Synthesis of some heterocyclic systems of anticipated biological activities via 6-aryl-4-pyrazol-1-yl-pyridazin-3-one
作者:A SA Youssef、M I Marzouk、H MF Madkour、A MA El-Soll、M A El-Hashash
DOI:10.1139/v05-045
日期:2005.3.1
6-Aryl-4-pyrazol-1-yl-pyridazin-3-one (1) reacted with a PCl5POCl3 mixture to give the 3-chloropyridazine derivative 3. Reaction of 3 with 2-hydroxybenzoylhydrazide and semicarbazidehydrochloride afforded 4 and 5. Reaction of 1 with ethyl chloroacetate gave 8. Reaction of 8 with hydrazine hydrate yielded the hydrazide 9. The hydrazide 9 condensed with the acetylenic ketones and esters 10a10d and