Synthesis 2006(2): 320-324  
DOI: 10.1055/s-2005-918516
PAPER
© Georg Thieme Verlag Stuttgart · New York

A Stereoselective Synthesis of (4E,7S)-(-)-7-Methoxydodec-4-enoic Acid

Yang Li, Jie Chen, Xiao-Ping Cao*
State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. of China
Fax: +86(931)8912582; e-Mail: caoxplzu@163.com;
Further Information

Publication History

Received 8 July 2005
Publication Date:
21 December 2005 (online)

Abstract

A stereoselective synthesis of (4E,7S)-(-)-7-methoxydodec-4-enoic acid has been accomplished in eight steps from hexanal in 24% overall yield. The key steps involved the catalytic asymmetric allylation of hexanal and the coupling reaction of a chiral alkyne and a protected bromide in the presence of t-BuLi.

13

t-BuLi it is not commercially available to us due to transportation problems.

14

No other signals were observed around the chiral center (C-7 and C-1′).