Patent Grant
6969697
This application is a 371 of PCT/EP01/02279 filed Mar. 01, 2001.
The invention relates to novel substituted benzoylcyclohexenones, to processes for their preparation and to their use as herbicides.
It is already known that certain substituted benzoylcyclohexanediones have herbicidal properties (cf. EP-A-090 262, EP-A-135 191, EP-A-186 118, EP-A-186 119, EP-A-186 120, EP-A-319 075, WO-A-96/26200, WO-A-97/46530, WO-A-99/07688, WO-A-00/05221). However, the activity of these compounds is not in all respects satisfactory.
This invention, accordingly, provides the novel substituted benzoylcyclohexenones of the formula (I),
in which
In the definitions, the hydrocarbon chains, such as alkyl or alkanediyl, are in each case straight-chain or branched—including in combination with heteroatoms, such as in alkoxy.
Preferred meanings of the radicals or groupings present in the formulae shown above and below are defined below.
The invention preferably also provides the sodium, potassium, magnesium, calcium, ammonium, C1-C4-alkyl-ammonium, di-(C1-C4-alkyl)-ammonium, tri-(C1-C4-alkyl)-ammonium, tetra-(C1-C4-alkyl)-ammonium, tri-(C1-C4-alkyl)-sulphonium, C5- or C6-Cycloalkyl-ammonium and di-(C1-C2-alkyl)-benzyl-ammonium salts of compounds of the formula (I), in which A, n, R1, R2, R3, R4, Y and Z are each as defined above, or else complex compounds (coordination compounds) of these compounds with metals such as copper, iron, cobalt, nickel.
Preference according to the invention is given to compounds of the formula (I) which contain a combination of the meanings mentioned above as being preferred.
Particular preference according to the invention is given to compounds of the formula (I) which contain a combination of the meanings listed above as being particularly preferred.
Very particular preference according to the invention is given to compounds of the formula (I) which contain a combination of the meanings listed above as being very particularly preferred.
Most preference according to the invention is given to compounds of the formula (I) which contain a combination of the meanings listed above as being most preferred.
The general or preferred radical definitions listed above apply both to the end products of the formula (I) and, correspondingly, to the starting materials or intermediates required in each case for the preparation. These radical definitions can be combined with one another as desired, i.e. including combinations between the given preferred ranges.
The position of the radicals R1, R2, R3, R4 and A-Z can vary according to formula (I).
The radical R3 is preferably in position (4) on the phenyl ring, particularly preferably in position (2).
The radical R4 is preferably in position (4) on the phenyl ring, if the radical R3 is in position (2).
The radical A-Z is preferably in position (2) on the phenyl ring, particularly preferably in position (3), and particular preference is given to the substitution pattern (2)-R3, (4)-R4 and (3)-A-Z.
The present invention provides in particular the compounds of the general formulae (IA), (IB) and (IC) below.
In the general formulae (IA), (IB) and (IC), n, A, R1, R2, R3, R4, Y and Z have in each case the meanings given in the definitions above.
Very particular emphasis is given to the compounds of the general formulae (IA), (IB) and (IC) in which A represents methylene.
Examples of compounds of the general formula (I) according to the invention are listed in the groups below.
Group 1
Here, R3, R4, R5 and R6 each have, for example, the meanings given in the table below:
Group 2
Here, R3, R4, R5 and R6 each have, for example, the meanings given above in Group 1.
Group 3
Here, R3, R4, R5 and R6 each have, for example, the meanings given above in Group 1.
Group 4
Here, R3, R4, R5 and R6 each have, for example, the meanings given above in Group 1.
Group 5
Here, R3, R4, R5 and R6 each have, for example, the meanings given above in Group 1.
Group 6
Here, R3, R4, R5 and R6 each have, for example, the meanings given above in the table below.
Group 7
Here, R3, R4, R5 and R6 each have, for example, the meanings given above in Group 6.
Group 8
Here, R3, R4, R5 and R6 each have, for example, the meanings given above in Group 6.
Group 9
Here, R3, R4, R5 and R6 each have, for example, the meanings given above in Group 6.
Group 10
Here, R3, R4, R5 and R6 each have, for example, the meanings given above in Group 6.
