Transfer Hydrogenation of Activated CC Bonds Catalyzed by Ruthenium Amido Complexes: Reaction Scope, Limitation, and Enantioselectivity
作者:Dong Xue、Ying-Chun Chen、Xin Cui、Qi-Wei Wang、Jin Zhu、Jin-Gen Deng
DOI:10.1021/jo0478205
日期:2005.4.1
diamine−Ru(II)−(arene) systems was investigated to explore the asymmetric transfer hydrogenation of prochiral α,α-dicyanoolefins. Two parameters had been systematically studied, (i) the structure of the N-sulfonylated chiral diamine ligands, in which several chiral diamines substituted on the benzene ring of DPEN were first reported, and (ii) the structure of the metal precursors, and high enantioselectivitiy (up to
发现在二胺-钌配合物催化的活化的α,β-不饱和酮的转移氢化中,化学选择性可以从C O完全切换为C C键。此外,这种经由金属氢化物的添加已经被用于还原各种活化的烯烃。在α或β位的C C键上取代的官能团的吸电子能力对反应性有很大影响。另外,还研究了多种手性二胺-Ru(II)-(芳烃)体系,以探索前手性α,α-二氰基烯烃的不对称转移加氢反应。系统地研究了两个参数:(i)N的结构-磺酰化手性二胺配体,其中首先报道了在DPEN苯环上取代的几种手性二胺,和(ii)金属前体的结构,并且在β-碳上获得了高对映选择性(ee高达89%) 。