Highly Effective Chiral Ortho-Substituted BINAPO Ligands (<i>o</i>-BINAPO): Applications in Ru-Catalyzed Asymmetric Hydrogenations of β-Aryl-Substituted β-(Acylamino)acrylates and β-Keto Esters
作者:Yong-Gui Zhou、Wenjun Tang、Wen-Bo Wang、Wenge Li、Xumu Zhang
DOI:10.1021/ja020121u
日期:2002.5.1
complexes were highly efficient catalysts for asymmetric hydrogenation of β-aryl-substituted β-(acylamino)acrylates and β-aryl-substituted β-keto esters. The Ru-bisphosphinite catalysts can tolerate an E/Z mixture of β-aryl-substituted β-(acylamino)acrylates. These highly enantioselective hydrogenations provide a useful way to prepare β-aryl-substituted β-amino acids and β-hydroxyl acids.
BINOL合成了一系列手性邻位取代的BINAPO配体(o-BINAPO),它们的Ru配合物是β-芳基取代的β-(酰氨基)丙烯酸酯和β-芳基取代的β的不对称氢化的高效催化剂-酮酯。Ru-双次膦酸盐催化剂可以耐受 β-芳基取代的 β-(酰氨基)丙烯酸酯的 E/Z 混合物。这些高度对映选择性氢化为制备 β-芳基取代的 β-氨基酸和 β-羟基酸提供了一种有用的方法。