Electron-Transfer-Initiated Photoreactions of 1-Methyl-2-phenyl-1-pyrrolinium Perchlorate with α-Heteroatom-Substituted Alkanoate Anions
作者:Yoshiaki Kurauchi、Hideo Nobuhara、Kazuya Ohga
DOI:10.1246/bcsj.59.897
日期:1986.3
The irradiation of aqueous solutions of 1-methyl-2-phenyl-1-pyrrolinium perchlorate (1) in the presence of α-hydroxyalkanoate anions led to the formation of 2-(hydroxyalkyl)pyrrolidine adducts and a reduction product, 1-methyl-2-phenylpyrrolidine. Mechanistic studies demonstrated that photoaddition reactions were induced by one-electron transfers from the carboxylato groups of alkanoates to the excited
在 α-羟基链烷酸酯阴离子存在下对 1-甲基-2-苯基-1-吡咯啉高氯酸盐 (1) 的水溶液进行辐照,导致形成 2-(羟烷基)吡咯烷加合物和还原产物 1-甲基- 2-苯基吡咯烷。机理研究表明,光加成反应是通过从链烷酸酯的羧基基团到激发单线态 1 (1S1) 的单电子转移引起的,然后是有效的脱羧。此外,发现 1 与乙氧基乙酸盐的光反应优先于还原产物生成 2-(乙氧基甲基)吡咯烷加合物。对于与 2-巯基丙酸酯和 α-氨基酸的光反应,检测到还原产物。N-乙酰甘氨酸盐以相当高的产率(80%)得到2-(乙酰氨基甲基)吡咯烷加合物。