Synthesis of benzo[6,7][1,4]diazepino[1,2-b]indazol-7(6H)-ones and benzo[f]pyrazolo[1,5-a][1,4]diazepin-4-ones via CuI/l-proline catalyzed intramolecular N2-arylation

Abstract Facile intramolecular N2-arylation catalyzed by CuI/ l -proline has been developed to prepare in good to excellent yields a variety of benzo[ f ]pyrazolo[1,5- a ][1,4]diazepin-4-ones and previously unreported benzo[6,7][1,4]diazepino[1,2- b ]indazol-7(6 H )-ones.