Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
  • C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
  • C07D307/78—Benzo [b] furans; Hydrogenated benzo [b] furans
  • C07D307/79—Benzo [b] furans; Hydrogenated benzo [b] furans with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the hetero ring
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
  • A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
  • A01N43/04—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom
  • A01N43/06—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom five-membered rings
  • A01N43/12—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom five-membered rings condensed with a carbocyclic ring
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
  • A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
  • A01N43/24—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with two or more hetero atoms
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
  • A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
  • A01N43/24—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with two or more hetero atoms
  • A01N43/26—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with two or more hetero atoms five-membered rings
  • A01N43/28—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with two or more hetero atoms five-membered rings with two hetero atoms in positions 1,3
  • A01N43/30—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with two or more hetero atoms five-membered rings with two hetero atoms in positions 1,3 with two oxygen atoms in positions 1,3, condensed with a carbocyclic ring
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
  • A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
  • A01N43/24—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with two or more hetero atoms
  • A01N43/32—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with two or more hetero atoms six-membered rings
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D317/00—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms
  • C07D317/08—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3
  • C07D317/44—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems
  • C07D317/46—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems condensed with one six-membered ring
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D317/00—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms
  • C07D317/08—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3
  • C07D317/44—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems
  • C07D317/46—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems condensed with one six-membered ring
  • C07D317/48—Methylenedioxybenzenes or hydrogenated methylenedioxybenzenes, unsubstituted on the hetero ring
  • C07D317/50—Methylenedioxybenzenes or hydrogenated methylenedioxybenzenes, unsubstituted on the hetero ring with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to atoms of the carbocyclic ring
  • C07D317/58—Radicals substituted by nitrogen atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D319/00—Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
  • C07D319/04—1,3-Dioxanes; Hydrogenated 1,3-dioxanes
  • C07D319/08—1,3-Dioxanes; Hydrogenated 1,3-dioxanes condensed with carbocyclic rings or ring systems
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D319/00—Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
  • C07D319/10—1,4-Dioxanes; Hydrogenated 1,4-dioxanes
  • C07D319/14—1,4-Dioxanes; Hydrogenated 1,4-dioxanes condensed with carbocyclic rings or ring systems
  • C07D319/16—1,4-Dioxanes; Hydrogenated 1,4-dioxanes condensed with carbocyclic rings or ring systems condensed with one six-membered ring
  • C07D319/18—Ethylenedioxybenzenes, not substituted on the hetero ring
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D319/00—Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
  • C07D319/10—1,4-Dioxanes; Hydrogenated 1,4-dioxanes
  • C07D319/14—1,4-Dioxanes; Hydrogenated 1,4-dioxanes condensed with carbocyclic rings or ring systems
  • C07D319/16—1,4-Dioxanes; Hydrogenated 1,4-dioxanes condensed with carbocyclic rings or ring systems condensed with one six-membered ring
  • C07D319/20—1,4-Dioxanes; Hydrogenated 1,4-dioxanes condensed with carbocyclic rings or ring systems condensed with one six-membered ring with substituents attached to the hetero ring
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D321/00—Heterocyclic compounds containing rings having two oxygen atoms as the only ring hetero atoms, not provided for by groups C07D317/00 - C07D319/00
  • C07D321/02—Seven-membered rings
  • C07D321/10—Seven-membered rings condensed with carbocyclic rings or ring systems

Definitions

• the present invention relates to oxime ethers of the general formula I in the form of racemic mixtures thereof or isomers thereof
• R 1 is hydrogen, C 1-4 alkyl, C 1- 3 alkoxymethyl, methylthio, cyano, cyclopropyl or trifluoromethyl,
• R is hydrogen and/or C 1-3 alkyl, with the proviso that X is one of the groups
• R 1 is methyl and R 2 and R 3 together are methylenedioxy.
