Pyrrolidine‐Based P,O Ligands from Carbohydrates: Easily Accessible and Modular Ligands for the Ir‐Catalyzed Asymmetric Hydrogenation of Minimally Functionalized Olefins
作者:Pilar Elías‐Rodríguez、Carlota Borràs、Ana T. Carmona、Jorge Faiges、Inmaculada Robina、Oscar Pàmies、Montserrat Diéguez
DOI:10.1002/cctc.201801485
日期:2018.12.7
The potential of P,O‐iminosugar based ligands in the Ir‐catalyzed asymmetric hydrogenation of minimally functionalized olefins is presented. These new ligands were prepared from easily available carbohydrates (D‐mannose, D‐ribose and D‐arabinose). The stereochemical and polyfunctional diversity of carbohydrates allowed the modulation of the ligands, both from their electronic properties and the rigidity
提出了基于P,O-亚氨基糖的配体在Ir催化的最小官能化烯烃的不对称加氢中的潜力。这些新的配体由容易获得的碳水化合物(D-甘露糖,D-核糖和D-阿拉伯糖)制备。碳水化合物的立体化学和多官能度多样性可从其电子特性和主链刚性两个方面对配体进行调节。在选定的三取代和二取代的底物进行氢化反应时,可以达到较高的对映选择性(ee高达99%)。