Download PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... A novel, efficient, and regiospecific method for the construction of the imidazo[1,5-a]quinoxalin- 4(5H)-one template is described. The key reaction involves an intramolecular cyclization process and provides the desired products in excellent yield. ... Imidazo[1,5-a]quinoxalin-4(5H)- ...