The present invention provides a method for producing a reduction reaction product, wherein recovery of the reaction solvent and/or distillation is carried out after adding a nitrogen-containing compound into a reaction liquid of a reduction reaction that has been conducted using a transition metal complex. The present invention is capable of suppressing decrease in the optical purity of the reduction reaction product due to the transition metal complex used as a catalyst.
Chiral Porous Hybrid Solids for Practical Heterogeneous Asymmetric Hydrogenation of Aromatic Ketones
作者:Aiguo Hu、Helen L. Ngo、Wenbin Lin
DOI:10.1021/ja0348344
日期:2003.9.1
Chiralporous zirconium phosphonates containing Ru-BINAP-DPEN moieties were synthesized via a molecular building-block approach, and characterized by a variety of techniques including TGA, adsorption isotherms, XRD, SEM, IR, and microanalysis. These hybridsolids were used for enantioselectiveheterogeneousasymmetrichydrogenation of aromatic ketones with remarkably high ee values of up to 99.2%.
含有 Ru-BINAP-DPEN 部分的手性多孔膦酸锆是通过分子构建块方法合成的,并通过各种技术进行表征,包括 TGA、吸附等温线、XRD、SEM、IR 和微量分析。这些杂化固体用于芳香酮的对映选择性多相不对称氢化,具有高达 99.2% 的非常高的 ee 值。这些固体催化剂还可以轻松回收和重复使用八次,而不会损失活性和对映选择性。这种分子构建块方法的现成可调性将允许优化这些混合材料,并有望导致其他实用的非对称非对称催化剂。
Chiral porous metal phosphonates for heterogeneous asymmetric catalysis
申请人:——
公开号:US20040192543A1
公开(公告)日:2004-09-30
Chiral porous zirconium phosphonates containing metal complex moieties are provided, synthesized via a molecular building block approach, and characterized by a variety of techniques including TGA, adsorption isotherms, XRD, SEM, IR, and microanalysis. These hybrid solids may be used for enantioselective heterogeneous asymmetric hydrogenation of aromatic ketones with remarkably high e.e. values of up to 99.2%. Similarly prepared chiral porous solids may be used for asymmetric hydrogenation of &bgr;-keto esters with e.e.'s of up to 95%. The solid catalysts can also be easily recycled and reused multiple times without the loss of activity and enantioselectivity. Ready tunability of such a molecular building block approach allows the optimization of these hybrid materials to provide practically useful heterogeneous asymmetric catalysts.
A process for producing an optically active amine compound, characterized by asymmetrically hydrogenating a prochiral carbon-nitrogen double bond in the presence of a ruthenium complex represented by general formula (1) or (2) (wherein P
represents an optically active diphosphine, X represents an anionic group, and Ar represents an optionally substituted arylene group).
Highly enantioselective catalytic asymmetric hydrogenation of β-keto esters in room temperature ionic liquids
作者:Helen L. Ngo、Aiguo Hu、Wenbin Lin
DOI:10.1039/b302637j
日期:——
Polar phosphonic acid-derived Ru-BINAP systems were used to catalyze asymmetric hydrogenation of β-keto esters in room temperature ionic liquids (RTILs) with complete conversions and ee values higher than those obtained from homogeneous reactions in MeOH (up to 99.3%), and were recycled by simple extraction and used for four times without the loss of activity and enantioselectivity.