One‐Pot Synthesis of 2‐Aminobenzophenones from 2‐Alkynyl Arylazides Catalyzed by Pd and Cu Precursors

Abstract We describe a novel one‐pot three‐step reaction of 2‐alkynyl arylazides through palladium‐catalyzed formation of 3‐hydroxy‐3‐phenylindolin‐2‐ones followed by hydrolysis of amide bonds and copper‐catalyzed decarboxylation to give 2‐aminobenzophenones. This synthetic method works well with various 2‐alkynyl arylazides and affords the products in moderate to good yields under mild reaction conditions.