Sustainable hydrogenation of aliphatic acyclic primary amides to primary amines with recyclable heterogeneous ruthenium–tungsten catalysts
作者:Robin Coeck、Sarah Berden、Dirk E. De Vos
DOI:10.1039/c9gc01310e
日期:——
Lewis acid promotor, NH3 partial pressure is identified as the key parameter leading to high primary amine yields. In our model reaction with hexanamide, yields of up to 83% hexylamine could be achieved. Beside the NH3 partial pressure, we investigated the effect of the catalyst support, PGM-Lewis acid ratio, H2 pressure, temperature, solvent tolerance and product stability. Finally, the catalyst was characterized
酰胺的氢化是生产(可能是基于生物的)胺的直接方法。然而,目前的酰胺加氢催化剂仅在相当有限范围的有毒溶剂中得到验证,并且很少研究脂族(无环)伯酰胺的加氢。在这里,我们报告了在绿色和良性溶剂环戊基甲基醚(CPME)中使用一种相对便宜的新型钌-钨双金属催化剂。除了路易斯酸促进剂的作用外,NH 3分压被认为是导致高伯胺收率的关键参数。在我们与己酰胺的模型反应中,可以达到高达83%的己胺收率。在NH 3旁边分压下,我们研究了催化剂载体,PGM-路易斯酸比,H 2压力,温度,溶剂耐受性和产品稳定性的影响。最后,对催化剂进行了表征,并证明其非常稳定,非常适合于各种酰胺的氢化。