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An alternate approach for the synthesis of 2-substituted-arylimidazo[4,5-b]pyridines and their anti-bacterial activity

✍ Scribed by Vinodkumar Ramanatham; Murugulla Adharvana Chari; Pramod Kumar Dubey

Book ID
102340258
Publisher
Journal of Heterocyclic Chemistry
Year
2007
Tongue
English
Weight
360 KB
Volume
44
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

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An alternate method for the convenient preparation of the imidazo[4,5‐b]pyridines from 2,3‐pyridinediamine and 2‐aryl‐3(1)‐benzoxazine‐4__H__‐one has been illustrated. The mechanistic pathway for the formation of the product 4 has been proposed. All the compounds prepared herein were screened for their anti‐ bacterial properties.

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## Abstract Recyclization of quinoxalines and aza‐analogues (I) in the presence of o‐phenylenediamines (II) or (V) proceeds smoothly in acidic solution to give 2‐quinoxalinylbenzimidazoles and aza‐analogues (III) and (VI)/(VII), respectively.