反应详情

A toluene (12 ml) solution of (R)-2,2-difluoro-hexahydro-5,5-dimethylindolizin-7(1H)-one (487.8 mg, 2.4 mmol) and (S)-1-phenylethylamine (306 μL, 2.4 mmol) was heated under reflux in a flask equipped with a Dean-Stark distillation receiver. After 22 hours, most solvent was distilled off through Dean-Stark distillation receiver, and remaining solvent was removed in vacuo. Compound (1S)—N—((R)-2,2-difluoro-hexahydro-5,5-dimethylindolizin-7(1H)-ylidene)-1-phenylethanamine was obtained as a brown oil and was used directly in next reaction.

1. temperatureunder reflux in a flask
2. customequipped with a Dean-Stark distillation receiver
3. distillationmost solvent was distilled off through Dean-Stark distillation receiver
4. customwas removed in vacuo