Şener, A.Akbaş, E.Şener, M.K.2025-05-102025-05-1020041300-05272-s2.0-3142547136https://hdl.handle.net/20.500.14720/18006The 1H-pyrazole-3-carboxylic acid 2, obtained from the furandione 1 and 2-hydrazinopyridine, was decarboxylated to give 4-benzoyl-5-phenyl-1-pyridin-2- yl-pyrazole derivative 3. Some ester 4 derivatives of 2 were prepared by the Fischer esterification reactions of 2 with various alcohols. Cyclocondensation reactions of 2 with phenyl hydrazine or hydrazine hydrate led to the formation of derivatives of pyrazolo[3,4-d]pyridazine 5 derivatives.eninfo:eu-repo/semantics/closedAccessCyclic Oxalyl CompoundsPyrazolePyrazolo [3,4-D] PyridazinoneArticle283Q4Q3271277