查询词典 aryl

Suzuki cross-coupling of aryl bromides with arylboronic acid is one of effective methods to form biphenyl derivatives in organic synthesis.

在有机合成中，Suzuki交叉偶联反应是制备联苯类化合物最重要的方法之一，本论文设计并合成了二个P⌒O系列、一个P⌒N系列双齿配位的钯配合物。

Based on the experimental results, it could be consequentially concluded that N-methoxycarbonylation of aromatic amines was followed by the exclusive N-methylation of methyl N-aryl carbamates during the reaction process.

苯环上有钝化基团的一级芳胺反应活性比较好，获得N-甲基-N-芳基氨基甲酸甲酯的产率较高，反应时间也较短；而苯环上活化基团的存在，则会降低一级芳胺的反应活性。

Enynes with an aryl ring at the alkyne give 2,3,9,9a-tetrahydro-1H-cyclopentanaphthalenes by a 5-exo-dig cyclization followed by a Friedel-Crafts-type ring expansion.

带有芳环的1，6-二烯体和炔作用，并通过5-exo-dig路径环化，再紧接着Friedel-Crafts扩环，可以得到2，3，9，9a-四羟基-1H-环戊二烯并萘。6-endo-dig途径的环化在一些例子中作为副反应被观察到，尽管，这在一些具体的反应中，是作为主反应出现的。

In the second section, we described CuI/L-proline-promoted cross-coupling reaction of aryl iodides with activated methylene c-ompounds.

本论文分为两部分，第一部分为手性胍离子液体的制备及性质表征；第二部分为CuI／L-脯氨酸催化的芳基碘苯和活泼亚甲基化合物交叉偶联反应的研究。

These catalysts were found to have good activity and reusability in the Heck vinylation of aryl iodides and acrylate, among which the ethylenediamine modified resin supported Pd(0) catalyst kept a high activity at the 17th run at 90℃.

结果表明，该类催化剂具有良好的催化活性和重复使用性能，其中用乙二胺功能化树脂负载的Pd(0)催化剂在90℃重复使用17次时能保持良好的催化活性。

Both electronic and steric effects were observed for the homo coupling of aryl iodides. Electro-withdrawing and ortho substituents gave desired products in low yields.

在取代碘苯的偶联反应中观察到电子效应和位阻效应的影响，吸电子基取代和邻位取代对反应不利。

The recent research progress of oxidation carbonylation of amines/β-amino alcohols, alkoxycarbonylation of epoxides, carbonylative Suzuki coupling, carbonylative Sonogashira, and double carbonylation of aryl iodides has been presented, focusing on the carbonylation reactions studied by us in the past few years, with 81 references.

综述了胺／氨基醇类化合物氧化羰化、环氧化合物氢酯基化、碘代芳烃的羰化Suzuki偶联、羰化Sonogashira以及双羰基化等重要羰基化反应的研究状况，特别是结合本课题组近年来在该领域中的工作，并对羰基化反应的发展及应用前景进行了展望。

Macrocycle with two aryl oxdiazolesThe structure of this type of macrocyclic compounds with two aryloxdiazoles attached to the nitrogen atom of amino acids is different fromthat of the above compounds.

三。含双噁二唑的大环：在这类分子中两个芳基噁二唑通过氨基酸的氮原子连接成环，而将手性中心和羧基端放于环外，这可提高分子的络合性能。

To synthesize aryl pyrimidines by taking benzene, methyl benzene ,acetic ether,1,2-dichloroethane as solvent,the yield and purity of the product are high by taking methyl benzene as solvent.

分别选用苯、甲苯、乙酸乙酯、二氯乙烷作为溶剂合成桂皮酰哌啶，结果表明甲苯作为溶剂时产品纯度高，收率高，可用于大规模生产。

In the first part, thirty one new compounds, ferrocenyl aroyl hydrazones,norbornenyl aroyl hydrazones and aryl norbornoyl hydrazones, and forty threecomplexes have been synthesized, and characterized by means of IR,〓,TGA, UV-Vis spectra and molar conductance.

第一部分：共合成了含二茂铁基的芳酰腙、降冰片烯基酰腙等三十一个未见报道的酰腙类化合物，用其中部分酰腙与过渡金属盐和稀土金属盐反应合成了四十余个配合物。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。