Rhodium-Catalyzed Asymmetric Hydrosilylation of Ketones Employing a New Ligand Embodying the Bis(oxazolinyl)pyridine Moiety
作者:J. Jayashankaran、Atanu Ghoshal、Asit Sarkar、Govindaswamy Manickam、R. Kumaran
DOI:10.1055/s-0029-1219949
日期:2010.6
approach to new ligands embodying bis(oxazolinyl)pyridine has been developed, employing palladium-catalyzed Suzuki coupling and base-mediated cyclization as pivotal steps. A rhodium catalyst derived from the ligand 4-(4-ethylphenyl)-2,6-bis(4-isopropyl-4,5-dihydrooxazol-2-yl)pyridine gave excellent enantioselectivity in the asymmetric hydrosilylation of ketones. In addition the electronic effect of remote
已经开发了一种包含双(恶唑啉基)吡啶的新配体的通用方法,采用钯催化的 Suzuki 偶联和碱介导的环化作为关键步骤。衍生自配体 4-(4-乙基苯基)-2,6-双(4-异丙基-4,5-二氢恶唑-2-基)吡啶的铑催化剂在酮的不对称氢化硅烷化中具有优异的对映选择性。此外还研究了远程取代基对铑催化剂催化活性的电子效应。