Condensation of sodium (3-oxocycloalkylidene)methenolate with several heterocyclic amines afforded pyrazolo[1,5-a]pyrimidine and
pyrazolo[1,5-a]quinazoline derivatives. Also, 2-(2-cycloalkylidenehydrazinyl)-4-substituted-5-(phenyldiazenyl)-thiazole derivatives were
synthesized via reaction of hydrazonoyl halides with 2-cycloalkylidene-hydrazinecarbothioamide. Structures of the newly synthesized
compounds were elucidated by elemental analysis, spectral data, alternative synthethic routes and chemical transformation whenver
possible.
Key words: hydrazonoyl halides; aminopyrazoles; pyrazolo[1,5-a]pyrimidines; pyrazolo[1,5-a]quinazolines; imidazo[1,2-a]cycloalka[e]pyrimidine; hydrazine-carbothioamide; arylazothiazoles
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