Copper(i)-catalyzed cycloaddition of silver acetylides and azides: Incorporation of volatile acetylenes into the triazole core†
Ilaria Proietti Silvestri,Fikre Andemarian,George N. Khairallah,Su Wan Yap,Tim Quach,Sammi Tsegay,Craig M. Williams,Richard A. J. O'Hair,Paul S. Donnelly,Spencer J. Williams
Organic & Biomolecular Chemistry Pub Date : 06/03/2011 00:00:00 , DOI:10.1039/C1OB05360D
Abstract

Silver acetylides and organic azides react under copper(I) catalysis to afford 1,4-disubstituted 1,2,3-triazoles. Mechanistic studies implicate a process involving transmetallation to copper acetylides prior to cycloaddition. This work demonstrates that silver acetylides serve as suitable precursors for entry into copper-mediated coupling reactions. This methodology allows the incorporation of volatile and difficult-to-handle acetylenes into the triazole core.

Graphical abstract: Copper(i)-catalyzed cycloaddition of silver acetylides and azides: Incorporation of volatile acetylenes into the triazole core