Total Syntheses of Murrayamine E, I, and K
2015
Schuster, Christian | Julich-Gruner, Konstanze K. | Schnitzler, Heinrich | Hesse, Ronny | Jäger, Anne | Schmidt, Arndt W. | Knölker, Hans-Joachim
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 K. 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.
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