• the compounds according to the invention have fungicidal properties and are suitable as fungicidal active ingredients, especially for use in agriculture and horticulture.
• the invention relates also to a process for the preparation of the compounds according to the invention, to fungicidal compositions comprising such compounds as active ingredients, and to the use of such compounds and compositions for controlling phytopathogenic fungi in agriculture and horticulture.
• alkyl or alkoxy groups are, depending on the number of carbon atoms, straight-chained or branched.
• Substituents of the oxygen-containing ring are, for example, C 1- 4 alkyl, C 1- 4 alkoxy and fluorine; there may be several such substituents which may be identical or different.
• Oxime ethers in which the five- to seven-membered ring formed by R 2 and R 3 is mono- or poly-substituted by C 1 -C 4 alkyl, C 1 -C 4 alkoxy and/or by fluorine are therefore preferred. (Sub-group IA).
• asymmetric carbon atoms are present in the compounds of formula I, the compounds occur in optically active form.
• the compounds in any case occur in the [E] or the [Z] form simply as a result of the presence of the aliphatic and the imino double bond.
• atropic isomerism may occur.
• Formula I is to include all those possible isomeric forms and mixtures thereof, for example racemic mixtures and any [E/Z] mixtures.
• the process according to the invention for the preparation of the compounds according to the invention comprises reacting an oxime of the general formula ⁇
• U is a leaving group.
• This reaction is a nucleophilic substitution which can be carried out under reaction conditions that are customary in this respect.
• the leaving group U present in the benzyl alcohol derivative of formula III is preferably to be understood as being chlorine, bromine, iodine, methanesulfonyloxy, benzenesulfonyloxy or p-toluenesulfonyloxy.
• the reaction is advantageously carried out in a basic medium in an inert organic diluent which may be, especially, aliphatic and aromatic, unsubstituted or halogenated hydrocarbons, such as pentane, hexane, heptane, cyclohexane, petroleum ether, petroleum, ligroin, benzene, toluene, methylene chloride, ethylene chloride, chloroform, carbon tetrachloride, chlorobenzene, o-dichlorobenzene, also ethers, such as diethyl and dibutyl ether, glycol dimethyl ether and diglycol dimethyl ether, tetrahydrofuran and dioxane, also ketones, such as acetone, methyl ethyl ketone, methyl isopropyl ketone and methyl isobutyl ketone, also nitriles, such as, for example, acetonitrile and
• bases hydroxides, hydrogen carbonates, carbonates and alcoholates of alkali and alkaline earth metals (Li, Na, K, Ca, Mg), sodium hydride, tertiary amines, such as trimethylamine and triethylamine, pyridine, picolines, N-methylmorpholine, N-ethylpyrrolidine, diazabicyclo[4,3,0]undecane (DBU), 1,4-diazabicyclo2,2,2-octane (DABCO), diazabicyclo[3,2,0]nonane (DBN), and organolithium
• silver oxide can be used as a catalytically active weak base.
• the reaction temperature is advantageously in the range of from -20°C to +80°C, preferably from 0°C to +60°C.
• reaction can be carried out with phase transfer catalysis in an organic solvent, such as, for example, methylene chloride, in the presence of an aqueous basic solution, for example sodium hydroxide solution, and a phase transfer catalyst, such as, for example, tetrabutylammonium hydrogen sulfate, at room temperature.
• organic solvent such as, for example, methylene chloride
• a phase transfer catalyst such as, for example, tetrabutylammonium hydrogen sulfate
• a base for example sodium or potassium hydroxide or pyridine.
• Other methods can be found in Houben-Weyl, "Methoden der Organischen Chemie", Vol. X/ 4, pages 3-308 (1968) ("Herrie und Umwandlung von Oximen" (Preparation and conversion of oximes)).
• the present invention relates likewise to those compounds of formula H that are novel.
• the starting materials of formula m can also be prepared in a manner known per se, for example as described in European Patent Publication No. 203 606 and in the literature cited therein.
