Phosphite‐thioether/selenoether Ligands from Carbohydrates: An Easily Accessible Ligand Library for the Asymmetric Hydrogenation of Functionalized and Unfunctionalized Olefins
作者:Jèssica Margalef、Carlota Borràs、Sabina Alegre、Elisabetta Alberico、Oscar Pàmies、Montserrat Diéguez
DOI:10.1002/cctc.201900132
日期:2019.4.18
phosphite‐thioether/selenoether ligands has been easily prepared from accessible L‐(+)‐tartaric acid and D‐(+)‐mannitol and applied in the M‐catalyzed (M=Ir, Rh) asymmetric hydrogenation of a broad number of substrates (46 in total). Its highly modular architecture has been crucial to maximize the catalytic performance. Improving most of the reported approaches, this ligand family presents a broad substrate
可以轻松地从可及的L-(+)-酒石酸和D-(+)-甘露糖醇制备大量亚磷酸酯-硫醚/硒醚配体,并将其应用于M-催化的(M = Ir,Rh)不对称加氢反应中。大量的基材(总共46种)。其高度模块化的体系结构对于最大化催化性能至关重要。改进了大多数已报道的方法,该配体家族提供了广泛的底物范围。通过选择配体参数,因此在功能化和非功能化底物的广泛范围内都实现了高对映选择性(ee高达99%)。有趣的是,通常可以通过改变配体参数来获得氢化产物的两种对映异构体。