Flow synthesis of secondary amines over Ag/Al<sub>2</sub>O<sub>3</sub> catalyst by one-pot reductive amination of aldehydes with nitroarenes
作者:Ekaterina A. Artiukha、Alexey L. Nuzhdin、Galina A. Bukhtiyarova、Valerii I. Bukhtiyarov
DOI:10.1039/c7ra08986d
日期:——
An alumina-supported silver catalyst was investigated in the one-pot reductiveamination of aldehydes with nitroarenes in a continuous flow reactor using molecular hydrogen as a reducing agent. A series of secondary amines containing alkyl, OH, OCH3, Cl, Br and CC groups was synthesized in good to excellent yields. The yield of the secondary amine depends on the rate of formation of an intermediate
Synthesis of unsaturated secondary amines by direct reductive amination of aliphatic aldehydes with nitroarenes over Au/Al<sub>2</sub>O<sub>3</sub>catalyst in continuous flow mode
作者:A. L. Nuzhdin、E. A. Artiukha、G. A. Bukhtiyarova、S. Yu Zaytsev、P. E. Plyusnin、Yu V. Shubin、V. I. Bukhtiyarov
DOI:10.1039/c6ra20904a
日期:——
A series of unsaturated secondary amines was successfully synthesized by direct reductive amination of aliphatic aldehydes with nitroarenes over a 2.5% Au/Al2O3 catalyst in a continuous flow reactor using molecular hydrogen as a reducing agent. In most cases, the targeted secondary amines were obtained in good to excellent yields. Interestingly, the hydrogenation of CC group is practically absent in
在连续流动反应器中,使用分子氢作为还原剂,通过在2.5%Au / Al 2 O 3催化剂上用硝基芳烃直接将脂肪族醛与硝基芳烃进行还原胺化反应,成功合成了一系列不饱和仲胺。在大多数情况下,目标仲胺以良好至极好的收率获得。有趣的是,在反应条件下,起始醛和仲胺中实际上都没有C C基团的氢化。发现在对位和间位引入了供电子取代基硝基苯的-位增加了仲胺的产率,而在邻位上具有吸电子取代基或供电子的取代基的硝基苯的情况下,观察到目标产物的产率降低。