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AssigneeCentral Glass Company, Limited
InventorsTetsuo Takematsu, Takashi Kume, Takeo Komata, Kiyoshi Suzuki, Matsue Minezaki, Yumiko Shirakawa, Kaoru Mori
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The invention provides N-acyl-N-phenyltetrahydrophthalamic acid derivatives represented by the general formula [I], methods of producing the same, and herbicides containing the same as the effective components, ##STR1## wherein X and Y each individually represent hydrogen atoms or halogen atoms, R.sup.1 represents a hydrogen atom, a halogen atom, a lower alkoxy group, a lower alkenyloxy group, a lower alkynyloxy group, a lower alkoxyalkoxy group or a lower alkoxycarbonylalkoxy group, R.sup.2 represents a lower alkyl group, a halogenated lower alkyl group, or a substituted or unsubstituted phenyl group, and R.sup.3 represents a lower alkoxy group, a lower alkenyloxy group, a lower alkynyloxy group, a lower alkoxyalkoxy group, a benzyloxy group or a lower alkoxycarbonylalkoxy group. The herbicides which are very useful can be widely applied to upland, paddy field, orchard, turf, forest, non-crop land, etc, and are not harmful to crops.
N-acyl-N-phenyltetrahydrophthalamic acid derivatives represented by the general formula (I), ##STR16## wherein X and Y each individually represent hydrogen atoms or halogen atoms, R.sup.1 represents a hydrogen atom, a halogen atom, a lower alkoxyl group, a lower alkenyloxy group, a lower alkynyloxy group, a lower alkoxyalkoxy group or a lower alkoxycarbonylalkoxy group, R.sup.2 represents a lower alkyl group, a halogenated lower alkyl group, or a substituted or unsubstituted phenyl group, and R.sup.3 represents a lower alkoxy group, a lower alkenyloxy group, a lower alkynyloxy group, a lower alkoxyalkoxy group, benzyloxy group or a lower alkoxycarbonylalkoxy group.
Method of producing N-acyl-N-phenyltetrahydrophthalamic acid derivatives which are represented by the general formula [I], as defined above, by the reaction of imidoylchloride derivatives represented by the general formula [II], in the presence of a base, with a carboxylic acid represented by the general formula [III], ##STR17## wherein X, Y, R.sup.1, R.sup.2 and R.sup.3 are as defined hereinabove.
Method of producing N-acyl-N-phenyltetrahydrophthalamic acid derivatives which are represented by the general formula [I], as defined above, by the reaction of imidoylchloride which is represented by the general formula [II] with an alkali metal salt of carboxylic acid which is represented by the general formula [IV], ##STR18## wherein X, Y, R.sup.1 R.sup.2 and R.sup.3 are as defined hereinabove, and M is an alkali metal.
A herbicide comprising, as effective components, N-acyl-N-phenyltetrahydrophthalamic acid derivatives which are represented by the general formula [I], ##STR19## wherein X, Y, R.sup.1, R.sup.2 and R.sup.3 are as defined hereinabove.
Method of producing N-acyl-N-phenyltetrahydrophthalamic acid derivatives represented by the general formula (I), as defined above, the method comprising the following steps in sequence:
Dependencies are inferred from the claim text.