Asymmetric epoxides, their synthesis and use
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United States of America Patent
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May 8, 2001
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N/A
app pub date -
Oct 20, 1997
filing date -
Apr 19, 1996
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Expired
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Abstract
A process for preparing an optically-enriched chiral epoxide of formula I ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are each independently selected from H, R, R--CO-- and R--O--CO--, each R independently being substantially a hydrocarbon group of up to 20 carbon atoms, and X is an alkyl or cycloalkyl group of up to 10 carbon atoms, provided that --CO--X is not enolisable, which comprises the asymmetric epoxidation of a corresponding prochiral alkene of formula II R.sup.1 R.sup.2 C.dbd.CR.sup.3 --CO--X (II) by reaction with an oxidant in the presence of a chiral catalyst. Many optically-enriched epoxides (I) are novel.
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