Highly enantioselective Michael addition of diethyl malonate to chalcones catalyzed by cinchona alkaloids-derivatived bifunctional tertiary amine-thioureas bearing multiple hydrogen-bonding donors
作者:Yulong Liu、Xie Wang、Xiaoyun Wang、Wei He
DOI:10.1039/c4ob00203b
日期:——
Chalcones are still challenge substrates in Michael reactions, and only limited success has been achieved. This work describes a highlyenantioselectiveMichaeladdition of diethyl malonate with chalcones catalyzed by cinchona alkaloids-derivatived bifunctional tertiary amine-thioureasbearingmultiplehydrogen-bondingdonors.