New chiral cationic rhodium-aminophosphine complexes for asymmetric transfer hydrogenation of aromatic ketones

被引:67
作者
Gao, JX [1 ]
Yi, XD
Xu, PP
Tang, CL
Wan, HL
Ikariya, T
机构
[1] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Inst Phys Chem, Dept Chem, Xiamen 361005, Fujian, Peoples R China
[2] Tokyo Inst Technol, Fac Engn, Dept Chem Engn, Meguro Ku, Tokyo 1528552, Japan
基金
中国国家自然科学基金;
关键词
chiral ligand; chiral rhodium complexes; transfer hydrogenation; prochiral ketone; asymmetric reduction;
D O I
10.1016/S0022-328X(99)00565-3
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The new chiral ligands (S,S)-N,N'-bis[o-(diphenylphosphino)benzylidene]1,2-diiminocyclohexane, [(S,S)-1] and (S,S)-N,N'-bis[o-diphenylphosphino]benzyl-1,2-diaminocyclohexane, [(S,S)-2] have been prepared. The interaction of [(S,S)-1] and [(S,S)-2] with [Rh(COD)Cl](2) afforded the corresponding cationic rhodium complexes [(S,S)-3][X] and [(S,S)-4][X] (X = PF6-, BF4- or ClO4-), respectively. [(S,S)-1], [(S,S)-2], [(S,S)-3][X] and [(S,S)-4][X] have been fully characterized by elemental analyses and spectroscopic methods. These chiral cationic rhodium complexes serve as catalytst precursors for the asymmetric transfer hydrogenation of acetophenone derivatives in 2-propanol and [(S,S)-4][PF6] acts as an excellent catalyst in the reduction of m-chloroacetophenone, giving the corresponding optical alcohols in 99% yield and up to 94% ee. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:290 / 295
页数:6
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