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4, 20–30% yield, 9:1, 11a:11b) which provided the same products with a comparable level of diastereoselectivity. The di‐n‐butylboronyl enolate proved ineffective.
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84989505996
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1H NMR spectroscopy. The epimerization of anti‐11a to syn‐11a detailed occurs at the MeS center.
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33
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84989500111
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3OH).
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