General Synthetic Route to Chiral Flexible Biphenylphosphine Ligands: The Use of a Chiral Additive Enables the Preparation and Observation of Metal Complexes Incorporating the Enantiopure Form
作者:Koichi Mikami、Kohsuke Aikawa、Toshinobu Korenaga
DOI:10.1021/ol0068896
日期:2001.1.1
enantio- and diastereomerically pure metal complex of a chirally flexible BIPHEP ligand is obtained through enantiomer-selective coordination of a BIPHEP-Ru complex with enantiopure 3,3'-dimethyldiaminobinaphthyl, DM-DBN, followed by epimerization of the remaining BIPHEP-Ru enantiomer to complex with DM-DABN. Thus, an efficient and general synthetic route to a variety of substituted BIPHEP ligands from biphenol
[图:见正文]手性柔性BIPHEP配体的对映体和非对映体纯金属络合物是通过将BIPHEP-Ru络合物与对映纯3,3'-二甲基二氨基联萘,DM-DBN的对映异构体选择性配位,然后进行差向异构化而获得的剩余的BIPHEP-Ru对映异构体可与DM-DABN络合。因此,描述了从双酚到各种取代的BIPHEP配体的有效且通用的合成途径,以及在它们的Ru(II)配合物中观察到对映体纯的BIPHEP配体。