Patent Application
20110003692
The invention relates to the technical field of the crop protection agents, in particular that of the herbicides for the selective control of broad-leaved weed and weed grasses in crops of useful plants.
It specifically relates to aryl-substituted pyridazinone derivatives, processes for their preparation and their use as herbicides and insecticides.
Various publications describe substituted 4-phenylpyridazinones having herbicidal properties. 2-Methyl-4-phenylpyridazinones are known from Stevenson et. al, J. Het. Chem., (2005), 427 ff. WO2007/119434 A1 describes 4-phenylpyridazinones which carry an alkyl radical in the 2-position of the phenyl ring. WO2009/035150 A2 discloses 4-phenylpyridazinones which carry an alkyl or alkoxy radical in the 2-position of the phenyl ring and are optionally substituted at the other positions by halogen atoms or other radicals.
However, the compounds known from these publications frequently have insufficient herbicidal activity. Accordingly, it is an object of the present invention to provide alternative herbicidally active compounds.
It has been found that 4-phenylpyridazinones whose phenyl ring carries certain substituents are particularly suitable as herbicides.
The present invention provides 4-phenylpyridazinones of the formula (I)
in which
A and B are in each case independently of one another hydrogen, (C3-C6)-cycloalkyl or (C1-C6)-alkyl substituted by n radicals from the group consisting of halogen, (C3-C6)-cycloalkyl, phenyl and halophenyl,
n is 0, 1, 2 or 3;
R8 is (C1-C6)-alkyl, (C2-C6)-alkenyl, (C2-C6)-alkynyl, (C1-C4)-alkoxy-(C1-C6)-alkyl, (C1-C4)-alkylthio-(C1-C4)-alkyl or di-(C1-C4)-alkoxy-(C1-C6)-alkyl substituted by n halogen atoms,
(C3-C6)-cycloalkyl substituted by n radicals from the group consisting of halogen, (C1-C4)-alkyl and (C1-C4)-alkoxy,
a fully saturated 3- to 6-membered ring consisting of 3 to 5 carbon atoms and 1 to 3 heteroatoms from the group consisting of oxygen, sulfur and nitrogen which is substituted by n radicals from the group consisting of halogen, (C1-C4)-alkyl and (C1-C4)-alkoxy,
phenyl, phenyl-(C1-C4)-alkyl, heteroaryl, phenoxy-(C1-C4)-alkyl or heteroaryloxy-(C1-C4)-alkyl substituted by n radicals from the group consisting of halogen, (C1-C4)-alkyl and (C1-C4)-alkoxy;
and
a) X is hydrogen, (C1-C6)-alkyl or (C3-C6)-cycloalkyl;
Compounds of the formula (I) according to the invention in which G is R8 can also be prepared, for example, according to Scheme 3 by reactions known to the person skilled in the art of compounds of the formula (III) with compounds of the formula (IV). Here, Z′ is bromine or iodine and Q is a trialkyltin group, a magnesium halide group or, preferably, a boronic acid or an ester thereof. These reactions are usually carried out in the presence of a catalyst (for example a Pd salt or a Pd complex) and in the presence of a base (for example sodium carbonate, potassium phosphate).
If the compounds of the formula (I) carry hydroxyl groups, carboxyl groups or other groups which induce acidic properties, these compounds can be reacted with bases to salts.
Suitable bases are, for example, hydroxides, carbonates, bicarbonates of the alkali and alkaline earth metals, in particular those of sodium, potassium, magnesium and calcium, furthermore ammonia, primary, secondary and tertiary amins having (C1-C4)-alkyl groups, mono-, di- and trialkanolamines of (C1-C4)-alkanols, choline and also chlorocholine.
Halogen is fluorine, chlorine, bromine and iodine.
A metal ion equivalent is a metal ion having a positive charge, such as Na+, K+, (Mg2+)1/2, (Ca2+)1/2, MgH+, CaH+, (Al3+)1/3 (Fe2+)1/2 or (Fe3+)1/3.
Alkyl is a saturated straight-chain or branched hydrocarbon radical having 1 to 8 carbon atoms, for example C1-C6-alkyl such as methyl, ethyl, propyl, 1-methylethyl, butyl, 1-methylpropyl, 2-methylpropyl, 1,1-dimethylethyl, pentyl, 1-methylbutyl, 2-methylbutyl, 3-methylbutyl, 2,2-dimethylpropyl, 1-ethylpropyl, hexyl, 1,1-dimethylpropyl, 1,2-dimethylpropyl, 1-methylpentyl, 2-methylpentyl, 3-methylpentyl, 4-methylpentyl, 1,1-dimethylbutyl, 1,2-dimethylbutyl, 1,3-dimethylbutyl, 2,2-dimethylbutyl, 2,3-dimethylbutyl, 3,3-dimethylbutyl, 1-ethylbutyl, 2-ethylbutyl, 1,1,2-trimethylpropyl, 1,2,2-trimethylpropyl, 1-ethyl-1-methylpropyl and 1-ethyl-2-methyl-propyl.
Haloalkyl is a straight-chain or branched alkyl group having 1 to 8 carbon atoms (as mentioned above), where some or all of the hydrogen atoms in this group may be replaced by halogen atoms, for example C1-C2-haloalkyl such as chloromethyl, bromomethyl, dichloromethyl, trichloromethyl, fluoromethyl, difluoromethyl, trifluoro-methyl, chlorofluoromethyl, dichlorofluoromethyl, chlorodifluoromethyl, 1-chloroethyl, 1-bromoethyl, 1-fluoroethyl, 2-fluoroethyl, 2,2-difluoroethyl, 2,2,2-trifluoroethyl, 2-chloro-2-fluoroethyl, 2-chloro-2,2-difluoroethyl, 2,2-dichloro-2-fluoroethyl, 2,2,2-trichloroethyl, pentafluoroethyl and 1,1,1-trifluoroprop-2-yl.
