eng Ansari Education and Research Society Journal of Ultra Chemistry 0973-3450 2319-8036 December 2008 4 2 271 278 juc 740 article F.A. Yassin 1 Chemistry Department, Faculty of Science Zagazig University, Zagazig (EGYPT) <p>Reaction of 3-hydrazino-4,5,6-triphenyl pyridazine 3 with phenacyl bromide afforded triazolopyridazine 4, while, reaction of 3 with different aldehydes gave the corresponding 3-arylidinhydrazinopyridazine derivatives 5a-c which on reaction with Br₂/Na₂CO₃ gave the corresponding triazinopy-ridazines 6a-c. Also, fusion of 3 with ethyl acetoacetate, ethyl benzoylacetate, diethyl malonate and/or ethyl phenyl acetoacetate gave the corresponding pyrazolo and triazinopyridazine derivatives 10, 11, 12 and 13 respectively. The antimicrobial activity of some new compounds has been discussed.</p> https://journalofchemistry.org/paper/740/ Synthesis and Antimicrobial Activity Pyrazolopyridazine Derivatives