61821-80-5Relevant academic research and scientific papers
Photochemical Reactions of 3-Phenyl-2H-1,4-benzoxazin-2-one and of Related Compounds in the Singlet and Triplet State
Tauer, Erich,Grellmann, Karl-Heinz
, p. 215 - 228 (2007/10/02)
Illumination of 3-phenyl-2H-1,4-benzoxazin-2-one (6) leads to the formation of 2-phenylbenzoxazole (2) and CO.From the excited singlet state of 6 other transients are formed than from its triplet state.In protic solvents in addition to 2, the Schiff base N-benzylidene-2-aminophenol (7) is formed under ring opening from the triplet state of 6.In kinetic experiments some transients emerging during the photolysis of 6 were observed and characterized.We show qualitatively that the sulfur-containing analogue to 6, phenylbenzothiazinone, reacts similar to 6 and that the corresponding phenylquinoxalinones have different properties.
Oxidation and Photochemical Reactions of 3-Phenyl-2H-1,4-Benzoxazines
Battistoni, P.,Bruni, P.,Fava, G.,Tosi, G.
, p. 451 - 455 (2007/10/02)
3-Phenyl-2H-1,4-benzoxazines 4-oxides are light sensitive compounds, irradiation leads to 3-phenyl-2H-1,4-benzoxazines and to their 3-oxidized derivatives, whenever possible.Intermediate oxaziridines are formed during the photolysis and transformed into stable nitroxide radicals.The structure of these radicals was confirmed through peracid oxidation of 3-phenyl-2H-1,4-benzoxazines and 3-phenyl-3,4-dihydro-2H-1,4-benzoxazines.A reaction mechanism is proposed on the basis of experimental observations.