Alkenyl is an unsaturated straight-chain or branched hydrocarbon radical having 2 to 8 carbon atoms and a double bond in any position, for example C2-C6-alkenyl such as ethenyl, 1-propenyl, 2-propenyl, 1-methylethenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-methyl-1-propenyl, 2-methyl-1-propenyl, 1-methyl-2-propenyl, 2-methyl-2-propenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, 1-methyl-1-butenyl, 2-methyl-1-butenyl, 3-methyl-1-butenyl, 1-methyl-2-butenyl, 2-methyl-2-butenyl, 3-methyl-2-butenyl, 1-methyl-3-butenyl, 2-methyl-3-butenyl, 3-methyl-3-butenyl, 1,1-dimethyl-2-propenyl, 1,2-dimethyl-1-propenyl, 1,2-dimethyl-2-propenyl, 1-ethyl-1-propenyl, 1-ethyl-2-propenyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, 4-hexenyl, 5-hexenyl, 1-methyl-1-pentenyl, 2-methyl-1-pentenyl, 3-methyl-1-pentenyl, 4-methyl-1-pentenyl, 1-methyl-2-pentenyl, 2-methyl-2-pentenyl, 3-methyl-2-pentenyl, 4-methyl-2-pentenyl, 1-methyl-3-pentenyl, 2-methyl-3-pentenyl, 3-methyl-3-pentenyl, 4-methyl-3-pentenyl, 1-methyl-4-pentenyl, 2-methyl-4-pentenyl, 3-methyl-4-pentenyl, 4-methyl-4-pentenyl, 1,1-dimethyl-2-butenyl, 1,1-dimethyl-3-butenyl, 1,2-dimethyl-1-butenyl, 1,2-dimethyl-2-butenyl, 1,2-dimethyl-3-butenyl, 1,3-dimethyl-1-butenyl, 1,3-dimethyl-2-butenyl, 1,3-dimethyl-3-butenyl, 2,2-dimethyl-3-butenyl, 2,3-dimethyl-1-butenyl, 2,3-dimethyl-2-butenyl, 2,3-dimethyl-3-butenyl, 3,3-dimethyl-1-butenyl, 3,3-dimethyl-2-butenyl, 1-ethyl-1-butenyl, 1-ethyl-2-butenyl, 1-ethyl-3-butenyl, 2-ethyl-1-butenyl, 2-ethyl-2-butenyl, 2-ethyl-3-butenyl, 1,1,2-trimethyl-2-propenyl, 1-ethyl-1-methyl-2-propenyl, 1-ethyl-2-methyl-1-propenyl and 1-ethyl-2-methyl-2-propenyl.
Alkoxy is a saturated straight-chain or branched alkoxy radical having 1 to 8 carbon atoms, for example C1-C6-alkoxy such as methoxy, ethoxy, propoxy, 1-methylethoxy, butoxy, 1-methylpropoxy, 2-methylpropoxy, 1,1-dimethylethoxy, pentoxy, 1-methylbutoxy, 2-methylbutoxy, 3-methylbutoxy, 2,2-dimethylpropoxy, 1-ethylpropoxy, hexoxy, 1,1-dimethylpropoxy, 1,2-dimethylpropoxy, 1-methylpentoxy, 2-methylpentoxy, 3-methylpentoxy, 4-methylpentoxy, 1,1-dimethylbutoxy, 1,2-dimethylbutoxy, 1,3-dimethylbutoxy, 2,2-dimethylbutoxy, 2,3-dimethylbutoxy, 3,3-dimethylbutoxy, 1-ethylbutoxy, 2-ethylbutoxy, 1,1,2-trimethylpropoxy, 1,2,2-trimethyl-propoxy, 1-ethyl-1-methylpropoxy and 1-ethyl-2-methylpropoxy;
Haloalkoxy is a straight-chain or branched alkoxy group having 1 to 8 carbon atoms (as mentioned above), where some or all of the hydrogen atoms in this group may be replaced by halogen atoms as mentioned above, for example C1-C2-haloalkoxy such as chloromethoxy, bromomethoxy, dichloromethoxy, trichloromethoxy, fluoromethoxy, difluoromethoxy, trifluoromethoxy, chlorofluoromethoxy, dichlorofluoromethoxy, chlorodifluoromethoxy, 1-chloroethoxy, 1-bromoethoxy, 1-fluoroethoxy, 2-fluoroethoxy, 2,2-difluoroethoxy, 2,2,2-trifluoroethoxy, 2-chloro-2-fluoroethoxy, 2-chlor-2,2-difluoroethoxy, 2,2-dichloro-2-fluoroethoxy, 2,2,2-trichloroethoxy, pentafluoroethoxy and 1,1,1-trifluoroprop-2-oxy.
Alkylthio is a saturated straight-chain or branched alkylthio radical having 1 to 8 carbon atoms, for example C1-C6-alkylthio such as methylthio, ethylthio, propylthio, 1-methylethylthio, butylthio, 1-methyl-propylthio, 2-methylpropylthio, 1,1-dimethylethylthio, pentylthio, 1-methylbutylthio, 2-methylbutylthio, 3-methylbutylthio, 2,2-di-methylpropylthio, 1-ethylpropylthio, hexylthio, 1,1-dimethylpropylthio, 1,2-dimethylpropylthio, 1-methylpentylthio, 2-methylpentylthio, 3-methylpentylthio, 4-methylpentylthio, 1,1-dimethylbutylthio, 1,2-dimethylbutylthio, 1,3-dimethyl-butylthio, 2,2-dimethylbutylthio, 2,3-dimethylbutylthio, 3,3-dimethylbutylthio, 1-ethylbutylthio, 2-ethylbutylthio, 1,1,2-trimethylpropylthio, 1,2,2-trimethylpropylthio, 1-ethyl-1-methylpropylthio and 1-ethyl-2-methylpropylthio;
Haloalkylthio is a straight-chain or branched alkylthio group having 1 to 8 carbon atoms (as mentioned above), where some or all of the hydrogen atoms in this group may be replaced by halogen atoms as mentioned above, for example C1-C2-haloalkylthio such as chloromethylthio, bromomethylthio, dichloromethylthio, trichloromethylthio, fluoromethylthio, difluoromethylthio, trifluoromethylthio, chlorofluoromethylthio, dichlorofluoromethylthio, chlorodifluoromethylthio, 1-chloroethylthio, 1-bromoethylthio, 1-fluoroethylthio, 2-fluoroethylthio, 2,2-difluoroethylthio, 2,2,2-trifluoroethylthio, 2-chloro-2-fluoroethylthio, 2-chloro-2,2-difluoroethylthio, 2,2-dichloro-2-fluoroethylthio, 2,2,2-trichloroethylthio, pentafluoroethylthio and 1,1,1-trifluoroprop-2-ylthio.
