Synthesis of indolocarbazoles via sequential palladium catalyzed cross- coupling and benzannulation reactions

Article abstract of DOI:10.1016/S0040-4039(97)10088-0

Differentially substituted indolocarbazoles are readily prepared via a synthetic route employing two palladium catalyzed reactions. First, biindoles are prepared from a palladium catalyzed cross coupling reaction. Second, a new palladium catalyzed benzannulation reaction employing biindolyl iodides and alkynes provides indolocarbazoles.