α-C–H/N–H Annulation of Alicyclic Amines via Transient Imines: Preparation of Polycyclic Lactams
作者:Weijie Chen、Daniel Seidel
DOI:10.1021/acs.orglett.1c01125
日期:2021.5.7
Polycyclic lactams are prepared in a single operation from o-toluamides and cyclic amines in a process that involves transient cyclic imines, species that are conveniently obtained in situ from the corresponding lithium amides and simple ketone oxidants. Imines thus generated, such as 1-pyrroline and 1-piperideine, engage lithiated o-toluamides in a facile annulation process. Undesired side reactions