Synthesis, Structure, Reactivity, and Catalytic Activity of Cyclometalated (Phosphine)‐ and (Phosphinite)ruthenium Complexes
作者:Ruichen Sun、Xiaodan Chu、Shaowei Zhang、Tongyu Li、Zhuo Wang、Bolin Zhu
DOI:10.1002/ejic.201700479
日期:2017.7.7
of cycloruthenated complexes, were explored, including conversion of 1a,b to 2a,b, a substitution reaction of the η6-arene ligand in 2a, synthesis of a bis(phosphine) complex starting from 2b, and reaction of 2a with diphenylacetylene. Besides, their catalytic activity on the reduction of ketones by transfer hydrogenation was also tested. The molecular structures of nine compounds, 1b, 2a, and 4–10
萘基和邻甲基苯基取代的膦与 [RuCl2(p-cymene)]2 的反应产生相应的膦取代的二氯化钌(1a、b 和 3)。当芳基取代的膦或次膦酸盐与 [RuCl2(p-cymene)]2 在乙酸钠存在下进行反应时,芳基取代的膦或次膦酸盐被环金属化,得到相应的五元金属环配合物 (2a, b 和 4-6) 通过 C(sp2)-H 或 C(sp3)-H 键的分子内活化。竞争反应表明,在相同条件下,芳香族 C(sp2)-H 键比 C(sp3)-H 键更容易被激活,并且优先形成五元环而不是六元环. 研究了环钌络合物的两个代表 2a、b 的化学反应性,包括1a,b转化为2a,b,2a中η6-芳烃配体的取代反应,从2b开始合成双(膦)配合物,2a与二苯乙炔反应。此外,还测试了它们对通过转移氢化还原酮的催化活性。通过单晶 X 射线衍射确定了九种化合物 1b、2a 和 4-10 的分子结构。