查询词典 hazel alder

The applications of various organocatalysts in asymmetric Diels-Alder reaction and the asymmetric induction mechanism are reviewed in this paper. Contents

本文对各类有机催化剂在有机催化不对称Diels-Alder反应中的应用研究进展，以及不对称诱导反应的机理进行了评述。

Diels-Alder reaction has a huge applied value as their high regional selectivity and stereoselectivity .

Diels-Alder 反应，因其很高的区位和立体选择性而具有巨大的应用价值。

The high yield(53%) of Diels-Alder reaction of alkylthiofuran with alkylacetylenedicarboxylate is observed when used PF6 ionic liquid.

研究表明，呋喃类化合物的极性越低， Diels-Alder 反应的活性越高。

The key steps included Diels-Alder reaction to establish the molecular skeletion of diphyllin and the selective reduction.

关键步骤是确定diphyllin分子的骨架的Diels-Alder反应和选择性还原反应。

2, 3-Naphthalocyaninatocobalt compounds, a new type of functional materials, have been successfully prepared by using of Diels-Alder reaction.

采用Diels-Alder方法合成了2，3-萘二腈和6，7-二溴-2，3-萘二腈化合物，并以此为前体成功地合成了相应的钴萘酞菁系列化合物---一种新型的功能有机材料。

Because of the good regio-and stereoselectivity, Diels-Alder reaction has become the important tool of synthetic chemistry and significant object of theoretical study.

Diels—Alder反应由于其良好的区位和立体选择性而成为合成化学的重要工具及理论研究的重要对象。

In the synthetic reaction process dicyclopentadiene is a terminal group sealing agent,and there is no Diels-Alder addition reaction taking place.

在合成反应过程中二聚环戊二烯是端基封闭剂，无Diels-Alder加成反应发生。

Diels-Alder reaction has been one of the cornerstone reactions in organic chemistry for the construction of six-membered rings and the formation of carbon-carbon binds.

Diels-Alder 反应是有机化学中建构六员环和碳碳键生成最为重要的反应之一。

In the second part, a fully functionalized C-ring synthon was synthesized by asuccessful use of a known intramolecular Diels-Alder reaction.

第二部分我们运用一已知分子内DielS-Alder反应成功地进行了官能化的Taxol C环片断的合成。

Diels-Alder reaction has been one of the cornerstone reactions in organicchemistry for the construction of six-membered rings and the formation ofcarbon-carbon binds.

Diels-Alder 反应是有机化学中建构六员环和碳碳键生成最为重要的反应之一。

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。