The novel substituted benzoylcyclohexenones of the formula (I) have strong and selective herbicidal activity.
The novel substituted benzoylcyclohexenones of the formula (I) are obtained when substituted cyclohexanediones of the formula (II)
in which
are reacted with a halogenating agent, if appropriate in the presence of a reaction auxiliary and if appropriate in the presence of a diluent, and the halogenocyclohexenones obtained in this way (in the first reaction step), of the formula (III)
in which
are reacted in a second reaction step with mercapto compounds of the formula (IV)
HS—Y (IV)
in which
if appropriate in the presence of a reaction auxiliary and if appropriate in the presence of a diluent,
and, if appropriate, the compounds of the formula (I) obtained in this manner are subsequently subjected in a customary manner, within the scope of the definition of the substituents, to electrophilic or nucleophilic substitution reactions or oxidation or reduction reactions, or the compounds of the formula (I) are converted in a customary manner into salts.
Using, for example 2-[4-chloro-2-[(3,4-dimethyl-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl)-methyl]-benzoyl]-cyclohexane-1,3-dione and phosgene and then thiophenol as starting materials, the course of the reaction in the process according to the invention can be illustrated by the following equation
The formula (II) provides a general definition of the substituted benzoylcyclohexanediones to be used as starting materials in the process according to the invention for preparing compounds of the general formula (I). In the general formula (II), A, R1, R2, R3, R4 and Z each preferably have those meanings which have already been mentioned above, in connection with the description of the compounds of the general formula (I) according to the invention, as being preferred, particularly preferred, very particularly preferred or most preferred for A, R1, R2, R3, R4 and Z.
The starting materials of the general formula (II) are known and/or can be prepared by processes known per se (cf. WO-A-00/05221).
The first reaction step of the process according to the invention for preparing the compounds of the general of the general formula (I) is carried out using a halogenating agent. The halogenating agent used can be a customary halogenating agent suitable for converting enols into the corresponding halogenoalkenes. Here, halogen preferably represents fluorine, chlorine or bromine, in particular chlorine, i.e. preference is given to using chlorinating agents or brominating agents. These include, preferably, phosgene, oxalyl chloride, oxalyl bromide, phosphorus(III) chloride, phosphorus(III) bromide, phosphoryl chloride, thionyl chloride and thionyl bromide.
The first reaction step of the process according to the invention for preparing the compounds of the general formula (I) is preferably carried out using a reaction auxiliary. Suitable reaction auxiliaries are the reaction auxiliaries customarily used for halogenating reactions. These preferably include acetonitrile, N,N-dimethyl-formamide, N,N-diethyl-formamide, N,N-dipropyl-formamide and N,N-dibutyl-formamide, and also N-methyl-pyrrolidone.
The formula (IV) provides a general definition of the mercapto compounds further to be used as starting materials in the process according to the invention for preparing compounds of the general formula (I). In the general formula (IV), Y preferably has in particular that meaning which has already been mentioned above, in connection with the description of the compounds of the general formula (I) according to the invention, as being preferred, particularly preferred or very particularly preferred for Y.
The starting materials of the general formula (IV) are known organic chemicals for synthesis.
The second reaction step of the process according to the invention for preparing compounds of the general formula (I) is preferably carried out using a reaction auxiliary. Suitable reaction auxiliaries are, in general, the customary inorganic or organic bases or acid acceptors. These preferably include alkali metal or alkaline earth metal acetates, amides, carbonates, bicarbonates, hydrides, hydroxides or alkoxides, such as, for example, sodium acetate, potassium acetate or calcium acetate, lithium amide, sodium amide, potassium amide or calcium amide, sodium carbonate, potassium carbonate or calcium carbonate, sodium bicarbonate, potassium bicarbonate or calcium bicarbonate, lithium hydride, sodium hydride, potassium hydride or calcium hydride, lithium hydroxide, sodium hydroxide, potassium hydroxide or calcium hydroxide, sodium methoxide, ethoxide, n- or i-propoxide, n-, i-, s- or t-butoxide or potassium methoxide, ethoxide, n- or i-propoxide, n-, i-, s- or t-butoxide; furthermore also basic organic nitrogen compounds, such as, for example, trimethylamine, triethylamine, tripropylamine, tributylamine, ethyl-diisopropylamine, N,N-dimethyl-cyclohexylamine, dicyclohexylamine, ethyl-dicyclohexylamine, N,N-dimethyl-aniline, N,N-dimethyl-benzylamine, pyridine, 2-methyl-, 3-methyl-, 4-methyl-, 2,4-dimethyl-, 2,6-dimethyl-, 3,4-dimethyl- and 3,5-dimethylpyridine, 5-ethyl-2-methyl-pyridine, 4-dimethylamino-pyridine, N-methyl-piperidine, 1,4-diazabicyclo[2.2.2]-octane (DABCO), 1,5-diazabicyclo[4.3.0]-non-5-ene (DBN), or 1,8 diazabicyclo[5.4.0]-undec-7-ene (DBU).
