Formation of 3-[2-oxo-2-(2-heteryl)ethylidene]-3,4-dihydroquinoxalin-2(1H)-ones in the reaction of 5-aryl-4-heteroyl-3-hydroxy-1-thiazolyl-3-pyrrolin-2-ones with o-phenylenediamine
Formation of 3-[2-oxo-2-(2-heteryl)ethylidene]-3,4-dihydroquinoxalin-2(1H)-ones in the reaction of 5-aryl-4-heteroyl-3-hydroxy-1-thiazolyl-3-pyrrolin-2-ones with o-phenylenediamine