亲核取代反应

而当R为吸电子基团-CHO、-COCH3时，主要发生分子内氮原子上的亲核取代反应，产物为含氮的五员杂环化合物。

In contrast , electro-withdrawing groups CHO and COCH_ 3 on the attacking site will favor the intramolecular nucleophilic substitution of nitrogen and form 5-membered heterocyclic compounds .

Vicarious亲核取代反应研究进展

Recent progress on Vicarious nucleophilic substitution reaction

卤代烷亲核取代反应的一种新机理&S（RN）1

A New Mechanism of Nucleophilic Substitution Reactions for Alkyl Halides & S_ ( RN ) 1

提出自由基IPSO亲核取代反应机理。

A radical IPSO substitution mechanism is proposed .

芳香族硝基化合物与苯硫酚钠盐的亲核取代反应&自由基IPSO取代机理

Studies on the Reaction of Aromatic Nitro Compounds with Sodium Phenylthiolate & Radical IPSO Substitution Mechanism

在亲核取代反应中；无论按SN1历程还是SN2历程，烯丙式卤代烃的反应速度都是最快的。

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

最终产物的ee值与中间体α-羟基酮十分接近，表明在所发生的亲核取代反应中基本没有消旋化得现象发生。

The ee values of the final products were very close to those of α - hydroxy ketones , which indicated that no racemization occurred in the substitution .

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。

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 .

这套客观的取代基常数用之于芳香亲核取代反应不比Miller从该反应系中求出的数值差。

This set of objective substituent constants can also be applied to aromatic nucleophilic substitution not any less adequately than that derived by J. Miller right from this very type of reactions .

水解反应的可能机理是SNl和SN2.双分子亲核取代反应立体化学问题释疑

The mechanisms of the hydrolysis were proposed to be unimolecular nucleophilic substitution and bimolecular nucleophilic substitution ( SN2 ) . On the Problem of Bimolecular Nucleophilic Substitution Reaction Sterochemistry

氢的替代亲核取代反应（VNS）是与硝基芳环的亲电反应、亲核反应不同的一种新反应。

Vicarious nucleophilic substitution ( VNS ) of hydrogen is a new type of reaction which is differ-ent from the usual electrophilic and nucleophilic reactions of the nitro arenes .

以磷酰氯为原料通过与手性仲胺的亲核取代反应高产率地合成了手性HMPA类似物。

The chiral HMPA analogues 1 and 2 were prepared in high yield by nucleophilic substitution between the chiral secondary amine and phosphoryl chloride .

然后F-AQN-OPEG-OMe与奎尼丁的锂盐再进行亲核取代反应，以91.7%的产率得到新型手性配体QD-AQN-OPEG-OMe。

Then , QD-AQN-OPEG-OMe was synthesized in 91.7 % yield by reaction of F-AQN-OPEG-OMe with the lithium salt of quinidine .

核磁跟踪测试表明，HCCP和BPS进行的是双分子亲核取代反应（SN2），三乙胺（TEA）在反应中不仅作为缚酸剂，而且还起着活化BPS、促进亲核进攻的作用。

1H NMR monitor of the polycondensation showed that TEA acted as not only acid-acceptor but also catalyst to activate BPS for nucleophilic substitution . And condensation between HCCP and BPS followed a bimolecular nucleophilic substitution ( S_N2 ) pattern .

由于单分子亲核取代反应（SN1）经过了碳正离子中间体的历程，所以得到的产物是外消旋的。

In the reaction mechanism of unimolecular nucleophilic substitution ( SN1 ), it can produce carbocations which can easily lead to the racemization of the products .

进行了动力学研究，获得了反应活化能和各反应温度下的反应速率常数，同时研究结果表明烯丙基化反应级数为2，反应机理为SN2亲核取代反应。

The activation energy and rate constant of the allylation reaction was calculated in virtue of kinetic study . The kinetics study indicated that the allylation reaction of polyether was second order and its reaction mechanism was SN2 nucleophilic substitution .

氢键活化的苯环上C-F键的亲核取代反应研究亲核取代法制备壳聚糖6-OH固载环糊精衍生物

Study of Nucleophilic Substitution Reaction of C-F Bond on a Benzene Ring under Activation of Hydrogen Bond PREPARATION OF CHITOSAN IMMOBILIZED WITH β - CD AT C_6 POSITION BY A NUCLEOPHILIC DISPLACEMENT REACTION

苯甲酰氯亲核取代反应的热动力学研究

Study on the thermokinetics for nucleophilic substitution reactions of benzoyl chloride

离去基的电子效应在芳香族双分子亲核取代反应中的作用

The action of electronic effect of leaving groups on S _NA_r reactions

离子液体在亲核取代反应中的应用

The Use of Ionic Liquids in the Nucleophilic Displacement Reactions

3－氨基－1，2，4－三唑与苦基氯的亲核取代反应动力学研究

Kinetics of the Nucleophilic Substitution of 3-Amino-1,2,4-Triazole with Picryl Chloride

氯苯亲核取代反应的量子化学研究初步

Quantum Chemistry Research for the Nucleophilic Displacement Reaction about Monochlorobenzene

胺能参加与卤代烷的亲核取代反应。

Amines can engage in nucleophile substitution reaction with alky .

双分子亲核取代反应立体化学问题释疑

On the Problem of Bimolecular Nucleophilic Substitution Reaction Sterochemistry

溶剂对亲核取代反应速率的影响

Solvent 's Influence on Nucleophilic Substitution Reaction 's Rate

两可亲核试剂在亲核取代反应中的作用

Effects of Ambident Nucleophiles in the Nucleophilic Substitution Reaction

无溶剂4,4′-联吡啶高选择性亲核取代反应

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

以亲核取代反应制备质子交换膜用磺化聚酰亚胺

Synthesis and Characterization of a Novel Sulfonated Polyimide Used as Proton Exchange Membrane

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。

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

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。

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