Polyamino acid-catalyzed process for the enantioselective epoixdation of .alpha.,.beta.-unsaturated enones and .alpha.,.beta.-unsaturated sulfones
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United States of America Patent
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Aug 3, 2004
Grant Date -
May 8, 2003
app pub date -
Jul 24, 2002
filing date -
Jul 27, 2001
priority date (Note) -
Expired
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Abstract
The invention relates to a novel process that makes it possible to epoxidize .alpha.,.beta.-unsaturated enones or .alpha.,.beta.-unsaturated sulfones with high conversions and enantiomeric excesses in the presence of a water-soluble base, an oxidant, a diastereomer- and enantiomer-enriched homo-polyamino acid as catalyst, water, an organic solvent that is immiscible or has only limited miscibility with water, and a specific phase-transfer catalyst as cocatalyst.
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