衍生物

In the present paper, regiospecific aryl nitration and consequent derivation of meso-tetraarylporphyrins were studied.

本论文对meso-四芳基卟啉芳环的定位硝化反应及其衍生物的合成进行了研究。

Thiourea and its derivate have an important performance in the analyses of precious metals.Their application to photometric analysis,electrochemical methods,atomic absorption spectroscopy,separation and enrichment of precious metals have been concerned.The related research and development since 1980 have been reviewed.

马媛硫脲及其衍生物(R-NH-CS-NH-R′)以其独特的分子结构在贵金属分析中一直占有重要位置，它们在贵金属的光度分析、电化学分析、原子吸收光谱分析和分离富集等领域中的应用一直为人们所关注，本文重点评述1980年以来相关的研究与发展。

All these compounds were characterized by azeotrope and elemental analysis, as well as by spectral measurements.

对所制成的衍生物均采用了共沸混合物分析、元素分析和光谱测定等进行了表征。

Starting from 3-benzoyl-5-formyl-indolizine, 3-benzoyl-5-(2'2'-diacetylethenyl)-indolizines and analogs were obtained by the 〓mediated aldol condensation or Wittig reaction. These compounds,promoted by low-valent titanium, gave highly functionlizedcycl[3,2,2]azine derivatives. The coupling reaction proceeded betweenthe carbonyl group and the carbon-carbon double bond, a rare example inMcMurry reaction.

我们以3-苯甲酰基-5-甲酰基中氮茚为原料，通过三碘化钐促进的aldol反应和Wittig反应制备了3-羰基-5-羰基乙烯基中氮茚，随后经低价钛还原偶联，没有生成正常的分子内羰基-羰基偶联产物，而是得到反常的羰基与α，β-不饱羰基的双键偶联产物，较高收率地得到了含多官能团的CycI[3，2，2]azine衍生物。

Synthesis and research of photochromism based on side-polyimide containing azobenzene group.

手性偶氮苯衍生物的光致变色和全息存储特性研究。

This work mainly studies on the photochemical reaction of benzylideneaniline and azobenzene derivatives, we also studies on the pharmaceutical chemistry of the product from our new reaction.

本篇论文主要是在研究苯亚甲基苯胺与对位烃基偶氮苯衍生物的光化学反应，以及所得到之产物在药性上之应用。

We synthesized five azole compounds from two different hydrazole by different reaction conditions.

而肼及其衍生物则是合成唑类化合物的最基本的原料。

It is not hard to picture derivatives as a central battleground between banks and their regulators.

将金融衍生物描述为银行和清理者的战场是很自然的。

At least two separate inhibitory actions on 5-HT3A receptors could be identified for propofol, whereas the enhancing action seen for the two related smaller phenol derivatives could no longer be detected. 5-HT-dependent and 5-HT-independent interactions could be distinguished for all three drugs.

异丙酚被证实对5-HT3A 受体至少有两种相互独立的作用，而在两种相关的较小分子的酚类衍生物中所看到的增强作用则不能被检测到。5-HT 依赖和5-HT 非依赖两种相互作用因为这三种药物而著称。

A good part of the problem in the financial sector is being caused by a beastie called the credit default swap which is a derivative.

对于财政部门来说，所谓"信用违约互换"的衍生物正在产生一个积极的方面。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。