取代

The monoesters of furoin were synthesized by esterification of corresponding the acyl chloride with the furoin.

糠偶姻单酯在醋酸铵和醋酸作用下合成了新化合物2-取代－4，5-双恶唑。

By simulating the EPR parameter D and the optical spectra, the distorted angles of two inequivalent sites which formed by Cr3+ replacing M3+ are determined and the obvious differences of the distorted angles calculated by using two spin orbit coupling parameter model and single spin orbit coupling parameter model are found.

通过模拟光谱和EPR谱确定了Cr3+取代 M3+形成的两种占位结构的畸变角，发现用双自旋轨道耦合系数模型与单自旋轨道耦合系数模型计算出的畸变角存在较大的差异。

Starting with commercial available tosylmethyl isocyanide and but-2-enoic methyl ester, pyrrolo[2,1-f][1,2,4]triazine derivatives was prepared by twelve-steps process in total yiled of 5.0%~8% via pyrrole and pyrrolo [2,1-f] [1,2,4] triazine ring formation, substitution and amination reactions etc.

本文以简单的对甲基苯磺酰甲基乙腈和反-2-丁烯酸为原料，经过形成吡咯，吡咯并[2，1-f][1，2，4] 三嗪环，取代，酰胺化等等12步反应，合成了结构新颖的吡咯并[2，1-f][1，2，4] 三嗪衍生物，总收率达5%～8%。

Thirdly, The preparation of 3-aryl-5-substituted-ethenyl isoxazoles and l-isoxazolyl-2-isoxazolinyl substituted-ethenes was developed through 1, 3-dipolar cycloaddition of nitrile oxides,α-alkylation reaction and another 1, 3-dipolar cycloaddition of nitrile oxides based on polystyrene-supported propargyl selenide.

三、从聚苯乙烯负载的炔丙基硒醚出发，经过腈氧化物的1，3-偶极环加成反应、α-烷基化反应和腈氧化物的1，3-偶极环加成反应固相分别合成了3-芳基5-取代--乙烯基异噁唑和1—异噁唑—2—异噁唑啉取代的-乙烯。

In order to search for the new pyrazolyl-heterocycles lead compounds, eight pyrazolyl- were synthesized from 3-ethyl-1-methyl- 4-substituted-5-pyrazolecarboxylic acid chloride and nitrogen heterocyclic rings such as 3-methyl-5-pyrazolone, 1H-3-ethyl-5-pyrazole ester, etc.

为了寻求新的含吡唑双杂环先导化合物，用 4 取代 1 甲基 3 乙基 5 吡唑甲酰氯与 3 甲基 5 吡唑酮、3 乙基 5 吡唑甲酸乙酯等含氮杂环反应得到了 8个新的含吡唑环的双杂环类化合物。

Reduction of N-substituted-4-nitrophthalimides(1)to the corresponding amines(2)was performed in hydrochloric acid at 40 ℃ using stannous chloride as reduction agent, yielding produc...

氮气保护条件下，2与乙醇在固体光气作用下生成(2 取代 1，3 二酮 2，3 二氢 1H 异吲哚 5 )氨基甲酸乙酯(3)，3的产率为67%～92%。各化合物的结构均经1H NMR、IR、元素分析和FAB MS证实。

Influence of properties of substituents on different reaction steps of various tetrazole derivatives has been approached as well.

研究了取代基性质对不同异构体和不同热解步骤的影响，发现四唑衍生物与相应的叠氮化合物之间存在平衡，吸电子取代基有利于平衡向生成叠氮化合物方向移动，取代基通过场效应和共轭效应影响5-取代-1H四唑的开环反应。

After the new binary form was created, we will attach the character 't' to the two compared terms and a '*' to the uncompared terms, but if the terms already attached with 't' character, it shoulddn't replaced with '*' if they can't be compared with the other terms.

在新的二进制形式的创建，我们会重视字符'吨'两个比较范围和'*'的uncompared条款，但'如果条件已附加吨的个性，它不应该为'取代*'，如果他们不能相比的其他条款。

The upshot is that if, in Jackson's derivation, we replace, which we have argued is not a microphysical claim, with the weaker claim that H2O is a waterish stuff around here, then there will be no way to derive the conclusion from the premisses.

这个结果是，从Jackson来的，我们用更弱的主张&H2O是这里的某些『a』水性材料&取代（——我们认为不是微观物理学主张），那么就没有办法从前设得到结论了。

The fifth part sublimes the theories to the contemporary society. For example, using them to widen the critical view of the capitalism and set up the harmonious socialism ecosystem views; Replacing "the Economic Person" with "the Ecosystem Person", and which can help to set up a new ecological theories; Using laws to standardize the application of science and technology, to develop what is useful and discard what is not; Using the scientific developing view, which is the new modern fruit of Marx's theories about the relation between human and nature , to promote the development of the economy and achieve fully harmony of the human and the nature.

第五部分与时俱进，概括了马克思&人与自然&理论在当代的升华，如用马克思&人与自然&理论去拓宽资本主义制度的批判视域，构建和谐的社会主义生态观；用&生态人&取代&经济人&的人性假设，构建新的生态经济学理论；用法制去规范科技的运用，以扬其善去其恶；用马克思&人与自然&理论现代化的新成果——科学发展观去指导经济的发展，以达到人与自然的充分和谐。

Hanna: That's over now, isn't it?

都结束了，对吗

You must be ill. You look so pale.

你一定是病了，你的脸色苍白。