反应详情

A solution of 10.0 g of 1-[(benzyloxy)-methyl]imidazole in 50 ml of acetonitrile is added dropwise within 10 minutes while cooling with ice to a solution of 13.0 g of 3,4-dimethoxy-5-nitrobenzoyl chloride and 5.4 g of triethylamine in 80 ml of acetonitrile so that the temperature does not exceed 25°. The mixture is subsequently stirred for an additional 3 hours, whereupon the solvent is distilled. After treatment with water, the mixture is extracted with ethyl acetate. After two-fold washing with water, the organic phase is dried over sodium sulfate and evaporated. The resulting oil is chromatographed on 600 g of silica gel with toluene/ethyl acetate (95:5). There is obtained 1-[(benzyloxy)methyl]imidazol-2-yl (3,4-dimethoxy-5-nitrophenyl) ketone as a yellowish oil

1. customdoes not exceed 25°
2. distillationis distilled
3. extractionAfter treatment with water, the mixture is extracted with ethyl acetate
4. dry with materialAfter two-fold washing with water, the organic phase is dried over sodium sulfate
5. customevaporated
6. customThe resulting oil is chromatographed on 600 g of silica gel with toluene/ethyl acetate (95:5)