Wang B, Wong OA, Zhao MX, Shi Y. Asymmetric epoxidation of 1,1-disubstituted terminal olefins by chiral dioxirane via a planar-like transition state.
J Org Chem 2008;
73:9539-43. [PMID:
18850744 PMCID:
PMC2736380 DOI:
10.1021/jo801576k]
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Abstract
Various 1,1-disubstituted terminal olefins have been investigated for asymmetric epoxidation using chiral ketone catalysts. Up to 88% ee has been achieved with a lactam ketone, and a planar transition state is likely to be a major reaction pathway.
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