查询词典 asymmetric

Chiral amine-protonic acids are highly efficient and excellent enantioselective organocatalysts developed in recent years. They have been successfully applied to a number of enantioselective organic reactions, such as asymmetric aldol condenstion, Michael addition, Diels-Alder cycloaddition, Strecker reaction and so on.

手性胺-质子酸是近年来发展起来的新型高效、高对映选择性的有机催化体系，已成功应用于催化不对称Aldol反应、Michael加成反应、Diels-Alder反应和Strecker反应等许多重要的有机合成反应。

The Research about the Synthesis of Phenylsulfonyl α,β-unsaturated Ketones and Their Applications in Asymmetric Diels-Alder Reaction Catalyzed by Lewis Acid and Chiral Titanium Reagents.

苯磺酰基取代的α，β-不饱和酮的合成及其在不对称催化Diels-Alder反应中的研究中文名称：苯磺酰基取代的α，β-不饱和酮的合成及其在不对称催化Diels-Alder反应中的研究

To the preparation of the side chain, we exploit Sharpless Asymmetric Epoxidation, Grignard reagent epoxide opening and selective hydroboration reaction as key steps.

在探索制备手性六元环的过程中，发展了一种高效制备手性砌块49的方法，并利用乙烯基格氏试剂对49的不对称Michael加成制备了手性六元环56。

I then examine three major naturalistic theories in this field: Millikan's "teleological approach", Fodor's "asymmetric dependence account", and Dretske's "distinctive learning stages account".

本文接著检验三个主要的自然主义化约论式的心理理论：蜜莉肯的「生物目的论」，佛德的「非对称性依赖关系理论」，以及爵斯基的「学习时期理论」。

In Chapter 4, we study the Lagrange stability for two asymmetric non-conservative systems.

在第四章中，突破了这样的限制，不要求系统对于位置变量是对称的，证明了非对称的非保守系统解的Lagrange稳定性和大振幅的拟周期解的存在性。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。