substitution reaction

Amines can engage in nucleophile substitution reaction with alky.

胺能参加与卤代烷的亲核取代反应.

The paper shows the relationship between the change of configuration turning and configuration marking, in bimolecular nucleophilic substitution reaction, according to the change order of group.

以基团次序地位变化为线索，揭示双分子亲核取代反应中，构型翻转与构型标记变化的关系。

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.

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。

Studies on Use of NMR for the Aromatic Electrophilic Substitution Reaction

NMR在芳基亲电取代反应中的应用研究

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.

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。

High Selective Nucleophilic Substitution Reaction of 4,4 ′-bipyridine Under Solvent-free Conditions

无溶剂4,4′-联吡啶高选择性亲核取代反应

The influences of reactant ratio, reaction temperature, reaction time on substitution reaction were studied. The better reaction conditions were obtained: molar ratio of trityl chloride and cuprous cyanide was 1:1.3, reaction temperature was at 130 ℃, reaction time was 2.5h.

并通过对原料配比、反应温度和反应时间的研究，得到了较佳的合成工艺条件：三苯基氯甲烷与氰化亚铜的最佳摩尔比为1：1.3，反应温度为130℃，反应时间为2.5小时。

Ionic liquid [ BMIM] PF6 can play a catalyst role in nucleophilic substitution reaction.

离子液体[BMIM]PF6可以起到一定的催化剂作用，有利于亲核取代反应的进行。

When it came to the substitution degree of NaCS, it increased with increase of reaction time gradually, and kept about 0.5 from 6 h. In addition, the degradation of NaCS by cellulose decreased with the increase of the preparation time of NaCS.

NaCS的取代度随着反应时间先逐渐增大，到6h后，取代度保持在0.5左右。通过纤维素酶降解实验可知，NaCS的降解性随着其制备时间的增加而呈现逐渐下降的趋势。

Effects of Ambident Nucleophiles in the Nucleophilic Substitution Reaction

两可亲核试剂在亲核取代反应中的作用

Hydrolysis of ester groups of HEMA occurred during the nucleophilic substitution reaction and post-processing.

HEMA在亲核取代及后处理过程中，酯键会发生水解，造成侧链上部分双键的丢失。

At the same time, discuss about the impact factor to nucleophilicity such as the number of attract electron group 、 ability of attract electron and the nucleophilic substitution reaction part.

并且对亲核试剂的体积效应、溶剂效应对亲核性影响，底物上吸电子基团的数目、吸电子能力对亲电性的影响，以及亲核取代反应的发生部位受哪些因素影响进行探讨。

The conjugated double bond in tung oil molecular with high activity can take place substitution reaction with one of ortho or para hydrogens of phenol.

桐油的共轭双键具有极强的反应活性，易与苯酚芳环上邻或对位的活性氢发生傅氏取代反应。

METHODS 18F-FDG was synthesized via nuclear reaction 18O ( p, n) 18F on 18O-enriched water and nucleophilic substitution reaction by Tracerlab Mx FDG synthesis system.

方法应用小型回旋加速器，通过18O（p，n）18F核反应生产出18F离子，由亲核取代反应制备18F-FDG，并对所制备的18F-FDG注射液进行质量控制。

Recent progress on Vicarious nucleophilic substitution reaction

Vicarious亲核取代反应研究进展

Two derivative dyes from the parent dyes were obtained by nucleophilic substitution reaction in which two primary aminophenol were employed as the nucleophilic reagent.

将母体染料的中位氯原子用氨基酸试剂亲核取代，衍生合成了两个中位氨基酸取代的七甲川菁染料。

Four new dyes with thio group substitution in the central position were synthesized from the parent dye by nucleophilic substitution reaction.

在母体染料的中位用含-SH基团试剂亲核取代，衍生合成了四个中位硫取代衍生染料。

Extending reaction time or temperature is beneficial to the nucleophilic substitution reaction of nitrochlorobenzene.

此时，延长体系的反应时间、提高体系的反应温度都有利于对硝基氯苯的亲核取代反应的进行。

In the substitution reaction of nucleophilic, whatever we use S_N1 or S_N2 reaction course, the rate of reaction is the most rapid.

在亲核取代反应中；无论按S N1历程还是S N2历程，烯丙式卤代烃的反应速度都是最快的。

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

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。

The oxidation reaction consists of nucleophilic substitution reaction and a-elimination reaction which is the rate-determining step.

氧化反应由亲核取代反应和α-消除反应组成，α-消除反应是反应的速率控制步骤。

Advances in Gas-Phase Electrophilic Aromatic Substitution Reaction

气相芳香亲电取代反应研究进展

A new method for calculating atomic charges in molecules and quantitative treatment of the orientation effect of electrophilic aromatic substitution reaction

计算分子中原子净电荷的新方法及芳烃亲电取代反应定位效应的定量处理

Method ( 2H)-2-cyclohexyl-3,4-dihydropyrrolo [ 1,2-a] pyrazin-1-one was synthesized from methyl pyrrole-2-carboxylate via substitution and cyclization, and the target compounds 6-aryl derivatives were obtained by Friedel-Crafts reaction.

方法以2-吡咯甲酸甲酯为原料，经取代、环合，制备（2H）-2-环己基-3,4-二氢吡咯[1,2-a]吡嗪-1-酮（3）；通过Friedel-Crafts酰基化反应，制得其6-酰基衍生物4a~4j。

On the Problem of Bimolecular Nucleophilic Substitution Reaction Sterochemistry

双分子亲核取代反应立体化学问题释疑

The rearrangement of allylic double bond took placed in the course of these reaction. 6& 12 are able to undergo a lot of electrophilic substitution reaction.

产物是双键经过重排的取代烯丙基二甲基甲氧基硅烷6&10，该产物可进行一系列亲电取代反应。

The rule for aromatic nucleophilic substitution reaction and the electronic effect on the reaction

芳香族亲核取代反应及电子效应的影响

The Relation between~ 1H-NME δ and Electrophilic Substitution Reaction of Aromatic Hydrocarbon

~1H-NMR化学位移与芳烃亲电取代反应

Nucleophilic Substitution Reaction on the Porphyrin Ring: 2. The Solvent Effect in the Reaction of 2-NO_2-TPPCu(ⅱ) with Sodium Phenoxide

卟啉环上的亲核取代：2.溶剂对2-NO2-TPPCu（Ⅱ）与苯酚钠反应的影响

The nucleophilic aromatic substitution for hydrogen reaction is an environmentally benign organic synthesis reaction.

芳香亲核取代氢反应是一种环境友好的有机合成反应.