Abstract
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.
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Wang, D., Liu, Q., Chen, B. et al. Photooxidation of Hantzsch 1,4-dihydropyridines by molecular oxygen. Chin. Sci. Bull. 55, 2855–2858 (2010). https://doi.org/10.1007/s11434-010-3143-2
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DOI: https://doi.org/10.1007/s11434-010-3143-2