对映选择性,enantioselectivity
1)enantioselectivity对映选择性
1.Control of biocatalysisenantioselectivity;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 excellentenantioselectivity.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 excellentenantioselectivity 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。
英文短句/例句
1.Stereoselective and Enantioselective Synthesis of Trans-2, 5-disubstituted Tetrahydrofurans反式-2，5-二取代四氢呋喃的立体选择性和对映选择性合成
2.Enantioselective Reduction of Aromatic Ketones Using Celeriac as Biocatalyst用芹菜茎生物催化对映选择性还原芳香酮
3.Enantioselective recognition of chiral diphenic acid-based molecular clefts for amino acid derivatives手性联苯二甲酸分子裂缝对氨基酸衍生物的对映选择性识别
4.Catalysis: Development of chirometallopor-phyrins as enantioselective oxidation catalysts of alkenes and sulfides.催化作用：开发新型手性金属催化烯类及硫醚类之对映选择性氧化。
5.The Enantioselective Interaction between Lipase with Chiral Phenoxypropionic Acid Herbicides;脂肪酶与手性苯氧丙酸类除草剂的对映选择性相互作用
6.Studies on Diastereoselective Total Synthesis of (+)-Biotin and Their Relative Reaction;（+）-生物素非对映选择性全合成及其相关反应的研究
7.Study on Stereoselective Glucuronidation of Propranolol Enantiomers;普萘洛尔对映体葡醛酸化立体选择性代谢研究
8.Improve the Enantioselectivity of Lipase A of Bacillus Subtilis by Site-directed Mutagenesis;定点突变提高枯草杆菌脂肪酶A的对映体选择性
9.Enantioselective separation of lambda-cyhalothric acid enantiomers by chiral extraction with tartaric esters酒石酸酯立体选择性萃取分离功夫菊酸对映体
10.You can improve the performance of slide show by selecting options in the Performance area of the Set Up Show dialog box.通过选择“设置放映方式”对话框中的性能选项，可以改善幻灯片放映性能。
11.Study on Enantioselective Cytotoxicity and Pesticidal Activity of Bifenthrin联苯菊酯的细胞毒性及杀虫活性的对映体选择性研究
12.Enantioselective Binding of Chiral Drugs to Plasma Proteins;手性药物对映体与血浆蛋白结合的立体选择性研究
13.Enantioselectivity in Endocrine Disruption of Two Typical Chiral Pesticides;两种典型手性农药内分泌干扰效应的对映体选择性研究
14.Enantioselective Toxicity and Degradation of Some Endocrine Disrupters;几种内分泌干扰物的对映体选择性毒性及其降解
15.Enantioselective Separation of Fenvaleric Acid Enantiomers by Chiral Extraction with Lipophilic L-iso-butyl-L-tartaric Esters疏水性L-酒石酸异丁酯立体选择性萃取拆分氰戊菊酸对映体
16.Enantioselective degradation characteristics of chiral organophosphorous insecticides in soil手性有机磷农药在土壤中对映体选择性降解特征
17.Effect of Cyclodextrins on the Enantioselective Inhibition between Isomalathion and Acetylcholinesterase;环糊精对异马拉硫磷对映体选择性抑制乙酰胆碱酯酶的影响
18.Stereoselective Effects and Mechanisms of Doxazosin Enantiomers on Lower Urinary Tract in the Rat and Guinea Pig;多沙唑嗪对映体缓解下尿道阻力的立体选择性及其作用机制
相关短句/例句
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 theenantioselective 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.Theenantioselective 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。
3)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 gooddiastereoselectivity 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 thediastereoselectivity 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。
4)Enantioselectivity对映体选择性
1.Theoretical Studies on Asymmetric Boron-catalyzed Reaction(Ⅰ) TheEnantioselectivity 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 。
5)enantioselective addition对映选择性加成
1.Optically pure 7,7"-disubstituted binaphthols were synthesized and used in theenantioselective addition of diethyl zinc to aldehydes to afford the corresponding alcohols with 54%~88% yields and up to 88% ee.合成了一类光学纯的7,7’-二取代联二萘酚,并将其用在乙基锌对醛的对映选择性加成,以54％-88％的产率和最高88％的对映选择性得到了光学活性的1-苯基-1-丙醇。
6)Enantioselective recognition对映选择性识别
延伸阅读
对映选择性分子式：CAS号：性质：外消旋对映体混合物与另外一种光学活性分子反应时，一种对映体优先进行反应的选择性。生物体内化学反应多是对映选择性的。例如，消旋乙酰丙氨酸在酶作用下L型对映体水解速度远大于D型对映体。在外消旋单体的不对称聚合反应中，催化剂也具有对映选择性。例如：外消旋环氧丙烷(或环硫丙烷)在二乙基锌/(+)冰片等引发剂作用下，只单体选择性聚合，生成具有光学活性的聚合物。未反应单体主要是S单体。
