@inproceedings{oai:repo.qst.go.jp:00054214, author = {Nakanishi, Ikuo and Yakumaru, Haruko and Nyuui, Minako and Ohkubo, Kei and Matsumoto, Kenichiro and Fukuhara, Kiyoshi and Okuda, Haruhiro and Fukuzumi, Shunichi and Ozawa, Toshihiko and Anzai, Kazunori and Ikota, Nobuo and 中西 郁夫 and 薬丸 晴子 and 乳井 美奈子 and 松本 謙一郎}, book = {The FASEB Journal}, issue = {Meeting Abstracts}, month = {Apr}, note = {In order to develop effective radioprotectors, we recently synthesized three vitamin E derivatives bearing a pyridine moiety with a linkage of different spacers. All the vitamin E derivatives efficiently scavenged 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical in deaerated methanol at 298 K. The second-order rate constant for DPPH radial-scavenging by one of the vitamin E derivatives determined by the stopped-flow technique is about 3-fold larger than that by 2,2,5,7,8-pentamethylchroman-6-ol, a vitamin E model. This suggests that the pyridine moiety may accelerate the reaction by stabilizing the radical cation generated in the electron transfer from the vitamin E derivative to DPPH radical.}, pages = {lb199--lb199}, title = {Intramolecular Base-Catalysis in the Radical-Scavenging Reaction by Vitamin E Derivatives Bearing a Pyridine Moiety}, volume = {24}, year = {2010} }