Highly chemoselective Rauhut-Currier reaction between maleimides and enones and dual phosphine-mediated one-pot synthesis of bicyclic and polycyclic skeletons

J Org Chem. 2013 Nov 1;78(21):10596-604. doi: 10.1021/jo401363u. Epub 2013 Oct 14.

Abstract

A highly chemoselective phosphine-catalyzed Rauhut-Currier reaction between maleimides and enones has been realized under very mild conditions, affording the corresponding cross-coupling products in moderate to excellent yields. On the basis of this reaction, an efficient dual phosphine-mediated one-pot synthesis of bicyclic and polycyclic compounds containing a cyclopenta[c]pyrrole skeleton has been accordingly developed, which features a tandem sequence of intermolecular Rauhut-Currier reaction and intramolecular Wittig reaction.