亲电试剂

这种物品就是一般听说的亲电试剂。

Such species are referred to by the general term electrophiles .

有机锡试剂和有机亲电试剂的交叉偶联反应及其在有机合成中应用的研究进展

Progress in research on the cross-coupling reactions of organotin reagents with organic electrophiles and its application to organic synthesis

CO2可作为亲电试剂与碳亲核试剂进行羧化反应制备有机羧酸或羧酸酯。

CO2 usually serves as electrophile in the carboxylation of nucleophilic organometallic reagents to synthesize carboxylic acid and esters .

综述了钯催化Stille交叉偶联反应的最新研究进展，主要包括三个方面：（1）有机锡化合物与有机亲电试剂如卤代芳香烃、卤代烷烃、酰氯等的反应；

Recent development of the palladium-catalyzed Stille cross-coupling reactions is reviewed , which includes ( 1 ) the reactions of organotin compounds with organic electrophilic reagents such as aro-matic halides , alkyl halides , and acyl chlorides etc.

和生成手性产物的任何反应一样，不对称信息可能存在于影响MBH反应的四个组分的任何一个中，即光学活性的活化烯，亲电试剂、催化剂和溶剂。

And just like the generation of chiral product of any reaction , asymmetric information may be affected in the MBH reaction of any one of the four components , so the activation-optically active , electrophilic reagents , catalyst and solvent .

甘氨酸等价物与1，2-亲电试剂烷基化成环；

( 2 ) Alkylation of a glycine equivalent with a 1,2-electrophile ;

此外也尝试了利用最初形成的烯胺中间体与一些亲电试剂发生串连反应，但未能取得成功。

Attempts to trap the enamine intermediate with several electrophilic reagents were not successful .

不活泼的亲电试剂在较高温度下也能较好的进行。

While the inactive electrophilic reagents can take place the reaction at high temperature also .

因为反应是由亲电试剂的附加而开始的，所以这个过程叫做亲电加成反应。

Because the reaction initiated by the attachment of an electrophile , the process is called an electrophilic addition reaction .

然而，迄今为止仍没有重氮酰胺参与的基于亲电试剂捕捉活性离子对中间体的反应报道。

So far , there is no report focus on using electrophilic reagents to capture active zwitterionic intermediates derived by diazo amides .

与亲电试剂醛反应，得到砜基取代的含烯丙醇结构单元的四取代烯烃。

The reaction of α - sulfonyl vinyl magnesium reagents with aldehydes afforded tetrasubstituted alkenes containing the structural unit of allyl alcohols .

甲氧基物种的甲基作为一种亲电试剂，可以直接进攻苯环发生亲电取代烷基化反应生成甲苯。

As an electrophilic agent , the methyl group of methoxy species can directly attack benzene ring to produce toluene via electrophilic substitution reaction .

在钯催化下，有机锡试剂与亲电试剂进行偶联，条件温和，收率高。

The cross-coupling reactions of organotin compounds with organic electrophiles , catal - yzed by palladium , take place under mild conditions in high yields .

本论文主要包括以下五个方面：1.综述了有机锡化合物与亲电试剂的两种交叉偶联反应&直接偶联反应和羰基化偶联反应。

Summarized two kinds of cross-coupling reaction of organic tin compounds with organic electrophile , which is direct coupling reaction and carbonylation coupling reaction . 2 .

通过共催化策略的引入，可以调节亲电试剂的反应活性，高选择性地合成单一立体构型的手性分子，实现该类多组分反应的选择性控制。

With the co-catalytic strategy , adjust the reactivity of electrophile , the selectivity of the multi-component reactions was controlled efficiently and high enantioselectivity of the products achieved .

缺电子共轭体系作为亲电试剂可参与多种环化反应，而膦催化下其参与的环化反应却鲜有报道。

Electron-deficient conjugated systems are often involved in a variety of annulation reactions as electrophiles . However , the phosphine-catalyzed annulations of electron-poor conjugated systems are rarely touched .

第一部分，我们用较活泼的亲电试剂N-全（多）氟苯基芳香亚胺进行aza-Baylis-Hillman反应，取得了较好的结果，反应速度也很快。

In order to overcome the problem of slow reaction rate of the Baylis-Hillman reaction , we employed per - ( or poly ) fluorophenyl aromatic aldimines as the electrophiles .

将此方法应用于其他碳格氏试剂与亲电试剂，得到如下结论：活泼亲电试剂较容易进行此类反应，但加入亲电试剂的温度需在较低温度下进行，防止副反应。

The application of this method to other C Grignard reagents and electrophilic reagents give the following results : active electrophilic reagents can carry through the reaction more easily , but require low temperature to reduce the by-products .

在分析多种偶联剂偶联机理的基础上，本文采用含可聚合基团的亲电试剂作偶联剂，合成碳-碳键偶联溶聚丁苯共聚物，以改善其综合性能。

In this paper , new diene-styrene copolymers coupled through carbon-carbon bond with novel coupling agent - acryloyl chloride , were synthesized , and the mechanical properties and dynamic viscoelastic properties of the polymers were improved to some extent .

亲电氟化试剂，尤其是对映选择性亲电氟化剂近年来发展较快，成为氟化研究和应用的重要领域。

Electrophilic , especially enantioselective electrophilic fluorinating agents were developed quickly in recent years , and there were important aspects of fluorination researches and applications .

在有机路易斯碱催化下，这类烯丙基衍生物容易与亲核试剂发生烯丙基烷基化反应；也可以在叔膦催化下，实现与多种亲电试剂的环加成反应。

Under the catalysis of Lewis bases , these allylic compounds readily undergo allylic alkylations with a series of nucleophiles ; under the catalysis of tertiary phosphines , various cycloadditions can be successfully achieved with electrophiles .

氯甲基化反应由亲电取代反应和亲核取代反应组成，亲核取代反应是反应的速率控制步骤，羟甲基碳正离子（+CH2OH）；是真正有效的亲电试剂。

The chloromethylation reaction consists of electrophilic substitution reaction and nucleophilic substitution reaction , the nucleophilic substitution is the rate-controlling step and the hydroxymethyl cation ( + CH20H ) is the really effective electrophile .