反应详情

1-Chloro-4-(4-chlorophenyl)-2-butanone (110 g) was added portionwise over half an hour to a stirred suspension of imidazole (175 g) in dimethylformamide (150 ml) at 0° C. and the mixture stirred overnight at ambient temperature. The resulting solution was poured into water (1500 ml) with seeding at the first sign of turbidity, and the precipitate filtered off and washed well with water and hexane. Chromatography of the product on silica gel (1 Kg.), eluting with 7% methanol in methylene chloride gave 100 g of 1-[4-(4-chlorophenyl)butan-2-on-1-yl]imidazole.

1. filtrationthe precipitate filtered off
2. washwashed well with water and hexane
3. washChromatography of the product on silica gel (1 Kg.), eluting with 7% methanol in methylene chloride