Chlorine atoms were selectively introduced into the chlorin ring based on different reactivity between vinyl group at 3-position and 20-meso position by electrophilic addition and electrophilic substitution using hydrogen peroxide/hydrochloric acid, N-chlorosuccinimide, hydrogen chloride (or concentrated hydrochloric acid) as chlorinating reagent.
以过氧化氢/盐酸、N-氯代丁二酰亚胺、氯化氢为氯化剂，根据3-乙烯基和20-meso-位的不同化学反应活性，通过亲电加成和亲电取代反应，在二氢卟吩环上选择性地引进氯原子，完成8种未见报道的具有叶绿素-a基本碳架的氯代二氢卟吩衍生物的合成。
Every compound has the most negative net charge value and the lowest chemical shift value. Qmin and δmin are found to belong to the same carbon atom which is on ortho-position of phenolic hydroxyl group, then the carbon atom has the highest reactivity in nucleophilic-electrophilic reaction.
每种化合物均有最负净电荷与最低化学位移，Qmin与δmin出现在酚羟基邻位同一碳原子上，而这一碳原子具有最大的亲核亲电反应活性。
Ten sulfo-group containing compound were tested whether they could be used as the phase transfer catalyst for the electrophilic substitution in the solution of H2O/CH3COONa-CH3COOH/ClCH2Cl by measuring the coupling reaction rate constant.
对比无催化剂存在时的动力学数据，证明这类化合物是有效的亲电取代反应的相转移催化剂。
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 substituting position of electrophilic group accord with experimental value.
亲电基取代位置和实验值完全一致。
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。
Ten sulfo-group containing compound were tested whether they could be used as the phase transfer catalyst (PT CS) for the electrophilic substitution in the solution of H2O/CH3COONa-CH3COOH/ClCH2Cl by measuring the coupling reaction rate constant.
选择了10个含磺酸基团的化合物作为相转移催化剂，测定其在H2O／CH2COOH－CH3COONa／ClCH2Cl体系中的亲电偶合反应速率常数。
Conclusions GMA with electrophilic group could react with negatively charged centers on DNA and form GMA DNA adducts.
结论具有亲电子集团的GMA能与DNA带负电荷中心反应形成GMA-DNA加合物。
It is the product of DNA covalently binding with the electrophilic group of compound, and is the most important and commonly mode of DNA damage.
它是由具有亲电基团的化合物或体内具有亲电基团的代谢产物与DNA共价键合所形成的化合物，是DNA化学损伤最重要和最普遍的形式。
The treatise advances a new method to judge two kinds of fixed group of benzoic ring on electrophilic substitutive reaction in benzoic ring.
对苯环上的亲电取代反应提出一种判断苯环上两类定位基的新方法。
The speed of electrophilic addition reaction of Alkene is well-connected to the nature of substituting group on C=C.
对于烯烃的亲电加成反应速度，与C=C上直接连接的取代基的性质有关。
A series of novel poly(aryl ether sulfone ether ketone ketone)s with methyl pendant group was prepared from 2, 2'-Dimethyl - 4, 4'-Diphenoxydiphenylsulfone (o-CH3-DPODPS)or 3, 3'-Dimethyl-4, 4'-Diphenoxydiphenylsulfone (m-CH3-DP--ODPS) and Terephthaloyl or Isophthaloyl by electrophilic polycondensation in the presence of N, N-Dimethylformamide with anhydrous A1C13 as a catalyst and in 1, 2-dichloroethane.
1。用邻甲酚或间甲酚与4，4'-二氯二苯砜合成2，2'-二甲基-4，4'-二苯氧基二苯砜(o-CH_3-DPODPS)或3，3'-二甲基-4，4'-二苯氧基二苯砜(m-CH_3-DPODPS)，然后与对苯二甲酰氯或间苯二甲酰氯进行缩聚，得到一类新型含甲基侧基的聚芳醚砜醚酮酮聚合物。