Reversible 1,4-cycloaddition of singlet oxygen to N-substituted 2-pyridones: 1,4-endoperoxide as a versatile chemical source of singlet oxygen.
N-substituted pyridones (1) easily undergo singlet oxygenation to give exclusively the corresponding endoperoxides (2), which decompose to give pyridones again while liberating 1O2 in high yield.
Matsumoto
Masakatsu
M
Department of Materials Science, Kanagawa University, Hiratsuka, Kanagawa, 259-1293, Japan. matsumo-chem@kanagawa-u.ac.jp
Yamada
Masayo
M
Watanabe
Nobuko
N