1988 Volume 36 Issue 6 Pages 2248-2252
The palladium-catalyzed coupling reaction of 3-iodoindoles possessing an electron-withdrawing group at the 1- or 2-position with terminal acetylenes smoothly proceeded to yield 3-ethynylindoles. Similarly, the reaction of 3-iodobenzo[b]thiophene gave the expected products, but the reaction of 3-bromobenzo[b]furan provided resinous materials.