3 years ago
Access to Cyclobutadienes via an Organocatalytic Dienamine–Iminium–Allenamine Cascade Approach
Ming Lang, Wenjun Li, 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.
Publisher URL: http://dx.doi.org/10.1021/acs.orglett.7b02161
DOI: 10.1021/acs.orglett.7b02161
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