The present invention relates to nitro-vinyl-pyrazole compounds of formula (B)

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wherein ring A, R.sup.B2 and R.sup.B3 are as defined in claim 1, as well as the manufacture of such compounds and their subsequent use in the production of agrochemicals and/or pharmaceuticals.

The present invention relates to nitro-vinyl-pyrazole compounds of formula (B)

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wherein ring A, R.sup.B2 and R.sup.B3 are as defined in claim 1, as well as the manufacture of such compounds and their subsequent use in the production of agrochemicals and/or pharmaceuticals.

The present invention provides, inter alia, a process for producing a compound of formula (I) wherein the substituents are as defined in claim 1, comprising reacting a compound of formula (II) in a suitable reaction medium comprising a desulfurization agent formula (II). The present invention further provides intermediate compounds utilised in said process, and methods for producing said intermediate compounds.

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The present invention relates to esters of carboxylic acid agrochemicals comprising a labile protecting group and having formula (I). Certain of the esters of carboxylic acid agrochemicals do not undergo hydrolysis to a significant degree in the dark, but are cleaved to regenerate the parent carboxylic acid agrochemical when exposed to light. Others of the esters of carboxylic acid agrochemicals undergo hydrolysis under both light and dark conditions. The present invention further relates to methods for the controlled release of a carboxylic acid agrochemicals, and to methods of controlling unwanted plants comprising applying to the unwanted plants an ester of a carboxylic acid agrochemical.

The present invention relates to esters of carboxylic acid agrochemicals comprising a labile protecting group and having formula (I). Certain of the esters of carboxylic acid agrochemicals do not undergo hydrolysis to a significant degree in the dark, but are cleaved to regenerate the parent carboxylic acid agrochemical when exposed to light. Others of the esters of carboxylic acid agrochemicals undergo hydrolysis under both light and dark conditions. The present invention further relates to methods for the controlled release of a carboxylic acid agrochemicals, and to methods of controlling unwanted plants comprising applying to the unwanted plants an ester of a carboxylic acid agrochemical.

A compound represented by formula (I) or formula (II) has a pest control effect. (In the formulae, Q.sup.1 represents a pyrazine ring or the like; G.sup.1 represents a nitrogen atom or a carbon atom; X.sup.1 represents an alkyl group or the like; m represents the number of X.sup.1 moieties; A represents an oxygen atom or the like; Y represents a single bond or the like; Q.sup.2 represents a benzene ring or the like; X.sup.2 represents an alkyl group, an aryl group or the like; X.sup.3 represents a halogeno group or the like; n represents the number of X.sup.3 moieties; Z.sup.q- represents a counter ion; and q represents 1 or 2.)

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A compound represented by formula (I) or formula (II) has a pest control effect. (In the formulae, Q.sup.1 represents a pyrazine ring or the like; G.sup.1 represents a nitrogen atom or a carbon atom; X.sup.1 represents an alkyl group or the like; m represents the number of X.sup.1 moieties; A represents an oxygen atom or the like; Y represents a single bond or the like; Q.sup.2 represents a benzene ring or the like; X.sup.2 represents an alkyl group, an aryl group or the like; X.sup.3 represents a halogeno group or the like; n represents the number of X.sup.3 moieties; Z.sup.q- represents a counter ion; and q represents 1 or 2.)

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The invention belongs to the technical field of agricultural chemicals, and in particular relates to a pyridazinol compound represented by the Formula I, a derivative, preparation method, herbicidal composition and use thereof. The compound, derivative and herbicidal composition thereof have very high herbicidal activity and selectivity, and are safe for crops,

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The invention belongs to the technical field of agricultural chemicals, and in particular relates to a pyridazinol compound represented by the Formula I, a derivative, preparation method, herbicidal composition and use thereof. The compound, derivative and herbicidal composition thereof have very high herbicidal activity and selectivity, and are safe for crops,

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The invention belongs to the technical field of agricultural chemicals, and in particular relates to a pyridazinol compound represented by the Formula I, a derivative, preparation method, herbicidal composition and use thereof. The compound, derivative and herbicidal composition thereof have very high herbicidal activity and selectivity, and are safe for crops,

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