Copper‐Catalyzed Domino C−C Bond Cleavage of 2,3‐Unsubstituted Indoles/Indolines and Oxindoles via Oxidation and Directed Insertion of 2‐Aminopyridines: Direct Access to Quinazolinediones

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Copper‐catalyzed domino C−C bond cleavage of 2,3‐unsubstituted Indole/Indolines and Oxindoles through oxygenation followed by insertion of 2‐aminopyridine has been described. This method implies the formation of two new C−N and C−O bonds using molecular oxygen as a sole oxidant for construction of highly valuable Quinazoline‐2,4(1H,3H)‐dione derivatives from readily available substrates. magnified image