Synlett 2004(1): 57-60  
DOI: 10.1055/s-2003-43351
LETTER
© Georg Thieme Verlag Stuttgart · New York

Highly Enantioselective Cr(salen)-Catalyzed Mukaiyama Aldol Reaction: Construction of δ-Hydroxy-β-keto Ester Derivatives

Yuya Shimada, Yuko Matsuoka, Ryo Irie, Tsutomu Katsuki*
Department of Chemistry, Faculty of Science, Graduate School, Kyushu University, 33, Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
Fax: +81(92)6422607; e-Mail: katsuscc@mbox.nc.kyuhsu-u.ac.jp;
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Publikationsverlauf

Received 22 September 2003
Publikationsdatum:
26. November 2003 (online)

Abstract

Mukaiyama aldol reactions of silyl dienol ether and aldehydes proceeded with high enantioselectivity to give δ-hydroxy-β-keto ester derivatives by using chiral cationic Cr(salen) complex as catalyst in the presence of isopropyl alcohol and base (triethylamine or 2,6-dimethylpyridine).