反应详情

A solution of 2-(imidazol-1-yl)acetaldehyde (2.6 g; 0.0 18 mmol), 3-(4-fluorophenyl)-4-methoxycarbonylbenzyl triphenylphosphonium bromide (5.4 g; 0.09 mmol), potassium carbonate (1.38 g; 0.01 mmol) and 18 crown-6 (0.1 g; 0.37 mmol) in THF (150 ml) was stirred under argon atmosphere at ambient temperature overnight. After filtration of the insoluble material and evaporation to dryness, the residue was purified by flash chromatography eluting with a mixture of dichloromethane/ethanol (98/2) to give methyl 4-[3-(imidazol-1-yl)prop-1-en-1-yl]-2-(4-fluorophenyl)benzoate as a mixture of E and Z isomers. Yield: 93%

1. filtrationAfter filtration of the insoluble material and evaporation to dryness
2. customthe residue was purified by flash chromatography
3. washeluting with a mixture of dichloromethane/ethanol (98/2)