甲酰化

Three chiral phosphorus ligands were prepared using anisole as the startingat material.Their applications in the asymmetric hydroformylation and asymmetric conjug ed addition of diethylzinc to enones were investigated.

以苯甲醚为原料，合成了三种新的手性含磷配体，考察了三种配体在不对称氢甲酰化反应和ZnEt2对环己烯酮的不对称共轭加成反应中的应用。

Recent development in hydroformylation of ethene to propanal by catalytic synthesis is introduced in this paper.

目前世界上工业化生产丙醛多采用乙烯氢甲酰化反应催化合成，即用乙烯、CO和H2 在催化剂作用下合成丙醛。

Using cobalt chloride and ferromanganese as precursor of cobalt-based catalyst, the performance of the catalyst for hydroformylation of cyclohexene was studied.

以氯化钴和锰铁合金粉为钴基催化体系的前驱体，研究了该催化剂体系对环己烯氢甲酰化反应制备环己烷基甲醛的催化性能；并考察了溶剂、温度、压力等反应条件的影响。

It was found that the introduction of Cr4 moiety did not remodel the mechanism of hydroformylation of simple alkenes.

计算结果表明Cr4片段的引入并没有改变简单烯烃氢甲酰化反应的机理。

With the occurrence of H2/Pd-C and ethyl formic ester,the reduction of the nitro group and the formylation of the amino group could be finished in one step.

但是在甲酸乙酯存在下，用H2/Pd-C对Ⅶ的硝基进行还原，得到的Ⅷ中的氨基可当即被甲酰化，使由Ⅶ到Ⅳ的两步反应一步完成。

The influence of various parameters,such as the molar ratio of rhodium to phosphine,the reaction temperature and pressure on the hydroformylation were investigated.

50年代中期[1 ] ，人们发现铑络合物比钴对氢甲酰化反应具有更高的活性，可以使反应在更温和的操作条件下进行。

It is shown from both the electronic and stereo structural analyses, that PDBP is a superior coordinate ligand as compared with TPP, which was employed in the rhodium/phosphonium catalyst for the hydroformylation reaction.

采用元素分析、红外、核磁等方法，对其结构进行了表征，并将PDBP用于丙烯氢甲酰化反应的催化剂配体。

The effects of reaction temperature, phase transfer agent and the concentration of rhodium catalyst were examined.

研究了采用水溶性铑膦络合催化体系对双环戊二烯的氢甲酰化反应，考查了反应温度、相转移剂CTAB、铑催化剂浓度等对反应的影响。

Experimental results show that the incorporation of appropriate amounts of Al~2O~3 into SO~4^2^-/ZrO~2, SO~4^2^-/TiO~2 and SO~4^2^-/Fe~2O~3 is helpful for stabilizing the sulfur species and increasing the effective acid sites on the catalyst surfaces, which can improve the strong acidity and catalytic activity in benzoylation.

实验表明，向SO~4^2^-/ZrO~2，SO~4^2^-/TiO~2和SO~4^2^-/Fe~2O~3中引入适量的Al~2O~3，有助于稳定样品表面的含硫物种，增加样品表面的有效酸位，提高样品的强酸性和对甲苯的苯甲酰化的反应活性。

Experimental results show that the incorporation appropriate amount of Al into SO〓〓/ZrO〓, SO〓〓/TiO〓 and SO〓〓/Fe〓O〓 is helpful to stabilize the sulfur species on catalyst surfaces and to improve the superacidity and catalytic activity for benzoylation of toluene with benzoyl chloride.

实验表明，向SO〓〓/ZrO〓、SO〓〓/TiO〓和SO〓〓/Fe〓O〓中引入适量的Al〓O〓，有助于稳定样品表面的硫物种，提高样品的超强酸性和对甲苯的苯甲酰化反应活性。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。