Abstract: Twenty three novel heterocyclic compounds with the following general formula as Follows:R:C₆H₅,4-ClC₆H₄,4-CH₃OC₆H₄,4-CH₃C₆H₄,4-BrC₆H₄,t-C₄H₉;R₁:SCH₃,NHAr'(Ar′:4-CH₃C₆H₁,2-CH₃OC₆H₁,4-ClC₆H₄):R²:C₆N₅.have been prepared with α-oxo-α-(1,2,4-triazol-1-yl)ketene dithioacetals as intermediates,and their structures were proved by elementary analyses and spectral methods.Preliminary bioassay show that some of these compounds have plant-regulatory activities.

Key words: Synthesis, 1-(Substituted pyrazol-4-yl)-1,2,4-triazole, Biological activities