CF3-containing spiro-epoxyoxindoles were successfully prepared via the Corey-Chaykovsky reaction of N-alkyl isatins with the ylide generated from Ph2S+CH2CF3OTf- with almost exclusive diastereoselectivity. Further derivatizations of these spiro-epoxyoxindoles were explored via a photochemical reaction or Lewis acid-promoted allylation.
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| http://dx.doi.org/10.1039/c8ob00602d | DOI Listing |
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