Access to Cyclobutadienes via an Organocatalytic Dienamine-Iminium-Allenamine Cascade Approach

作者:Li Wenjun; Lang Ming; Wang Jian*
来源:Organic Letters, 2017, 19(17): 4564-4567.
DOI:10.1021/acs.orglett.7b02161

摘要

A new organocatalytic route to cyclobutadienes from alpha,beta-unsaturated aldehydes and ynals is described. This protocol allows a broad substrate scope and mild conditions. Furthermore, a proposed mechanism of a dienamine-iminium-allenamine cascade process is discussed.