zwitterionic imidazolium salt of [moei]-bsa: an efficient solid acid catalyst-promoted green synthesis of quinoxaline derivatives

easily synthesized1-methyl-3-(2-oxyethyl)-1h-imidazol-3-ium-borate sulfonic acid {[moei]-bsa} as a novel catalyst efficiently promoted the synthesis of quinoxaline derivatives via condensation of various diamines with 1,2-dicarbonyl compounds at room temperature conditions in ethanol. this research provides a new method for the synthesis of quinoxalines in good to excellent yields with little catalyst loading. the catalyst could be recycled and reused several times without any loss of efficiency.