Selective Synthesis of Primary Anilines from NH
<sub>3</sub>
and Cyclohexanones by Utilizing Preferential Adsorption of Styrene on the Pd Nanoparticle Surface
作者:Yu Koizumi、Xiongjie Jin、Takafumi Yatabe、Ray Miyazaki、Jun‐ya Hasegawa、Kyoko Nozaki、Noritaka Mizuno、Kazuya Yamaguchi
DOI:10.1002/anie.201903841
日期:2019.8.5
Dehydrogenative aromatization is one of the attractive alternative methods for directly synthesizing primary anilines from NH3 and cyclohexanones. However, the selective synthesis of primary anilines is quite difficult because the desired primary aniline products and the cyclohexanone substrates readily undergo condensation affording the corresponding imines (i.e., N‐cyclohexylidene‐anilines), followed
脱氢芳构化是直接从NH 3和环己酮合成伯苯胺的有吸引力的替代方法之一。然而,伯胺的选择性合成非常困难,因为所需的伯苯胺产物和环己酮底物容易发生缩合反应,生成相应的亚胺(即N-环己叉基苯胺),然后氢化生成N-环己基苯胺作为主要产物。 。在这项研究中,在负载的Pd纳米颗粒催化剂(例如Pd / HAP,HAP =羟基磷灰石,Ca 10(PO 4)6(OH)2)利用非均相催化特有的竞争性吸附; 换句话说,当苯乙烯用作氢受体时,在N-环己叉基-苯胺存在下优先吸附在Pd纳米颗粒表面上,从容易获得的NH 3和环己酮中选择性合成了各种结构多样的伯苯胺。尽管Pd / HAP催化剂的催化性能逐渐下降,但仍重复使用了好几次。