Synlett 2011(18): 2705-2708  
DOI: 10.1055/s-0031-1289535
LETTER
© Georg Thieme Verlag Stuttgart ˙ New York

TiCl4-Promoted Mukaiyama Aldol Reaction of Fluorinated Silyl Enolates for the Construction of a Quaternary Carbon Center

Wengui Wang, Qing-Yun Chen, Yong Guo*
Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. of China
Fax: +86(21)64166128; e-Mail: yguo@sioc.ac.cn;
Further Information

Publication History

Received 10 July 2011
Publication Date:
19 October 2011 (online)

Abstract

A method for the preparation of α-fluoro-β-hydroxy­phenones from Mukaiyama aldol reactions of various aldehydes and fluorinated silyl enolates was reported. The reaction was promoted by TiCl4 and afforded the desired products in good to excellent yields. The relative stereochemistry of the products was determined by X-ray analysis of single crystals of syn-2-fluoro-3-hydroxy-2-methyl-1,3-diphenylpropan-1-one and anti-2-fluoro-3-hydroxy-2,4,4-trimethyl-1-phenylpentan-1-one.

16

See Supporting Information for details. The complete crystallographic data can be obtained under the deposition numbers CCDC 833428 from the Cambridge Crystallo-graphic Data Centre.

17

See Supporting Information for details. The complete crystallographic data can be obtained under the deposition numbers CCDC 833429 from the Cambridge Crystallo-graphic Data Centre.