作者:Uttam Kumar Das、Amit Kumar、Yehoshoa Ben-David、Mark A. Iron、David Milstein
DOI:10.1021/jacs.9b05591
日期:2019.8.21
We report the hydrogenation of carbamates and urea derivatives, two of the most challenging carbonyl compounds to be hydrogenated, catalyzed for the first time by a complex of an earth-abundant-metal. The hydrogenation reaction of these CO2-derived compounds, cata-lyzed by a manganese pincer complex, yields methanol in addition to amine and alcohol, which makes this methodology a sustainable two-step
我们报告了氨基甲酸酯和尿素衍生物的氢化,这两种最具挑战性的羰基化合物被氢化,首次由地球丰富的金属络合物催化。这些 CO2 衍生化合物的氢化反应在锰钳络合物的催化下产生甲醇以及胺和醇,这使得该方法成为将 CO2 转化为甲醇的可持续两步路线,包括碱-金属催化剂。此外,氢化在温和压力(20巴)下进行。我们的观察结果支持涉及 Mn-H 络合物的氢化机制。基于信息丰富的机械实验提出了一个合理的催化循环。