Access to Cyclobutadienes via an Organocatalytic Dienamine–Iminium–Allenamine Cascade Approach
journal contributionposted on 01.09.2017, 00:00 by Wenjun Li, Ming Lang, Jian Wang
A new organocatalytic route to cyclobutadienes from α,β-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.