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

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journal contribution
posted on 01.09.2017 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.

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