The first and the second step of the process according to the invention for preparing the compounds of the general formula (I) are preferably carried out using diluents. Suitable diluents are especially inert organic solvents. These include, in particular, aliphatic, alicyclic or aromatic, optionally halogenated hydrocarbons, such as, for example, benzine, benzene, toluene, xylene, chlorobenzene, dichlorobenzene, petroleum ether, hexane, cyclohexane, dichloromethane, chloroform, carbon tetrachloride; ethers, such as diethyl ether, diisopropyl ether, dioxane, tetrahydrofuran or ethylene glycol dimethyl ether or ethylene glycol diethyl ether; ketones, such as acetone, butanone or methyl isobutyl ketone; nitriles, such as acetonitrile, propionitrile or butyronitrile; amides, such as N,N-dimethylformamide, N,N-dimethylacetamide, N-methyl-formanilide, N-methyl-pyrrolidone or hexamethylphosphoric triamide; esters, such as methyl acetate or ethyl acetate; sulphoxides, such as dimethyl sulphoxide; alcohols, such as methanol, ethanol, n- or i-propanol, ethylene glycol monomethyl ether or ethylene glycol monoethyl ether.
When carrying out the first and the second step of the process according to the invention, the reaction temperatures can be varied within a relatively wide range. In general, the steps are carried out at temperatures between −20° C. and +150° C., preferably between 0° C. and 120° C.
The two steps of the process according to the invention are generally carried out under atmospheric pressure. However, it is also possible to carry out the process according to the invention under elevated or reduced pressure—in general between 0.1 bar and 10 bar.
For carrying out the process according to the invention, the starting materials are generally employed in approximately equimolar amounts. However, it is also possible to use a relatively large excess of one of the components. The reaction is generally carried out in a suitable diluent in the presence of a suitable reaction auxiliary and the reaction mixture is generally stirred at the required temperature for several hours. Work-up is carried out by customary methods (cf. the Preparation Examples).
The active compounds according to the invention can be used as defoliants, desiccants, haulm killers and, especially, as weed killers. Weeds in the broadest sense are understood to mean all plants which grow in locations where they are undesired. Whether the substances according to the invention act as total or selective herbicides depends essentially on the amount used.
The active compounds according to the invention can be used, for example, in connection with the following plants:
Dicotyledonous weeds of the genera: Abutilon, Amaranthus, Ambrosia, Anoda, Anthemis, Aphanes, Atriplex, Bellis, Bidens, Capsella, Carduus, Cassia, Centaurea, Chenopodium, Cirsium, Convolvulus, Datura, Desmodium, Emex, Erysimum, Euphorbia, Galeopsis, Galinsoga, Galium, Hibiscus, Ipomoea, Kochia, Lamium, Lepidium, Lindemia, Matricaria, Mentha, Mercurialis, Mullugo, Myosotis, Papaver, Pharbitis, Plantago, Polygonum, Portulaca, Ranunculus, Raphanus, Rorippa, Rotala, Rumex, Salsola, Senecio, Sesbania, Sida, Sinapis, Solanum, Sonchus, Sphenoclea, Stellaria, Taraxacum, Thlaspi, Trifolium, Urtica, Veronica, Viola, Xanthium.
Dicotyledonous crops of the genera: Arachis, Beta, Brassica, Cucumis, Cucurbita, Helianthus, Daucus, Glycine, Gossypium, Ipomoea, Lactuca, Linum, Lycopersicon, Nicotiana, Phaseolus, Pisum, Solanum, Vicia.
