Synthesis 2005(19): 3451-3455  
DOI: 10.1055/s-2005-918466
PAPER
© Georg Thieme Verlag Stuttgart · New York

New Synthesis of (±)-Sitophilate Using Carboxylic Acid Dianion Methodology - A Stereoselectivity Study

Salvador Gil, Margarita Parra*, Pablo Rodriguez, Enrique Sotoca
Department de Organic Chemistry, Universitat de València, C/Dr. Moliner 50, 46100 Burjassot, Spain
Fax: +34(9)639083152; e-Mail: Margarita.Parra@uv.es;
Further Information

Publication History

Received 18 July 2005
Publication Date:
14 November 2005 (online)

Abstract

A simple two-step synthesis of (±)-sitophilate in has been developed by addition of propanal to the lithium enediolate of propanoic acid and subsequent esterification with 3-pentanol under standard Fischer conditions. Efforts to control the diastereoselectivity to generate the syn isomer are described. A modest degree of asymmetric induction is found using chiral amides as base.