对甲基化反应机理进行了讨论。
同时有轻微的去甲基化反应发生。
用含苯基聚硅烷中的苯环进行氯甲基化反应；
The containing chlorine polysilanes were synthesized by chloromethylation reaction of polysilanes with Ph.
进一步研究了胶束催化氯甲基化反应的机理。
The mechanism of chloromethylation reaction and the mechanism of micellar catalysis were further investigated.
结果表明，乙醇是作为羧甲基化反应的合适介质。
Results are showed as follows. Ethanol is the best medium for the reaction of carboxyl methylation.
转移甲基化反应影响的合成，活化，代谢及各种生物分子。
Transmethylation reactions affect the synthesis, activation, and metabolism of various biological molecules.
通过室温下高硫煤的S甲基化反应，可使煤结构中的一种碳硫键选择性断裂。
We report an S-methylation reaction on high sulfur coal at ambient temperature that appears to selectively cleave one type of carbon-sulfur bond in the coal structure.
采用磺甲基化反应对聚丙烯酰胺进行了改性。探讨了反应条件对产物性能的影响。
The polyacrylamide was modified by sulfomethylation and the effects of reaction conditions on properties of modified product were investigated.
介绍了聚苯乙烯树脂间接氯甲基化的方法。对影响氯甲基化反应的一些条件、因素作了讨论。
The methods about indirect Chloromethylation of Polystyrene are discussed, and the conditions and factors affecting the reactions of chloro - methylation also discussed here.
首次分离、纯化了甲基化反应的重要副产物，经元素分析、氢谱、质谱确定为双甲基化产物。
A byproduct in the methylating reaction was separated, purified and determined to be of the dimethylated product for the first time.
通过对噻吩的氯甲基化反应的温度与原料配比的考察表明，焦化苯中的噻吩可完全转化为噻吩聚合物。
The investigation on thiophene to chloromethylation reaction temperature and feedstock blending proportion shows that thiophene in coking benzene can completely convert into thiophene polymer.
此外还有甲基化反应、氨基酸结合反应、脂肪酸结合反应、缩会反应等，在II相代谢中发挥着各种作用。
Other conjugation reactions include methylations, amino acid conjugations, fatty acid conjugations and condensation reactions which play different roles in phase II metabolism.
它可以代替剧毒的光气和硫酸二甲酯作为环境友好的有机合成中间体和起始物质，应用与羰基化和甲基化反应中。
It can be use as an environment-friendly intermediate and starting material for organic synthesis substituting the poisonous phosgene and dimethyl sulfate in carbonylation and methylation reaction.
以双氟美松为原料，经氧化、酯化、酰化、醇解和氟甲基化反应制得氟替卡松丙酸酯（1），总收率60。
Fluticason propionate(1) in overall yield of 60.1% was synthesized from Flumethasone by oxidation, esterification, acylation, alcoholysis and fluoromethylation.
在2 -甲基萘选择甲基化反应中，2,6 -二甲基萘相对于2,7 -二甲基萘的选择生成以及2,6 -二甲基萘选择性与2 -甲基萘转化率之间的矛盾是需要克服的两个主要困难。
In this reaction, selective formation of 2, 6-dmn other than 2, 7-dmn and the contradiction between 2, 6-dmn selectivity and 2-mn conversion are the two main difficulties.
这种GR的甲基化似乎使个体对压力更加了解或敏感，他们会在心理上和荷尔蒙分泌上反应更快。
This methylation of GR appears to make the individual more tuned in or sensitized to stress, so they will react to it quicker mentally and hormonally.
斯兹夫博士表示，这一差别意味着自杀组的基因过甲基化并非整体差异，而像是对一些特定情况的反应，比如说童年所遭受的虐待。
This suggests that the hypermethylation in the suicide group was not just a general difference, says Dr Szyf, but rather a response to something specific, such as abuse suffered in childhood.
与之相反，L -甲硫氨酸增加了甲基化水平，从而减弱了正常老鼠中糖皮质激素受体基因的表达，导致了恐惧、焦虑和对压力的强烈反应。
By contrast, L-methionine increased the level of methylation and thus reduced the expression of the gene in animals with loving mothers, and led to fear, anxiety and a heightened response to stress.
三聚氰胺、尿素与甲醛经羟甲基化、醚化反应，生成甲醚化六羟甲基三聚氰胺和甲醚化羟甲基脲复合树脂胶。
Melamine, urea and formaldehyde underwent hydroxymethylation and etherification to yield a composed resin glue of methyl-etherified hexahydroxy methylmelamine and methyl-etherified hydroxymethylurea.
以对甲酚为原料经溴化、水解、甲氧基化和甲基化4步反应合成药物中间体3，4，5-三甲氧基苯甲醛，总收率达53。
The 3,4,5 trimethoxybenzaldehyde is synthesized from p cresol in four steps of bromination, hydrolyzation, methoxylation, and methylation, with an overall yield of 53.
以蛋氨酸为原料经还原脱硫甲基化、酯化、氨解、酰胺化及分子内缩和成环4步反应合成得到了左乙拉西坦，总收率44.6%。
Levetiracetam was prepared from L-methionine via reduction-dethiomethylation, esterification, ammonolysis, amidation and intramolecular cyclocondensation reaction with 44.6% overall yield.
在有机合成中，芳环化合物的氯甲基化和将苄基卤氧化成芳醛或芳酮是一类极其重要的反应。
In organic synthesis, chloromethylation of aromatic compounds and oxidation of benzylic halides to aromatic aldehydes or aromatic ketones are extremely important reactions.
结果：反应主要控制在单甲基化阶段，且通过适当的后处理方法，可得产物含量较高的固体纯品。
METHODS Phase-transfer catalytic methylation and suitable method of aftertreatment were used. RESULTS The yield and content was both improved.
方法：用甲基化敏感的限制性核酸内切酶消化，结合聚合酶链反应（PCR）技术。
Methods: 20 cases of MDS patients were studied using methylation sensitive restriction enzyme digestion and polymerase chain reaction(PCR) technique.
以1- 苯基- 2-丙胺为原料，经N- 甲基化、拆分、N-炔基化、成盐共4步反应合成盐酸司来吉兰，总收率为42。
From 1-phenyl-2-propylamine, selegiline hydrochloride, an anti-Parksins drug, was synthesized via N-methylation, enantiomer separation, N-alkylation and salt formation with an overall yield of 42.2%.
本文用2-氯-5-氯甲基吡啶经氨基化，和N-氰基乙亚胺酸乙酯反应，最后甲基化得到吡虫清。
In this thesis, 2-chloro-5-chloromethyl pyridine is ammoniated, which followed by the reaction with N-cyano ethyl ethylimidoate, finally is methylated to gain the objective product.
报道了氨磺酸催化的活泼亚甲基化合物和醇的直接烷基化反应新方法。
An Efficient NH2SO3H-catalyzed direct alkylation of active methylene compounds with benzylic and allylic alcohols has been reported.
报道了氨磺酸催化的活泼亚甲基化合物和醇的直接烷基化反应新方法。
An Efficient NH2SO3H-catalyzed direct alkylation of active methylene compounds with benzylic and allylic alcohols has been reported.
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