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   转移加氢 的翻译结果: 查询用时:0.527秒
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转移加氢
相关语句
  transfer hydrogenation
     Preparation of 3,5-Dioxocyclohexanecarboxylic Acid from 3,5-Dihydroxybenzoic Acid by Transfer Hydrogenation
     3,5-二羟基苯甲酸转移加氢制备-3,5-二氧代环己烷羧酸
短句来源
     3,5-Dioxocyclohexanecarboxylic acid was prepared from 3,5-dihydroxybenzoic acid through transfer hydrogenation with Pd/C 〔w(Pd)=5%〕 as catalyst.
     以3,5 二羟基苯甲酸为原料,采用Pd/C〔w(Pd)=5%〕催化剂,通过转移加氢法合成了3,5 二氧代环己烷羧酸。
短句来源
     Macrokinetics of Transfer Hydrogenation of 3,5-dihydroxybenzoic Acid
     3,5-二羟基苯甲酸转移加氢动力学
短句来源
     Study on Catalytic Transfer Hydrogenation for Synthesis of 3,5-Dihydroxybenzoic Acid
     催化转移加氢合成3,5-二氧代环己烷羧酸的研究
短句来源
     PREPARATION OF 1,3-CYCLOHEXANEDIONE FROM RESORCINOL BY TRANSFER HYDROGENATION
     间苯二酚转移加氢制备1,3-环己二酮
短句来源
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  “转移加氢”译为未确定词的双语例句
     Results show that Pd-CS-SiO_2 catalyst has better chiral catalytic activity to acetophenone and enantioselectivity to(R)-1-phenylethanol.
     结果表明:Pd-CS-S iO2对苯乙酮不对称转移加氢反应具有较好的催化加氢性能和对R-1-苯乙醇的对映选择性;
短句来源
     It was found that Pd-Co/active carbon catalyst was the optimal catalyst, and Pd-Co/γ-Al2O3 was also good, but silica and kieselguhr were not proper carriers for the object reaction, because of their stronger surface acidity, which could result in the formation of polymer, jammed the micro pores of catalyst, and then resulted in its deactivation.
     研究结果表明,Pd-Co/活性炭催化剂是目标转移加氢反应的最适宜催化剂,Pd-Co/γ-Al203效果也较好,而硅胶和硅藻土由于表面酸性较强,容易造成生成聚合物而堵塞催化剂微孔、使催化剂迅速失活;
短句来源
     In this subject, the asymmetric hydrogenation reduction was conducted in water with noble metal while acetophenone being raw material and sodium formate being catalyst.
     本课题研究以苯乙酮为原料,以甲酸钠为还原剂,在有贵金属催化剂存在的条件下进行的水中不对称转移加氢还原的化学反应过程。
短句来源
     The results of the experiments indicate that it is viable that the asymmetric hydrogenation reduction is conducted in water when using sodium formate as reducing agent.
     实验结果证明利用甲酸钠在水中进行苯乙酮的不对称转移加氢还原工艺是可行的。
短句来源
     It is widely adopted in both homogeneous organic synthesis, especially in asymmetric synthesis, and heterogeneous hydrogenation.
     催化转移加氢法在均相有机合成中的应用十分广泛,尤其在不对称合成中应用更为广泛。
短句来源
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  相似匹配句对
     Macrokinetics of Transfer Hydrogenation of 3,5-dihydroxybenzoic Acid
     3,5-二羟基苯甲酸转移加氢动力学
短句来源
     Catalytic transfer hydrogenation and its application in organic synthesis
     催化转移加氢及其在有机合成中的应用
短句来源
     Transferred Epithet
     转移修饰语
短句来源
     The major just involved superficial muscular layer and no metastasis.
     皆无转移
短句来源
     Hydrogenation of Polymer Containing Polydiolefin Units
     不饱和聚合物的加氢
短句来源
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  transfer hydrogenation
Asymmetric transfer hydrogenation of prochiral ketone catalyzed over Fe-CS/SBA-15 catalyst
      
The heterogeneous catalytic transfer hydrogenation of styrenebutadiene rubber (SBR) by the use of limonene as hydrogen source and as solvent in the presence of Pd/C as catalyst has been studied.
      
High temperature syntheses using transfer hydrogenation reagents such as dihydroanthracene provide mainly two stable isomers of C60H36 that have been characterized spectroscopically.
      
Transfer hydrogenation and transfer hydrogenolysis.
      
Transfer hydrogenation and transfer hydrogenolysis: XII.
      
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3,5-Dioxocyclohexanecarboxylic acid was prepared from 3,5-dihydroxybenzoic acid through transfer hydrogenation with Pd/C 〔w(Pd)=5%〕 as catalyst.The catalyst was prepared through impregnation method and reduced by pure hydrogen.Using water as solvent and sodium formate as hydrogen source,the transfer hydrogenation reaction was carried out for 2 h to produce 3,5-dioxocyclohexanecarboxylic acid(Ⅰ) in 95% yield as monitored by HPLC.Pure Ⅰ was separated from the crude product with column chromatography and was identified...

