Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Reactions of α-Polyhalo Ketone Tosylhydrazones with Sulfide Ion and Primary Amines. Cyclization to 1,2,3-Thiadiazoles and 1,2,3-Triazoles
Kunikazu SakaiNobuko HidaKiyosi Kondo
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1986 Volume 59 Issue 1 Pages 179-183

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Abstract

Trichloroacetaldehyde tosylhydrazone acts as an excellent precursor of diazodithioacetate which is generated by treatment of the hydrazone with sulfide ion. This spontaneously cyclizes it to 5-mercapto-1,2,3-thiadiazole. The precursor also gives a 5-amino-1,2,3-triazole on reaction with an amine. α,α-Dichloro ketone tosylhydrazones similarly cyclize to give 1,2,3-thiadiazoles and 1,2,3-triazoles.

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