Electron-Donating and Rigid P-Stereogenic Bisphospholane Ligands for Highly Enantioselective Rhodium-Catalyzed Asymmetric Hydrogenations
作者:Xiaowei Zhang、Kexuan Huang、Guohua Hou、Bonan Cao、Xumu Zhang
DOI:10.1002/anie.201002990
日期:2010.8.23
More electron donating, more rigid: A new highly electron‐donating P‐stereogenic bisphospholane ligand (ZhangPhos) was synthesized in a practical and highly enantioselective manner from a commercially available chiral source. Better or comparable enantioselectivities and reactivities than TangPhos were achieved in rhodium‐catalyzed hydrogenation of various functionalized olefins (see scheme; nbd=3
给电子更多,更刚性:一种新的高度电子给体的P-stereogenic bisphospholane配体(ZhangPhos)从实用的手性来源中以实用且高度对映选择性的方式合成。在铑催化的各种官能化烯烃的氢化反应中,与TangPhos相比,具有更好或相当的对映选择性和反应性(参见方案; nbd = 3,5-降冰片二烯)。