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When the phytyl group at the C2 position in alpha-tocopherol was replaced by methyl group, no significant change was observed [k = 3.2 x 10(3) M(-1) s(-1)].  On the other hand, a carboxyl group at the C2 position significantly retarded the GO-scavenging rate [k = 4.9 x 10(2) M(-1) s(-1)].  Among the 6-chromanol derivatives, 8-amino-2,2-dimethylchroman-6-ol showed the highest GO-scavenging activity [k = 1.4 x 10(4) M(-1) s(-1)].  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  1. 学会発表・講演等
  2. ポスター発表

Radical-Scavenging Activity of 6-Chromanol Derivatives with Various Substituents

https://repo.qst.go.jp/records/70639
https://repo.qst.go.jp/records/70639
4a6085b9-d105-42fe-b08c-e685fa15d1ce
Item type 会議発表用資料 / Presentation(1)
公開日 2011-11-24
タイトル
タイトル Radical-Scavenging Activity of 6-Chromanol Derivatives with Various Substituents
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_c94f
資源タイプ conference object
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 Nakanishi, Ikuo

× Nakanishi, Ikuo

WEKO 693841

Nakanishi, Ikuo

Search repository
Inami, Keiko

× Inami, Keiko

WEKO 693842

Inami, Keiko

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Ohkubo, Kei

× Ohkubo, Kei

WEKO 693843

Ohkubo, Kei

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Kawashima, Tomonori

× Kawashima, Tomonori

WEKO 693844

Kawashima, Tomonori

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Fukuhara, Kiyoshi

× Fukuhara, Kiyoshi

WEKO 693845

Fukuhara, Kiyoshi

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Fukuzumi, Shunichi

× Fukuzumi, Shunichi

WEKO 693846

Fukuzumi, Shunichi

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Anzai, Kazunori

× Anzai, Kazunori

WEKO 693847

Anzai, Kazunori

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Ozawa, Toshihiko

× Ozawa, Toshihiko

WEKO 693848

Ozawa, Toshihiko

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Mochizuki, Masataka

× Mochizuki, Masataka

WEKO 693849

Mochizuki, Masataka

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Matsumoto, Kenichiro

× Matsumoto, Kenichiro

WEKO 693850

Matsumoto, Kenichiro

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中西 郁夫

× 中西 郁夫

WEKO 693851

en 中西 郁夫

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川島 知憲

× 川島 知憲

WEKO 693852

en 川島 知憲

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松本 謙一郎

× 松本 謙一郎

WEKO 693853

en 松本 謙一郎

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抄録
内容記述タイプ Abstract
内容記述 The radical-scavenging rates of alpha-tocopherol and 6-chromanol derivatives with various substituents were examined in order to develop effective radioprotectors. alpha-Tocopherol efficiently scavenged galvinoxyl radical (GO) with the second-order rate constant (k) of 3.3 x 10(3) M(-1) s(-1) in deaerated acetonitrile at 25 degrees C. When the phytyl group at the C2 position in alpha-tocopherol was replaced by methyl group, no significant change was observed [k = 3.2 x 10(3) M(-1) s(-1)]. On the other hand, a carboxyl group at the C2 position significantly retarded the GO-scavenging rate [k = 4.9 x 10(2) M(-1) s(-1)]. Among the 6-chromanol derivatives, 8-amino-2,2-dimethylchroman-6-ol showed the highest GO-scavenging activity [k = 1.4 x 10(4) M(-1) s(-1)]. The smaller the calculated ionization potential by the density functional theory is, the stronger the GO-scavenging activity becomes.
会議概要(会議名, 開催地, 会期, 主催者等)
内容記述タイプ Other
内容記述 18th Annual Meeting of the Society for Free Radical Biology and Medicine (SFRBM 2011)
発表年月日
日付 2011-11-20
日付タイプ Issued
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