Some Substituted Pyruvic Acid (Phthalazin‐1‐yl)hydrazones and [1,2,4]Triazinophthalazines as Possible Antimicrobial and Antineoplastic Agents

Abstract
In search for novel antimicrobial and antineoplastic agents, the synthesis of some substituted arylidenepyruvic acid (phthalazin‐l‐yl)hydrazones 3 and their cyclodehydration to 3‐substituted 4H‐[1,2,4]triazino[3,4‐α] phthalazin‐4‐ones 4 is reported. Compounds 4a, 4b and 7 were screened for in vitro antibacterial and antifungal activities and were inactive.