• An important group of compounds within formula I or the above-mentioned sub-group IA comprises those oxime ethers in which R 2 and R 3 together are a methylenedioxy or ethylenedioxy bridge bonded by way of oxygen to the phenyl ring, which bridge may be mono- or poly-substituted by methyl, methoxy and/or by fluorine, while R 1 , X and R are as defined. (Sub-group IB).
• preferred compounds are those in which X is a single bond or one of the groups -C(R) 2 -, -CO-, CR 2 O and CR 2 CR 2 , and especially those in which R 1 is methyl, isopropyl, methoxymethyl, cyclopropyl or CF 3 .
• Another important group of compounds comprises oxime ethers of formula I or IA in which R 2 and R 3 together with the two carbon atoms to which they are bonded form a five-membered ring comprising one oxygen atom or a seven-membered ring comprising two oxygen atoms, which rings are unsubstituted or mono- or poly-substituted by methyl, methoxy and/or by fluorine, while R 1 , X and R are as defined. (Sub-group IC.)
• the compounds according to the invention have fungicidal action and can accordingly be used to control or prevent fungus infestation in agriculture, in horticulture and in wood protection. They are especially suitable for inhibiting the growth of or for destroying phytopathogenic fungi on parts of plants, for example leaves, stems, roots, tubers, fruit or blossom, and on seed, as well as noxious fungi occurring in the soil.
• the compounds according to the invention can also be used to control fungi that cause wood to decompose or to become discoloured.
• the compounds according to the invention are effective, for example, in the control of fungi of the classes Deuteromycetes, Ascomycetes, Basidiomycetes and Phycomycetes.
• the compounds according to the invention are especially suitable for controlling the following pathogens:
• True mildew fungi for example Erysiphe graminis, Erysiphe cichoracearum, Podosphaera leucotricha, Uncinula necator, Sphaerotheca spp.
• Rust fungi for example Puccinia tritici, Puccinia recondita, Puccinia hordei, Puccinia coronata, Puccinia striiformis, Puccinia arachidis, Hemileia vastatrix, Uromyces fabae
• Scab fungi for example Venturia inaequalis
• Cercospora spp. for example Cercospora arachidicola, Cercospora beticola
• Mycosphaerella spp. for example Mycosphaerella fijiensis
• Alternaria spp. for example Alternaria brassicae, Alternaria mali
• Septoria spp. for example Septoria nodorum
• Helminthosporium spp. for example Helminthosporium teres, Helminthosporium oryzea
• Plasmopara spp. for example Plasmopara viticola
• Pseudoperonospora spp. for example Pseudoperonospora cubensis
• Phytophthora spp. for example Phytophthora infestans
• Pseudocercosporella spp. for example Pseudocercosporella herpotrichoides
• Piricularia spp. for example Piricularia oryzae
• the compounds are also effective against, for example, fungi of the genera Tilletia, Ustilago, Rhizoctonia, Verticillium, Fusarium, Pythium, Gaeumannomyces, Sclerotinia, Monilia, Botrytis, Peronospora, Bremia, Gloeosporium, Cercosporidium, Penicillium, Ceratocystis, Rhynchosporium, Pyrenophora, Diaporthe, Ramularia and Leptosphaeria.
• Certain representatives of the compounds according to the invention are also effective against wood-destructive fungi, such as, for example, of the genera Coniophora, Gloeophyllum, Poria, Merulius, Trametes, Aureobasidium, Sclerophoma and Trichoderma.
• the compounds according to the invention are distinguished by a prophylactic and curative action, but especially by a marked systemic action.
• the compounds according to the invention are effective against phytopathogenic fungi under greenhouse conditions at concentrations as low as from 0.5 mg to 500 mg of active ingredient per litre of spray mixture. Under field conditions it is advantageous to use concentrations of from 20 g to 1 kg of compound of formula I per hectare and treatment. In order to control seed-borne and soil-borne fungi by the seed-dressing process, it is advantageous to use concentrations of from 0.001 g to 1.0 g of compound of formula I per kg of seed.
