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Hoffmann, Angew. Chem. Int. Ed. 1979, 18, 563-572 (Stereochemistry of) Nakai, Chem. Rev. 1986, 86, 885-902 (Wittig Rearrangement) Evans, Accts. Chem. Res. 1974, 7, 147-55 (Sulfoxide Rearrangement)

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