D. Alekperov, E. Fasani, A. Amer
1994
Citations
0
Influential Citations
2
Citations
Journal
Heterocycles
Abstract
2-Methoxy and 2-nitrophenazine 10-oxide are deoxygenated by irradiation in the presence of triethylamine, 2,3-dimethyl-2-butene and triethylphosphite via electron transfer to the singlet excited state, as shown by the comparison of reaction quantum yield and fluorescence quenching. 1,4-Dimethoxybenzene quenches the singlet, but causes no deoxygenation. The same mechanism operates in the photoreduction of benzo[c]cinnoline 5-oxide, but it is too slow to compete efficiently with the rearrangement in the case of quinoline 1-oxide. The photo-deoxygenation of the boron trifluoride ground state complexes of these substrate is in every case unefficient