A Theoretically-Guided Optimization of a New Family of Modular P,S-Ligands for Iridium-Catalyzed Hydrogenation of Minimally Functionalized Olefins
作者:Jèssica Margalef、Xisco Caldentey、Erik A. Karlsson、Mercè Coll、Javier Mazuela、Oscar Pàmies、Montserrat Diéguez、Miquel A. Pericàs
DOI:10.1002/chem.201402978
日期:2014.9.15
thioether‐phosphite/phosphinite ligands has been evaluated in the asymmetric iridium‐catalyzed hydrogenation of minimally functionalized olefins. The modular ligand design has been shown to be crucial in finding highly selective catalysts for each substrate. A DFT study of the transition state responsible for the enantiocontrol in the Ir‐catalyzed hydrogenation is also described and used for further optimization
在最小功能化烯烃的不对称铱催化氢化中,已经评估了衍生自硫醚-亚磷酸酯/次亚膦酸酯配体的模块化铱配合物库。已经表明,模块化配体设计对于寻找每种底物的高选择性催化剂至关重要。DFT研究了在Ir催化的加氢过程中负责对映体控制的过渡态研究,并将其用于进一步优化关键的立体定义部分。对于多种底物(包括E-和Z),均获得了出色的对映选择性(对映体过量(ee)值高达99%)三取代和二取代的烯烃,α,β-不饱和烯酮,三和二取代的烯基硼酸酯以及具有三氟甲基取代基的烯烃。