查询词典 substitution method

Compound 5 is synthesized through Frieldel-Crafts reaction, Grignard reaction and substitution reaction from compound 1 which serves as starting materials.

以化合物1为起始原料通过付克反应、格氏反应和取代反应，得到最终产物化合物5。

In the scheme,the key reactions were Grignard reaction, dihydroxylation,S_N2 substitution of hydroxyl and epoxide under acidic conditions and etc.

合成过程中的关键反应为Grignard反应，双羟化反应，质子酸催化的羟基与环氧的S_N2亲核取代成环反应。

This is one substitution that I believe all of us, in design management, are guilty of.

这是我相信的一个代入法，我们所有在做设计管理的人，都很内疚。

The author and his colleagues have performed the experiment before the introduction of electro- philic aromatic substitution or enolate halogenation in lectures.

作者和他的团队在介绍亲电芳基取代或烯醇卤化的课程前已经进行了实验。

In general, the products obtained from these Pd-catalyzed reactions are complementary to those obtained via traditional methods, such as electrophilic aromatic substitution and benzylic halogenation.

一般来说，这些产品来自钯催化反应是相辅相成的所得，经传统方法苄、电等替代卤代芳香。

Reaction Chemistry of Aromatic Compounds - Electrophilic Aromatic Substitution: Halogenation, Nitration, Sulfonylation and Friedel-Crafts Alkylation and Acylation.

芳香化合物的化学反应--亲电芳香取代反应：卤化，硝基化，磺基化和Friedel-Crafts 烷基化和醯基化。

METHODS The target compound was synthesized from 3,4-dimethoxyphenylacetic acid via halogenation, acylation, cyclization, alkylation and iodine substitution reaction.

以3，4-二甲氧基苯乙酸为原料，经卤化、酰化、环合、烷基化、碘取代等反应制得目标化合物。

Methods:YCP was coupled to bovine serum albumin to construct three neoglycoprotein s which are different in their degrees of substitution(DSs;≈3,≈6,or ≈10 mol of BSA carrier/mol of YCP hapten,respectively),and their immunogenicities were evaluated in mice following subcutaneous immunization,respectively.

将YCP与牛血清白蛋白共价偶联，获得取代度分别约为3、6和10的3种拟糖蛋白，经皮下分别接种ICR小鼠，测定免疫血清中多糖YCP的特异性抗体IgM和总IgG水平，以及半抗原和载体蛋白的特异性IgG亚型。

With American head lettuce as tested material, the rectangular hydroponic mode with gas-charged static nutrient solution was adopted, 6 different formula treatments including NO3(superscript -):NH4(superscript +)=80:20, 70:30, 60:40, 50:50; NO3(superscript -) replaced by CO (NH2) 2 as well as CK were set up and each formula was prepared by using groundwater directly to study the effects of different substitution amounts of nitrate nitrogen on growth status, root activity and chlorophyll content of lettuce.

方法］以美国结球生菜为试材，采用充气式静止营养液矩形水培方式，设定NO3：NH4=80：20，70：30，60：40，50：50；CO(NH2)2代替NO3以及对照共计6种不同的配方处理，各配方直接利用地下水进行配制，研究硝态氮不同替代量对生菜生长状况、根系活力和叶绿素含量的影响。

Fu strain has an Asn to Tyr substitution at position 481 in the hemagglutinin glycoprotein.

其中Fu毒株的血凝素蛋白第481位由Asn转变为Tyr。

The second is to cut a mere 100 calories from your diet , which is the equivalent of a tablespoon of butter.

第二个就是从你的饮食中减少一百卡路里，只是相当于一大汤匙的黄油。

This is where the Rorschach test comes in.

现在，罗氏测试就出现了。