Monocotyledonous weeds of the genera: Aegilops, Agropyron, Agrostis, Alopecurus, Apera, Avena, Brachiaria, Bromus, Cenchrus, Commelina, Cynodon, Cyperus, Dactyloctenium, Digitaria, Echinochloa, Eleocharis, Eleusine, Eragrostis, Eriochloa, Festuca, Fimbristylis, Heteranthera, Imperata, Ischaemum, Leptochloa, Lolium, Monochoria, Panicum, Paspalum, Phalaris, Phleum, Poa, Rottboellia, Sagittaria, Scirpus, Setaria, Sorghum.
Monocotyledonous crops of the genera: Allium, Ananas, Asparagus, Avena, Hordeum, Oryza, Panicum, Saecharum, Secale, Sorghum, Triticale, Triticum, Zea.
However, the use of the active compounds according to the invention is in no way restricted to these genera, but also extends in the same manner to other plants.
The active compounds according to the invention are suitable, depending on the concentration, for the total control of weeds, for example on industrial terrain and rail tracks, and on paths and areas with and without tree plantings. Similarly, the active compounds according to the invention can be employed for controlling weeds in perennial crops, for example forests, decorative tree plantings, orchards, vineyards, citrus groves, nut orchards, banana plantations, coffee plantations, tea plantations, rubber plantations, oil palm plantations, cocoa plantations, soft fruit plantings and hop fields, on lawns, turf and pastureland, and for the selective control of weeds in annual crops.
The compounds of the formula (I) according to the invention have strong herbicidal activity and a broad activity spectrum when used on the soil or on above-ground parts of plants. To a certain extent, they are also suitable for the selective control of monocotyledonous and dicotyledonous weeds in monocotyledonous and dicotyledonous crops, both by the pre-emergence and by the post-emergence method.
At certain concentrations or application rates, the active compounds according to the invention can also be employed for controlling animal pests and fungal or bacterial plant diseases. If appropriate, they can also be used as intermediates or precursors for the synthesis of other active compounds.
According to the invention, it is possible to treat all plants and parts of plants. Plants are to be understood here as meaning all plants and plant populations such as desired and undesired wild plants or crop plants (including naturally occurring crop plants). Crop plants can be plants which can be obtained by conventional breeding and optimization methods or by biotechnological and genetic engineering methods or combinations of these methods, including the transgenic plants and including plant cultivars which can or cannot be protected by plant breeders' certificates. Parts of plants are to be understood as meaning all above-ground and below-ground parts and organs of plants, such as shoot, leaf, flower and root, examples which may be mentioned being leaves, needles, stems, trunks, flowers, fruit-bodies, fruits and seeds and also roots, tubers and rhizomes. Parts of plants also include harvested plants and vegetative and generative propagation material, for example seedlings, tubers, rhizomes, cuttings and seeds.
The treatment of the plants and parts of plants according to the invention with the active compounds is carried out directly or by action on their environment, habitat or storage area according to customary treatment methods, for example by dipping, spraying, evaporating, atomizing, broadcasting, brushing-on and, in the case of propagation material, in particular in the case of seeds, furthermore by one- or multi-layer coating.
The active compounds can be converted into the customary formulations, such as solutions, emulsions, wettable powders, suspensions, powders, dusts, pastes, soluble powders, granules, suspo-emulsion concentrates, natural and synthetic substances impregnated with active compound, and microencapsulations in polymeric substances.
These formulations are produced in a known manner, for example by mixing the active compounds with extenders, that is to say liquid solvents and/or solid carriers, optionally with the use of surfactants, that is to say emulsifiers and/or dispersants and/or foam formers.
If the extender used is water, it is also possible to use, for example, organic solvents as auxiliary solvents. Liquid solvents which are mainly suitable are: aromatics, such as xylene, toluene or alkylnaphthalenes, chlorinated aromatics and chlorinated aliphatic hydrocarbons, such as chlorobenzenes, chloroethylenes or methylene chloride, aliphatic hydrocarbons, such as cyclohexane or paraffins, for example petroleum fractions, mineral and vegetable oils, alcohols, such as butanol or glycol, and also their ethers and esters, ketones, such as acetone, methyl ethyl ketone, methyl isobutyl ketone or cyclohexanone, strongly polar solvents, such as dimethylformamide and dimethyl sulphoxide, and water.
