Conversion of 4,6‐disubstituted pyrimidines into 1,2,4‐Triazoles by action of Hydrazine
- 1 January 1970
- journal article
- research article
- Published by Wiley in Recueil des Travaux Chimiques des Pays-Bas
- Vol. 89 (7) , 680-686
- https://doi.org/10.1002/recl.19700890703
Abstract
4,6‐Diethoxy‐, 4‐ethoxy‐6‐hydrazino‐, 4,6‐dichloro‐, 4,6‐di(methylthio)‐and 4,6‐dihydrazinopyrimidine react with aqueous hydrazine at 210° to give 3‐methyl‐1,2,4‐triazole. Evidence is presented that in this unprecedented ring contraction reaction the C(2)‐N(3 or 1)‐C(4 or 6)‐C(5) fragment of the pyrimidine ring is involved in the formation of this 1,2,4‐triazole.Keywords
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