反应详情

5.37 g 1H-Benzotriazole were dissolved in 10.9 ml thionyl chloride. The solution was diluted with dichloromethane to a total volume of 100 ml to obtain a 1.5 M solution of thionylchloride and 1H-Benzotriazole. 600 mg [4-(4-Trifluoromethyl-phenoxy)-phenyl]-methanol were dissolved in 50 ml dichloromethane. 1.86 ml of the above 1.5 M solution of thionylchloride and 1H-Benzotriazole were added. The reaction mixture was stirred at room temperature for three hours. The precipitate was filtered off through a pad of Na2SO4. The filtrate was evaporated in vacuo and the residue purified by flash chromatography on silica gel with the eluents n-heptane:ethyl acetate=1:2=>1:1 to obtain 613 mg 1-Chloromethyl-4-(4-Trifluoromethyl-phenoxy)-benzene.

1. filtrationThe precipitate was filtered off through a pad of Na2SO4
2. customThe filtrate was evaporated in vacuo
3. customthe residue purified by flash chromatography on silica gel with the eluents n-heptane