Recent Progress on the Synthesis of (Aza)indoles through Oxidative Alkyne Annulation Reactions

The oxidative [3+2] cycloaddition of alkynes with arylamines is a powerful method for the synthesis of (aza) indoles because it employs unfunctionalized and easily available materials. Herein, recent progress in the synthesis of (aza) indoles through transition metal-catalyzed oxidative [3+2] cycloaddition is highlighted. 1 Introduction 2 Second-Row Transition-Metal Catalysts 3 First-Row Transition-Metal Catalysts 4 Summary