• compositions for example solutions, suspensions, emulsions, emulsif ⁇ able concentrates and pulverulent preparations.
• the fungicidal compositions according to the invention comprise an effective amount of at least one compound of the general formula I, as defined above, and formulation auxiliaries.
• the compositions advantageously comprise at least one of the following formulation auxiliaries:
• Solid carriers Solid carriers; solvents or dispersion agents; surfactants (wetting agents and emulsifiers); dispersion agents (without surfactant action); and stabilisers.
• Suitable solid carriers are essentially: natural mineral substances, such as kaolin, argillaceous earths, kieselguhr, talcum, bentonite, chalk, for example prepared chalk, magnesium carbonate, limestone, quartz, dolomite, attapulgite, montmorillonite and diatomaceous earth; synthetic mineral substances, such as highly dispersed silicic acid, aluminium oxide and silicates; organic substances, such as cellulose, starch, urea and synthetic resins; and fertilisers, such as phosphates and nitrates, it being possible for such carriers to be present, for example, in the form of granules or powders.
• natural mineral substances such as kaolin, argillaceous earths, kieselguhr, talcum, bentonite, chalk, for example prepared chalk, magnesium carbonate, limestone, quartz, dolomite, attapulgite, montmorillonite and diatomaceous earth
• synthetic mineral substances such as highly dispersed silicic acid, aluminium
• Suitable solvents and dispersion agents are essentially: aromatic compounds, such as toluene, xylenes, benzene and alkylnaphthalenes; chlorinated aromatic compounds and chlorinated aliphatic hydrocarbons, such as chlorobenzenes, chloroethylenes and methylene chloride; aliphatic hydrocarbons, such as cyclohexane and paraffins, for example crude oil fractions; alcohols, such as butanol and glycol, as well as the ethers and esters thereof; ketones, such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone; and strongly polar solvents and dispersion agents, such as dimethylformamide, N-methylpyrrolidone and dimethyl sulfoxide, such solvents and dispersion agents preferably having flash points of at least 30°C and boiling points of at least 50°C, and water.
• aromatic compounds such as toluene
• Suitable solvents and dispersion agents are so-called liquefied gaseous extenders or carriers, which are products that are gaseous at room temperature and under normal pressure. Examples of such products are especially aerosol propellants, such as (halo)hydrocarbons. If water is used as the solvent, it is also possible to use, for example, organic solvents as auxiliary solvents.
• the surfactants may be non-ionic compounds, such as condensates of fatty acids, fatty alcohols or fatty-substituted phenols with ethylene oxide; fatty acid esters and ethers of sugars or polyhydric alcohols; the products that are obtained from sugars or polyhydric alcohols by condensation with ethylene oxide; block copolymers of ethylene oxide and propylene oxide; or alkyl dimethyl aminoxides.
• the surfactants may also be anionic compounds, such as soaps; fatty sulfate esters, for example dodecylsodium sulfate, octadecylsodium sulfate and cetylsodium sulfate; alkyl sulfonates, aryl sulfonates and fatty aromatic sulfonates, such as alkylbenzenesulfonates, for example calcium dodecylbenzenesulfonate, and butylnaphthalenesulfonates; and more complex fatty sulfonates, for example the amide condensates of oleic acid and N-methyltaurin and the sodium sulfonate of dioctyl succinate.
• anionic compounds such as soaps
• fatty sulfate esters for example dodecylsodium sulfate, octadecylsodium sulf
• the surfactants may be cationic compounds, such as alkyldimethylbenzylammonium chlorides, dialkyldimethylammonium chlorides, alkyltrimethylammonium chlorides and ethoxylated quaternary ammonium chlorides.
