对映的

The CD230 of product mixture was positive and negative in the clockwise and anticlockwise rotation,respectively, and the effect was dependent on the rotation speed.

结果表明离心力场能够诱导产物的对映体过量，在顺时针和逆时针旋转力场中得到的产物CD230信号相反并随转速的增大而增大。

As a new method for asymmetric synthesis, enantioselective organocatalysis has become more and more popular.

作为不对称合成的一个新方法，对映选择性的有机催化已经成为越来越普遍应用的方法。

Along with tile rapid development of chirality science, the preparation of optically active chiral lactones is becoming increasingly important for research in chemistry and biochemistry.

摘要随着手性科学的快速发展，获取手性内酯的单一对映体具有重要的研究和应用价值。

In Chapter 1, the ubiquity of chiral phenomena and its important role in various disciplines, the methods for enantiomer separation, the principles of direct chromatographic separation of enantiomers and the status of chiral CGC are discussed and/or reviewed.

第一章论述或评述了手性特征的普遍性和在众多学科中的重要性、手性分离方法、色谱直接分离手性化合物对映体的基本理论、手性气相色谱研究现状。

Clausenamide is a compound isolated from clausena lansium Skeels, and has been synthesized and resoluted into levorotatory and dextorotatory clausenamide by our chemists.

黄皮酰胺是从芸香料黄皮属植物黄皮叶中分离出的化合物，我所合成室已完成它的全合成并应用拆分技术分离出它的对映异构体。

Results indicated that the-enantiomer showed significantly higher activity on cucumber and sorghum fresh weight inhibition than that of the-enantiomer, and also higher than that of the racemate at the same rate.

结果表明，单一左右旋对映体和等量的外消旋处理的高梁和黄瓜鲜重抑制作用差异显著，右旋体活性明显高于左旋体，也明显高于等量的外消旋体。

Based on the crystal structure of sulfonium salt and the reaction results, it was proposed that the β-hydroxy of the sulfonium salt play a key role in the highly stereoselective cyclopropantion reation.

根据硫盐晶体结构和硫盐在反应中所表现的性质，认为硫叶立德 b -位的羟基可能是反应取得高对映选择性的关键。

E. value of productions were detected by high performance liquid chromatography. Results The chiral aminoalcohol ligand compound Ⅰ can promote the asymmetric allylation of acylhydrazones and the yield was 57%; The highest values of e. e. obtained for this reaction was 22%.

结果 手性氨基醇配体化合物Ⅰ能够促进烯丙基三氯硅烷和酰腙的烯丙基化加成反应，在它的辅助作用下，烯丙基化加成产物的产率可达到57%，对映体过量值最高达到22%。

Under the optimum reaction conditions,:benzalacetone:Ru:KOH=1000:1:20, 2 MPa, 30℃, and 2h, the conversion and the selectivity toward the unsaturated alcohol was reached 99% and 99%, respectively, and the ee value of unsaturated alcohol was over 58.9%.

在优化的反应条件下，苄叉丙酮加氢反应的转化率大于99％，生成α，β-不饱和醇的选择性大于99％、对映选择性达到了58％ee以上。

In addition to cyclopropanation, the typical Diels-Alder reaction between cyclopentadiene and N-acryloyl-l,3-oxazolidinine-2-one with Ll-L8/metal complexes have also been studied.

对于新配体在Diels-Alder反应中的对映选择性的研究，我们采用环戊二烯与3-丙烯酰基-2-噁唑啉酮的反应。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