3,5-Dioxocyclohexanecarboxylic acid was prepared from 3,5-dihydroxybenzoic acid through transfer hydrogenation with Pd/C 〔w(Pd)=5%〕 as catalyst.The catalyst was prepared through impregnation method and reduced by pure hydrogen.Using water as solvent and sodium formate as hydrogen source,the transfer hydrogenation reaction was carried out for 2 h to produce 3,5-dioxocyclohexanecarboxylic acid(Ⅰ) in 95% yield as monitored by HPLC.Pure Ⅰ was separated from the crude product with column chromatography and was identified by ~1HNMR and elementary analysis.The catalyst was characterized by XRD and BET techniques.Palladium is considered as the active substance of the catalyst,and the main reason of catalyst deactivation arises from the loss of palladium.

以3,5 二羟基苯甲酸为原料,采用Pd/C〔w(Pd)=5%〕催化剂,通过转移加氢法合成了3,5 二氧代环己烷羧酸。考察了适宜的催化剂制备及反应条件:浸渍制备的PdCl2/C经氢气还原,以甲酸钠为氢供体,水作溶剂,在90℃下反应2h,经HPLC分析得3,5 二氧代环己烷羧酸的收率为95%。得到的3,5 二氧代环己烷羧酸粗产物经柱层析分离得到纯品,并以1HNMR和元素分析法进行确证。催化剂经过XRD表征,确认了活性组分是原子态的Pd。并对催化剂失活原因做了初步分析。

Catalytic transfer hydrogenation is a method widely used in organic synthesis, using other hydrogen- containing multi-atoms substance as the hydrogen sources instead of hydrogen. This method features high safety, low reaction temperature, low requirement on equipment and higher selectivity. It is widely adopted in both homogeneous organic synthesis, especially in asymmetric synthesis, and heterogeneous hydrogenation. Latest advances in catalytic transfer hydrogenation were reviewed.

催化转移加氢法是有机合成中常用的一种加氢方法,由于使用的氢源不是氢气,而是其他一些含有氢的多原子化学物质,使得其加氢过程与用氢气的加氢过程相比,具有安全性高、反应温度低、设备要求低和选择性高等优点。催化转移加氢法在均相有机合成中的应用十分广泛,尤其在不对称合成中应用更为广泛。此外,在多相催化加氢中也有十分广泛的用途,并对催化转移加氢法的特点及在有机合成中的主要用途进行了评述。

The natural biopolymer of chitosan was supported on the surface of silicon dioxide, and then palladium was coordinated on it, to prepare the palladium-chitosan-silica complex (Pd-CS-SiO_2)chiral heterogeneous catalyst. The asymmetric transfer hydrogenation of acetophenone to R(S)-1-phenyl ethanol in atmosphere with 2-propanol as H-donor and solvent was studied as a model reaction. The effects of the Pd loading, reaction temperature, reaction time, and promoter of base on the performance of the catalyst...

The natural biopolymer of chitosan was supported on the surface of silicon dioxide, and then palladium was coordinated on it, to prepare the palladium-chitosan-silica complex (Pd-CS-SiO_2)chiral heterogeneous catalyst. The asymmetric transfer hydrogenation of acetophenone to R(S)-1-phenyl ethanol in atmosphere with 2-propanol as H-donor and solvent was studied as a model reaction. The effects of the Pd loading, reaction temperature, reaction time, and promoter of base on the performance of the catalyst were investigated. The results indicate that the Pd-CS-SiO_2 catalyst has a good catalytic activity and selectivity to the product for the asymmetric hydrogen transfer reduction of acetophenone. The addition of NaOH can increase the reaction rate and conversion of acetophenone significantly. The conversion of acetophenone increases with an increase of the Pd loading, but the enantiomeric excesses of 1-phenyl ethanol is higher at lower Pd loading. After reaction at 80 ℃ for 24 h, the conversion of acetophenone is 100% with 98% selectivity to 1-phenyl ethanol. At 30 ℃, the enantiomeric excess of R-1-phenyl ethanol reaches to 13.7%.

将天然手性高分子聚合物壳聚糖(CS)负载到SiO2上制得CS-SiO2载体,通过配位反应将Pd链接到该载体上,制得多相Pd-CS-SiO2手性加氢催化剂.以苯乙酮不对称氢转移加氢为模型反应,在空气氛围中研究了Pd-CS-SiO2的催化反应性能,考察了Pd的负载量、碱助剂、反应温度、反应时间等对反应转化率、选择性和对映选择性等的影响.结果表明,Pd-CS-SiO2催化剂具有较好的催化活性和选择性.使用强碱NaOH为助催化剂时,可提高氢转移加氢反应的速率和转化率;高的Pd负载量有利于苯乙酮转化率的提高,降低Pd的负载量有利于提高产物的对映选择性;提高反应温度有利于提高催化剂的反应活性,降低反应温度有利于提高产物的对映选择性.在30℃反应24h,产物R-1-苯乙醇的对映体过量值可达13.7%.

 
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