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Derivatives of pyrido[2,3-b][1,4]diazepine and of the dipyrido[1,2-a:2′,3′-b]imidazole heterocyclic system

✍ Scribed by Francesco Savelli; Alessandro Boido; Sonia Piacente

Publisher
Journal of Heterocyclic Chemistry
Year
2001
Tongue
English
Weight
36 KB
Volume
38
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

With a continuing interest in heteropolycyclic systems which may show biological activities, we studied the reaction of 3‐amino‐2‐(methylamino)pyridine with diethyl 1,3‐acetonedicarboxylate in order to develop pyridodiazepinone derivatives. From the reaction mixture, we separated dipyrido[1,2‐a:2′,3′‐d]imidazole derivatives (3 and 4) besides two isomeric pyrido[2,3‐b][1,4]diazepine derivatives (5 and 6) in which the complex structural differentiation was achieved through nmr experiments and chemical evidence. Several attempts to elaborate isomers 5 and 6 have not yet given significant results.

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