Chiral ligands, transition-metal complexes thereof and uses thereof in asymmetric reactions
                        
                            
                                申请人:The Penn State Research Foundation
                            
                            
                                公开号:US20030163003A1
                            
                            
                                公开(公告)日:2003-08-28
                            
                            Chiral ligands and transition metal complexes based on such chiral ligands useful in asymmetric catalysis are disclosed. The chiral ligands include phospholanes, P,N ligands, N,N ligands, biphenols, and chelating phosphines. The ferrocene-based irridium (R,R)-f-binaphane complex reduces imines to the corresponding amines with 95-99.6% enantioselectivity and reduces &bgr;-substituted-&agr;-arylenamides with 95% enantioselectivity.
The transition metal complexes of the chiral ligands are useful in asymmetric reactions such as asymmetric hydrogenation of imines, asymmetric hydride transfer reactions, hydrosilylation, hydroboration, hydrovinylation, hydroformylation, allylic alkylation, cyclopropanation, Diels-Alder reaction, Heck reaction, isomerization, Aldol reaction, Michael addition and epoxidation reactions.
                            本发明公开了基于手性
配体的手性
配体和过渡
金属配合物,用于不对称催化。这些手性
配体包括
磷杂环、P,N
配体、N,N
配体、双
苯酚和螯合
磷。基于
二茂铁的
镭(R,R)-f-双
萘配合物将
亚胺还原为相应的胺,其对映选择性为95-99.6%,并将β-取代的α-芳基酰胺还原,其对映选择性为95%。这些手性
配体的过渡
金属配合物在不对称反应中有重要应用,例如
亚胺的不对称加氢、不对称
氢化物转移反应、氢
硅化、氢
硼化、氢
乙烯基化、氢甲酰化、联烯基烷基化、
环丙烷化、Diels-Alder反应、Heck反应、异构化、Aldol反应、Michael加成和环氧化反应。