Fungicidal activities of alpha-methoxyphenylacetic acid derivatives
2002
Ichiba, T. (Shionogi and Co. Ltd., Koka, Shiga (Japan). Aburahi Lab.) | Murashi, T. | Ohtsuka, T. | Masuko, M.
A number of ¿-alkoxyphenylacetic acid derivatives were synthesized and their fungicidal activities were examined. Studies of structure-activity relationships revealed strong fungicidal activity when the substituent at the alpha-position was a methoxy group and a substituted phenoxymethyl group was introduced to the 2-position of the benzene ring of the phenylacetic acid moiety. When a substituted phenoxy group was introduced to this position, the fungicidal activity was very weak. It was also shown that N-methyl-phenylacetamide derivatives had stronger activities than phenylacetic acid methyl lester derivatives. Among the compounds synthesized in this study, 2-m2-(2, 5-dimethylphenoxymethyl)phenyln-2-methyl-N-methylacetamide (35) showed the most potent fungicidal activity against a wide range of crop diseases.
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