Highly enantioselective synthesis of Warfarin and its analogs catalysed by primary amine–phosphinamide bifunctional catalysts
作者:Juan Dong、Da-Ming Du
DOI:10.1039/c2ob26334c
日期:——
An efficient enantioselective Michael addition of 4-hydroxycoumarin to α,β-unsaturated ketones catalysed by primary amine–phosphinamide bifunctionalcatalysts has been developed. This reaction afforded Warfarin and its analogs in moderate to excellent yields (up to 99%) and good to excellent enantioselectivities (up to 99% ee).