Giving a Second Chance to Ir/Sulfoximine-Based Catalysts for the Asymmetric Hydrogenation of Olefins Containing Poorly Coordinative Groups
作者:Maria Biosca、Oscar Pàmies、Montserrat Diéguez
DOI:10.1021/acs.joc.9b00829
日期:2019.6.21
This work identifies a family of Ir/phosphite-sulfoximine catalysts that has been successfully used in the asymmetric hydrogenation of olefins with poorly coordinative or noncoordinative groups. In comparison with analogue Ir/phosphine-sulfoximine catalysts previously reported, the presence of a phosphite group extended the range of olefins than can be efficiently hydrogenated. High enantioselectivities
这项工作确定了Ir /亚磷酸酯-亚砜亚胺催化剂系列,已成功用于配位或非配位基团较弱的烯烃的不对称加氢中。与先前报道的类似的Ir /膦-亚砜亚胺催化剂相比,亚磷酸酯基团的存在扩展了烯烃的范围,而无法有效地氢化。对于包含相关的弱配位基团的各种烯烃(例如α,β-不饱和烯酮,酯,内酯和内酰胺以及烯基硼酸酯),已经实现了与对等最佳化合物相当的高对映选择性。