Suitable solid carriers are: for example ammonium salts and ground natural minerals, such as kaolins, clays, talc, chalk, quartz, attapulgite, montmorillonite or diatomaceous earth, and ground synthetic minerals, such as finely divided silica, alumina and silicates; suitable solid carriers for granules are: for example crushed and fractionated natural rocks, such as calcite, marble, pumice, sepiolite, dolomite and synthetic granules of inorganic and organic meals, and granules of organic material, such as sawdust, coconut shells, maize cobs and tobacco stalks; suitable emulsifiers and/or foam formers are: for example nonionic and anionic emulsifiers, such as polyoxyethylene fatty acid esters, polyoxyethylene fatty alcohol ethers, for example alkylaryl polyglycol ethers, alkylsulphonates, alkyl sulphates, arylsulphonates and protein hydrolysates; suitable dispersants are: for example lignosulphite waste liquors and methylcellulose.
Tackifiers, such as carboxymethylcellulose, natural and synthetic polymers in the form of powders, granules or latices, such as gum arabic, polyvinyl alcohol and polyvinyl acetate, and also natural phospholipids, such as cephalins and lecithins, and synthetic phospholipids can be used in the formulations. Other possible additives are mineral and vegetable oils.
It is possible to use colorants, such as inorganic pigments, for example iron oxide, titanium oxide, Prussian blue, and organic dyestuffs, such as alizarin dyestuffs, azo dyestuffs and metal phthalocyanine dyestuffs, and trace nutrients, such as salts of iron, manganese, boron, copper, cobalt, molybdenum and zinc.
The formulations generally comprise between 0.1 and 95 percent by weight of active compound, preferably between 0.5 and 90%.
For controlling weeds, the active compounds according to the invention, as such or in their formulations, can also be used as mixtures with known herbicides and/or substances which improve the compatibility with crop plants (“safeners”), finished formulations or tank mixes being possible. Also possible are mixtures with weed-killers comprising one or more known herbicides and a safener.
Possible components for the mixtures are known herbicides, for example acetochlor, acifluorfen (-sodium), aclonifen, alachlor, alloxydim (-sodium), ametryne, amicarbazone, amidochlor, amidosulfuron, anilofos, asulam, atrazine, azafenidin, azimsulfuron, beflubutamid, benazolin (-ethyl), benfuresate, bensulfuron (-methyl), bentazon, benzfendizone, benzobicyclon, benzofenap, benzoylprop(-ethyl), bialaphos, bifenox, bispyribac (-sodium), bromobutide, bromofenoxim, bromoxynil, butachlor, butafenacil (-allyl), butroxydim, butylate, cafenstrole, caloxydim, carbetamide, carfentrazone (-ethyl), chlomethoxyfen, chloramben, chloridazon, chlorimuron (-ethyl), chlomitrofen, chlorsulfuron, chlortoluron, cinidon (-ethyl), cinmethylin, cinosulfuron, clefoxydim, clethodim, clodinafop (-propargyl), clomazone, clomeprop, clopyralid, clopyrasulfuron (-methyl), cloransulam (-methyl), cumyluron, cyanazine, cybutryne, cycloate, cyclosulfamuron, cycloxydim, cyhalofop (-butyl), 2,4-D, 2,4-DB, desmedipham, diallate, dicamba, dichlorprop (-P), diclofop (-methyl), diclosulam, diethatyl (-ethyl), difenzoquat, diflufenican, diflufenzopyr, dimefuron, dimepiperate, dimethachlor, dimethametryn, dimethenamid, dimexyflam, dinitramine, diphenamid, diquat, dithiopyr, diuron, dymron, epropodan, EPTC, esprocarb, ethalfluralin, ethametsulfuron (-methyl), ethofumesate, ethoxyfen, ethoxysulfuron, etobenzanid, fenoxaprop (-P-ethyl), fentrazamide, flamprop (-isopropyl, -isopropyl-L, -methyl), flazasulfuron, florasulam, fluazifop (-P-butyl), fluazolate, flucarbazone (-sodium), flufenacet, flumetsulam, flumiclorac (-pentyl), flumioxazin, flumipropyn, flumetsulam, fluometuron, fluorochloridone, fluoroglycofen (-ethyl), flupoxam, flupropacil, flurpyrsulfuron (-methyl, -sodium), flurenol (-butyl), fluridone, fluroxypyr (-butoxypropyl, -meptyl), flurprimidol, flurtamone, fluthiacet (-methyl), fluthiamide, fomesafen, foramsulfuron, glufosinate (-ammonium), glyphosate (-isopropylammonium), halosafen, haloxyfop (-ethoxyethyl, -P-methyl), hexazinone, imazamethabenz (-methyl), imazamethapyr, imazamox, imazapic, imazapyr, imazaquin, imazethapyr, imazosulfuron, iodosulfuron (-methyl, -sodium), ioxynil, isopropalin, isoproturon, isouron, isoxaben, isoxachlortole, isoxaflutole, isoxapyrifop, lactofen, lenacil, linuron, MCPA, mecoprop, mefenacet, mesotrione, metamitron, metazachlor, methabenzthiazuron, metobenzuron, metobromuron, (alpha-)metolachlor, metosulam, metoxuron, metribuzin, metsulfuron (-methyl), molinate, monolinuron, naproanilide, napropamide, neburon, nicosulfuron, norflurazon, orbencarb, oryzalin, oxadiargyl, oxadiazon, oxasulfuron, oxaziclomefone, oxyfluorfen, paraquat, pelargonic acid, pendimethalin, pendralin, pentoxazone, phemnedipham, picolinafen, piperophos, pretilachlor, primisulfuron (-methyl), profluazol, prometryn, propachlor, propanil, propaquizafop, propisochlor, procarbazone (-sodium), propyzamide, prosulfocarb, prosulfuron, pyraflufen (-ethyl), pyrazogyl, pyrazolate, pyrazosulfuron (-ethyl), pyrazoxyfen, pyribenzoxim, pyributicarb, pyridate, pyridatol, pyriftalid, pyriminobac (-methyl), pyrithiobac (-sodium), quinchlorac, quinmerac, quinoclamine, quizalofop (-P-ethyl, -P-tefuryl), rimsulfuron, sethoxydim, simazine, simetryn, sulcotrione, sulfentrazone, sulfometuron (-methyl), sulfosate, sulfosulfuron, tebutam, tebuthiuron, tepraloxydim, terbuthylazine, terbutryn, thenylchlor, thiafluamide, thiazopyr, thidiazimin, thifensulfuron (-methyl), thiobencarb, tiocarbazil, tralkoxydim, triallate, triasulfuron, tribenuron (-methyl), triclopyr, tridiphane, trifluralin, trifloxysulfuron, triflusulfuron (-methyl), tritosulfuron.
A mixture with other known active compounds, such as fungicides, insecticides, acaricides, nematicides, bird repellents, plant nutrients and agents which improve soil structure, is also possible.
The active compounds can be used as such, in the form of their formulations or in the use forms, prepared therefrom by further dilution, such as ready-to-use solutions, suspensions, emulsions, powders, pastes and granules. They are used in a customary manner, for example by watering, spraying, atomizing or broadcasting.
The active compounds according to the invention can be applied both before and after emergence of the plants. They can also be incorporated into the soil before sowing.
The amount of active compound used can vary within a relatively wide range. It depends essentially on the nature of the desired effect. In general, the amounts used are between 1 g and 10 kg of active compound per hectare of soil surface, preferably between 5 g and 5 kg per ha.
The preparation and the use of the active compounds according to the invention is illustrated by the examples below.
A mixture of 1.3 g (3 mmol) of 2-[2,4-dichloro-3-[(3-methyl-2-oxo-tetrahydro-1(2H)-pyrimidinyl)-methyl]-benzoyl]-cyclohexane-1,3-dione, 1.0 g (7.5 mmol) of oxalyl chloride, 2 drops of N,N-dimethyl-formamide and 30 ml of methylene chloride is heated under reflux for 30 minutes and then concentrated under water pump vacuum. The residue is taken up in 50 ml of tetrahydrofuran and admixed with 0.33 g (3 mmol) of thiophenol. With ice-cooling, 0.50 g (4.5 mmol) of triethylamine is then added dropwise. The ice-cooling is removed, and the mixture is then stirred at room temperature for 2 hours and subsequently concentrated under water pump vacuum. The residue is taken up in methylene chloride, washed once each with 1N hydrochloric acid, water and saturated aqueous sodium chloride solution, dried with sodium sulphate and filtered. The filtrate is concentrated under water pump vacuum, the residue is digested with diethyl ether and the resulting crystalline product is isolated by filtration with suction.