Heteroaryl is 2-furyl, 3-furyl, 2-thienyl, 3-thienyl, 1-pyrrolyl, 2-pyrrolyl, 3-pyrrolyl, 3-isoxazolyl, 4-isoxazolyl, 5-isoxazolyl, 3-isothiazolyl, 4-isothiazolyl, 5-isothiazolyl, 1-pyrazolyl, 3-pyrazolyl, 4-pyrazolyl, 5-pyrazolyl, 2-oxazolyl, 4-oxazolyl, 5-oxazolyl, 2-thiazolyl, 4-thiazolyl, 5-thiazolyl, 1-imidazolyl, 2-imidazolyl, 4-imidazolyl, 5-imidazolyl, 1,2,4-oxadiazol-3-yl, 1,2,4-oxadiazol-5-yl, 1,2,4-thiadiazol-3-yl, 1,2,4-thiadiazol-5-yl, 1,3,4-oxadiazol-2-yl, 1,3,4-thiadiazol-2-yl, 1,2,4-triazol-1-yl, 1,2,4-triazol-3-yl, 1,2,4-triazol-4-yl, 1,2,4-triazol-5-yl, 1,2,3-triazol-1-yl, 1,2,3-triazol-2-yl, 1,2,3-triazol-4-yl, tetrazol-1-yl, tetrazol-2-yl, tetrazol-5-yl, indol-1-yl, indol-2-yl, indol-3-yl, isoindol-1-yl, isoindol-2-yl, benzofur-2-yl, benzothiophen-2-yl, benzofur-3-yl, benzothiophen-3-yl, benzoxazol-2-yl, benzothiazol-2-yl, benzimidazol-2-yl, indazol-1-yl, indazol-2-yl, indazol-3-yl, 2-pyridinyl, 3-pyridinyl, 4-pyridinyl, 3-pyridazinyl, 4-pyridazinyl, 2-pyrimidinyl, 4-pyrimidinyl, 5-pyrimidinyl, 2-pyrazinyl, 1,3,5-triazin-2-yl, 1,2,4-triazin-3-yl, 1,2,4-triazin-5-yl or 1,2,4-triazin-6-yl. This heteroaryl is in each case unsubstituted or mono- or polysubstituted by identical or different radicals selected from the group consisting of fluorine, chlorine, bromine, iodine, cyano, hydroxyl, mercapto, amino, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, cyclopropyl, 1-chlorocyclopropyl, vinyl, ethynyl, methoxy, ethoxy, isopropoxy, methylthio, ethylthio, trifluoromethylthio, chlorodifluoromethyl, dichlorofluoromethyl, chlorofluoromethyl, chloromethyl, dichloromethyl, trichloromethyl, fluoromethyl, difluoromethyl, trifluoromethyl, 2,2,2-trifluorethyl, trifluoromethoxy, trifluoromethylthio, 2,2,2-trifluoroethoxy, 2,2-dichloro-2-fluoroethyl, 2,2-difluoro-2-chloroethyl, 2-chloro-2-fluoroethyl, 2,2,2-trichloroethyl, 2,2,2-trifluoroethyl, 2-fluoroethyl, 2,2-difluoroethyl, 2-methoxyethoxy, acetyl, propionyl, methoxycarbonyl, ethoxycarbonyl, N-methylamino, N,N-dimethylamino, N-ethylamino, N,N-diethylamino, aminocarbonyl, methylaminocarbonyl, dimethylaminocarbonyl, dimethylcarbamoylamino, methoxycarbonylamino, methoxycarbonyloxy, ethoxycarbonylamino, ethoxycarbonyloxy, methylsulfamoyl, dimethylsulfamoyl, phenyl or phenoxy.
Depending inter alia on the nature of the substituents, the compounds of the formula (I) can be present as geometrical and/or optical isomers or isomer mixtures of varying composition which, if appropriate, can be separated in a customary manner. The present invention provides both the pure isomers and the isomer mixtures, their preparation and use and compositions comprising them. However, hereinbelow, for the sake of simplicity, compounds of the formula (I) are always referred to, although this is meant to include both the pure compounds and, if appropriate, mixtures having varying proportions of isomeric compounds.
If a group is polysubstituted by radicals, this is to be understood as meaning that this group is substituted by one or more identical or different radicals from the radicals mentioned.
Preference is given to compounds of the general formula (I) in which
A is hydrogen, (C1-C6)-alkyl, (C3-C6)-cycloalkyl, (C3-C6)-cycloalkyl-(C1-C6)-alkyl, benzyl or halophenyl-(C1-C6)-alkyl;
B is hydrogen, (C1-C6)-alkyl, (C3-C6)-cycloalkyl, (C3-C6)-cycloalkyl-(C1-C6)-alkyl, benzyl or halophenyl-(C1-C6)-alkyl;
n is 0, 1, 2 or 3;
R8 is (C1-C6)-alkyl, (C2-C6)-alkenyl, (C2-C6)-alkynyl substituted by n halogen atoms or is phenyl or phenyl-(C1-C4)-alkyl substituted by n radicals from the group consisting of halogen, (C1-C4)-alkyl and (C1-C4)-alkoxy;
and
a) X is hydrogen, methyl, ethyl or cyclopropyl;
Particular preference is given to compounds of the general formula (I) in which
A is hydrogen, methyl, ethyl, isobutyl, cyclopropyl, cyclopropylmethyl, benzyl, 2-chlorophenylmethyl, 3-chlorophenylmethyl or 4-chlorophenylmethyl;
B is hydrogen, methyl, ethyl, isobutyl, tert-butyl, cyclopropyl, cyclopropylmethyl, benzyl, 2-chlorophenylmethyl, 3-chlorophenylmethyl or 4-chlorophenylmethyl,
n is 0, 1, 2 or 3;
R8 is (C1-C6)-alkyl, (C2-C6)-alkenyl, (C2-C6)-alkynyl or is benzyl substituted by n radicals from the group consisting of halogen, (C1-C4)-alkyl and (C1-C4)-alkoxy;
and
a) X is hydrogen, methyl or ethyl;
Very particular preference is given to the compounds of the general formula (I) listed in Tables 1 to 67 which can be obtained analogously to the methods mentioned here.
The abbreviations used are defined below:
Collections of compounds of the formula (I) and/or their salts which can be synthesized in accordance with the abovementioned reactions can also be prepared in a parallelized manner, which can be effected manually or in a partly or fully automated manner. Here, it is possible for example to automate the procedure of the reaction, the work-up or the purification of the products or intermediates. In total, this is understood as meaning a procedure as described for example by D. Tiebes in Combinatorial Chemistry—Synthesis, Analysis, Screening (Editor Günther Jung), Wiley 1999, on pages 1 to 34.
A number of commercially available apparatuses can be used for the parallelized reaction procedure and work-up, for example Calpyso reaction blocks from Barnstead International, Dubuque, Iowa 52004-0797, USA, or reaction stations from Radleys, Shirehill, Saffron Walden, Essex, CB 11 3AZ, England or MuItiPROBE Automated Workstations from Perkin Elmar, Waltham, Mass. 02451, USA. Chromatographic apparatuses, for example from ISCO, Inc., 4700 Superior Street, Lincoln, Nebr. 68504, USA, are available, inter alia, for the parallelized purification of compounds of the formula (I) and their salts or of intermediates generated in the course of the preparation.
The apparatuses listed lead to a modular procedure in which the individual passes are automated, but manual operations must be carried out between the passes. This can be circumvented by the use of partly or fully integrated automation systems, where the relevant automation modules are operated by, for example, robots. Such automation systems can be obtained for example from Caliper, Hopkinton, Mass. 01748, USA.
The performance of individual, or a plurality of, synthesis steps can be aided by the use of polymer-supported reagents/scavenger resins. The specialist literature describes a series of experimental protocols, for example in ChemFiles, Vol. 4, No. 1, Polymer-Supported Scavengers and Reagents for Solution-Phase Synthesis (Sigma-Aldrich).
