Intramolecular Methylation of an Allyl Sulfone via Lithium Alkoxyaluminate; Application to the Enantioselective Synthesis of the CD Ring of Vitamin D-3

[摘要]：Alcohol-directed intramolecular methylation of an enantiopure allyl sulfone using AIMe(3) provides a trans-hydrindane CD ring alcohol. The substrate cis-CD ring allyl sulfone alcohol is prepared via intramolecular allyl sulfonyl anion addition to aldehyde using Ba(OH)(2).

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