New synthesis of 11??acyl??5, 11??dihydro??6H??pyrido [2, 3??b][1, 4]??benzodiazepin??6??ones and related studies

…, G Comisso, E Decorte, T Fajdiga…

Index: Kovac, T.; Oklobdzija, M.; Comisso, G.; Decorte, E.; Fajdiga, T.; et al. Journal of Heterocyclic Chemistry, 1983 , vol. 20, p. 1339 - 1349

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Citation Number: 17

Abstract

Abstract New synthesis of 11-acyl-5, 11-dihydro-6H-pyrido [2, 3-b][1, 4] benzodiazepin-6- ones (42-44) is reported. The crucial steps (Scheme VI) represented N-oxydation of 1 (1A) to 35 (35A), facilitated ring-closure of 36 into 37, its subsequent N-α-chloroacetylation to 38, aminolysis to 39-41 (involving NO anchimeric assistance as depicted in 38A) and deoxygenation to 42-44 (Scheme VII). The central intermediate 37 is also obtained on ...