手性铜( II )络合物催化丙二酸酯对β,γ-不饱和-α-酮酯的对映选择性迈克尔加成反应,实现了高产率(高达96%)和高ee(高达92%) 。手性配体同时利用了联萘基和脯氨酸部分,并且可以容忍具有不同电子和空间特征的取代基。反应可以在温和的条件下进行,并且可以在不损失产率和对映选择性的情况下实现克级反应。
Highly enantioselective Michael addition of malonates to β,γ-unsaturated α-ketoesters catalyzed by chiral N,N′-dioxide-Yttrium(iii) complexes with convenient procedure
HighlyenantioselectiveMichaeladdition of malonates to beta,gamma-unsaturated alpha-ketoesters has been promoted by chiral N,N'-dioxide-Yttrium(iii) complexes, providing the corresponding products in excellent yields with 94-99% ee values.