Enantioface-differentiating (Asymmetric) Hydrogenation of Keto Ester with Modified Nickel Catalyst. XXXII. Structural Requirements of Modifying Reagent and Substrate
作者:Shinji Okamoto、Tadao Harada、Akira Tai
DOI:10.1246/bcsj.52.2670
日期:1979.9
The enantioface-differentiating hydrogenation of α-, β-, γ-, and δ-keto esters over α-, β-, and γ-amino acid–MRNi has been conducted. The optimum enantio-differentiating power of α-amino acid-MRNi has been found in the hydrogenation of the β-keto ester and that of β-amino acid-MRNi found in the hydrogenation of the γ-keto ester. The results have been explained in terms of the intermolecular recognition between substrate and modifying reagent through the functional groups.
已进行α-、β-、γ-和δ-酮酯在α-、β-和γ-氨基酸修饰的MRNi上的对映面区分氢化反应。发现α-氨基酸修饰的MRNi在β-酮酯氢化中具有最佳的对映区分能力,而β-氨基酸修饰的MRNi在γ-酮酯氢化中表现出最佳的对映区分能力。这些结果可通过底物与修饰剂通过功能团的分子间识别来解释。