中间体

Ethyl 4-[(1-hydroxy-1-methyl)ethyl]-2-propyl-1H-imidazole-5-carboxylate,the key intermediate of Olmesartan ,was synthesized from butanoic acid and o-phenylenediamine via condensation under microwave-irradiation,oxidation,esterification and the Gringard reaction.

用正丁酸与邻苯二胺为原料，在微波照射下缩合成2-丙基苯并咪唑，再氧化开环制得2-丙基咪唑二羧酸，再经酯化、Gringard反应制得抗高血压药物奥美沙坦的关键中间体2-丙基-4-[(1-羟基-1-甲基)乙基]-1H-咪唑-5-羧酸乙酯，总收率32.2%。

The new synthetic technology of propandiol butyl ether and its comparison with the traditional production process are given in this article.

介绍了合成丙二醇丁醚的新工艺并和传统生产方法进行了比较，阐明了丙二醇丁醚作为溶剂和化学反应中间体的应用和发展前

In a static photocatalytic reactor,the gas-phase adsorption and photocatalytic degradation of benzene and butyraldehyde over the two photocatalysts were studied,and the intermediates and products were detected by gas chromatography.

利用溶胶-凝胶并水热处理法制备了TiO2光催化剂和TiO2/AC复合光催化剂，在静态光催化反应器中研究了苯和丁醛的气相吸附和光催化降解，利气相色谱分析确定了生成的中间体。

According to results of cantharidin structure-activity relationships, a series of cantharidin derivatives for the first time were designed, synthesized and characterized by IR, NMR and elemental analysis.

用IR、〓H NMR初步证实了斑蝥素衍生物和DCC生成稳定中间体是使含有芳香羧酸的斑蝥素衍生物与氨基葡萄糖及其衍生物不能进行反应的主要因素。

The reaction mechanism of ozone and singlet carbene has been studied by means of the Gaussian-3 method to optimize the geometries of reactions, transition states, intermediates and products.

为了研究单态卡宾与臭氧反应机理，本文采用密度泛函理论Gaussian-3方法(G3B3)优化了反应物、中间体、过渡态和产物的几何构型。

Cresotic acid is an important kind of dye and medical intermediate, which is mainly made from o-cresol by carboxylation.

中文摘要：邻甲基水杨酸是一种重要的染料和医药中间体，它主要是由邻甲酚经羧化反应而制得。

Catechol/hydroquinone is extremely important organic intermediates widely used pesticide, medicine, dyes, spices, additives and other fields.

邻/对苯二酚是极其重要的有机中间体，广泛用于农药、医药、染料、香料、助剂等领域。

Celanese has nearly 90 years of history as a manufacturer of intermediate and downstream chemical products.

塞拉尼斯是一家具有90年历史的化工公司，生产化工中间体及下游产品。

Following the standard of Fluka, Aldrich, we are doing our best to provide low price intermediate and leading chirality chemicals for you.

公司将依照Fluka，Aldrich的标准，为您提供优质的中间体及尖端手性化学品。

The side-chain liquid crystal polymacrylate was synthesized by free radical polymerization form the acrylate monomer which was generated from p-hydroxy benzoic acid, ethylene chlorohydrin and acrylic acid by etherification, esterification and chloration.

以对羟基苯甲酸、氯乙醇和丙烯酸为主要原料，经醚化、酯化和酰氯化反应合成了中间体和含液晶基元的丙烯酸酯单体，后者经自由基聚合合成了聚丙烯酸酯侧链液晶聚合物。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。