甲醛是许多工业过程的重要前体,每年在能量不利和原子效率低的工业过程中通过甲醇催化氧化产生数百万吨的规模。在这项工作中,我们提出了一种使用均相钌催化剂从二氧化碳和氢气开始的甲醛衍生物的高选择性一步合成。在这里,甲醛是通过在中等温度 (90 °C) 和分压 (90 bar H2/20 bar CO2) 下在甲醇存在下选择性还原二氧化碳而获得的二甲氧基甲烷,即其二甲基缩醛。除了所需的产物外,仅形成甲酸甲酯,可在连续的催化步骤中将其转化为二甲氧基甲烷。通过对催化体系的综合筛选,
Triphos derivatives and diphosphines as ligands in the ruthenium-catalysed alcohol amination with NH<sub>3</sub>
作者:N. Nakagawa、E. J. Derrah、M. Schelwies、F. Rominger、O. Trapp、T. Schaub
DOI:10.1039/c5dt04870b
日期:——
triphos derivatives with electron-donating functional group were synthesized and used as ligands in the Ru-catalysed alcohol amination with NH3. The triphos derivatives are effective for the formation of primary amines. On the other hand, if hemilabile diphosphines as tridentate ligands are used, mixtures of secondary-along with primary amines are obtained. It was found that even simple diphosphines can