Design and synthesis of a novel three-hindered quadrant bisphosphine ligand and its application in asymmetric hydrogenation
作者:Kexuan Huang、Xiaowei Zhang、Thomas J. Emge、Guohua Hou、Bonan Cao、Xumu Zhang
DOI:10.1039/c0cc02620d
日期:——
A novel three hindered quadrant bisphosphine ligand has been synthesized. The ligand shows excellent enantioselectivities and reactivities for rhodium-catalyzed hydrogenations of various functionalized olefins.
More electron donating, more rigid: A new highly electron‐donating P‐stereogenic bisphospholaneligand (ZhangPhos) was synthesized in a practical and highlyenantioselective 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