Formation mechanism of monodehydro-L-ascorbic acid and superoxide anion in the autoxidation of L-ascorbic acid

被引：9
|
作者：
Miyake, N
Kim, M
Kurata, T
机构：
[1] Institute of Environmental Science of Human Life, Ochanomizu University, Tokyo, 112, Bunkyo-ku
来源：
BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY | 1997年 / 61卷 / 10期
关键词：
L-ascorbic acid; monodehydro-L-ascorbic acid; superoxide anion; autoxidation; oxygen adduct of L-ascorbic acid;
D O I：
10.1271/bbb.61.1693
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The oxidation of L-ascorbic acid (ASA) by molecular oxygen was studied in the absence of heavy metal ion catalysts, The formation of superoxide anion was confirmed during the autoxidation of ASA not only in aqueous solution but also in MeOH. The formation mechanism of superoxide anion was discussed based on both experimental and molecular orbital (MO) calculation results. It was proposed that ASA autoxidation proceeded via the C(2) oxygen adduct of ASA, and superoxide anion would be directly released from the C(2) oxygen adduct of ASA, forming monodehydro-ASA (MDASA).
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页码：1693 / 1695
页数：3
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