Heterocycles p. 279 - 282 (1990)
Update date:2022-08-29
Topics:
Maki, Yoshifumi
Sako, Magoichi
Murase, Toshinobu
Kitade, Yukio
Hirota, Kosaku
A novel heterocyclic N-oxide, pyrimido<5,4-g>pteridine-10-oxide (1), oxygenates cyclohexene (4) and norbornene (9) under the photochemical conditions to give the corresponding oxidation products, (5) - (8) and (10) - (12), respectively.Experimental results clearly indicate that the photochemical oxygenation by (1) involves a single-electron transfer from the olefins (4) and (9) to the singlet-excited (1) followed by oxygen-atom transfer rather than oxene mechanism.
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