optically active

racemization is the conversion of an optically active form of a compound into a racemic mixture;

外消旋作用是把一种化合物的光学活性形式转化为外消旋的混合物；

this article narrates the transformation of carbonyl group in optically active epoxy ketones under different reagents and enumerates some synthetic applications of this kind of transformation.

本文讲述了有机合成中光学活性的环氧酮化合物中酮羰基在不同试剂下的转化，并列举了一些相关的合成应用。

as natural biocatalysts, enzymes catalyze chemical reactions with high catalytic efficiency and stereoselectivity and mild conditions, which can be not only used for the efficient resolution of racemic drugs and related synthons, but also the direct construction of chiral center of optically active drugs.

作为天然的生物催化剂，酶催化化学反应具有催化效率和立体选择性高、反应条件温和的特点。酶不仅适于外消旋药物及其合成子的有效拆分，而且可用于光学活性药物手性中心的直接构建。

Racemization is found with optically active substrates.

发现旋光基质有外消旋作用.

Optically active Cobalt ( salen) complexes show very high catalytic activity and enantioselectivity for the asymmetric ring opening of terminal epoxides using HN3 as azide source.

手性金属钴络合物在以叠氮酸作为亲核试剂的环氧化合物的不对称开环反应中具有很高的催化活性和对映异构选择性。

Chiral aromatic alcohol and hydroxy acid are important intermediates for the synthesis of optically active molecules and are widely applied in food, pharmaceutical, agricultural, fine chemicals areas.

手性芳基醇、羟基羧酸是合成光学活性分子的关键中间体，广泛应用于食品、医药、精细化工及农业等领域。

A series of optically active sulfenimines carryins new camphor based mercapto chiral auxiliaries have been synthesized.

合成了四种含樟脑巯基手性助剂的光学活性的硫亚胺化合物.

A new synthetic method for optically active α-terpineol

光学活性α-松油醇的合成新方法

Alkylation of imines can be applied to the synthesis of various useful compounds and aza-Diels-Alder reaction can yield not only optically active but also sterically constrained α-amino acid derivatives. This paper just have a simple introduction and a discussion on both of these reactions.

亚胺的烷基化反应能用来合成大量的化合物，而aza Diels Alder反应[1]不仅可以合成有空间位阻的，而且能合成具有光学活性的α氨基酸衍生物。

the optically active secondary alcohols were obtained in moderate to high enantiomeric excesses and high chemical yields.

光学活性二级醇化学产率很高，对映体过量最高可达93%。

Optically active cyanohydrins are important intermediates lor the synthesis of agricultural chemicals.

光学活性氰醇是合成大量医药、农药产品的重要中间体.

Optically active polymers, for its special chiral structure, can be used asymmetric synthesis.

旋光性高分子在结构上具有一定的空间特异性, 因而可以有多种应用.

Study on Asymmetric Synthesis of Steroids XV. The Synthesis of Optically Active 3-Oxa-A-nor-steroids

甾族化合物不对称合成的研究XV.光学活性3-氧杂-A-失碳甾族化合物的合成

synthesis of optically active chiral cyclic guanidine derivative

手性环胍衍生物的合成

optically active amines and amino acids play an important role in the pharmaceutical, agrochemical and chemical industry.

手性胺和氨基酸在医药，农业化学和化工等行业发挥着重要作用。

The changes of temperature, concentration and solvent will affect the conformation in some optically active molecules.

温度 、 浓度和溶剂的变化将导致一些光学活性分子旋光方向的改变.

The mechanisms and recent advances of industrial production of optically active compounds have been reviewed.

本文介绍了光学活性物质的几种工业规模的生产方法及最新的进展.

calculation of optical rotation on the optically active inositol and its methyl derivant

光学活性肌醇及其甲基衍生物的旋光度计算

The prospect of industrial preparation of the optically active EHB by microbial whole-cells was also discussed.

最后对生物催化制备光学活性EHB的工业化前景进行了展望。

the main route for obtaining optically active alcohols is resolution of racemic alcohols catalyzed by enzyme in organic solvents by the esterification reaction.

有机相中应用酯化反应，酶法催化拆分消旋醇是获得光学活性醇的重要途径。

Chiral synthesis can be achieved by taking advantage of natural or synthetic optically active compounds.

在手性合成中利用了天然或合成的光学活性化合物.

asymmetric transfer hydrogenation of aromatic ketones is an attractive method for the preparation of optically active alcohols.

因而，从芳香酮的对映选择性氢化制备相应的手性醇受到了人们的极大关注。

Synthesis of an optically active triblock copolymer and its self assembly behavior in dioxane/ water

光学活性三嵌段刚柔共聚物的合成和在二氧六环/水中的自组装

allenes are a class of compounds containing a cumulative diene functionality, which would be optically active when the two substituent groups on both of the terminal carbons of allene are different from each other.

联烯是一类含1,2-累积二烯官能团的化合物，其末端碳原子上取代基两两不同时就具有了轴手性。