Synthesis of indol-3-yl-benzofurans and carbazoles via Cu(OTf)₂-catalyzed [3 + 2] and [4 + 2] cycloaddition

Abstract

Substrate guided synthesis to access indole tethered benzofurans and carbazole scaffolds through a [3 + 2] & [4 + 2] cycloaddition protocol catalyzed by Cu(OTf)2.