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。