Synlett 2009(3): 377-383  
DOI: 10.1055/s-0028-1087555
LETTER
© Georg Thieme Verlag Stuttgart ˙ New York

Thieme Chemistry Journal Awardees- Where are They Now? Intermolecular Cross-Acyloin Reactions by Fluoride-Promoted Additions of O-Silyl Thiazolium Carbinols

Alex K. Mathies, Anita E. Mattson, Karl A. Scheidt*
Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
Fax: +1(847)4672184; e-Mail: scheidt@northwestern.edu;
Further Information

Publication History

Received 3 October 2008
Publication Date:
21 January 2009 (online)

Abstract

The addition of acyl anion equivalents to aliphatic aldehydes (crossed-acyloin reaction) has been developed. Cesium fluoride with isopropanol as solvent promotes the addition of O-silyl thiazolium carbinols to various aliphatic aldehydes in moderate to good yields. These reactions represent a general procedure for the selective coupling of aliphatic aldehydes by an acyl anion reaction which have been problematic until now.

43

The use of aldehydes with benzoyl and triisopropylsiloxy functionalities was incompatible with this sequence.

46

Gronert S.; Org. Lett.; 2007, 9, 3065.

51

The ¹³C NMR and IR spectra were not obtained due to decomposition of product upon purification.