• Suitable dispersion agents are essentially: lignin, sodium and ammonium salts of lignosulfonic acid, sodium salts of maleic acid anhydride-diisobutylene copolymers, sodium and ammonium salts of sulfonated polycondensates of naphthalene and formaldehyde, and sulfite waste liquors.
• dispersion agents that are especially suitable as thickeners or anti-settling agents, for example, methylcellulose, carboxymethylcellulose, hydroxyethylcellulose, polyvinyl alcohol, alginates, caseinates and blood albumin.
• suitable stabilisers are acid-forming agents, for example epichlorohydrin, phenyl glycidyl ethers and soya epoxides; anti-oxidants, for example gallic acid esters and butylhydroxytoluene; UV-absorbers, for example substituted benzophenones, diphenyl- acrylonitrilic acid esters and cinnamic acid esters; and deactivators, for example salts of ethylenediaminetetraacetic acid and polyglycols.
• the fungicidal compositions according to the invention may, in addition to the compounds of formula I, also comprise other active ingredients, for example other types of fungicidal composition, insecticidal and acaricidal compositions, bactericides, plant growth regulators and fertilisers. Such combined compositions are suitable for broadening the activity spectrum, or for influencing plant growth in a specific manner.
• the fungicidal compositions according to the invention generally comprise from 0.0001 to 95 % by weight of compound(s) according to the invention as active ingredient(s). They may be in a form suitable for storage and transport. In such forms, for example emulsifiable concentrates, the active ingredient concentration is normally in the upper region of the above concentration range. Those forms can then be diluted with the same or different formulation auxiliaries to give active ingredient concentrations suitable for practical use, and such concentrations normally lie in the lower region of the above concentration range.
• Emulsifiable concentrates generally comprise from 5 to 85 % by weight, preferably from 25 to 75 % by weight, of the compound(s) according to the invention.
• Suitable forms of application are, inter alia, ready-for-use solutions, emulsions and suspensions, which are suitable, for example, as spray mixtures.
• the concentration of active ingredient in such spray mixtures may be, for example, from 0.0001 to 20 % by weight.
• spray mixtures may be formulated in which the active ingredient concentration is preferably from 0.5 to 20 % by weight, while the spray mixtures formulated in the low-volume process and in the high-volume process preferably have an active ingredient concentration of from 0.02 to 1.0 % by weight and from 0.002 to 0.1 % by weight, respectively.
• the fungicidal compositions according to the invention can be prepared by mixing at least one compound according to the invention with formulation auxiliaries.
• compositions can be prepared in known manner, for example by mixing the active ingredients with solid carriers, by dissolving or suspending in suitable solvents or dispersion agents, optionally with the use of surfactants as wetting agents or emulsifiers or of dispersion agents, by diluting pre-prepared emulsifiable concentrates with solvents or dispersion agents, etc..
• the active ingredient can be mixed with a solid carrier, for example by grinding them with one another; alternatively the solid carrier can be impregnated with a solution or suspension of the active ingredient and then the solvent or dispersion agent can be removed by evaporation, heating or by filtering with suction under reduced pressure.
• a solid carrier for example by grinding them with one another; alternatively the solid carrier can be impregnated with a solution or suspension of the active ingredient and then the solvent or dispersion agent can be removed by evaporation, heating or by filtering with suction under reduced pressure.
• surfactants or dispersion agents such pulverulent compositions can be rendered readily wettable with water so that they can be converted into aqueous suspensions which are suitable, for example, as spraying compositions.
• the compounds according to the invention can also be mixed with a surfactant and a solid carrier to form a wettable powder that is dispersible in water, or they can be mixed with a solid pre-granulated carrier to form a product in granule form.
• a compound according to the invention can be dissolved in a water-immiscible solvent, such as, for example, an alicyclic ketone, which advantageously contains dissolved emulsifier, so that the solution has self-emulsifying action when added to water.
