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Synfacts 2010(4): 0450-0450  
DOI: 10.1055/s-0029-1219618
Metal-Catalyzed Asymmetric Synthesis and Stereoselective Reactions
© Georg Thieme Verlag Stuttgart ˙ New York

Chiral Phosphate Counteranion Directed Enantioselective Expoxidation

Contributor(s): Hisashi Yamamoto, Patrick Brady
S. Liao, B. List*
Max-Planck-Institut für Kohlenforschung, Mülheim an der Ruhr, Germany
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Publikationsdatum:
22. März 2010 (online)

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Significance

The authors report a highly enantio­selective variation of the Jacobsen-Katsuki epoxidation that employs a chiral phosphate counteranion and an achiral salen complex. For most substrates, enantioselectivities are comparable to those obtained with Jacobsen’s catalyst.