Enamine und Amide 3-substituierter Pyridinderivate
作者:K. M. Naef、H. Schaltegger
DOI:10.1002/hlca.19620450331
日期:——
Tertiary enamines of β-(3-pyridyl)-β-oxo-propionic ester, not attainable by the normal route, are prepared using β-(3-pyridyl)-β-chloro-acrylic ester as an intermediate. The direct reaction of β-(3-pyridyl)-β-oxo-propionic ester with secondary amines yields the corresponding β-keto-amines. 3-(1-Chlorovinyl)-pyridin by reaction with piperidin yields no enamine but 1-(3-pyridyl)-1,2-dipiperidino-ethane