作者:Christian Schuster、Konstanze K. Julich-Gruner、Heinrich Schnitzler、Ronny Hesse、Anne Jäger、Arndt W. Schmidt、Hans-Joachim Knölker
DOI:10.1021/acs.joc.5b00630
日期:2015.6.5
We describe efficient synthetic routes to murrayamine A (mukoenine C), O-methylmurrayamine A, mahanine, O-methylmahanine, and murrayamine D and the first total syntheses of murrayamine E, I, and R.. Key steps are a palladium-catalyzed construction of the carbazole framework and an: annulation of the pyran ring, which is either catalyzed by phenylboronic acid or promoted by a Lewis acid.