期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 21, 期 48, 页码 17234-17238出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201503105
关键词
asymmetric synthesis; heterocycles; ligand design; Michael addition; zinc
资金
- NSFC [21432003, 91413107, 81473095, 81202400]
- National S&T Major Project of China [2012ZX09504001-003]
- Program for Chang-jiang Scholars and Innovative Research Team in University [PCSIRT: IRT1137]
- Foundation of Gansu Province [1210RIIA002, 1304FKCA084]
The asymmetric Michael reaction between 5H-oxazol-4-ones and alpha,beta-unsaturated acyl imidazoles is reported. A novel 2-benzo[b]thiophenyl-modified chiral ProPhenol species is synthesized and used as a ligand, leading to good enantioselectivities in this asymmetric conjugate addition reaction. Furthermore, the introduction of phenol additives as achiral co-ligands is found to improve the reaction's chemical yields, diastereoselectivities, and enantioselectivities.
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