Reductive Amination of Carbonyl Compounds over a Ni2P/SiO2 Catalyst in a Flow Mode
作者:Y. Wang、A. L. Nuzhdin、I. V. Shamanaev、G. A. Bukhtiyarova
DOI:10.1134/s0023158422060155
日期:2022.12
catalyst supported on silica gel in the reductive amination of carbonyl compounds were studied in a flow reactor using molecular hydrogen as a reducing agent. The reaction was carried out in toluene with a slight excess of amine at a total pressure of 10 bar and a temperature of 140–170°C. With the use of primary aliphatic amines, the 6.3% Ni2P/SiO2 catalyst provided the formation of secondary amines with
摘要 在流动反应器中使用分子氢作为还原剂研究了负载在硅胶上的磷化镍催化剂在羰基化合物还原胺化中的催化性能。反应在甲苯和略微过量的胺中进行,总压力为 10 巴,温度为 140–170°C。使用脂肪族伯胺,6.3% Ni 2 P/SiO 2催化剂提供仲胺的形成,产率为99%。目标产物的产率取决于羰基化合物并按以下顺序降低:脂肪醛 > 脂肪酮 ~ 芳香醛 > 芳香酮。这可以通过该序列中亲电子性质的降低来解释。与此同时,在涉及较弱亲核试剂芳香胺的反应中,仲胺的产率要低得多。