Besides the methods described herein, the preparation of compounds of the formula (I) and their salts can be effected fully or in part by solid-phase-supported methods. For this purpose, individual intermediates, or all intermediates, of the synthesis or of a synthesis adapted to the relevant procedure are bound to a synthesis resin. Solid-phase-supported synthesis methods are described sufficiently in the specialist literature, for example Barry A. Bunin in “The Combinatorial Index”, Academic Press, 1998 and Combinatorial Chemistry—Synthesis, Analysis, Screening (Editor Günther Jung), Wiley, 1999. The use of solid-phase-supported synthesis methods permits a series of protocols known from the literature, which, again, can be carried out manually or in an automated manner. For example, the reactions can be carried out by means of IRORI technology in microreactors from Nexus Biosystems, 12140 Community Road, Poway, Calif. 92064, USA.
Carrying out individual or a plurality of synthesis steps, both on a solid and in the liquid phase, can be aided by the use of microwave technology. A series of experimental protocols are described in the specialist literature, for example in Microwaves in Organic and Medicinal Chemistry (Editors C. O. Kappe and A. Stadler), Wiley, 2005.
The preparation in accordance with the processes described herein generates compounds of the formula (I) and their salts in the form of substance collections, which are referred to as libraries. The present invention also relates to libraries which comprise at least two compounds of the formula (I) and their salts.
The compounds of the formula (I) according to the invention (and/or their salts), hereinbelow together referred to as “compounds according to the invention”, have an outstanding herbicidal activity against a broad spectrum of economically important monocotyledonous and dicotyledonous annual harmful plants. The active substances also act efficiently on perennial harmful plants which produce shoots from rhizomes, rootstocks or other perennial organs and which are difficult to control.
The present invention therefore also relates to a method of controlling unwanted plants or for regulating the growth of plants, preferably in crops of plants, where one or more compound(s) according to the invention is/are applied to the plants (for example harmful plants such as monocotyledonous or dicotyledonous weeds or undesired crop plants), to the seeds (for example grains, seeds or vegetative propagules such as tubers or shoot parts with buds) or to the area on which the plants grow (for example the area under cultivation). In this context, the compounds according to the invention can be applied for example pre-planting (if appropriate also by incorporation into the soil), pre-emergence or post-emergence. Examples of individual representatives of the monocotyledonous and dicotyledonous weed flora which can be controlled by the compounds according to the invention shall be mentioned, without the mention being intended as a limitation to certain species.
Monocotyledonous harmful plants 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, lschaemum, Leptochloa, Lolium, Monochoria, Panicum, Paspalum, Phalaris, Phleum, Poa, Rottboellia, Sagittaria, Scirpus, Setaria, Sorghum.
Dicotyledonous weeds of the genera: Abutilon, Amaranthus, Ambrosia, Anoda, Anthemis, Aphanes, Artemisia, Atriplex, Bellis, Bidens, Capsella, Carduus, Cassia, Centaurea, Chenopodium, Cirsium, Convolvulus, Datura, Desmodium, Emex, Erysimum, Euphorbia, Galeopsis, Galinsoga, Galium, Hibiscus, Ipomoea, Kochia, Lamium, Lepidium, Lindernia, 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.
If the compounds according to the invention are applied to the soil surface before germination, either the emergence of the weed seedlings is prevented completely or the weeds grow until they have reached the cotyledon stage, but then stop their growth and, finally, die completely after three to four weeks have elapsed.
When the active substances are applied post-emergence to the green plant parts, growth stops after the treatment, and the harmful plants remain in the growth stage of the time of application or die fully after a certain period of time, so that competition by weeds, which is harmful to the crop plants, is thus eliminated at an early point in time and in a sustained manner.
Although the compounds according to the invention display an outstanding herbicidal activity against monocotyledonous and dicotyledonous weeds, crop plants of economically important crops, for example dicotyledonous crops of the genera Arachis, Beta, Brassica, Cucumis, Cucurbita, Helianthus, Daucus, Glycine, Gossypium, Ipomoea, Lactuca, Linum, Lycopersicon, Nicotiana, Phaseolus, Pisum, Solanum, Vicia, or monocotyledonous crops of the genera Allium, Ananas, Asparagus, Avena, Hordeum, Oryza, Panicum, Saccharum, Secale, Sorghum, Triticale, Triticum, Zea, in particular Zea and Triticum, are damaged only to an insignificant extent, or not at all, depending on the structure of the respective compound according to the invention and its application rate. This is why the present compounds are highly suitable for the selective control of undesired plant growth in plant crops such as agriculturally useful plants or ornamentals.
Moreover, the compounds according to the invention (depending on their respective structure and the application rate applied) have outstanding growth-regulatory properties in crop plants. They engage in the plant metabolism in a regulatory fashion and can therefore be employed for the influencing, in a targeted manner, of plant constituents and for facilitating harvesting, such as, for example, by triggering desiccation and stunted growth. Moreover, they are also suitable for generally controlling and inhibiting undesired vegetative growth without destroying the plants in the process. Inhibiting the vegetative growth plays an important role in many monocotyledonous and dicotyledonous crops since for example lodging can be reduced, or prevented completely, hereby.
Owing to their herbicidal and plant-growth-regulatory properties, the active substances can also be employed for controlling harmful plants in crops of genetically modified plants or plants which have been modified by conventional mutagenesis. As a rule, the transgenic plants are distinguished by especially advantageous properties, for example by resistances to certain pesticides, mainly certain herbicides, resistances to plant diseases or causative organisms of plant diseases, such as certain insects or microorganisms such as fungi, bacteria or viruses. Other special properties relate for example to the harvested material with regard to quantity, quality, storability, composition and specific constituents. Thus, transgenic plants with an increased starch content or a modified starch quality or those with a different fatty acid composition of the harvested material are known.
It is preferred to use the compounds according to the invention or their salts in economically important transgenic crops of useful plants and ornamentals, for example of cereals such as wheat, barley, rye, oats, sorghum and millet, rice, cassava and corn or else crops of sugar beet, cotton, soybean, oil seed rape, potato, tomato, peas and other vegetables. It is preferred to employ the compounds according to the invention as herbicides in crops of useful plants which are resistant, or have been made resistant by recombinant means, to the phytotoxic effects of the herbicides.
Conventional ways of generating novel plants which, in comparison with existing plants, have modified properties are, for example, traditional breeding methods and the generation of mutants. Alternatively, novel plants with modified properties can be generated with the aid of recombinant methods (see, for example, EP-A-0221044, EP-A-0131624). For example, the following have been described in several cases:
A large number of molecular-biological techniques by means of which novel transgenic plants with modified properties can be generated are known in principle; see, for example, I. Potrykus and G. Spangenberg (eds.) Gene Transfer to Plants, Springer Lab Manual (1995), Springer Verlag Berlin, Heidelberg. or Christou, “Trends in Plant Science” 1 (1996) 423-431).
