cationic complex 34, whose X-ray structures were established. The catalysts carrying the new ligands demonstrated high activity (99% conversion) in the palladium-catalyzed allylic substitution. The resolution of three of the ligands, 6, 8, and 15, was achieved, and the catalyst with the enantioenriched P–N ligand 15 delivered fairly good enantioselectivity in asymmetric allylic substitution.
单-和二齿
配体(5 - 8,15 - 18,20,29 - 31)已经被合成,其中的氧膦基取代一个(η 5 -cyclohexadienyl)的Mn(CO)3支架。在双齿
配体之一15的情况下,研究了相应的Pd配合物的形成。取决于反应的溶剂,该配合物出乎意料地提供了两种双
金属配合物:中性配合物33和阳离子配合物34,其X射线结构已建立。带有新
配体的催化剂在
钯催化的烯丙基取代中表现出高活性(99%转化率)。三个
配体,所述的分辨率6,8,和15,达到了,并且与对映体富集P-N的催化剂配位体15在不对称烯丙位取代递送相当良好的对映选择性。