This gives 0.91 g (61% of theory) of 1-[2,6-dichloro-3-[(6-oxo-2-phenylthio-1-cyclohexen -1-yl)-carbonyl]-benzyl]-3-methyl-tetrahydro-2(1H)-pyrimidinone of melting point 140° C.
Analogously to Example 1 and in accordance with the general description of the preparation process according to the invention, it is also possible to prepare, for example, the compounds of the general formula (I)—or those of the general formula (ID)—listed in Table 1 below.
The logP values given in Table 1 were determined in accordance with EEC Directive 79/831 Annex V.A8 by HPLC (High Performance Liquid Chromatography) using a reversed-phase column (C 18). Temperature: 43° C.
Calibration was carried out using unbranched alkan-2-ones (having 3 to 16 carbon atoms), with known logP values (determination of the logP values by the retention times using linear interpolation between two successive alkanones).
The lambda max values were determined in the maxima of the chromatographic signals, using the UV spectra from 200 nm to 400 nm.
Pre-Emergence Test
To produce a suitable preparation of active compound, 1 part by weight of active compound is mixed with the stated amount of solvent, the stated amount of emulsifier is added and the concentrate is diluted with water to the desired concentration.
Seeds of the test plants are sown in normal soil. After 24 hours, the soil is sprayed with the preparation of active compound such that the particular amount of active compound desired is applied per unit area. The concentration of active compound in the spray liquor is chosen such that the particular amount of active compound desired is applied in 1000 litres of water per hectare.
After three weeks, the degree of damage to the plants is rated in % damage in comparison to the development of the untreated control. The figures denote:
In this test, for example, the compound of the Preparation Example 16 exhibits strong activity against weeds, and is tolerated well by some crop plants, such as, for example, maize.
Post-Emergence Test
To produce a suitable preparation of active compound, 1 part by weight of active compound is mixed with the stated amount of solvent, the stated amount of emulsifier is added and the concentrate is diluted with water to the desired concentration.
Test plants of a height of 5-15 cm are sprayed with the preparation of active compound such that the particular amounts of active compound desired are applied per unit area. The concentration of the spray liquor is chosen such that the particular amounts of active compound desired are applied in 1000 l of water/ha.
After three weeks, the degree of damage to the plants is rated in % damage in comparison to the development of the untreated control.
The figures denote:
In this test, for example, the compounds of Preparation Examples 1, 2, 5, 16, 17, 18, 19 and 20 exhibit strong activity against weeds, and they are tolerated well by some crop plants, such as, for example, maize and wheat.
| Number | Date | Country | Kind |
|---|---|---|---|
| 100 10 937 | Mar 2000 | DE | national |
| 100 28 687 | Jun 2000 | DE | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/EP01/02279 | 3/1/2001 | WO | 00 | 10/21/2002 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO01/66527 | 9/13/2001 | WO | A |
| Number | Name | Date | Kind |
|---|---|---|---|
| 5977376 | Araki et al. | Nov 1999 | A |
| 6004903 | von Deyn et al. | Dec 1999 | A |
| 6153759 | von Deyn et al. | Nov 2000 | A |
| Number | Date | Country |
|---|---|---|
| 199 21 732 | Jan 2000 | DE |
| 0 135 191 | Oct 1985 | EP |
| 0 186 120 | Nov 1988 | EP |
| 0 186 119 | Aug 1989 | EP |
| 0 186 118 | May 1990 | EP |
| 0 090 262 | Aug 1992 | EP |
| 0 319 075 | Jul 1994 | EP |
| 9746530 | Dec 1997 | WO |
| 9907688 | Feb 1999 | WO |
| Number | Date | Country | |
|---|---|---|---|
| 20040002599 A1 | Jan 2004 | US |
