Synthesis of pyrazolo [3, 4-d] pyridazine, pyrazolo [3, 4-d] pyrimidine and imidazo [1, 2-a] pyridine derivatives using hydrazonyl bromides

HM Hassaneen, AS Shawali, NM Elwan…

Index: Hassaneen, Hamdi M.; Shawali, Ahmad S.; Elwan, Nehal M.; Abounada, Nada M. Organic Preparations and Procedures International, 1992 , vol. 24, # 2 p. 171 - 175

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Citation Number: 20

Abstract

Although hydrazonyl bromides are interesting intermediates for heterocyclic synthesis,'very little attention was paid to the utility of hydrazonyl halides in the synthesis of the title compounds? This paper describes the utility of hydrazonyl bromides in the synthesis of pyrazolo [3, 4d] pyridazine, pyrazolo [3, 4-d] pyrimidine and imidazo [l, 2-a] pyridine. For this purpose, we studied the reaction of hydrazonyl bromides (la-c) with the sodium salt of ...