• a water-immiscible solvent such as, for example, an alicyclic ketone, which advantageously contains dissolved emulsifier, so that the solution has self-emulsifying action when added to water.
• the active ingredient can be mixed with an emulsifier and the mixture can then be diluted with water to the desired concentration.
• the active ingredient can be dissolved in a solvent and then mixed with an emulsifier.
• Such a mixture can also be diluted with water to the desired concentration. In that manner, emulsifiable
• compositions according to the invention can be used in accordance with the methods of application customary in plant protection or in agriculture.
• the method according to the invention of controlling fungi comprises treating the material to be protected, for example plants, parts of plants, or seed, with an effective amount of a compound according to the invention or of a composition according to the invention.
• Example 1 59.92 g (0.21 mol) of 2-( ⁇ -bromo-o-tolyl)-3-methoxyacrylic acid methyl ester and 40.6 g (0.21 mol) of 3,4-ethylenedioxyacetophenoneoxime in 210 ml of methylene chloride are stirred intensively at room temperature for 10 minutes with 210 ml of 2.2N sodium hydroxide solution and 92.3 g of tetrabutylammonium hydrogen sulfate. Then the same amounts of methylene chloride, 2.2N sodium hydroxide solution and tetrabutylammonium hydrogen sulfate are added and the batch is stirred for a further 10 minutes. The same amounts of 2.2N sodium hydroxide solution and tetrabutylammonium hydrogen sulfate are then added again, followed, after a further 10 minutes' stirring, by saturated sodium hydrogen carbonate solution.
• the mixture is extracted three times with 150 ml of ethyl acetate each time, and the combined organic phases are washed with saturated sodium chloride solution and dried over anhydrous sodium sulfate. After removing the solvent by distillation, the oil that remains is purified by chromatography on silica gel using n-hexane/diethyl ether (3:2) as eluant.
• An emulsifiable concentrate has, for example, the following composition:
• N-methyl-2-pyrrolidone 200 mixture of alkylbenzenes (solvent) ad 1 litre
• a wettable powder has, for example, the following composition:
• the components are mixed with one another and finely ground in a suitable mill.
• a suspension that is suitable as a ready-for-use spray mixture is produced by dispersing the mixture in water.
• Example BI Action against Puccinia graminis in wheat
• Wheat plants are sprayed 6 days after sowing with a spray mixture (0.02 % active ingredient) prepared from a wettable powder formulation of the test compound. After 24 hours the treated plants are infected with a uredospore suspension of the fungus. The infected plants are incubated for 48 hours at 95-100 % relative humidity and about 20°C and then stood in a greenhouse at about 22°C. Evaluation of rust pustule development is made 12 days after infection. b) Systemic action
• Wheat plants are watered 5 days after sowing with a spray mixture (0.006 % active ingredient, based on the volume of the soil) prepared from a wettable powder formulation of the test compound. After 48 hours the treated plants are infected with a uredospore suspension of the fungus. The infected plants are then incubated for 48 hours at 95-100 % relative humidity and about 20°C and then stood in a greenhouse at about 22°C.
• a spray mixture 0.006 % active ingredient, based on the volume of the soil
• Puccinia attack is 100 % on untreated and infected control plants.
• Compounds of Table 1 exhibit good activity against Puccinia fungi.
• the following compounds inhibit Puccinia infestation to less than 20 %: nos. 1, 2, 3, 9, 10, 13, 15, 16, 21, 23, 36, 37, 38, 39, 41, 42, 43 and 44.
• Example B2 Action against Cercospora arachidicola on
• Groundnut plants 10-15 cm in height are watered with a spray mixture (0.06 % active ingredient, based on the volume of the soil) prepared from a wettable powder formulation of the test compound.
• the treated plants are infected 48 hours later with a conidia suspension of the fungus and then incubated for 72 hours at about 21°C and high humidity. The plants are then stood in a greenhouse and evaluation of fungus infestation is made 11 days later.
