Synthesis 2011(12): 1974-1983  
DOI: 10.1055/s-0030-1260030
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

Kinetic Resolution of Secondary Alcohols by NHC-Catalyzed Oxidative Esterification

Suman De Sarkar, Anup Biswas, Chie Hoon Song, Armido Studer*
Institute of Organic Chemistry and NRW Graduate School of Chemistry, University of Münster, Corrensstr. 40, 48149 Münster, Germany
Fax: +49(251)8336523; e-Mail: studer@uni-muenster.de;
Further Information

Publication History

Received 18 March 2011
Publication Date:
06 May 2011 (online)

Abstract

Kinetic resolution of racemic secondary alcohols by oxidative esterification using carbene catalysis is described. Good to moderate selectivity has been achieved. N-Heterocyclic carbenes (NHCs) were systematically varied and several aldehydes were included in this study as acyl donors. As an oxidant, a readily available bisquinone-type system was used.

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15

Scheidt and co-workers reported the desymmetrization of meso-diols using oxidative carbene catalysis; see ref. 8a.

18

The absolute configuration of the major enantiomer of 15a formed using catalyst 8 was determined by comparing the HPLC retention time with that of an authentic sample.