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New many fold 1,2,3-selenadiazole aromatic derivatives

✍ Scribed by Mousa Al-Smadi; Samer Ratrout

Book ID
102342928
Publisher
Journal of Heterocyclic Chemistry
Year
2004
Tongue
English
Weight
56 KB
Volume
41
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

The many fold aromatic ketones 2a‐d are versatile compounds for the synthesis of the many fold 1,2,3‐selenadiazole aromatic derivatives 5a‐d. The preparation starts with the reaction between the many fold bromomethylene benzene derivatives 1a‐d and 4‐hydroxyacetophenone, which are transformed through the reaction with semicarbazide hydrochloride or ethylhydrazine carboxylate into the corresponding semicarbazones derivatives 3a‐d or hydrazones 4a‐d. The reaction with selenium dioxide leads to regiospecific ring closure of semicarbazones or hydrazones to give the many fold 1,2,3‐selenadiazole aromatic derivatives in high yield.

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