Zn. Huang et Zm. Li, SYNTHESIS OF 5-MERCAPTOALKYLAMINO-1,2,4-TRIAZOLES AND 5-ANILINOALKYLTHIOPYRAZOLYL-1,2,4-TRIAZOLES BY RING-CHAIN TRANSFORMATION, Heterocycles, 41(8), 1995, pp. 1653-1658
Cyclic alpha-oxo-alpha-(1,2, 4-triazol-1-yl)ketene N,S-acetals (1a-d)
and (4a-d) react with hydrazine by a ring chain transformation affordi
ng title compounds (3a-d, 6a-d and 6'a-d).