Oxidation of Hecogenin and Diosgenin Derivatives with Dimethyldioxirane

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Diacetyl derivative of hecogenin 1 was oxidized to unsaturated ketone 5 via allylic alcohol 3 when it reacted with dimethyldioxirane (DMDO). The structure of 3 was confimed by X-ray crystal analysis and the highly regioselectivity of DMDO to different ole
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