Copper(I)‐Catalyzed Regioselective Chan‐Lam <i>N</i>2‐Vinylation of 1,2,3‐Triazoles and Tetrazoles

Abstract

Abstract Copper‐catalyzed coupling of π‐deficient NH‐azoles with vinylboronic acids or vinyltrifluoroborate salt provides a direct route to N2 ‐vinyl‐1,2,3‐triazoles and N2 ‐vinyltetrazoles. The coupling reaction is efficiently catalyzed by (phen)Cu(PPh 3 )Br with low catalyst loading (5 mol%) under base‐free conditions. The method is applicable for vinylation of unsubstituted, monosubstituted, and disubstituted 1,2,3‐triazoles with various functionalities with high N2 ‐selectivity. magnified image