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Synthesis of novel quinoxaline-5-carboxylic acid derivatives

✍ Scribed by Brian E. Kornberg; Sham S. Nikam; Michael F. Rafferty

Publisher: Journal of Heterocyclic Chemistry
Year: 1999
Tongue: English
Weight: 510 KB
Volume: 36
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570360526

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✦ Synopsis

Abstract

This paper describes the synthesis of several new 2,3‐dimethoxy‐6‐methyl‐7‐nitro‐quinoxaline‐5‐carboxylic acid derivatives (13a‐m) via a multistep synthetic route from 5‐methyl‐1__H__‐benzo[d][1,3]oxazine‐2,4‐dione (1).

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## Abstract The synthesis of a new series of 5‐oxy‐pyrido[2,3‐__b__]quinoxaline‐9‐carboxamides **4a‐i** and __N__^1^,__N__^2^‐Bis(5‐oxy‐pyrido[2,3‐__b__]quinoxaline‐9‐benzoyl)ethylenediamine (**5**) is reported starting from 2‐chloro‐3‐nitropyri‐dine. Fundamental steps of the synthetic pathway are