查询词典 aryl

The results show that the catalyst could catalyze the Heck reaction of substituted aryl halide with crylic acid, the yields were above 80%.

结果显示，CL-HA-Pd/Ni具有较快的反应速率和较高催化活性，可成功催化取代芳基卤与丙烯酸的Heck反应，产率在80%以上。

Extent of etherbond cleavage becomes more and more intensive with higher alkaline concentration, higher reaction temperature, longer reaction time, stronger activity of nucleophilic reagent, and these substituted aryl ethers will become more and more unstable.

碱浓度越高，反应温度越高，反应时间越长，亲核试剂的活性越强，醚键断裂的程度越大，这类化合物就越不稳定。

Besides, n-butyl and sec-butyl tosylate that are difficult for oxidative addition can react with phenylmagnesium bromide to form corresponding cross-coupling products. Primary alkyl halide which contains β-hydrogen and is relatively hard to undergo the reaction , n-butyl chloride for instance, can react with aryl Grignard reagents in the presence of NiB alloy as well.

此外，难以进行氧化加成的对甲苯磺酸正丁酯和对甲苯磺酸仲丁酯可以与苯基溴化镁作用生成相应的交叉偶联产物；反应相对困难的含β-H的伯卤烷，如：正氯丁烷也可以在NiB催化下与芳基格氏试剂发生偶联。

Such as,(1) Active Zincdust catalyzed the esterification reactions between benzoyl chloride and phenol or alcohol,which needed not solvent, warming and could fulfilled in a very short period (1-2min), andthe handling of the reaction mixtures was very simple. We believe it's the simplest and mosteconomic method for the synthesis of many aryl esters.

包括：(1)活性锌粉催化的酯化反应，在室温下即可反应，毋需溶剂，毋需加热，反应迅速(通常1—2分钟即可反应完全)，处理非常简便，相信目前是合成许多芳香酯最简便的方法，是一种值得加以推广的合成芳香酯的好方法。

Synthesis and structural characterization of novel cycioplatinated complexes with 2-aryl imidazolines 2-arylimidazoline ligands 2a-2d were synthesized from benzoyl chloride or p-methoxybenzoyl chloride with aminoethanol or valinol and 2e was synthesized from 2-phenylimidazoline.

新型2-芳基咪唑啉环铂化合物的合成与结构表征以苯甲酰氯或4-甲氧基苯甲酰氯和氨基醇(2-氨基乙醇或外消旋的缬氨基醇)为原料，合成了四种2-芳基咪唑啉配体2a-2d，以2-苯基咪唑啉为原料合成了配体2e，其中2d为新化合物。

A new convenient synthesis of a series of 1-aryl-2-propanones using aromatic amine s as precursors, via diazo reaction and improved Meerwein arylation reaction under mild conditions, was achieved.

以芳香胺为原料，经重氮化和改进的Meerwein芳基取代反应，合成了一系列的1-芳基-2-丙酮，其中1-(3，5-二三氟甲基苯基)-2-丙酮是一个新化合物。

For the α-arylation of ethyl acetoacetate, the product was α-aryl ethyl acetoacetates, rather than ethyl α-arylacetates which are the major products in other catalytic systems.

较为惰性的氯代芳烃在Pd2/L1的催化下，也能够跟1，3-二羰基化合物发生α-芳基化反应。

Furthermore, during the above synthetic studies, we also found sodium amalgam was a useful agent for reducing azide to amine, which was applicable for various alkyl and aryl azides bearing different functional groups.

另外，我们还对实验中意外发现的钠汞齐还原叠氮的反应进行了研究，考察了考察了带有不同官能团的叠氮化合物在此体系下的还原反应，取得了较好的结果，发展了一种新的还原叠氮的方法。

Aryl azides are by far the most frequently used photoaffinity probes because they can be easily synthesized, as well as being chemically stable in the dark and highly reactive upon photoirradiation.

与普通的芳基叠氮基团相比，全氟取代的芳基叠氮基团具有更高的光标记效率；而香豆素的叠氮衍生物则同时具有荧光标记能力和光亲合标记能力，具有更广泛的应用潜力。

The Aphos-Pd_2 system was proved very efficient for the coupling of alkyl boranes and the results are collected in Chapter 4.At the temperature of 50℃,a variety of aryl chlorides successfully coupled with alkyl boranes as well.

该类型配体对烷基硼试剂与溴代芳烃和烯烃的Suzuki偶联反应有着很好的效果，并且被成功地用于一系列氯代芳烃的反应，但反应温度为50℃。

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。