Sener, AGenç, HTozlu, ISener, MK2025-05-102025-05-1020041300-05272-s2.0-9744280619https://hdl.handle.net/20.500.14720/204194-Ethoxycarbonyl-5-phenyl-2,3-dihydro-2,3-furandione 1 was reacted with o-phenylenediamine, substituted ureas and methylcarbamate or acetamide to give quinoxaline 2, pyrimidine 3 and benzoylmalonic acid 4 derivatives, respectively. Benzoylmalonic acid derivative 4a was converted into a new oxozinedione derivative, 5, by refluxing its solution in xylene containing a catalytic amount of p-toluene sulfonic acid. In addition, triphenylpyrazole carboxylic acid derivative 6 was obtained from the reaction of 4a with diphenylhydrazine.eninfo:eu-repo/semantics/closedAccessCyclic Oxalyl CompoundsQuinoxalinePyrimidineBenzoylmalonic AcidOxazinePyrazole Carboxylic AcidArticle285Q4Q365966537382WOS:000225544500013