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Synthesis and Tautomeric Structure of Tris(arylazo) Derivatives of Novel 1H-Bis-imidazo[1,2-b:2 ',1 '-e]pyrazole Ring System
Journal article   Peer reviewed

Synthesis and Tautomeric Structure of Tris(arylazo) Derivatives of Novel 1H-Bis-imidazo[1,2-b:2 ',1 '-e]pyrazole Ring System

Ahmad Sami Shawali, Thoraya A. Farghaly, Mohamed R. Shehata and Shadia M. Hussein
Journal of heterocyclic chemistry, Vol.52(2), pp.545-550
03/2015
DOI: https://doi.org/10.1002/jhet.2096

Abstract

Chemistry Chemistry, Organic Physical Sciences Science & Technology
An efficient and convenient synthesis of tris(arylazo) derivatives of novel heterocyclic ring system, namely, 1H-bis-imidazo[1,2-b:2,1-e]pyrazole, is described. The structures of the compounds prepared and their tautomeric structure were elucidated on the basis of their elemental analyses and spectral data in addition to correlation of their acidity constants by Hammett equation. The mechanism of the studied reactions and their site selectivity are discussed.

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