反应详情

The 4-hydroxymethyl-4-(4-fluorophenyl)cyclohexanone is dissolved in 50 ml. of pyridine and 30 ml. of acetic anhydride. After about 20 hours of standing at room temperature, the mixture is pured into ice and water. The gum that precipitates is extracted with ether. The organic layer is washed sucessively with water, 2.5 N hydrochloric acid, water, sodium bicarbonate solution and brine, and evaporated to dryness. The solid residue is recrystallized from ether to give 9.77 g. (57% yield) of 4-acetoxymethyl-4-(4-fluorophenyl)cyclohexanone, having a melting point of 80° to 84°C.

1. customThe gum that precipitates
2. extractionis extracted with ether
3. washThe organic layer is washed sucessively with water, 2.5 N hydrochloric acid, water, sodium bicarbonate solution and brine
4. customevaporated to dryness
5. customThe solid residue is recrystallized from ether
6. customto give 9.77 g