Acetylenic compounds as key intermediates in heterocyclic synthesis: a route to functionalized naphtha[2,3-h]quinoline-7,12-diones

Addition of primary and secondary amines to ethyl (1-amino-9,10-anthraquinon-2-yl)propiolate and cyclization of the resulting adducts to 2-substituted 4-dialkyl(or alkyl)aminonaphtho[2,3-h]quinoline-7,12-diones and 4-dialkyl(or alkyl)amino-1,2-dihydronaphtho[2,3-h]quinoline-2,7,12-triones are reported.