Synthesis and study of 3-methyl-6H-indolo[2,3-b]quinoxalines

Abstract

By the condensation of isatin, N-methyl-, N-propyl-, N-benzoylisatin with 4-methyl-1,2-benzeneldiamine 3-methyl-6H-indolo[2,3-b]quinoxalines were obtained in high yields. The reaction occurs stereoselectively, in the mixture only one of possible isomers is present. By the oxidation of methyl group of the quinoxaline fragment new carbonyl derivatives were obtained, and by the reduction of nitro group, the corresponding indoloquinoxalinamines.