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FUNGICIDES AND PHOTOCHEMISTRY PHOTODEGRADATION OF THE DICARBOXIMIDE FUNGICIDE PROCYMIDONE
Schwack, W.,Bourgeois, B.,Walker, F.
, p. 4033 - 4040 (1995)
The photoreactivity of the dicarboxamide fungicide procymidone (1) (3-(3,5-dichlorophenyl)-1,5-dimethyl-3-azabicyclohexane-2,4-dione) on plant surfaces was studies by irradiation experiments in different organic solvents simulating the plant cuticule environment. Photodegradation (λ > 280 nm) increased in the order isopropanol, cyclohexane, cyclohexene. In the presence of isopropanol or cyclohexane, mainly photodegalogenation reactions were observed, which, to a minor extent, completed with substitutions by solvent molecules. In the presence of cyclohexene, however, substitution of a phenyl-Cl by the solvent was strongly preferred and the monodehalogenated procymidone was only found in low percentages. - Keywords: Dicarboximide fungicides; procymidone; photochemistry; photoproducts
