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The fungicidal activity of substituted 1 4 naphtho quinones 2. alkoxy phenoxy and acyloxy derivatives

, : The fungicidal activity of substituted 1 4 naphtho quinones 2. alkoxy phenoxy and acyloxy derivatives. Pesticide Science 15(3): 235-240

A representative group of 1,4-naphthoquinone derivatives, bearing alkoxy, phenoxy and acyloxy substituents in the 2-position, was synthesized and assayed against Botrytis cinerea, Cladosporium fulvum and Venturia inaequalis. The alkoxy compounds exhibited moderate activity, which was enhanced by the presence of a 3-chloro and, to a lesser extent, a 3-bromo substituent. 2-Chloro-3-phenoxy derivatives were highly active, but diphenoxy compounds were inactive. Acyloxy derivatives possessed only weak activity unless a halogen atom was present in the 3-position; benzoyloxy compounds, however, were generally poor fungicides.

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