从而用微扰分子轨道理论半定量地解释了脂肪族的游离基取代和芳香族的游离基取代反应的反应性和选择性。
The reactivities and selectivities of aliphatic and aromatic free-radical(substitution)reactions were explained semi-quantitatively by the perturbation molecular orbital theory.
本文报导几种具有不同取代基的芳基丁炔醇的合成和苯基丁炔醇在不同催化条件下的反应性能。
The synthesis of a few Aromatic butynols with different substituting groups and reaction of Phenyl butynols under the different catalysis is described in this paper.
烷基取代的炔丙基硫缩酮衍生物，则能利用相对应的末端炔和碘烷亲电基进行取代反应所获得。
However, alkyl-substituted propargylic dithioacetals could be synthesized by the displacement reaction of the corresponding terminal alkynes with alkyl iodides.
由此可以看出，取代基的主本阻碍反应，是反映在违背动力学因素而不是热力学因素。
It follow therefore that the steric blocking effects of substituents are reflected in adverse kinetic, rather than thermodynamic factors.
在室温下，二茂铁甲酰基异硫氰酸酯与芳香胺反应生成新颖的二茂铁取代非对称硫脲。
At room temperature, several novel unsymmetric ferrocenyl thiourea compounds were synthesized by reaction of substituted aniline with ferrocenyl formyl isothiocyanate.
本文用自由基捕捉剂与esr相结合的方法系统研究了各种取代苯胺与二苯酮光化夺氢反应中的活泼自由基。
Active free radicals in the photochemical hydrogen abstraction reaction between benzophenone and aromatic amines have been studied systematically by combination of spin trapping reagents and ESR.
反应以自由基机理进行，溴取代主要发生在主链上的叔氢原子上。
Thesubstitution of bromine atoms is on the tertiary carbon of main-chain of the polymersprimally.
以硫酸基取代度和糖的质量分数为指标，采用L9(34)正交试验对反应温度、试剂配比和反应时间进行优选。
L9 (34) Orthogonal test was used to optimize the reaction temperature, reagent formula, and reaction time with the degree of sulfate group and carbohydrate content as index.
本文报道了以邻氯甲苯为原料，经光氯化、水解、取代三步合成2-甲酰基苯磺酸钠的方法，并对影响反应收率的因素进行了讨论。
Sodium 2-formylbenzenesulfonate was prepared from 2-chlorotoluene by photo-chlorination, hydrolysis and substitution reactions successively. Factors affecting the yields were discussed.
对2-H苯并咪唑盐与烃基为不饱和取代基的格利雅试剂的加成-水解反应进行了研究，将此反应应用到不饱和醛的制备。
The addition-hydrolysis reaction was applied to the synthesis of unsaturated aldehyde by the -reaction of 2-H benzimidazolium iodide with alkenyl magnesium bromide.
提出自由基ips O亲核取代反应机理。
丙酰基二茂铁和4-取代氨基脲反应制得8个相应的缩氨基脲1～8，它们均属首次制得。
Propionyl ferrocene reacted with 4-substituted semicarbazides converted into corresponding semicarbazones 1-8, which are not prepared previously.
因此，与芳基取代的烯丙基碳酸反应选择性。
Thus, the reaction with aryl-substituted allylic carbonates is regioselective.
研究发现，无论对于吸电子取代基还是供电子的取代基对烯基亚砜的活性都没有任何影响，而邻甲基苯醌前体化合物中所带有的吸电子基团能增加其反应活性。
It was found that both the electro-withdraw and electro-donating substituents have no effect on reaction activity and the electro-withdraw substituents can increase the reaction activity.
此外，还研究了不同取代基和催化剂五羰基合钨对反应机理及反应位垒的影响。
In addition, the catalytic effect of W5 and substitution effect on the reaction mechanisms and reaction barriers have also been considered.
三酯型乌头生物碱的C位乙酰基被各种长链脂肪酰基取代的酯交换反应为首次报道。
It is the first time to report that C8-acetyl is displaced by long chain fatty acyl for triester-aconitines in the ester-exchange reactions.
各种含有酮或醛的芳基三氟甲磺酸酯在催化量的钯和膦配体的存在下与胺或酰胺发生取代反应。
Various aryl triflates, bearing ketone or aldehyde groups, were evaluated for palladium-mediated introduction of an amino group at the triflate position in the presence of various phosphine ligands.
研究了烷基苯基硅铜酸盐与2-环烯酮的1，4-加成反应的立体选择性，并合成了一系列新的2-取代-3-硅基环烷酮。
The stereoselectivity of 1,4-addition of dialkylphenylsilyl cuprates to 2-cycloenones was investigated and meantime a series of new 2-substituted-3-silylcycloalkanones were synthesized.
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.
将七号位碳上的溴基取代成各种苯胺类衍生 物，再与4-甲氧基-磺基氯苯反应得到6-氮基吲哚-1-磺胺。
The 7-bromo group was replaced with various aniline, and then treated with 4- methoxybenzenesulfonyl chloride to afford the 6-azaindole-1-sulfonamides.
方法：以3-三氟甲基- 4-氰基苯胺和2- 甲基丙烯酰氯为起始原料经过酰化、 环氧化、取代和氧化四步反应合成比卡鲁胺。
Methods:Bicalutamide was prepared from 4-cyano-3-(trifluoromethyl) aniline and 2-methylacryloyl chloride by four steps: acylation, cyclization, substitution, and oxidization.
最后研究了4位芳香基取代1H-2，3-苯并恶嗪结构化合物的重排反应。
The rearrangement of 4-aryl 1H-2,3-benzoxazine derivatives was investigated.
最后研究了4位芳香基取代1H-2，3-苯并恶嗪结构化合物的重排反应。
The rearrangement of 4-aryl 1H-2,3-benzoxazine derivatives was investigated.
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