To carry out such recombinant manipulations, it is possible to introduce nucleic acid molecules into plasmids, which permit a mutagenesis or sequence modification by recombination of DNA sequences. For example, base substitutions can be carried out, part-sequences can be removed, or natural or synthetic sequences may be added with the aid of standard methods. To link the DNA fragments with one another, it is possible to add adapters or linkers to the fragments; see, for example, Sambrook et al., 1989, Molecular Cloning, A Laboratory Manual, 2nd ed., Cold Spring Harbor Laboratory Press, Cold Spring Harbor, N.Y.; or Winnacker “Gene and Klone”, VCH Weinheim 2nd ed., 1996
The generation of plant cells with a reduced activity for a gene product can be achieved for example by the expression of at least one corresponding antisense RNA, a sense RNA for achieving a cosuppression effect or by the expression of at least one correspondingly constructed ribozyme, which specifically cleaves transcripts of the abovementioned gene product.
To this end, it is possible firstly to use DNA molecules which comprise all of the coding sequence of a gene product, including any flanking sequences which may be present, or else DNA molecules which only comprise parts of the coding sequence, it being necessary for these parts to be long enough to bring about an antisense effect in the cells. It is also possible to use DNA sequences which have a high degree of homology with the coding sequences of a gene product, but which are not entirely identical.
When expressing nucleic acid molecules in plants, the protein synthesized may be localized in any compartment of the plant cell. In order to achieve localization in a particular compartment, however, it is possible for example to link the coding region to DNA sequences which ensure the localization in a specific compartment. Such sequences are known to the skilled worker (see, for example, Braun et al., EMBO J. 11 (1992), 3219-3227; Wolter et al., Proc. Natl. Acad. Sci. USA 85 (1988), 846-850; Sonnewald et al., Plant J. 1 (1991), 95-106). The nucleic acid molecules can also be expressed in the organelles of the plant cells.
The transgenic plant cells can be regenerated by known techniques to give intact plants. In principle, the transgenic plants may be plants of any plant species, that is to say both monocotyledonous and dicotyledonous plants.
Thus, transgenic plants can be obtained which feature modified properties as the result of overexpression, suppression or inhibition of homologous (=natural) genes or gene sequences or expression of heterologous (=foreign) genes or gene sequences.
It is preferred to employ the compounds according to the invention in transgenic crops which are resistant to growth regulators such as, for example, dicamba, or against herbicides which inhibit essential plant enzymes, for example acetolactate synthases (ALS), EPSP synthases, glutamine synthases (GS) or hydroxyphenylpyruvate dioxygenases (HPPD), or against herbicides from the group of the sulfonylureas, glyphosate, glufosinate or benzoylisoxazoles and analogous active substances.
When the active substances according to the invention are used in transgenic crops, effects are frequently observed—in addition to the effects on harmful plants which can be observed in other crops—which are specific for the application in the transgenic crop in question, for example a modified or specifically widened spectrum of weeds which can be controlled, modified application rates which may be employed for application, preferably good combinability with the herbicides to which the transgenic crop is resistant, and an effect on growth and yield of the transgenic crop plants.
The invention therefore also relates to the use of the compounds according to the invention as herbicides for controlling harmful plants in transgenic crop plants.
The compounds according to the invention can be used in the form of wettable powders, emulsifiable concentrates, sprayable solutions, dusting products or granules in the customary formulations. The invention therefore also provides herbicidal and plant growth-regulating compositions which comprise the compounds according to the invention.
The compounds according to the invention can be formulated in various ways according to which biological and/or physicochemical parameters are required. Possible formulations include, for example: wettable powders (WP), water-soluble powders (SP), water-soluble concentrates, emulsifiable concentrates (EC), emulsions (EW) such as oil-in-water and water-in-oil emulsions, sprayable solutions, suspension concentrates (SC), oil- or water-based dispersions, oil-miscible solutions, capsule suspensions (CS), dusting products (DP), seed-dressing products, granules for scattering and soil application, granules (GR) in the form of microgranules, spray granules, coated granules and adsorption granules, water-dispersible granules (WG), water-soluble granules (SG), ULV formulations, microcapsules and waxes. These individual formulation types are known in principle and are described, for example, in: Winnacker-Küchler, “Chemische Technologie” [Chemical technology], Volume 7, C. Hanser Verlag Munich, 4th Ed. 1986, Wade van Valkenburg, “Pesticide Formulations”, Marcel Dekker, N.Y., 1973; K. Martens, “Spray Drying” Handbook, 3rd Ed. 1979, G. Goodwin Ltd. London.
The necessary formulation assistants, such as inert materials, surfactants, solvents and further additives, are likewise known and are described, for example, in: Watkins, “Handbook of Insecticide Dust Diluents and Carriers”, 2nd Ed., Darland Books, Caldwell N.J., H. v. Olphen, “Introduction to Clay Colloid Chemistry”; 2nd Ed., J. Wiley & Sons, N.Y.; C. Marsden, “Solvents Guide”; 2nd Ed., Interscience, N.Y. 1963; McCutcheon's “Detergents and Emulsifiers Annual”, MC Publ. Corp., Ridgewood N.J.; Sisley and Wood, “Encyclopedia of Surface Active Agents”, Chem. Publ. Co. Inc., N.Y. 1964; Schönfeldt, “Grenzflächenaktive Äthylenoxidaddukte” [Interface-active ethylene oxide adducts], Wiss. Verlagsgesell., Stuttgart 1976; Winnacker-Küchler, “Chemische Technologie”, Volume 7, C. Hanser Verlag Munich, 4th Ed. 1986.
Wettable powders are preparations which can be dispersed uniformly in water and, as well as the active compound, apart from a diluent or inert substance, also comprise surfactants of the ionic and/or nonionic type (wetting agents, dispersants), for example polyoxyethylated alkylphenols, polyoxyethylated fatty alcohols, polyoxyethylated fatty amines, fatty alcohol polyglycol ether sulfates, alkanesulfonates, alkylbenzenesulfonates, sodium lignosulfonate, sodium 2,2′-dinaphthylmethane-6,6′-disulfonate, sodium dibutylnaphthalenesulfonate or else sodium oleylmethyltauride. To prepare the wettable powders, the active herbicidal ingredients are ground finely, for example in customary apparatus such as hammer mills, blower mills and air-jet mills and simultaneously or subsequently mixed with the formulation assistants.
Emulsifiable concentrates are prepared by dissolving the active compound in an organic solvent, for example butanol, cyclohexanone, dimethylformamide, xylene or else relatively high-boiling aromatics or hydrocarbons or mixtures of the organic solvents with addition of one or more surfactants of the ionic and/or nonionic type (emulsifiers). The emulsifiers used may, for example, be: calcium alkylarylsulfonates such as calcium dodecylbenzenesulfonate, or nonionic emulsifiers such as fatty acid polyglycol esters, alkylaryl polyglycol ethers, fatty alcohol polyglycol ethers, propylene oxide-ethylene oxide condensation products, alkyl polyethers, sorbitan esters, for example sorbitan fatty acid esters, or polyoxyethylene sorbitan esters, for example polyoxyethylene sorbitan fatty acid esters.
