Cobalt-Catalyzed Enantioselective Hydrogenation of Diaryl Ketones with Ferrocene-Based Secondary Phosphine Oxide Ligands
作者:Liyao Zeng、Menglong Zhao、Bijin Lin、Jingyuan Song、James H. R. Tucker、Jialin Wen、Xumu Zhang
DOI:10.1021/acs.orglett.3c02530
日期:2023.8.25
A new class of cobalt catalytic system for asymmetric hydrogenation of ketones was herein reported, involving the development of novel ferrocene-based secondary phosphine oxide ligands. An unusual P–O bidentate coordination pattern with cobalt was confirmed by an X-ray diffraction study. The bichelating tetrahedral cobalt(II) complexes afforded high reactivities (up to 99% yield) and good to excellent
本文报道了一种用于酮不对称氢化的新型钴催化系统,涉及新型二茂铁基二氧化膦配体的开发。X 射线衍射研究证实了与钴的不寻常的 P-O 二齿配位模式。双螯合四面体钴(II)配合物在各种邻位取代的二芳基酮的AH中具有高反应活性(产率高达99%)和良好至优异的对映选择性(高达92% ee)。此外,二茂铁基钴配合物具有有趣的紫外-可见吸收和电化学性质。