Phosphine ligands in the ruthenium-catalyzed reductive amination without an external hydrogen source
作者:Maria Makarova、Oleg I. Afanasyev、Fedor Kliuev、Yulia V. Nelyubina、Maria Godovikova、Denis Chusov
DOI:10.1016/j.jorganchem.2021.121806
日期:2021.6
A systematic study of the phosphine additives influence on the activity of a ruthenium catalyst in reductive amination without an external hydrogen source was carried out. [CymeneRuCl2]2 was used as a reference catalyst, and a broad set of phosphines including Alk3P, Alk2ArP, Ar3P and X3P was screened. Three complexes of general formula (Cymene)RuCl2PR3 were isolated in a pure form, and their catalytic
在没有外部氢源的情况下,对膦添加剂对钌催化剂在还原胺化中的活性的影响进行了系统的研究。[CymeneRuCl 2 ] 2用作参考催化剂,并筛选出包括Alk 3 P,Alk 2 ArP,Ar 3 P和X 3 P在内的各种膦。以纯形式分离了三种通式(Cymene)RuCl 2 PR 3的配合物,并将其催化活性与原位进行了比较生成的复合体。发现具有电子受体基团的无阻碍的三芳基膦是最透视的活化剂,大约增加了催化剂的活性。六倍,Alk 2 ArP配体的影响较小,而三烷基膦使钌催化剂失活。