Volume 126, Issue 36 pp. 9794-9798
Zuschrift

Highly Enantioselective Rhodium(I)-Catalyzed Carbonyl Carboacylations Initiated by CC Bond Activation

Laetitia Souillart

Laetitia Souillart

Laboratory of Asymmetric Catalysis and Synthesis, EPFL SB ISIC LCSA, BCH 4305, 1015 Lausanne (Switzerland) http://isic.epfl.ch/lcsa

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Prof. Dr. Nicolai Cramer

Corresponding Author

Prof. Dr. Nicolai Cramer

Laboratory of Asymmetric Catalysis and Synthesis, EPFL SB ISIC LCSA, BCH 4305, 1015 Lausanne (Switzerland) http://isic.epfl.ch/lcsa

Laboratory of Asymmetric Catalysis and Synthesis, EPFL SB ISIC LCSA, BCH 4305, 1015 Lausanne (Switzerland) http://isic.epfl.ch/lcsaSearch for more papers by this author
First published: 14 July 2014
Citations: 49

This work is supported by the European Research Council under the European Community’s Seventh Framework Program (FP7 2007–2013)/ERC Grant agreement no. 257891. We thank Dr. R. Scopelliti for X-ray crystallographic analysis of compounds 2 j and 6.

Abstract

The lactone motif is ubiquitous in natural products and pharmaceuticals. The Tishchenko disproportionation of two aldehydes, a carbonyl hydroacylation, is an efficient and atom-economic access to lactones. However, these reaction types are limited to the transfer of a hydride to the accepting carbonyl group. The transfer of alkyl groups enabling the formation of CC bonds during the ester formation would be of significant interest. Reported herein is such asymmetric carbonyl carboacylation of aldehydes and ketones, thus affording complex bicyclic lactones in excellent enantioselectivities. The rhodium(I)-catalyzed transformation is induced by an enantiotopic CC bond activation of a cyclobutanone and the formed rhodacyclic intermediate reacts with aldehyde or ketone groups to give highly functionalized lactones.

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