The Effect of 4-Hydroxyl Substituent on the Singlet Chemiexcitation Yield in Base-catalyzed Air Oxidation of 3,5-Dichlorophenylpyruvic Acids
作者:Isao Kamiya、Shizuaki Murata、Kuniaki Yamabe
DOI:10.1246/bcsj.57.1740
日期:1984.7
In base-catalyzed air oxidation of substituted phenylpyruvic acids, an excited singlet product is generated from 3,5-dichloro-4-hydroxyphenylpyruvic acid (1) but excited triplet products from 3,5-dichlorophenyl-(2) and 3,5-dichloro-4-methoxyphenylpyruvic acid (3). According to the reaction scheme proposed, the singlet chemiexcitation yield from 1 and the triplet yields from 2 and 3 are 1·2×10−4, 8.3×10−4, and 6.7×10−4, respectively. A discussion is made on the difference in spin state selectivity between 1 and 2 or 3.
在基催化的空气氧化取代的苯丙酮酸过程中,3,5-二氯-4-羟基苯丙酮酸(1)生成激发单重态产物,而3,5-二氯苯(2)和3,5-二氯-4-甲氧基苯丙酮酸(3)生成激发三重态产物。根据提出的反应机制,从1产生的单重态化学激发产率和从2和3产生的三重态产率分别为1·2×10−4、8.3×10−4和6.7×10−4。讨论了1与2或3之间自旋态选择性的差异。