Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 84, Issue 11, Pages 7362-7371Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.9b01036
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Funding
- Toyo Gosei Memorial Foundation
- Meiji Seika Pharma Award in Synthetic Organic Chemistry, Japan
- Leading Research Promotion Program 'Soft Molecular Activation' of Chiba University, Japan
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The efficient chemo- and regioselective catalytic asymmetric syntheses of enamides, which are important core structures of bioactive natural products, have been achieved through the first umpolung organocascade reaction of alpha-imino amides. A variety of enamides have been synthesized enantioselectively in high yields with up to 99% ee. Notably, both enantiomers of the products can be selectively prepared by the simple pretreatment of the substrate. Mechanistic studies reveal that E/Z-geometry information from the substrate is transferred to the product. The present method can be applied to a wide range of alpha-imino amides, irrespective of the electronic nature of the substituents.
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