4-(Trihydro-2H-1,2-thiazole-

4-thiadiazolylsteroids were synthesized from the appropriate hydrazonoyl halides and alkyl carbodithioates containing steroid moiety. The newlysynthesized compounds were elucidated by elemental analysis, spectral data, and alternative synthetic route whenever possible.

Pyrazolo[5,1- a]pyrimidines and pyrazolo[5,1-c][1,2,4]triazines containing benzooxazole moiety are synthesised from N-[3-amino-4-(benzoxazol-2-yl)pyrazol-5-yl]phenylamine or its diazonium chloride with the appropriate active methylene compounds. The newly synthesised compounds were elucidated by elemental analysis, spectral data and alternative synthetic route whenever possible.

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