Dusting products are obtained by grinding the active compound with finely divided solid substances, for example talc, natural clays such as kaolin, bentonite and pyrophyllite, or diatomaceous earth.
Suspension concentrates may be water- or oil-based. They may be prepared, for example, by wet grinding by means of commercial bead mills and optional addition of surfactants as have, for example, already been listed above for the other formulation types.
Emulsions, for example oil-in-water emulsions (EW), can be prepared, for example, by means of stirrers, colloid mills and/or static mixers using aqueous organic solvents and optionally surfactants, as have, for example, already been listed above for the other formulation types.
Granules can be produced either by spraying the active compound onto adsorptive granulated inert material or by applying active compound concentrates by means of adhesives, for example polyvinyl alcohol, sodium polyacrylate or else mineral oils, onto the surface of carriers such as sand, kaolinites or of granulated inert material. It is also possible to granulate suitable active compounds in the manner customary for the production of fertilizer granules—if desired in a mixture with fertilizers.
Water-dispersible granules are prepared generally by the customary processes such as spray-drying, fluidized bed granulation, pan granulation, mixing with high-speed mixers and extrusion without solid inert material.
For the preparation of pan, fluidized bed, extruder and spray granules, see, for example, processes in “Spray-Drying Handbook” 3rd ed. 1979, G. Goodwin Ltd., London; J. E. Browning, “Agglomeration”, Chemical and Engineering 1967, pages 147 ff; “Perry's Chemical Engineer's Handbook”, 5th Ed., McGraw-Hill, New York
For further details regarding the formulation of crop protection compositions, see, for example, G. C. Klingman, “Weed Control as a Science”, John Wiley and Sons, Inc., New York, 1961, pages 81-96 and J. D. Freyer, S. A. Evans, “Weed Control Handbook”, 5th Ed., Blackwell Scientific Publications, Oxford, 1968, pages 101-103.
The agrochemical formulations contain generally from 0.1 to 99% by weight, in particular from 0.1 to 95% by weight, of active compound of the formula (I). In wettable powders, the active compound concentration is, for example, from about 10 to 90% by weight; the remainder to 100% by weight consists of customary formulation constituents. In the case of emulsifiable concentrates, the active compound concentration may be from about 1 to 90% by weight, preferably from 5 to 80% by weight. Dust-type formulations contain from 1 to 30% by weight of active compound, preferably usually from 5 to 20% by weight of active compound; sprayable solutions contain from about 0.05 to 80% by weight, preferably from 2 to 50% by weight of active compound. In water-dispersible granules, the active compound content depends partly on whether the active compound is present in solid or liquid form and which granulation assistants, fillers, etc. are used. In the granules dispersible in water, the content of active compound is, for example, between 1 and 95% by weight, preferably between 10 and 80% by weight.
In addition, the active compound formulations mentioned optionally comprise the respective customary adhesives, wetting agents, dispersants, emulsifiers, penetrants, preservatives, antifreeze agents and solvents, fillers, carriers and dyes, defoamers, evaporation inhibitors and agents which influence the pH and the viscosity.
Based on these formulations, it is also possible to prepare combinations with other pesticidally active compounds, such as, for example, insecticides, acaricides, herbicides, fungicides, and also with safeners, fertilizers and/or growth regulators, for example in the form of a finished formulation or as a tank mix. Suitable safeners are, for example, mefenpyr-diethyl, cyprosulfamide, isoxadifen-ethyl, cloquintocet-mexyl and dichlormid.
Active compounds which can be employed in combination with the compounds according to the invention in mixed formulations or in the tank mix are, for example, known active compounds which are based on the inhibition of, for example, acetolactate synthase, acetyl-CoA carboxylase, cellulose synthase, enolpyruvylshikimate-3-phosphate synthase, glutamine synthetase, p-hydroxyphenylpyruvate dioxygenase, phytoene desaturase, photosystem I, photosystem II, protoporphyrinogen oxidase, as are described in, for example, Weed Research 26 (1986) 441-445 or “The Pesticide Manual”, 14th edition, The British Crop Protection Council and the Royal Soc. of Chemistry, 2003 and the literature cited therein. Known herbicides or plant growth regulators which can be combined with the compounds according to the invention are, for example, the following active substances (the compounds are either designated by the common name according to the International Organization for Standardization (ISO) or by a chemical name, if appropriate together with the code number) and always comprise all use forms such as acids, salts, esters and isomers such as stereoisomers and optical isomers. In this context, one and in some cases also several use forms are mentioned by way of example:
acetochlor, acibenzolar, acibenzolar-S-methyl, acifluorfen, acifluorfen-sodium, aclonifen, alachlor, allidochlor, alloxydim, alloxydim-sodium, ametryne, amicarbazone, amidochlor, amidosulfuron, aminocyclopyrachlor, aminopyralid, amitrole, ammonium sulfamate, ancymidol, anilofos, asulam, atrazine, azafenidin, azimsulfuron, aziprotryne, BAH-043, BAS-140H, BAS-693H, BAS-714H, BAS-762H, BAS-776H, BAS-800H, beflubutamid, benazolin, benazolin-ethyl, bencarbazone, benfluralin, benfuresate, bensulide, bensulfuron-methyl, bentazone, benzfendizone, benzobicyclon, benzofenap, benzofluor, benzoylprop, bifenox, bilanafos, bilanafos-sodium, bispyribac, bispyribac-sodium, bromacil, bromobutide, bromofenoxim, bromoxynil, bromuron, buminafos, busoxinone, butachlor, butafenacil, butamifos, butenachlor, butralin, butroxydim, butylate, cafenstrole, carbetamide, carfentrazone, carfentrazone-ethyl, chlomethoxyfen, chloramben, chlorazifop, chlorazifop-butyl, chlorbromuron, chlorbufam, chlorfenac, chlorfenac-sodium, chlorfenprop, chlorflurenol, chlorflurenol-methyl, chloridazon, chlorimuron, chlorimuron-ethyl, chlormequat-chloride, chlornitrofen, chlorophthalim, chlorthal-dimethyl, chlorotoluron, chlorsulfuron, cinidon, cinidon-ethyl, cinmethylin, cinosulfuron, clethodim, clodinafop, clodinafop-propargyl, clofencet, clomazone, clomeprop, cloprop, clopyralid, cloransulam, cloransulam-methyl, cumyluron, cyanamide, cyanazine, cyclanilide, cycloate, cyclosulfamuron, cycloxydim, cycluron, cyhalofop, cyhalofop-butyl, cyperquat, cyprazine, cyprazole, 