Copper-Catalyzed γ-Selective and Stereospecific Allylic Alkylation of Ketene Silyl Acetals
作者:Dong Li、Hirohisa Ohmiya、Masaya Sawamura
DOI:10.1021/ja111645q
日期:2011.4.20
Copper-catalyzed allylic alkylation of ketene silyl acetals proceeded with excellent γ-E-selectivity. Efficient α-to-γ chirality transfer with anti-selectivity occurred in the reaction of enantioenriched secondary allylic phosphates, affording enantioenriched β-branched γ,δ-unsaturated esters. Excellent functional group compatibility was observed.
铜催化烯酮甲硅烷基缩醛的烯丙基烷基化以优异的γ-E-选择性进行。在对映体富集的仲烯丙基磷酸酯的反应中发生了具有抗选择性的高效 α 到 γ 手性转移,得到对映体富集的 β-支链 γ,δ-不饱和酯。观察到优异的官能团相容性。