Synthesis of Benzo[f]indole-4,9-dione and Benzo[b]carbazole-6,11-dione ­Derivatives via One-Pot Sequential C,N-Dialkylation of Enaminones of β-Diketones and Ketoesters by 2,3-Dichloronaphthoquinone

Direct one-pot syntheses of benzo[f]indole-4,9-dione and benzo[b]carbazole-6,11-dione derivatives have been achieved in moderate to high yields via sequential C,N-dialkylation of the monoenamines of β-dicarbonyl compounds (the β-enaminones) by 2,3-dichloronaphthoquinone