Abstract New tricyclic quinoxalinone skeletons with a fully-reduced ring 'C'-1, 2, 3, 3a- tetrahydropyrrolo [1, 2-α] quin-oxalin-4-one (I-II) and 7, 8, 9, 10-tetrahydropyrido [1, 2-α] quinoxalin-6-one (III-IV) derivatives were obtained by selective hydrogen transfer reductive cyclisation of N-(2-nitrophenyl) pyrrolidine-2-carboxylic acid esters and N-(2-nitrophenyl) piperidine-2-carboxylic acid esters (VIa, b and VIIIa, b), respectively.
