摘要
Photooxidation of Hantzsch 1,4-dihydropyridines (1,4-DHP,1a-1d) by direct irradiation (λ > 300 nm) under an oxygen atmosphere has been carefully examined in this work. Spectroscopic and electrochemical studies demonstrate that photoinduced singlet electron transfer from 1,4-DHP to molecular oxygen occurs. The generated superoxide radical anion (O2-·) is responsible for this typical photochemical oxidation.
Photooxidation of Hantzsch 1,4-dihydropyridines （1,4-DHP, 1a-1d） by direct irradiation （A 〉 300 nm） under an oxygen atmosphere has been carefully examined in this work. Spectroscopic and electrochemical studies demonstrate that photoinduced singlet electron transfer from 1,4-DHP to molecular oxygen occurs. The generated superoxide radical anion （O2-） is responsible for this typical photochemical oxidation.
基金
supported by the National Natural Science Foundation of China (20732007,20972171,50973125)
the Ministry of Science and Technology of China (G2007CB808004,2009CB2 20008),and the Bureau for Basic Research of the Chinese Academy of Sciences
