Then there was a woman's voice, rising shrilly above the barking. 接着,一个女人的尖厉声音盖过了犬吠声。
Progress in the Synthesis of Nitrogen-Containing Heterocycles by Intramolecular Cyclization of Alkynes 炔烃分子内环化反应合成含氮杂环化合物的研究进展
Progress in a variety of catalytic systems-catalyzed dimerizations of terminal alkynes to synthesize enynes is summarized. 综述了不同催化体系催化末端炔烃二聚反应合成共轭烯炔化合物的研究进展。
The first part of this thesis summarized the synthetical condition and the latest application of various alkynes. 本论文第一部分对各种炔烃的合成条件作了系统综述。并对二茂铁乙炔近年来的应用作了概述。
Studies on the Asymmetric Addition Reactions of Terminal Alkynes to Imines and Aldehydes 末端炔烃对亚胺和醛的不对称加成反应研究
This paper reviews the development in the application of catalysts to the selective hydrogenation of alkynes and dienes. 综述了在炔烃和二烯烃选择加氢制烯烃过程中的催化剂的应用研究进展。
Analysis of trace alkynes in mixed C_4 fractions by two-dimensional gas chromatography 二维气相色谱技术分析混合碳四馏分中微量炔烃
Gold ( I)-Catalyzed Intermolecular Alkylation Reaction of Indoles with Terminal Alkynes 金催化的吲哚与末端炔烃的分子间烷基化反应
Palladium Catalyzed Carbonylation of Alkynes and Alkenes 钯催化炔烃和烯烃羰基化反应研究
Palladium-Catalyzed Cyclotrimerization of Alkynes 钯催化的炔烃环三聚反应
Recent methods for the stereoselective reduction of alkynes to Z or E alkenes 炔烃立体选择性还原制备Z-或E-烯烃的近期方法
Palladium-Catalyzed Dimerization Reaction of Terminal Alkynes and Stille Cross-Coupling Reaction of Aryl Halides 钯催化的炔烃二聚反应和芳香卤代烃Stille偶联反应
Transition Metal Catalyzed Aromatization of Alkynes 过渡金属催化的炔烃芳构化反应
The relationship between the boiling points of alkynes and their molecular graph 炔烃的沸点和分子结构图
The chemical properties of alkenes and alkynes are induced to 3 kinds through analysis: reactions of functional group, reactions of hydrocarbon radical, special reactions of extremity alkynes. And the regularity and scientism of alkene and alkyne chemistries are enhanced. 经过分析将烯烃和炔烃的化学性质归纳成为3大类:官能团的反应,烃基的反应和端基炔的特殊反应,从而增强了烯烃和炔烃化学的规律性和科学性。
Palladium Perfluorinated Sulfonate Resin Catalyzed Reaction of Aryl Halides with Alkenes or Alkynes 全氟磺酸钯树脂催化的芳基卤与烯烃或炔烃的反应
Studies on the Coupling Reaction of Terminal Alkynes under Copper ( I) and Phase Transfer Condition 相转移条件下Cu(I)催化的末端炔的偶联反应研究
Due to its good solubility and strong nonlinear absorption properties in the visible region, the conjugated oligomers of platinum aromatic alkynes become one of the focus research areas in recent years. 铂芳香炔类共轭低聚物由于其良好的溶解性、在几乎整个可见光区都显示出很强的非线性吸收等特性而成为近年来人们研究的重点之一。
Then we made the extension reaction of alkynes, and got a very good result. 然后,我们又做了炔烃的扩展反应,均得到了很好的结果。
The first chapter mainly introduces the methods for the preparation of propargylic alcohols using terminal alkynes and carbonyl compounds as starting materials. 第一章主要是对炔丙基醇的合成方法做了简要的概述,炔丙醇通常是由末端炔烃对羰基化合物的加成反应合成。
In recent years, the heavy metal containing aromatic alkynes oligomers and polymers have attracted great interest of scientists due to their special photophysical and photochemical properties, such as the rigid structure of the carbon-carbon triple, high chemical stability and high thermal stability et al. 近年来,重金属芳香炔类低聚物以及高聚物由于其具有特殊的光物理和光化学性能而越来越受到人们的青睐,例如,碳-碳三键的刚性结构、高的化学稳定性和热稳定性等。
The reactions of alkynes or alkynyl silanes with sulfonyl chlorides in the presence of silver salts have mainly been exploited in this paper. And the corresponding reaction mechanisms have been proposed. 本文主要是对过渡金属银催化下炔烃及炔基硅烷与磺酰氯反应的研究,并提出了相应的反应机理。
The sequential reaction of the nitrogen ylides with alkenes, alkynes, or nucleophile have been resulted in versatile heterocyclic compounds. 此叶立德可以与烯烃、炔烃以及亲核试剂发生反应生成不同种类的含氮杂环化合物。
It mainly obtained by the addition reaction of alkynes and iodine. 它主要是由炔烃和碘的加成反应得到。
Its catalytic activity on cyclotrimerization of alkyl substituted alkynes was proven low. 该催化体系对烷基取代的末端炔表现出较低的活性。
Under the effect of high power and actuator, it can form microwave discharge, and make methane to C2 alkynes in microwave chemistry reactor made of rectangular groove guide reactor under atmospheric. 在高功率和激励器的作用下,矩形槽波导谐振腔微波化学反应器内的甲烷气体在常压下就可以产生微波放电,使甲烷转化成C2炔。
The intermolecular cyclotrimerization reaction was easy to handle and carried out under mild conditions. Furthermore, nickel catalyzed intermolecular cyclotrimerization reaction of alkynes in the presence of nitrogen ligands and zinc iodide was studied and a newfashioned nickel catalytic system was exploited. 该催化体系用于环三聚反应具有操作简单、条件温和等优点。我们研究了氮配体和ZnI2参与的镍催化的单炔的环三聚反应,并开发了一类新型的镍催化体系。
The efficient method is compatible with several functional groups. ( 4) Recent advance in transition-metal-catalyzed annulation of alkynes for the synthesis of naphthalene derivatives was summarized. 该方法具有高效、良好的官能团兼容性;(4)综述了近年来过渡金属催化炔烃环化反应合成萘衍生物的研究进展;然后在介绍了锌盐催化下萘的衍生物的合成。
In this protocol, various of amines and alkynes are all compatibility to this novel addition/ oxidative cyclization reaction. Up to now, reports about the synthesis of pyrrole derivatives through an oxidative process are rather rare, although there are many strategies for their synthesis. 到目前为止,由炔酸酯和胺类化合物反应,通过一个氧化过程来合成吡咯衍生物的报道不多。