Synthesis, Structural Analysis, and Catalytic Properties of Tetrakis(binaphthyl or octahydrobinaphthyl phosphate) Dirhodium(II,II) Complexes
作者:Radim Hrdina、Laure Guénée、Delphine Moraleda、Jérôme Lacour
DOI:10.1021/om300935u
日期:2013.1.28
The X-ray structural analyses of homoleptic Rh(II) complexes made of enantiopure (R)-1,1′-binaphthyl and (R)-(5,5′,6,6′,7,7′,8,8′-octahydro)binaphthyl phosphate ligands are for the first time presented. The possibility to introduce halogen atoms at the 3,3′-positions is also reported. The isolated dirhodium complexes were further tested as catalysts (1 mol %) in enantioselective cyclopropanations and
对映纯(R)-1,1'-联萘和(R)-(5,5',6,6',7,7',8,8制成的Rhho II配合物的X射线结构分析首次出现了'-八氢)联萘磷酸酯配体。还报道了在3,3'-位引入卤素原子的可能性。分离出的铱络合物在对映选择性环丙烷化和Si-H插入反应中作为催化剂(1 mol%)进行了进一步测试,以高收率但中等的对映选择性(ee最大值为63%)提供了手性环丙烷和硅烷。