Rh. Prager et Ja. Smith, THE CHEMISTRY OF 5-OXODIHYDROISOXAZOLES .11. THE PHOTOLYSIS OF 3-HYDROXY-4-PHENYLISOXAZOL-5(2H)-ONES (PHENYLDISIC ACIDS), Australian Journal of Chemistry, 48(2), 1995, pp. 217-226
3-Hydroxy-2-methyl-4-phenylisoxazol-5(2H)-one, 3-hydroxy-2, 4-diphenyl
isoxazol-5(2H)-one and phenyldisic acid have been photolysed at 254 nm
in hydroxylic solvents. By comparison of the respective products with
those obtained from 3-methoxy-4-phenylisoxazol-5(2H)-one, 5-methoxy-4
-phenylisoxazol-3(2H)-one and y-2,2-dimethyl-3(5)-oxo-4-phenyldihydroi
soxazolium hydroxide, it is apparent that the disic acids photolyse in
dependently from the 3-hydroxy 5-one, the 5-hydroxy 3-one and the zwit
terion tautomers. Novel photochemical pathways for these processes are
suggested.