Catalytic asymmetric Michael addition with curcumin derivative
作者:Wenjun Li、Wenbin Wu、Feng Yu、Huicai Huang、Xinmiao Liang、Jinxing Ye
DOI:10.1039/c0ob00757a
日期:——
Catalytic asymmetric Michael additions with curcumin derivatives were achieved by a new series of tertiary amine–thiourea organocatalysts to afford the Michael adducts in high yields and excellent enantioselectivities.
determined by spectroscopic and mass spectrometry analyses. The free radical scavenging ability of these synthetic asymmetric curcuminoids was evaluated and compared to that of the positive control butylated hydroxytoluene (BHT). Among the synthesized asymmetric curcuminoids, compounds 9a (IC50 = 37.57 ± 0.89 μM) and 9e (IC50 = 37.17 ± 1.76 μM) possessed effective 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical