Studies on the Preparation of Bioactive Lignans by Oxidative Coupling Reaction. VI. Oxidation of Methyl (E)-3-(4,5-Dihydroxy-2-methoxyphenyl)-2-butenoate and Lipid Peroxidation-Inhibitory Effects of the Produced Caffeoquinone.
Studies on the Preparation of Bioactive Lignans by Oxidative Coupling Reaction. VI. Oxidation of Methyl (E)-3-(4,5-Dihydroxy-2-methoxyphenyl)-2-butenoate and Lipid Peroxidation-Inhibitory Effects of the Produced Caffeoquinone.
Studies on the Preparation of Bioactive Lignans by Oxidative Coupling Reaction. VI. Oxidation of Methyl (E)-3-(4,5-Dihydroxy-2-methoxyphenyl)-2-butenoate and Lipid Peroxidation-Inhibitory Effects of the Produced Caffeoquinone.
作者:Shirou MAEDA、Hiroshi MASUDA、Takashi TOKOROYAMA
DOI:10.1248/cpb.43.1588
日期:——
Oxidation of hydrody-α-methylcinnamate 5 derived from 4-methylesculetin afforded the α-methylcaffeoquinone derivative 7 without formation of the oxidative coupling product. The reaction of the α-methylferulate derivative 13 afforded a complex mixture of products. Thus, the hydroxy-α-methylcinnamates seem not to be suitable substrates for oxidative coupling.Compound 7 was tested for inhibitory effect on lipid peroxidation. It showed more potent activity than idebenone in rat brain homogenate, and was much more potent than (±)-α-tocopherol in rat liver microsomes.