Abstract
Reactions of hydrazonoyl halides with cyanoacetic hydrazide and its N-arylidene derivatives proceeded site-selectively and afforded the respective pyrazolo[3,4-d]pyridazine and aldehyde N-(1-aryl-3-acetyl-4-cyanopyrazol-5-yl)hydrazone derivatives. The structures of the products were elucidated on the basis of their spectral and elemental analyses. The anti-aggressive activity of the compounds prepared was screened.