This thesis is concerned in principle with the photooxygenation reaction of some 2-cyclohexenone-6-carboxylate derivatives: 3,5-diphenyl, 3-(4`-methoxyphenyl)-5-phenyl, -(4`-chlorophenyl)-5-phenyl (6), 3-Methyl-5-phenyl , 3-styryl-5-phenyl, 3-phenyl-5- styryl. In addition to, Photo-binding of cyclohexenone derivative with 6-amino-1,3-dimethyluracil and photodegradation of ATP using the photooxygenated product formed.