Chiral rare-earth metal complexes with a tridentate amido-fluorenyl ligand: Syntheses, structures and catalytic performance
作者:Zhuo Chai、Yemei Wang、Mujun Tang、Xiaolong Mu、Jinsong Hou、Gaosheng Yang
DOI:10.1016/j.jorganchem.2017.06.024
日期:2017.10
The complexes of rare-earth metals (Y, La, Sm and Lu) with a chiral tridentate amido-fluorenyl ligand were synthesized and characterized. These complexes demonstrated high efficiency in catalyzing both the intramolecular hydroamination of non-activated olefins and the cyanosilylation of ketones under very mild conditions, however, with no enantiocontrol being achieved. 1H NMR monitoring of the reaction
合成并表征了稀土金属(Y,La,Sm和Lu)与手性三齿酰胺基芴基配体的配合物。在非常温和的条件下,这些络合物在催化非活化烯烃的分子内加氢胺化和酮的氰基甲硅烷基化方面均显示出高效率,但是,没有实现对映体控制。反应过程的1 H NMR监测表明,芴基部分的弱配位能力可能是造成这种转化中手性配合物缺乏不对称诱导能力的原因。