Studies on the Phenylphenol Derivatives with Biological Activity |
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Authors: | Hong-Ming Cheng Morifusa Eto Shozo Kuwatsuka Yasuyoshi Oshima |
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Affiliation: | Department of Agricultural Chemistry, Kyushu University, Fukuoka |
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Abstract: | A number of compounds structurally related to phenylphenols were systematically synthesized as herbicides. Some of nitro-substituted derivatives show strong activity in pre-emergence test. The herbicidai activity of this series appears to relate with the pK-value of the compound.Herbicidai activities of chloro-substituted phenylphenols were investigated. The derivatives of o-phenylpbenol and p-phenylphenol exhibited different selective toxicity between radish and rice, the latter appeared to have a specific inhibitory activity against the root growth of rice. As an attempt to analyze the correlation of herbicidai activity and chemical structure, the dissociation constant and the substituent constant π were applied in this investigation. The herbicidai activity correlated linearly with pK-value. |
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