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The activities of palladium catalysed cross coupling reactions of substituted bromobenzenes were studied. 分析了温度、化剂、同取代基团对取代溴苯发生钯催化偶联反应活性的影响。
Six liquid crystals intermediates were synthesized by palladium catalysed cross coupling reactions with six substituted bromobenzenes and2 methyl3 butyne2 ol. 以4氟溴苯、,4二氟溴苯、,4,5三氟溴苯、碘溴苯、甲氧基溴苯、丙基溴苯为原料,分别与2甲基3丁炔2醇发生钯催化偶联反应,合成了6个苯基炔醇液晶用中间体。
In the crossing coupling reactions, the yield is at similar level due to unobvious electron effect resulted from the existence of ketones. 苯环上取代基的种类及位置对反应也有影响。在交叉偶联中，由于有酮存在，因此电子效应不明显，产率差不多。谢谢大家！
Keywords Supported palladium catalyst;Functional polysiloxane;Arsine palladium（0） complex;Cross coupling reaction; 负载型钯催化剂;功能聚硅氧烷;胂钯（0）配合物;交叉偶联反应;
Keywords Polymeric palladium catalyst;Sulfur phosphine mixed bidentate palladium（0） complex;Cross coupling reaction;Catalytic property; 聚合物钯催化剂;硫-膦混合双齿钯（0）配合物;交叉偶联反应;催化性能;
cross coupling reaction 交叉偶联反应
The cellulose oxyphosphine palladium complex catalyst was prepared and the catalytic activity of catalyst in the cross - coupling reaction of tributyltin hydride with acid chlorides was investigated. 制备了纤维素氧瞵-钯配合物催化剂,详细考察了催化剂对三(正)丁基锡氢化物和酰卤化合物偶联反应的催化作用。
No cross coupling between inductors due to low magnetic shield and high reliability. 漏磁小,不产生耦合,可靠性高。
For having missile of two sets of the same side directions autopilot,there is cross coupling between two control channels. 对于具有两套相同侧向自动驾驶仪的导弹,两个控制通道之间存在交叉耦合。
The coupling reaction between the difficult sequence Fmoc-Arg(Pbf)-OH and H-Pro-Trt resin was investigated. 着重研究了Fmoc-Arg(Pbf)-OH与H-Pro-Trt树脂的缩合反应。
The macrokinetics of CO gas coupling reaction on Pd catalyst was studied in a fixed-bed reactor. 采用固定床积分反应器;研究了自制的负载型钯系催化剂上CO气相催化偶联主、副反应的宏观动力学模型.
In addition, boric acid and halogenated hydrocarbons aryl the coupling reaction is a C-C bond important ways. 此外，芳基硼酸与卤代烃的偶合反应是形成C-C键的重要途径。
Stepped Impedance Resonators(SIR) taken as basic resonator unit of coaxial filters,a kind of generalized Chebyshev coaxial-cavity filter through cross coupling is designed. 利用阶跃阻抗谐振器SIR作为同轴腔滤波器的基本谐振单元,设计了一个利用交叉耦合来实现广义切比雪夫函数的同轴腔体滤波器。
Synthesize saframine O using o-toluidine as primer reactant by diazotization, coupling reaction, reduction reaction, and oxidation. 研究了以邻甲基苯胺为起始原料,经重氮化、偶合、还原、氧化反应合成藏花红的方法。
The conditions of silver sulphide dissolving in sodium cyanide have been discussed by the use of thermodynamic principle and coupling reaction. 应用热力学原理和偶合反应的观点对硫化银溶于氰化钠的条件进行了讨论.
Effects of main reaction conditions such as reaction time to the coupling reaction and the yield of squalene were studied primarily. 通过自制高效偶联试剂三三苯基膦氯化亚钴和自制金合欢基溴的还原偶联反应,成功地合成了角鲨烯。
How in the heck did you do that? 你究竟是怎么做的？
In the mathematical model of PWM rectifier in d-q synchronous reference frame, there is cross coupling between active and reactive components of the line current, which is difficult to control. PWM整流器在d-q旋转坐标系的数学模型中,有功电流与无功电流之间存在耦合,给控制带来困难。
The synthesis methods of hexamethyldisilane, such as reductive coupling reaction, Grignard reagent alkylation, electrochemical reduction et al, were recounted in details. 综述了近年来国外关于六甲基二硅烷的合成工艺(还原耦合法、格氏试剂法、电解还原法等);
On the basis of analysis on error model of ultra precision CNC machine tool, the variant gain cross coupling control algorithm is introduced into the servo control of ultra precision CNC machine tool. 文章在分析超精密数控机床误差模型的基础上,将变增益交叉耦合控制算法引入超精密数控机床的伺服控制。