作者:Tominari Choshi、Haruto Fujioka、Yuhzo Hieda、Noriyuki Hatae、Makoto Anraku、Nobuyasu Matsuura、Kazuhide Uemura、Satoshi Hibino、Hisao Tomida、Osamu Hori
DOI:10.3987/com-15-13363
日期:——
Antioxidant activities of the simple phenolic carbazoles 5-11 were evaluated by 2,2-diphenyl-1-picrylhydrazyl and 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulfonate)(+) radical scavenging assays. The simple phenolic carbazoles 5-7, 9, and 11 exhibited stronger antioxidant activities than a-tocopherol, and similar antioxidant activities as phenolic carbazole alkaloids carazostatin (1), and carbazomadurins A (3) and B (4). Bond dissociation energies and highest occupied molecule orbital energy levels of a series of phenolic carbazoles including phenolic carbazole alkaloids were calculated. The reducing ability of the phenolic carbazole core could be important role for the antioxidant activity of carbazole alkaloids 1, 3, and 4.