Palladium Catalysed Cross-Coupling Reaction with Indolylborate: A Concise Access to Ellipticine Derivatives
作者:Minoru Ishikura、Toshikatsu Yaginuma、Isao Agata、Yoshihisa Miwa、Reiko Yanada、Tooru Taga
DOI:10.1055/s-1997-746
日期:1997.2
A novel approach to ellipticine derivatives is described. The palladium catalysed cross-coupling reaction of indolylborate 1 with vinylbromides 4 gives hexatrienes 5, which are subsequently converted to pyrido[4,3-b]carbazoles. In addition, the acid promoted spiroannelation reaction of hexatrienes 5 is observed to give spiroindoles 9.