Convenient synthesis of 3??arylazopyrazoles and 2??arylazo??1, 3, 4?螃?2??thiadiazoline derivatives from 3??nitroformazans

AO Abdelhamid, IM Abbas, MA Abdallah…

Index: Abdelhamid, Abdou O.; Abbas, Ikhlass M.; Abdallah, Magda A.; Fahmi, Abdelgawad A.; Shawali, Ahmad S. Journal of Heterocyclic Chemistry, 1985 , vol. 22, p. 813 - 816

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Citation Number: 13

Abstract

Abstract Reactions of 3-nitro-1, 5-diarylformazans 1a-c with carbanions of acetylacetone, dibenzoylmethane, aceto-acetanilide, benzoylacetonitrile, ω-benzenesulfonylacetophenone and malononitrile yielded the corresponding 3-arylazopyrazole derivatives 4-9 respectively. Reactions of 1 with nucleophiles result in displacement of the nitro group and the formation of the corresponding 3-substituted formazans 10-13. Treatment of 1 with potassium ...