Regioselectivity in the Reactions of Bis-hydrazonoyl Halides with Pyrimidine-2-thiones

descriptionPublicationkeyboard_double_arrow_right Article 01 Jun 2001Publisher:Springer Science and Business Media LLCJournal:Monatshefte fuer Chemie/Chemical Monthly, volume 132, pages 715-720 (issn: 0026-9247,

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Authors: Ahmad S. Shawali; Rifaat H. Hilal; Said El-Sheikh;

doi: 10.1007/s007060170086

Regioselectivity in the Reactions of Bis-hydrazonoyl Halides with Pyrimidine-2-thiones

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Abstract

Bis-hydrazonoyl chlorides react regioselectively with pyrimidine-2-thiones, which contain a masked thiourea residue, to give the hitherto unknown annelated 2,3-bis-arylhydrazono-thiazoles and 3,3′-bis-1,2,4-triazoles. Reaction of bis-hydrazonoyl chlorides with 2-methylthio derivatives gave only 3,3′-bis-1,2,4-triazoles.

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Cairo University
Egypt

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