期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 21, 期 20, 页码 7355-7359出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201500998
关键词
asymmetric catalysis; iridium; metal-centered chirality; photoredox catalysis; visible light
资金
- German Research Foundation [ME 1805/4-1]
- Philipps-Universitat Marburg
- China Scholarship Council
A single chiral octahedral iridium(III) complex is used for visible light activated asymmetric photoredox catalysis. In the presence of a conventional household lamp and under an atmosphere of air, the oxidative coupling of 2-acyl-1-phenylimidazoles with N,N-diaryl-N-(trimethylsilyl)methylamines provides aminoalkylated products in 61-93% yields with high enantiomeric excess (90-98% ee). Notably, the iridium center simultaneously serves three distinct functions: as the exclusive source of chirality, as the catalytically active Lewis acid, and as a central part of the photoredox sensitizer. This conceptionally simple reaction Scheme may provide new avenues for the green synthesis of non-racemic chiral molecules.
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