• Cercospora infestation on groundnut plants treated with compounds of Table 1 is substantially reduced.
• the Cercospora infestation is inhibited to less than 20 % with compounds nos. 1, 2, 3, 10, 11, 12, 13, 15, 16, 21, 23, 36, 37, 38, 39, 41, 42, 43, 44, 57, 58 and 59.
• Example B3 Action against Erysiphe graminis on barley
• Barley plants about 8 cm in height are sprayed with a spray mixture (0.02 % active ingredient) prepared from a wettable powder formulation of the test compound.
• the treated plants are dusted with conidia of the fungus after 3 to 4 hours.
• the infected barley plants are stood in a greenhouse at about 22°C.
• the fungus attack is evaluated after 10 days. b) Systemic action
• a spray mixture (0.006 % active ingredient, based on the volume of the soil) prepared from a wettable powder formulation of the test compound is used to water barley plants about 8 cm in height. Care is taken that the spray mixture does not come into contact with the parts of the plants above the soil. The treated plants are dusted 48 hours later with conidia of the fungus. The infected barley plants are then stood in a greenhouse at about 22°C and evaluation of fungus infestation is made after 10 days.
• Apple cuttings with 10-20 cm long fresh shoots are sprayed with a spray mixture (0.06 % active ingredient) prepared from a wettable powder formulation of the test compound.
• the treated plants are infected 24 hours later with a conidia suspension of the fungus.
• the plants are then incubated for 5 days at 90-100 % relative humidity and stood in a greenhouse for a further 10 days at 20-24°C.
• Scab infestation is evaluated 15 days after infection.
• Compounds of Table 1 inhibit the Venturia infestation to a substantial degree.
• Compounds nos. 1, 3, 21, 36, 37, 38, 39, 41, 42, 43, 44 and others limit the infestation to less than 20 %.
• Example B5 Action against Botrytis cinerea on beans.
• Bean plants about 10 cm in height are sprayed with a spray mixture (0.02 % active ingredient) prepared from a wettable powder formulation of the test compound. After 48 hours the treated plants are infected with a conidia suspension of the fungus. The infected plants are incubated for 3 days at 95-100 % relative humidity and 21°C and then evaluated for fungus infestation.
• the Botrytis infestation on untreated and infected bean plants is 100 %. After treatment with one of compounds nos.4, 13, 17, 21, 23, 24, 28, 36, 59 and 61 of formula I, the infestation is less than 20 %.
• Example B6 Action against Rhizoctonia solani (soil fungus on rice plants)
• a spray mixture prepared from a formulation of the test compound (0.006 % active ingredient) is used to water 12-day-old rice plants without wetting the parts of the plants above the soil.
• a suspension of mycelium and sclerotia of R. solani is applied to the surface of the soil in order to infect the treated plants.
• the plants are incubated for 6 days at 27°C (day) and 23°C (night) and 100 % relative humidity (humidity box) in a climatic chamber and then evaluation is made of the fungus infestation on the leaf sheath, leaves and stems.
• 12-day-old rice plants are sprayed with the spray mixture mentioned under a).
• the treated plants are infected one day later with a suspension of mycelium and sclerotia of R. solani.
• the plants are incubated for 6 days at 27°C (day) and 23°C (night) and 100 % relative humidity (humidity box) in a climatic chamber and then evaluation is made of the fungus infestation on the leaf sheath, leaves and stems.
• Compounds of Table 1 exhibit good activity by inhibiting the Rhizoctonia infestation. By contrast, infestation is 100 % on the untreated and infected control plants. The fungus infestation is inhibited to substantially below 20 % by compounds nos. 2, 9, 17, 23, 24, 59, 61 and 63.
• Example B7 Action against Phytophthora infestans on tomatoes
• Tomato plants of the "Roter Gnom" variety are reared for three weeks and then sprayed with a zoospore suspension of the fungus and incubated in a chamber at 18 to 20°C and saturation humidity. Humidity is discontinued after 24 hours.
