in ethyl acetate and the solution was washed twice with water, dried, and the solvent was evaporated under reduced pressure to give a dark brown oil. The oil was purified by chromatography on preparative thin layer chromatography plates (silica gel; eluent hexane/diethyl ether 75:25) to give 3-benzoyloxy-2-[1-(ethoxyimino)propyl]-5-mesitylcyclohex-2-en-1-one (1.9 g).

1. additionwas treated dropwise
2. temperatureThe mixture was heated
3. temperatureunder reflux
4. filtrationfiltered
5. washThe residue was washed with diethyl ether
6. customthe solvent from the combined filtrate and washings was evaporated under reduced pressure
7. washthe solution was washed twice with water
8. customdried
9. customthe solvent was evaporated under reduced pressure
10. customto give a dark brown oil
11. customThe oil was purified by chromatography on preparative thin layer chromatography plates (silica gel; eluent hexane/diethyl ether 75:25)