Asymmetric Induction at Remote Quaternary Centers of Cyclohexadienones by Rhodium-Catalyzed Conjugate Hydrosilylation

被引:50
|
作者
Naganawa, Yuki [1 ]
Kawagishi, Mayu [1 ]
Ito, Jun-ichi [1 ]
Nishiyama, Hisao [1 ]
机构
[1] Nagoya Univ, Grad Sch Engn, Dept Appl Chem, Chikusa Ku, Nagoya, Aichi 4648603, Japan
基金
日本学术振兴会;
关键词
asymmetric synthesis; desymmetrization; hydrosilylation; quaternary centers; rhodium; ENANTIOSELECTIVE CONSTRUCTION; NATURAL-PRODUCTS; FACILE SYNTHESIS; HECK ARYLATIONS; REDUCTION; DESYMMETRIZATION; ESTERS; TRANSFORMATIONS; STEREOCENTERS; BEARING;
D O I
10.1002/anie.201601636
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The enantioselective desymmetrizing conjugate hydrosilylation of prochiral differently gamma, gamma-disubstituted cyclohexadienone derivatives 2 to furnish the corresponding cyclohexenones 4 with a remote chiral all-carbon quaternary center at the g position is described. Chiral rhodium-bis(oxazolinyl)-phenyl complexes 1 were effective catalysts for this transformation. This catalytic system was extended to the asymmetric transformation of spirocarbocyclic cyclohexadienones 5 to give the corresponding products 6 with high enantiomeric ratios.
引用
收藏
页码:6873 / 6876
页数:4
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