• the plants When the plants have dried they are sprayed with a mixture comprising a wettable powder formulation of the test compound at a concentration of 200 ppm. After the spray coating has dried, the plants are placed in the humidity chamber again for 4 days. The number and size of the typical leaf specks that have occurred after this period are used as a standard for evaluating the activity of the test compounds.
• Preventive systemic action is used as a standard for evaluating the activity of the test compounds.
• a wettable powder formulation of the test compound is applied at a concentration of 60 ppm (based on the volume of the soil) to the soil surface of three-week-old tomato plants of the "Roter Gnom" variety in pots. After a waiting period of three days, the undersides of the leaves are sprayed with a zoospore suspension of Phytophthora infestans. They are then kept in a spray chamber for 5 days at 18 to 20°C and saturation humidity. At the end of this period typical leaf specks form, the number and size of which are used to evaluate the activity of the test compounds.
• Example B8 Action against Plasmopara viticola (Bert, et Curt.) (Berl. et Detoni) on vines a) Residual-preventive action
• Vine cuttings of the "Chasselas" variety are reared in a greenhouse.
• 3 plants are sprayed with a mixture (200 ppm active ingredient) prepared from a wettable powder formulation of the test compound.
• the undersides of the leaves are uniformly infected with a spore suspension of the fungus.
• the plants are then kept for 8 days in a humidity chamber. At the end of this period clear symptoms of the disease appear on the control plants.
• the number and size of the infected sites on the treated plants are used as a standard for evaluating the activity of the test compounds.
• Vine cuttings of the "Chasselas" variety are reared in a greenhouse and, at the 10-leaf stage, the undersides of the leaves are infected with a spore suspension of Plasmopara viticola. After 24 hours in the humidity chamber, the plants are sprayed with an active ingredient mixture prepared from a wettable powder formulation of the test compound (500 ppm active ingredient). The plants are then kept for a further 7 days in the humidity chamber. At the end of this period, the symptoms of the disease appear on the control plants. The number and size of the infected sites on the treated plants are used as a standard for evaluating the activity of the test compounds.
• the compounds of formula I especially compounds nos. 1, 2, 3, 4, 9, 10, 11, 13, 15, 16, 17, 23, 24, 28, 36, 37, 38, 41, 42, 43, 44, 56, 57, 58, 59, 60, 61, 62 and 63, strongly inhibit the Plasmopara infestation to, in some cases, less than 10 %.
• the fungus is cultivated on sterile oat grains and added to a mixture of earth and sand.
• the earth so infected is introduced into flowerpots and sown with sugarbeet seeds.
• an aqueous suspension (20 ppm active ingredient based on the volume of the earth) prepared from a wettable powder formulation of the test preparation is poured over the earth.
• the pots are then stood in a greenhouse at 20-24°C for 2-3 weeks.
• the earth is kept constantly and uniformly moist by light spraying with water.
• the test is evaluated by determining the rate of emergence of the sugarbeet plants and the proportion of healthy and diseased plants.
• the fungus is cultivated on sterile oat grains and added to a mixture of earth and sand.
• the earth so infected is introduced into flowerpots and sown with sugarbeet seed which has been dressed with a dressing powder formulation of the test preparation (1000 ppm active ingredient based on the weight of the seed).
• the pots containing the seeds are stood in a greenhouse for 2-3 weeks at 20-24°C.
• the earth is kept uniformly moist by light spraying with water.
• the test is evaluated by determining the rate of emergence of the sugarbeet plants and the proportion of healthy and diseased plants.
• a rate of emergence of more than 80 % is achieved with compounds of Table 1.
• the corresponding control plants have a rate of emergence of less than 30 % and an unhealthy appearance.

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• 1991
  • 1991-04-19 CH CH117491A patent/CH686307A5/de not_active IP Right Cessation
• 1992
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