Addition reactions of heterocyclic compounds. Part XXXL. Methylquinoxalines with acetylenic esters
Abstract
2-Methyl- and 2,3-dimethyl-quinoxaline react with dimethyl acetylenedicarboxylate to give azepino[1,2-a]-quinoxalines with the shift of an ester group. Some reactions and the spectra of the azepinoquinoxalines are discussed.