查询词典 hazel alder

This synthetic strategy is based on the combination of different polymerizations, especially controlled polymerizations, and the combination of different controlled polymerizations with coupling reactions, such as "click" reactions, Diels-Alder reaction and active ester reaction etc..

这一合成方法的思路是基于将不同聚合反应，尤其是不同可控聚合反应相结合，或者将可控聚合与不同的偶合反应，例如与点击反应、Diel-Alder反应和活性酯反应等相结合。

In the first chapter, two reviews on the synthesis of nitrogen compounds fromcarbohydrates and the synthesis of pyridines by Diels-Alder reaction were introducedrespectively.

第一章简要介绍了以碳水化合物为原料合成含氮杂环化合物的研究进展和以Diels-Alder反应合成吡啶类化合物的研究进展，确定了本论文的研究课题。

Maleopimaric acid can be synthesized by Diels-Alder reaction from rosin and maleic anhydride by phosphato-molybdic acid .

以杂多酸磷钼酸为催化剂合成了马来海松酸。

A noteworthy one is that we have obtained the Fukui function and local softness of πbond region for the first time, only by which we can explain and predict theregioselecitivity of Diels-Alder reaction etc.

可见原子-键电负性均衡方法中的σπ模型不仅具有简便易行的优点，而且得到的各种反应标度或稳定性指标具有计算简便、概念直观、易于使用等特点。

Synthesis of tricyclopentadiene Two methods of polymerization were analyzed in the synthesis of TCPD: thermal polymerization of DCPD, Diels-Alder reaction of DCPD and cyclopentadiene.

三环戊二烯的合成采用两种方式对TCPD的合成进行了研究：DCPD直接热聚法、DCPD与环戊二烯双烯加成法。

It is widely used in the abroad, but there is no manufacture factory demestic.Dimethyl benzene as solvent, Hexachlorocyclopentadiene react with 1,5-cyclooctadiene by the Diels-Alder reaction, this is the common method to prepare DCRP.

得克隆即双环辛烷，含有脂环族氯，它是一种性能优异的阻燃剂，在国外正得到广泛的重视和应用，但目前我国还没有研制和生产厂家。

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

It is widely used in the abroad, but there is no manufacture factory demestic. Dimethyl benzene as solvent, Hexachlorocyclopentadiene react with 1,5-cyclooctadiene by the Diels-Alder reaction, this is the common method to prepare DCRP.

得克隆即双环辛烷，含有脂环族氯，它是一种性能优异的阻燃剂，在国外正得到广泛的重视和应用，但在我国还没有生产厂家。

Furthermore, the effects of ligands, metal and reaction time on the reaction were also researched, and the process of new ligand-metal catalysis for Diels-Alder reaction was also analyzed according to Evans" square planar mode and Corey"s tetrahedral manner.

我们对影响配体对映选择性能的各种因素，如配体结构、金属离子、反应时间等进行了研究，而且根据Evans的平面四方形模式与Corey的四面体过渡态理论为新配体—金属配合物催化的该反应提出了可能的反应机理，并对产物的优势构型作了理论分析。

This dissertation is concerned with the approaches to a new high density liquid fuel, tetrahydrotricyclopentadiene, which can be synthesized with dicyclopentadiene as raw materials by three steps: Diels-Alder reaction, separation and hydrogenation. The main points of the paper are listed as follows.

本文以双环戊二烯为原料，通过双烯加成、分离、加氢反应得到目的产物——新型高密度液体燃料四氢三环戊二烯，主要研究内容包括： 1。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。