Radical-Scavenging Activity and Mechanism of Resveratrol-Oriented Analogues: Influence of the Solvent, Radical, and Substitution
作者:Ya-Jing Shang、Yi-Ping Qian、Xiao-Da Liu、Fang Dai、Xian-Ling Shang、Wen-Qiang Jia、Qiang Liu、Jian-Guo Fang、Bo Zhou
DOI:10.1021/jo9007095
日期:2009.7.17
ethanol prove that in ethyl acetate these reactions occur primarily by the HAT mechanism. The contribution of SPLET and HAT mechanism depends on the ability of the solvent to ionize ArOH and the reduction potential of the free radical involved. Furthermore, the fate of the ArOH-derived radicals, i.e., the phenoxyl radicals, was investigated by the oxidative product analysis of ArOHs and GO• in ethanol
白藜芦醇(3,5,4'-三羟基-反式-二苯乙烯,3,5,4'-THS)是众所周知的天然抗氧化剂和癌症化学预防剂,在过去的十年中引起了人们的极大兴趣。为了找到活性更高的抗氧化剂并研究以白藜芦醇为主要化合物的抗氧化机理,我们合成了3,5-二羟基-反式-二苯乙烯(3,5-DHS),4-羟基-反式-二苯乙烯(4-HS)3 ,4-二羟基-反式-苯乙烯(3,4-DHS),4,4'-二羟基-反式-苯乙烯(4,4'-DHS),4-羟基-3-甲氧基-反式-苯乙烯(3-MeO -4-HS),4-羟基-4'-甲氧基-反苯乙烯(4'-MeO-4-HS),4-羟基-4'-甲基-反苯乙烯(4'-Me-4-HS ),4-羟基-4'-硝基-反式-sti(4'-NO 2 -4-HS)和4-羟基-4'-三氟甲基-反式-sti(4'-CF 3 -4-HS)。研究了白藜芦醇及其类似物(ArOHs)的自由基清除活性及详细机理,研究