反应详情

To a solution of 25 parts of 1-(phenylmethyl)-4-piperidineacetonitrile in 178 parts of tetrahydrofuran were added dropwise 37.97 parts of ethyl chloroformate at room temperature. The reaction mixture was stirred for 15 hours at room temperature and was then evaporated. The residue was taken up in 90 parts of ethyl acetate and the whole was washed successively with HCl 3N, NaHCO3 and NaCl (sat.). The solvent was evaporated and the residue was distilled (100°-110° C./6.7 Pa), yielding 18.7 parts (81.4%) of ethyl 4-(cyanomethyl)-1-piperidinecarboxylate (interm. 24).

1. customwas then evaporated
2. washthe whole was washed successively with HCl 3N, NaHCO3 and NaCl (sat.)
3. customThe solvent was evaporated
4. distillationthe residue was distilled (100°-110° C./6.7 Pa)