The polarity reversible nature of azomethine imines as the crucial transformation enables the tandem Michael addition/imine isomerization/[3+2] cycloaddition to proceed under mild, transition-metal-free conditions to form cyclohepta[b]pyrroles in a single operation starting from readily available acyclic precursors with a broad substrate scope.
![Graphical abstract: Tandem Michael addition/imine isomerization/intramolecular [3+2] cycloaddition for the regiospecific synthesis of cyclohepta[b]pyrroles](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C4CC04665J&imageInfo.ImageIdentifier.Year=2014)
Y. Zhang, L. Pan, X. Xu, H. Luo and Q. Liu, Chem. Commun., 2014, 50, 11039 DOI: 10.1039/C4CC04665J
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