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Organic letters

Straightforward stereoselective synthesis of spiro-epoxyoxindoles.


PMID 17394349

Abstract

[reaction: see text] The in situ preparation of a sulfonium ylide reagent achieved the highly diastereoselective epoxidation of isatins, so that a new and straightforward access to biologically significant spiro-epoxyoxindoles is provided. The first investigations of an asymmetric version are reported with enantiopure sulfides.

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