硝基化合物的还原羰基化反应

硝基化合物与CO之间进行的还原羰基化反应是有机催化的新研究领域。通过硝基化合物的还原羰基化反应可以合成许多重要的含氮有机化合物如异氰酸酯，氨基甲酸酯、脲、偶氮化合物和n-杂环化合物等。本文就还原羰基化反应，催化剂及催化作用机理的研究进展作一评述，其中也提及我们实验室的研究工作

Analytical Control of Asymmetric Transfer Hydrogenation of Acetophenone using Chiral Capillary Gas Chromatography

手性毛细管气相色谱跟踪苯乙酮不对称催化氢化反应过程许翩翩阮源萍高景星（厦门大学化学系固体表面物理化学国家重点实验室物理化学研究所厦门361005）在开发研究芳香酮氢化反应的新型手性催化剂时，通常采用苯乙酮不对称催化氢化生成苯乙醇的反应效率来评价手性氢...This paper deals with the process analysis of asymmetric transfer hydrogenation of acetophenone by using Chiral capillary gas chromatography.The solvents, acetophenone and phenylethanol enantiomers were wellseparated on a Chrompack CPcyclodextrinβ236M19 column with FID detector.The racemic phenylethanol was determined and the relative content of the enantiomer was 50.1∶49.9(n=6).The chromatographic separation enable accurate determination of e.e.value and conversion(%) of acetophenone.The absolute configuration of the major enantiomer of phenylethanol was determined from the elution order.This method may be suitable for research in process of asymmetric transfer hydrogenation of arometic ketones.国家自然科学基

A STUDY ON THE OXIDATIVE CARBONYLATION OF ANILINE

以Ｐｄ／Ｃ为催化剂，以ＮａＩ为助催剂，以无水乙醇为溶剂，进行了苯胺氧化羰基化反应。研究了苯胺氧化羰基化的最佳工艺条件，解释了碘化钠在本反应中所起的助催作用。在１７０℃，反应两小时后，Ｐｄ／Ｃ显示了高活性（９７.４９％）和高选择性（８５．２６％）。最后，提出了苯胺氧化羰基化反应的机理。The oxidative carbonylation of aniline to carbamate over Pd-based catalyst was studied by using NaI and absolute ethanol as the promoter and solvent, respectively. The optimum process conditions for this reaction were investigated. At 170 C, after 2 h of reaction, the Pd/C catalyst exhibited high activity (97.49%) and high selectivity (85.26%). The promoter role of NaI was discussed, and a mechanism for the title reaction was proposed

载体SiO_2表面修饰对钒基催化剂丙烷氧化脱氢催化性能的影响

用ＸＲＤ、Ｒａｍａｎ、ＦＴ－ＩＲ、５１Ｖ－ＮＭＲ、Ｐｙ－ＩＲ和ＴＰＲ－ＴＰＯ表征ＳｉＯ２或ＳｉＯ２上预负载ＭｇＯ后负载的钒氧化物催化剂体系．ＳｉＯ２上直接负载钒氧化物，在钒负载量约为５ｗｔ％Ｖ２Ｏ５时出现Ｖ２Ｏ５晶相，而预负载ＭｇＯ的在相同钒含量时则没有出现Ｖ２Ｏ５晶相，表明预负载ＭｇＯ促进了钒氧化物在载体表面的分散．预负载ＭｇＯ的催化剂的可还原性和其还原态活化气相氧的活性较低，有较好的丙烷氧化脱氢的丙烯选择性，同时又因有较强的表面酸性位，有利于对丙烷仲碳Ｃ－Ｈ键的活化，而能保持其较高的丙烷氧化脱氢活性．钒氧物种与载体形成Ｖ－Ｏ－Ｍｇ（Ｓｉ）桥键，该桥键氧可能是丙烷氧化脱氢的活性氧物

茶叶中茶多酚的吸附分离提取

研制了聚酰胺/硅胶负载型吸附剂并用于提取茶叶中的茶多酚。该吸附剂对茶多酚的吸附能力与硅胶的平均孔径和聚酰胺的负载量有关，硅胶平均孔径以12-13nM为宜；聚酰胺的担载量以10~20WT%效果最佳。该吸附剂对茶多酚的提取率约12%；制品纯度为85%─90%可直接用于食品加工工业

手性多齿胺膦钌配合物的设计合成和在芳香酮不对称氢化反应中的应用

简要介绍了多齿胺膦金属配合物的设计合成．这些多齿配合物显示了单齿胺或膦金属配合物所不具有的丰富结构类型和特殊催化性质．合成和表征了含有结构类似的双亚胺双膦钌配合物（Ｒ，Ｒ）－３和双胺双膦钌配合物（Ｒ，Ｒ）－４．配合物（Ｒ，Ｒ）－４可作为多种芳香酮不对称氢化的手性催化剂，其光学收率最高达９７％．讨论了钌配合物的催化作用机理

Production of Gasoline From Waste Plastics by Catalytic Cracking

介绍了由废旧塑料通过热裂解和催化裂解制备汽油的方法，着重介绍了由废旧塑料制得的重油经催化裂解获取汽油的反应装置、催化剂、反应条件、产物分析和可能的反应途径。Pyrolytic and catalystic cracking methods For production of gasoline From waste plastecs are introduced with emphasis on the reaction apparatus, catalysts, reaction conditions, ana lysis of products and possible reaction pathways in the production of gasoline by catalytic cracking of heavy oil obtained From waste plastics

Analytical Control of Asymmetric TransFer Hydrogenation of Aromatic Ketones Using Chiral Capillary Gas Chromatography

提出了一种跟踪监测芳香酮手性催化氢化反应过程的气相色谱分析新方法。它可以快速准确地测定反应过程芳香酮的转化率、产物芳香醇对映体的过量百分数(E.E.值)及其构型。该法用于一系列芳香酮不对称催化氢化反应催化剂的性能评价,对筛选催化剂和优化反应条件,取得了到良好的效果。This paper deals with the process analysis of asymmetric transFer hydrogenation of aromatic ketones by using chiral capillary gas chromatography.The solvents, arometic ketones and enantiomers of aromatic alcohols were well separated on a Chrompack CP—cyclodextrin—β—236—M19 column with FID detector.The racemic phenylethanol was determined and the relative content of the enantiomer was 50.1: 49.9 (n=6).The chromatographic separations enable accurate determination of conversion(%) of aromatic ketones and e.e.value of the major enantiomer of aromatic alcohols, whose absolute conFigurations were determined From the elution order.It is illustrated that chiral capillary gas chromatography is a rapid, simple and accurate method For the reaction samples.国家自然科学基金;福建省自然科学基

The Study of Reactive Conditions of Oxidative Carbonylation of Aniline

苯胺氧化羰基化采用Pd/C 为催化剂， 产物为苯氨基甲酸乙酯， 是均相催化反应多相化的典型例子- 通过对温度、反应时间、氧分压等的仔细摸索， 找到了反应的最佳条件， 并分析和弄清了反应副产物及其来源The oxidative carbonylation of aniline with Pd/C as catalyst can produce ethy1 N-phenyl carbamate, which is a typical example of homogeneous catalytic reaction We have found the optimum reactive condition after studying on temperature、reactive time、oxygen partial pressure et al We have analysed the byproducts and have affirmed their sourc