The synthesis of a novel tetracyclic structure, 8, 9-dihydroimidazo [4, 5-c] pyrrolo [3, 2-g] quinolin-4 (5H)-one, has been achieved by a convergent pathway. Coupling of the weakly nucleophilic hindered aromatic amine with 1-benzylimidazole-4-carboxylic acid,, afforded the corresponding amide using a DCP/DMF complex; subsequent Heck-type arylation leading to desired tetracyclic molecule imidazo [4, 5-c]-pyrrolo [3, 2-g] quinolin-4 (5H)-one.
