One-pot reductive amination of aldehydes with nitroarenes over an Au/Al<sub>2</sub>O<sub>3</sub> catalyst in a continuous flow reactor
作者:E. A. Artiukha、A. L. Nuzhdin、G. A. Bukhtiyarova、S. Yu. Zaytsev、P. E. Plyusnin、Yu. V. Shubin、V. I. Bukhtiyarov
DOI:10.1039/c5cy00964b
日期:——
Various secondary aromatic amines were synthesized by Au/Al2O3-catalyzed one-pot reductive amination of aldehydes with nitroarenes in a flow reactor.
通过流反应器中金/氧化铝催化的醛与硝基芳烃的一锅还原胺化反应,合成了各种二级芳香胺。
Reinvestigating Raney nickel mediated selective alkylation of amines with alcohols via hydrogen autotransfer methodology
作者:Astha Mehta、A. Thaker、V. Londhe、Santosh R. Nandan
DOI:10.1016/j.apcata.2014.04.009
日期:2014.5
efficient, cost-effective use of Raneynickel (R-Ni) a widely used industrial catalyst for N-alkylation using alcohols is highlighted here. The work describes the scope and capability of R-Ni in hydrogen autotransfer reactions enabling its widespread use in the Chemical and Pharmaceutical industry. R-Ni of W4, T4, and W7 grades were prepared and evaluated for alkylation of amines. The best activity and
One-Pot Synthesis of Secondary Amines from Nitroarenes and Aldehydes on Supported Copper Catalysts in a Flow Reactor: The Effect of the Support
作者:E. A. Artyukha、A. L. Nuzhdin、G. A. Bukhtiyarova、E. A. Derevyannikova、E. Yu. Gerasimov、A. Yu. Gladkii、V. I. Bukhtiyarov
DOI:10.1134/s0023158418050014
日期:2018.9
an amino group with the presence of acid sites, which facilitate imine formation as a result of the interaction of n-heptanal with p-toluidine, on the catalyst surface is necessary for reaching the greatest yield of N-heptyl-p-toluidine. The study of reaction mechanism on the 5%Cu/Al2O3 catalyst showed that p-nitrotoluene inhibits the hydrogenation of n-heptanal, and aldehyde hydrogenation into alcohol
支撑在铜催化剂的性质支持体的作用的γ-Al 2 ö 3的SiO 2,以及TiO 2 -SiO 2具有〜5重量%的Cu含量是在一锅合成的研究Ñ -heptyl-对硝基甲苯和n中的对甲苯胺-庚。通过元素分析,X射线衍射分析,透射电子显微镜,程序升温还原和低温氮吸附对催化剂进行了表征。该反应在流动反应器中使用分子氢作为还原剂进行。已经确定,载体的性质对目标仲胺的产率具有深远的影响。在这种情况下,发现5%Cu / Al 2 O 3是活性最高的催化剂。在硝基加氢成氨基的同时具有酸性位点的高催化剂活性的组合,由于正庚醛与p的相互作用而促进了亚胺的形成为了获得最大产率的N-庚基-对甲苯胺,催化剂表面上的对甲苯胺是必需的。对5%Cu / Al 2 O 3催化剂的反应机理的研究表明,对硝基甲苯抑制了正庚醛的氢化,醛的氢化仅在大部分对硝基甲苯转化之后才开始。在反应混合物中同时存在对硝基甲苯和正庚醛的条件下对硝基芳烃的选择性吸附
Synthesis of secondary amines by reductive amination of aldehydes with nitroarenes over supported copper catalysts in a flow reactor
作者:Alexey L. Nuzhdin、Ekaterina A. Artiukha、Galina A. Bukhtiyarova、Elizaveta A. Derevyannikova、Valerii I. Bukhtiyarov
DOI:10.1016/j.catcom.2017.09.001
日期:2017.12
Supported copper catalysts were investigated for the one-pot reductiveamination of aldehydes with nitroarenes in a continuous flow reactor. This process is considered advantageous compared to current traditional methods, which present several drawbacks, such as toxicity of reducing or alkylation agent, lack of monoalkylation selectivity and large amounts of waste produced. Various secondary amines
Copper-catalyzed amination of aromatic halides with 2-N,N-dimethylaminoethanol as solvent
作者:Zhikuan Lu、Robert J. Twieg、Songping D. Huang
DOI:10.1016/s0040-4039(03)01536-3
日期:2003.8
A copper-catalyzedamination of aromatic halides under mild conditions using N,N-dimethylaminoethanol as solvent is described. We have studied this reaction in some detail varying the copper source, base, water content and other parameters including the scope of useful amine and aromatic halide structures. A variety of 4-halo-N,N-cycloalkylanilines and 2-N,N-cycloalkylaminothiophenes were synthesized