Issue 39, 2013

Ring expansion of alkynyl cyclopropanes to highly substituted cyclobutenes via a N-sulfonyl-1,2,3-triazole intermediate

Abstract

Regioselective ring expansion of alkynyl cyclopropanes to highly substituted cyclobutenes was developed. The reaction involves a copper-catalyzed cycloaddition of an alkyne with an arylsulfonyl azide and a silver-catalyzed carbene formation followed by ring expansion of a cyclopropyl carbene intermediate.

Graphical abstract: Ring expansion of alkynyl cyclopropanes to highly substituted cyclobutenes via a N-sulfonyl-1,2,3-triazole intermediate

Supplementary files

Article information

Article type
Communication
Submitted
27 Jun 2012
Accepted
23 Jul 2012
First published
24 Jul 2012

Chem. Commun., 2013,49, 4376-4378

Ring expansion of alkynyl cyclopropanes to highly substituted cyclobutenes via a N-sulfonyl-1,2,3-triazole intermediate

R. Liu, M. Zhang, G. Winston-McPherson and W. Tang, Chem. Commun., 2013, 49, 4376 DOI: 10.1039/C2CC34609E

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