First total syntheses of chrestifoline-B and (±)-chrestifoline-C, and improved synthetic routes to bismurrayafoline-A, bismurrayafolinol and chrestifoline-D†‡,10.1039/C4OB00609G

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First total syntheses of chrestifoline-B and (±)-chrestifoline-C, and improved synthetic routes to bismurrayafoline-A, bismurrayafolinol and chrestifoline-D†‡

Carsten Börger,Arndt W. Schmidt,Hans-Joachim Knölker

Organic & Biomolecular Chemistry Pub Date : 04/17/2014 00:00:00 , DOI:10.1039/C4OB00609G

Abstract

We describe an efficient synthesis of the methylene-bridged biscarbazole alkaloids bismurrayafoline-A, bismurrayafolinol and chrestifoline B–D using an Ullmann-type coupling at the benzylic position.