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1)  enantioselectivity
对映异构选择性
1.
It is believed that effective stereochemical communication between substrate and enzyme is essen-tial for attaining high enantioselectivity in asymmetric reaction, and most of the successful salen-M catalysts also operate on this principle.
Salen与卟啉、Salen金属络合物与卟啉铁的结构和性质相似,因此可将Salen金属(Salen-M)络合物认为是仿生催化剂,它们的仿生性突出表现在不对称催化反应中的高对映异构选择性
2)  diastereoselectivity
非对映异构选择性
3)  enantioselective
对映选择性
1.
Our calculations confirm that title reaction consists of two parallel step processes, in which complexes, TS, intermediates and enantiomer middle products are located on the enantioselective reaction pathway between oxazaphospholidine borane adduct and acetophenone.
应用密度泛函理论BHandH/6-31G**计算方法研究新型手性非金属催化剂1,3,2-噁唑磷烷-硼烷催化还原苯乙酮的对映选择性反应机理,确定了在反应途径上的反应物、络合物、过渡态,中间体和对映体中间产物。
2.
The enantioselective Diels-Alder reaction of N-propenoyl-1,3-oxazolidin-2-one with cyclopentadiene was catalyzed by free and polymer-supported complexes of titanium with N-sulfonyl-L-amino acids.
用磺酰化的L 缬氨酸、L 苯丙氨酸、L 亮氨酸和L 异亮氨酸的钛螯合物催化N 丙烯酰 1,3 唑烷 2 酮与环戊二烯的对映选择性Diels Alder (D A)反应 ,其ee值为 48。
4)  enantioselectivity
对映选择性
1.
Control of biocatalysis enantioselectivity;
生物催化反应对映选择性控制
2.
which can catalyze the asymmetric Mannich reaction with high catalytic activity and excellent enantioselectivity.
目前报道的催化不对称Mannich反应的有机催化剂主要有脯氨酸及其衍生物、手性磷酸、手性(硫)脲和金鸡纳碱衍生物等,取得了良好的催化活性和对映选择性。
3.
High yields and excellent enantioselectivity were achieved in asymmetric or- ganic reactions involving imines,such as asymmetric Mannich,reductive amination,Pictet-Spengler, aza-Diels-Alder,aza-ene reactions and so on.
手性磷酸是近年来发展起来的一类新型高效、高对映选择性的Br(?)nsted酸类有机催化剂,已成功应用于催化不对称Mannich反应、还原胺化反应、Pictet-Spengler反应、aza-Diels-Alder反应和aza-Ene反应等许多重要的有机合成反应。
5)  diastereoselectivity
非对映选择性
1.
The different selectivities,including chemoselectivity,regioselectivity,syn/trans selectivity,diastereoselectivity,and enantioselectivity,of organic reactions under the microwave-assisted and conventional heating conditions are reviewed.
本文综述了微波辅助下有机化学反应的选择性,包括化学选择性、区域选择性、顺反选择性、非对映选择性和对映选择性,与传统加热条件下反应选择性的区别。
2.
Epoxidation of 4-acetamidocyclopentene furnished good diastereoselectivity comparable to that of allylic ones.
但对于高烯丙位酰胺基取代的环戊烯环氧化的非对映选择性则取决于具体的酰胺基:4-乙酰胺基环戊烯得到与烯丙位系列类似的很好的顺式选择性,但是4-苯甲酰胺基环戊烯环氧化的选择性变差。
3.
Three strategies (additive, chiral auxiliary or chiral reagent) were developed to improve the diastereoselectivity or enantioselectivity of the ylide cyclopropanation reactions.
通过添加剂、手性辅基、手性试剂等 3种策略,分别控制反应的非对映选择性和对映选择性。
6)  Enantioselectivity
对映体选择性
1.
Theoretical Studies on Asymmetric Boron-catalyzed Reaction(Ⅰ) The Enantioselectivity in Oxazaborolidine-catalyzed Reductions of Phenyl Ethyl Ketone;
不对称硼催化反应的理论研究(Ⅰ)——噁唑硼烷催化苯基乙酮还原反应的对映体选择性机理
2.
This review emphasizes some important aspects for the control of lipase enantioselectivity: medium engineering,substrate engineering,modification of enzyme and directed evolution.
文章讨论了调控脂肪酶对映体选择性的几种方法:反应介质工程、底物分子工程、酶分子修饰和定向进化。
3.
The influence of substituents on the enantioselectivity in asymmetric branched oxazaborolidine catalyzed reductions of phenyl ethyl ketone has been studied by using AM1 MO method and transition state theory.
用AM1方法和过渡态理论研究了取代基对含侧链手性唑硼烷催化还原苯基乙基酮对映体选择性的影响 。
补充资料:非对映异构选择性
分子式:
CAS号:

性质:属立体选择性之一。系指含有一个手性中心的反应物,在手性叫小心的诱导下构成第二个手性中心时,生成的非对映异构体之一比另一非对映异构体多。这种量上的差异称为非对映异构选择性。例如,下述手性化合物中的羰基用氢化铝锂(LiAlH4)还原时,生成的非对映异构体之一可达98%。

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