New general asymmetric synthesis of versatile .gamma.-alkylated butenolides and its application to expeditious synthesis of the chiral Geissman-Waiss lactones useful for (+)-retronecine synthesis

作者: Yoshimitsu Nagao , Wei Min Dai , Masahito Ochiai , Motoo Shiro

DOI: 10.1021/JO00283A009

关键词: LactoneEnantioselective synthesisRetronecineAlkylationChemistryStereochemistryOrganic chemistryEnantiomer

摘要: La reaction de l'alcoolate vinylique l'etain II, chiral, avec des [dihydro-2,5 hydroxy-5] furannones-2 conduit diastereoselectivement a [acetonyl-5 dihydro-2,5] fournissant ainsi une voie d'acces formelle la (+) retronecine

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