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Synfacts 2005(1): 0139-0139  
DOI: 10.1055/s-2005-916014
Metal-Catalyzed Asymmetric Synthesis and Stereoselective Reactions
© Georg Thieme Verlag Stuttgart · New York

Asymmetric Epoxidation of α,β-Unsaturated Esters With Yttrium-Biphenyldiol Complex

Contributor(s): Hisashi Yamamoto, Matthew B. Boxer
H. Kakei, R. Tsuji, T. Ohshima, M. Shibasaki*
University of Tokyo, Japan
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Publikationsdatum:
21. September 2005 (online)

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Significance

Using a new Y-ligand (1 - Ph3As=O) catalyst, the epoxidation proceeds smoothly with both alkyl- and aryl-substituted unsaturated esters. The epoxy-ester products are important and versatile, chiral synthetic building blocks.