反应详情

5 ml of tetrahydrofuran, 129 mg (0.8 mmol) of 4-trifluoromethylphenol and 209 mg (0.8mmol) of triphenylphosphine are added, under nitrogen, to 280 mg (0.76 mmol) of 1-triphenylmethyl-4-(3-hydroxypropyl)-1H-imidazole. The resulting mixture is stirred for 5 min. 139 mg (0.8 mmol) of diethyl azodicarboxylate in 5 ml of tetrahydrofuran are then slowly added. Stirring is continued at room temperature for 3 hours under nitrogen. The solvent is then evaporated and the residue is then chromatographed on a column of silica gel (first eluent petroleum ether containing increasing amounts of diethyl ether up to 100%) to give the monohydrate of 1-triphenylmethyl-4-[3-(4-trifluoromethylphenoxy)propyl]-1H-imidazole which is crystallized from ethanol, M.p.: 150°-151° C.

1. stirringStirring
2. waitis continued at room temperature for 3 hours under nitrogen
3. customThe solvent is then evaporated
4. customthe residue is then chromatographed on a column of silica gel (first eluent petroleum ether containing increasing amounts of diethyl ether up to 100%)