“…As a part of our continued interest in the development of highly expedient methods for the synthesis of heterocyclic compounds [26][27][28][29], we herein report a facile and efficient synthetic strategy for quinoxaline derivatives in excellent yield using SbCl 3 /SiO 2 in methanol as benign solvent [30]. Despite the use of few solid heterogeneous catalysts in literature [20,22,23,25], silica-supported heterogeneous Lewis acid catalysts, like SbCl 3 /SiO 2 , have not yet been explored with regard to the preparation of quinoxalines.…”