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
摘要:
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(6H)-ones. (C) 2015 Elsevier Ltd. All rights reserved.