2,4-D, 2,4-DB, daimuron/dymron, dalapon, daminozide, dazomet, n-decanol, desmedipham, desmetryn, detosyl-pyrazolate (DTP), diallate, dicamba, dichlobenil, dichlorprop, dichlorprop-P, diclofop, diclofop-methyl, diclofop-P-methyl, diclosulam, diethatyl, diethatyl-ethyl, difenoxuron, difenzoquat, diflufenican, diflufenzopyr, diflufenzopyr-sodium, dimefuron, dikegulac-sodium, dimefuron, dimepiperate, dimethachlor, dimethametryn, dimethenamid, dimethenamid-P, dimethipin, dimetrasulfuron, dinitramine, dinoseb, dinoterb, diphenamid, dipropetryn, diquat, diquat-dibromide, dithiopyr, diuron, DNOC, eglinazine-ethyl, endothal, EPTC, esprocarb, ethalfluralin, ethametsulfuron-methyl, ethephon, ethidimuron, ethiozin, ethofumesate, ethoxyfen, ethoxyfen-ethyl, ethoxysulfuron, etobenzanid, F-5331, i.e. N-[2-chloro-4-fluoro-5-[4-(3-fluoropropyl)-4,5-dihydro-5-oxo-1H-tetrazol-1-yl]phenyl]ethanesulfonamide, fenoprop, fenoxaprop, fenoxaprop-P, fenoxaprop-ethyl, fenoxaprop-P-ethyl, fentrazamide, fenuron, flamprop, flamprop-M-isopropyl, flamprop-M-methyl, flazasulfuron, florasulam, fluazifop, fluazifop-P, fluazifop-butyl, fluazifop-P-butyl, fluazolate, flucarbazone, flucarbazone-sodium, flucetosulfuron, fluchloralin, flufenacet (thiafluamide), flufenpyr, flufenpyr-ethyl, flumetralin, flumetsulam, flumiclorac, flumiclorac-pentyl, flumioxazin, flumipropyn, fluometuron, fluorodifen, fluoroglycofen, fluoroglycofen-ethyl, flupoxam, flupropacil, flupropanate, flupyrsulfuron, flupyrsulfuron-methyl-sodium, flurenol, flurenol-butyl, fluridone, fluorochloridone, fluoroxypyr, fluoroxypyr-meptyl, flurprimidol, flurtamone, fluthiacet, fluthiacet-methyl, fluthiamide, fomesafen, foramsulfuron, forchlorfenuron, fosamine, furyloxyfen, gibberellic acid, glufosinate, L-glufosinate, L-glufosinate-ammonium, glufosinate-ammonium, glyphosate, glyphosate-isopropylammonium, H-9201, halosafen, halosulfuron, halosulfuron-methyl, haloxyfop, haloxyfop-P, haloxyfop-ethoxyethyl, haloxyfop-P-ethoxyethyl, haloxyfop-methyl, haloxyfop-P-methyl, hexazinone, HNPC-9908, HOK-201, HW-02, imazamethabenz, imazamethabenz-methyl, imazamox, imazapic, imazapyr, imazaquin, imazethapyr, imazosulfuron, inabenfide, indanofan, indoleacetic acid (IAA), 4-indol-3-ylbutyric acid (IBA), iodosulfuron, iodosulfuron-methyl-sodium, ioxynil, isocarbamid, isopropalin, isoproturon, isouron, isoxaben, isoxachlortole, isoxaflutole, isoxapyrifop, KUH-043, KUH-071, karbutilate, ketospiradox, lactofen, lenacil, linuron, maleic hydrazide, MCPA, MCPB, MCPB-methyl, -ethyl and -sodium, mecoprop, mecoprop-sodium, mecoprop-butotyl, mecoprop-P-butotyl, mecoprop-P-dimethylammonium, mecoprop-P-2-ethylhexyl, mecoprop-P-potassium, mefenacet, mefluidide, mepiquat-chloride, mesosulfuron, mesosulfuron-methyl, mesotrione, methabenzthiazuron, metam, metamifop, metamitron, metazachlor, methazole, methoxyphenone, methyldymron, 1-methylcyclopropene, methyl isothiocyanate, metobenzuron, metobenzuron, metobromuron, metolachlor, S-metolachlor, metosulam, metoxuron, metribuzin, metsulfuron, metsulfuron-methyl, molinate, monalide, monocarbamide, monocarbamide dihydrogen sulfate, monolinuron, monosulfuron, monuron, MT 128, MT-5950, i.e. N-[3-chloro-4-(1-methylethyl)phenyl]-2-methylpentanamide, NGGC-011, naproanilide, napropamide, naptalam, NC-310, i.e. 4-(2,4-dichlorobenzoyl)-1-methyl-5-benzyloxypyrazole, NC-620, neburon, nicosulfuron, nipyraclofen, nitralin, nitrofen, nitrophenolat-sodium (isomer mixture), nitrofluorfen, nonanoic acid, norflurazon, orbencarb, orthosulfamuron, oryzalin, oxadiargyl, oxadiazon, oxasulfuron, oxaziclomefone, oxyfluorfen, paclobutrazole, paraquat, paraquat dichloride, pelargonic acid (nonanoic acid), pendimethalin, pendralin, penoxsulam, pentanochlor, pentoxazone, perfluidone, pethoxamid, phenisopham, phenmedipham, phenmedipham-ethyl, picloram, picolinafen, pinoxaden, piperophos, pirifenop, pirifenop-butyl, pretilachlor, primisulfuron, primisulfuron-methyl, probenazole, profluazol, procyazine, prodiamine, prifluraline, profoxydim, prohexadione, prohexadione-calcium, prohydrojasmone, prometon, prometryn, propachlor, propanil, propaquizafop, propazine, propham, propisochlor, propoxycarbazone, propoxycarbazone-sodium, propyzamide, prosulfalin, prosulfocarb, prosulfuron, prynachlor, pyraclonil, pyraflufen, pyraflufen-ethyl, pyrasulfotole, pyrazolynate (pyrazolate), pyrazosulfuron-ethyl, pyrazoxyfen, pyribambenz, pyribambenz-isopropyl, pyribenzoxim, pyributicarb, pyridafol, pyridate, pyriftalid, pyriminobac, pyriminobac-methyl, pyrimisulfan, pyrithiobac, pyrithiobac-sodium, pyroxasulfone, pyroxsulam, quinclorac, quinmerac, quinoclamine, quizalofop, quizalofop-ethyl, quizalofop-P, quizalofop-P-ethyl, quizalofop-P-tefuryl, rimsulfuron, saflufenacil, secbumeton, sethoxydim, siduron, simazine, simetryn, SN-106279, sulcotrione, sulf-allate (CDEC), sulfentrazone, sulfometuron, sulfometuron-methyl, sulfosate (glyphosate-trimesium), sulfosulfuron, SYN-523, SYP-249, SYP-298, SYP-300, tebutam, tebuthiuron, tecnazene, tefuryltrione, tembotrione, tepraloxydim, terbacil, terbucarb, terbuchlor, terbumeton, terbuthylazine, terbutryne, TH-547, i.e. propyrisulfuron, thenylchlor, thiafluamide, thiazafluoron, thiazopyr, thidiazimin, thidiazuron, thiencarbazone, thiencarbazone-methyl, thifensulfuron, thifensulfuron-methyl, thiobencarb, tiocarbazil, topramezone, tralkoxydim, triallate, triasulfuron, triaziflam, triazofenamide, tribenuron, tribenuron-methyl, trichloroacetic acid (TCA), triclopyr, tridiphane, trietazine, trifloxysulfuron, trifloxysulfuron-sodium, trifluralin, triflusulfuron, triflusulfuron-methyl, trimeturon, trinexapac, trinexapac-ethyl, tritosulfuron, tsitodef, uniconazole, uniconazole-P, vernolate, ZJ-0166, ZJ-0270, ZJ-0543, ZJ-0862 and also the following compounds:
For use, the formulations in commercial form are, if appropriate, diluted in a customary manner, for example in the case of wettable powders, dispersions and water-dispersable granules with water. Preparations in the form of dusts, granules for soil application or granules for broadcasting and sprayable solutions are usually not diluted with other inert substances prior to application.
