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Synthesis 2005(19): 3451-3455
DOI: 10.1055/s-2005-918466
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
Further Information
Received
18 July 2005
Publication Date:
14 November 2005 (online)
Publication History
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.
Key words
carboxylic acids - aldehyde - addition reaction - amino alcohols - diastereoselectivity
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