Highly Enantioselective 1,4-Addition of Diethyl Phosphite to Enones Using a Dinuclear Zn Catalyst
作者:Depeng Zhao、Ye Yuan、Albert S. C. Chan、Rui Wang
DOI:10.1002/chem.200802688
日期:2009.3.9
Zinc benefits: The first catalytic asymmetric phospha‐Michael addition of enones has been developed. Under mild reaction conditions, the γ‐oxo phosphonates could be obtained in high yields (up to 99 %) with excellent enantioselectivities (93–99 % ee; see scheme). The strategy makes the asymmetric synthesis of biologically important phosphonate compounds more accessible.
锌的优点:首次开发了烯酮的催化不对称磷酸-迈克尔加成反应。在温和的反应条件下,可以以高收率(高达99%)和出色的对映选择性(93–99%ee;参见方案)获得γ-氧代膦酸酯。该策略使生物学上重要的膦酸酯化合物的不对称合成更容易实现。