Synthesis of carbazoloquinones via direct palladation of 5-anilino-2-phenylthio-1,4-benzoquinones and of 2-anilino-1,4-naphthoquinones

Article abstract of DOI:10.1055/s-1991-26424

5-Anilino-2-phenylthio-1,4-benzoquinones and 2-anilino-1,4-naphthoquinones 1 undergo a facile one-step oxidative coupling in the presence of palladium(II) acetate to produce a series of substituted 3-phenylthiocarbazole-1,4-diones and benzo[b]carbazole-1,