Preparation of pyrrolidine–oxazoline containing ligands and their application in asymmetric transfer hydrogenation
作者:Helen A McManus、Sarah M Barry、Pher G Andersson、Patrick J Guiry
DOI:10.1016/j.tet.2004.02.038
日期:2004.4
oxazoline ring and a pyrrolidine unit were prepared in an efficient four-step synthesis starting from readily available chiral amino alcohols and proline. A study of these ligands in the asymmetric transfer hydrogenation of acetophenone showed that the catalysts formed from [Ir(cod)Cl]2 were the most active while those derived from [Ru(p-cymene)Cl2]2 gave the highest enantioselectivities (up to 61% ee)
New Binaphthyl-Proline-Based Chiral Ligands Bearing Imidazoline Groups: Design, Synthesis, and Their Application in Enantioselective Conjugate Addition of 4-Hydroxycoumarin and Related Nucleophiles to β,γ-Unsaturated α-Ketoesters
作者:Shibo Yu、Qihang Cai、Tianxu Yu、Jiahui Li、Chao Yao、Yue-Ming Li
DOI:10.1021/acs.joc.3c01262
日期:2023.11.3
This paper describes the design and application of new binaphthyl-proline-based chiral ligands bearing imidazoline functional groups. These chiral ligands incorporate the advantages of both the binaphthyl and proline skeletons, they are featured with regulatable electronic and steric properties for the imidazoline functional groups, and form chiral complexes with different metal salts such as cuprous