亲电加成

茂环上环戊烯基的双键与HBr和卤素发生正常的亲电加成反应。

The double bond of cyclopentenyl on Cp with HBr , halogen underwent normal electrophilic addition reaction .

电化学氧化降解中C-Cl键断裂是羟基攻击苯环发生亲电加成反应的结果，继而提出还原脱氯和氧化降解结合的工艺。

For electrochemical degradation of 4-CP , the C-Cl bond was broken and chlorine ion was taken away from the benzene ring as a result of electrophilic addition reaction of hydroxyl radical . The combination technologies of reduction dechlorination and oxidation degradation were proposed .

~（13）C化学位移与不对称烯烃的亲电加成

Carbon 13 chemical shift and the eletrophilic addition of asymmetric olefins

亲电加成，它是成环的主要反应；

Electrophilic addition , which is the principal reaction of cyclization ;

不对称烯烃亲电加成中几种反马氏规则的类型

Several Conditions against Markovnikov ' Rule on Electrophilic Addition to Unsymmetrical Alkenes

烯烃、炔烃亲电加成反应难易探讨

Several problems on the electrophilic addition reaction of alkenes

因此，上述亲电加成由桥型离子和开放离子的平衡所决定。

Both stereo-and regio-chemistry ar dominated by the equilibrium between the bridged and open ions .

其合成一般是以苯胺和六氟丙酮为起始原料，经过亲电加成、酰化和还原三步反应。

Synthesis of the substance from aniline and hexafluoroacetone involves electrophilic addition , acylation and reduction .

介绍了烯烃与卤化氢的亲电加成反应中四种反马氏规则的类型，并作出了理论解释。

Four conditions against Markovnikov'rule on electrophilic addition to alkenes and alkyl halides are discussed , and a theoretical explanation is made as well .

第二、我们成功地在离子液体[Bmim][BF4]、[Bmim][PF6]中实现了选择性进行吡咯的亲核取代和亲电加成反应。

Second , we completed the selective N-alkylation and electrophilic addition of pyrrole ionic liquids [ Bmim ] [ BF4 ] , [ Bmim ] [ PF6 ] .

焦脱镁叶绿酸a甲酯与溴素的亲电反应表明：在3位乙烯基上发生亲电加成反应，而与20位的meso氢则发生亲电取代反应。

The electrophilic reaction of methyl pyropheophorbide-a ( MPP-a ) demonstrates that the electrophilic addition reaction and the electrophilic substitution reaction occur on the vinyl group at 3-position and 20-meso-position , respectively .

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 .

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 .