对映体

This paper reviews the recent advances in synthesis of chiral allylic amines, mainly discussing the effects of ligands on chemo-and regio-selectivities.

综述了近年来手性烯丙基胺的合成进展，重点介绍了催化剂配体对化学选择性和对映选择性的影响，并阐述了各种类型的反应机理

It is demonstrated that the chiral quaternary ammonium salts catalysts exhibit promising catalytic properties for the substrate. Part III: The synthesis and the characterizing of the macroporous aminomethyl resin-supported cinchona alkaloid complexes and the study on its catalytic properties The part consists of two subsections. the macroporous aminomethyl resin -supported cinchona alkaloid complexes were synthesized by the stuff (cinchonine, quinine and macroporous aminomethyl resin). Their structures were characterized by means of elemental analysis, XPS, TG/DTA; the chiral polymer-supported complexes were first used as catalysts for the reduction of ketones. Their catalytic properties for the reduction processes were investigated. The comparison of the products e.e., the conversion of the substrate among different reduction processes was employed with determined by HPLC. The effects of the time, the temperature, the ratio of catalyst to substrate, reaction solvent as well as the recycle times were also discussed.

第三章聚-4-氨甲基苯乙烯负载金鸡纳碱金属络合物的合成与表征及其不对称催化性能研究本章分为两节，以辛可宁和奎宁及聚-4-氨甲基苯乙烯为原料，合成了4种聚-4-氨甲基苯乙烯负载金鸡纳碱络合物催化剂，并对它们的结构用元素分析、X-射线光电子能谱、TG/DTA等几种测试手段进行了表征；首次将所合成的手性高分子负载的金属络合物用于催化芳香酮不对称还原反应，详细研究了所得的手性高分子负载的金属络合物对不同底物的催化性能，用HPLC等分析手段定量检测了还原过程的底物转化率及其产物对映异构体选择性，并考察了反应时间、反应温度、催化剂和底物投料比、反应溶剂和循环次数对催化性能的影响。

In this dissertation, eight novel bisoxazoline ligands L1-L8 containing 2,2-dimethyl cyclopropane units have been synthesized and evaluated in the asymmetric cyclopropanation and Diels-Alder reaction, moreover the influence of many factors on the enantioselectivity of the new ligands was studied in detail.

在本论文中，我们设计并合成了8个新型双噁唑啉手性配体L1～L8，并研究它们在环丙烷化反应与Diels-Alder反应中的对映选择性，以及影响配体不对称诱导性能的各种因素。

The asymmetric addition of organometallic reagents to prochiral imine in the presence of chiral ligands is attrac...

有机金属试剂在手性配体促进下对潜手性亚胺的对映选择性加成已成为有兴趣的课题之一。

The asymmetric addition of organometallic reagents to prochiral imine in the presence of chiral ligands is attracting inceasing interest.

有机金属试剂在手性配体促进下对潜手性亚胺的对映选择性加成已成为有兴趣的课题之一。

Objecdt ive Synthesis of molecularly imprinted polymer membrane to separate racemate of amino acid hydantoins.

合成了可对氨基酸海因对映异构体选择性分离的分子印迹聚合物膜。

In order to evaluate the difference between enantiomers and the racemate in the research about pharmacology and toxicology, both high optical pure enantiomers of KMBZ-009 were obtained with efficient method of enzymatic-catalyst kinetic resolution.

2为了评价KMBZ-009光学对映异构体在药效、毒性上是否存在显著性差异，成功地进行了KMBZ-009光学异构体酶促动力学拆分。

In this chapter, we report the synthesis of an alkyl imidazo lium salt supported chiral sulfonamide ligand and its use and recycling in enantiosel-ective reduction of prochiral ketones to optically active secondary alcohols.

在这里我们报道了一种离子液体接枝的磺酰胺手性配体以及在前手性酮的不对称还原反应中的应用，获得了较好的对映纯过量，实现了手性配体的回收和重复使用。

Theoretical studies on various geometrical structures of Hypophosphorous acid were carried out using DFT theoretical methods,at the B3LYP/6—311++G** level.Intramolecular proton transfer isomerization has also been studied using the intrinsic reaction coordinate.

采用量子化学密度泛函B3LYP方法，在6—311++G**基组水平上全优化得到了硫代次磷酸的硫酮式和硫醇式两种构型异构体以及相应的对映异构体，同时对分子内质子转移异构化反应微观机理进行了理论分析。

Theoretical studies on various geometrical structures of Hypophosphorous acid were carried out using DFT theoretical methods, at the B3LYP/6-311 ++ G(superscript **) level. Intramolecular proton transfer isomerization has also been studied using the intrinsic reaction coordinate.

采用量子化学密度泛函B3LYP方法，在6-311++G基组水平上全优化得到了硫代次磷酸的硫酮式和硫醇式两种构型异构体以及相应的对映异构体，同时对分子内质子转移异构化反应微观机理进行了理论分析。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。