反应详情

500 mg of 3-formyl-pyrrole were dissolved in 10 ml of tetrahydrofuran and then, at +20° C., 227 mg of sodium hydride dispersed at 55% in vaseline oil were added all at once. Gas evolved and after stirring for 15 minutes, a solution of 0.58 ml of benzoyl chloride in 2 ml of tetrahydrofuran was introduced dropwise at +5° C. The mixture was stirred for 2 hours at 20° C. and diluted with water. Extracting with ether, concentrating to dryness by distillation under reduced pressure and chromatographing the residue over silica and eluting with a mixture of hexane and ethyl acetate (7-3) yielded 558 mg of 1-benzoyl-3-formyl-pyrrole.

1. additionwere added all at once
2. stirringThe mixture was stirred for 2 hours at 20° C.
3. extractionExtracting with ether
4. concentrationconcentrating to dryness by distillation under reduced pressure and chromatographing the residue over silica
5. washeluting with a mixture of hexane and ethyl acetate (7-3)