Asymmetric synthesis of warfarin and its analogs catalyzed by <i>C</i><sub>2</sub>-symmetric squaramide-based primary diamines
作者:Sergei V. Kochetkov、Alexander S. Kucherenko、Sergei G. Zlotin
DOI:10.1039/c8ob01576g
日期:——
4-hydroxy-6-methyl-2H-pyran-2-one to α,β-unsaturated ketones. Both enantiomers of the anticoagulant warfarin and itsanalogs were prepared in up to 96% yield and with 96% ee. Recyclability of the developed catalysts and synthetic utility of the prepared Michael adducts for asymmetric synthesis of potential chiral medications via acylation reactions were demonstrated.