Control of N-Heterocyclic Carbene Catalyzed Reactions of Enals: Asymmetric Synthesis of Oxindole-γ-Amino Acid Derivatives

被引:50
|
作者
Chen, Xiang-Yu [1 ]
Xiong, Jia-Wen [1 ]
Liu, Qiang [1 ]
Li, Sun [1 ]
Sheng, He [1 ]
von Essen, Carolina [2 ]
Rissanen, Kari [2 ]
Enders, Dieter [1 ]
机构
[1] Rhein Westfal TH Aachen, Inst Organ Chem, Landoltweg 1, D-52074 Aachen, Germany
[2] Univ Jyvaskyla, Dept Chem, Nanosci Ctr, Jyvaskyla 40014, Finland
基金
欧洲研究理事会;
关键词
asymmetric synthesis; carbenes; cycloaddition; lactams; oxindoles; QUATERNARY STEREOGENIC CENTERS; BOND-FORMING REACTIONS; ONE-POT SYNTHESIS; STEREOSELECTIVE-SYNTHESIS; ALPHA; BETA-UNSATURATED ALDEHYDES; COOPERATIVE CATALYSIS; ANNULATION REACTIONS; HOMOENOLATE ADDITIONS; EFFICIENT SYNTHESIS; SPIRO-HETEROCYCLES;
D O I
10.1002/anie.201708994
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A strategy to control the switch between a non-cycloaddition reaction and a cycloaddition reaction of enals, using N-heterocyclic carbene (NHC) catalyisis, has been developed. The new scalable protocol leads to gamma-amino-acid esters bearing a tetrasubstituted stereocenter in good yields and high stereoselectivities by homo-Mannich reactions of enals and isatin-derived ketimines. By simply changing the N-ketimine substituent to an ortho-hydroxy phenyl group, the corresponding spirocyclic oxindolo-gamma-lactams are obtained.
引用
收藏
页码:300 / 304
页数:5
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