The application rate of the compounds of the formula (I) varies according to the external conditions such as, inter alia, temperature, humidity and the type of herbicide used. It may vary within wide limits, for example between 0.001 and 1.0 kg/ha or more of active substance; however, preferably is it between 0.005 and 750 g/ha.
In addition to the herbicidal action, the compounds according to the invention also have good insecticidal action. Accordingly, the invention also relates to their use as insecticides.
The examples below serve to illustrate the invention.
1.1 g of 4-(3,4-dichlorophenyl)-5-methoxy-2-methyl-2H-pyridazin-3-one (A), 1.15 g of 3,4-dichlorophenylboronic acid and 0.14 g of tetrakisphenlyphosphine palladium were dissolved in 40 ml of toluene, 7 ml of 2M sodium carbonate solution were added and the mixture was then heated at the boil under reflux until no more A was present when the reaction was checked. The aqueous phase was then separated off and extracted with dichloromethane, the organic phases were combined and concentrated and the resulting solid was stirred with cyclohexane. This gave 0.99 g.
The compounds of Table 36 can be obtained analogously to the methods mentioned above.
At 0° C., 1.0 eq of sodium hydride (60%) was added to 0.15 g of 4-(2,4-dichloro-6-methylphenyl)-2,6-dimethyl-5-hydroxy-3(2H)-pyridazinone in 10 ml of tetrahydrofuran, and the mixture was stirred at 0° C. for 30 min. Cooling was removed and 1.2 eq of propargyl bromide were added a little at a time and the mixture was heated at 50° C. for 96 h. Water was then added, and the resulting mixture was extracted twice with ethyl acetate. The combined organic phases were dried with sodium sulfate and then purified chromatographically (silica gel, gradient n-heptane/ethyl acetate). This gave 0.1 g (57% of theory) of pure product.
1H-NMR, 400 MHz, CDCl3,
1H-NMR, 400 MHz, d6-
1H-NMR, 400 MHz, CDCl3,
1H-NMR, 400 MHz, d6-
1H-NMR, 400 MHz, CDCl3,
1H-NMR (400 MHz,
1H-NMR, 400 MHz, DMSO,
1H-NMR, 400 MHz, DMSO,
1H-NMR, 400 MHz, CDCl3,
1H-NMR, 400 MHz, CDCl3,
1H-NMR, 400 MHz, CDCl3,
1H-NMR, 400 MHz, CDCl3,
1H-NMR, 400 MHz, CDCl3,
1H-NMR, 400 MHz, CDCl3,
3.5 g (10.1 mmol) of ethyl 2-{[2-(2,4-dichloro-6-ethylphenyl)acetyl]methylhydrazono}-propionate were dissolved in 60 ml of DMF and, at <0° C., added dropwise over a period of 2 h to a solution of 2.3 g (2 eq) of potassium t-butoxide. The mixture was allowed to warm to RT (room temperature) and stirred for another 30 min. The reaction solution was then poured into 250 ml of ice-water and the pH was adjusted to 1-2 using 1N hydrochloric acid. The oily phase formed was separated off and taken up in 300 ml of ethyl acetate, washed with 50 ml of saturated sodium chloride solution and dried with sodium sulfate. The solvent was removed under reduced pressure and taken up in 10 ml of ethyl acetate/n-heptane (4:1). The solid formed was isolated. This gave 1.1 g of pure product.
In parallel, in each case 18 ml of water/ethanediol (1:1) were added to 1.2 g (7.4 mmol) of 4-(3-bromo-2,6-dimethylphenyl)-5-methoxy-2-methyl-2H-pyridazin-3-one and 1.4 g of potassium hydroxide (6.5 eq) and reacted in a microwave at 150° C. for 2 h. Both reaction mixtures were combined and added to 100 ml of water and then extracted with 50 ml of ethyl acetate. The organic phase was removed and the aqueous phase was then adjusted to pH 1 using 1N hydrochloric acid and stirred at RT for 20 min. The precipitate formed was filtered off, giving 1.5 g of pure product.
The following compounds were prepared analogously to Examples 1 and 2 mentioned above.
1H-NMR (400 MHz, d6-DMSO, shift in
1H-NMR (400 MHz, d6-DMSO, shift in
1H-NMR, 400 MHz, d6-DMSO, 10.5
1H-NMR,400 MHz, d6-DMSO, 11.0
1H-NMR, 400 MHz, d6-DMSO, 10.55
1H-NMR (400 MHz, DMSO-d6): 7.67
1H-NMR, 400 MHz, d6-DMSO, 10.5
1H-NMR, 400 MHz, d6-DMSO, 10.5
1H-NMR, 400 MHz, d6-DMSO, 10.4
1H-NMR, 400 MHz, d6-DMSO, 7.51
1H-NMR, 400 MHz, d6-DMSO, 10.4
2.1 g of methyl pyruvate were added to 2.2 g of 1-(2,4-dichloro-6-methylphenylacetic acid) 1-methylhydrazide, and the mixture was dissolved in 20 ml of ethanol. The reaction mixture was heated at the boil under reflux for 2 h and then concentrated under reduced pressure and purified by column chromatography (silica gel, mobile phase cyclohexane/ethyl acetate 4:1). This gave 2.0 g of methyl 2-{[2-(2,4-dichloro-6-methylphenyl)acetyl]methylhydrazono}propionate.
1H-NMR, 400 MHz, d6-DMSO: 7.42 (d, 1H), 7.31 (d, 1H), 4.05 (s, 2H), 3.78 (s, 3H), 2.29 (s, 3H), 2.24 (s, 3H).
0.42 g (8.7 mmol) of methylhydrazine, together with 1.3 ml (1.0 eq) of triethylamine and 0.05 g of DMAP (0.05 eq), was initially charged in 50 ml of dichloromethane. At 0° C., 2,4-dichloro-6-methylphenylacetyl chloride, freshly prepared from 2.2 g of 2,4-dichloro-6-methylphenylacetic acid and 1.4 g of oxalyl chloride, was slowly added dropwise in 30 ml of dichloromethane. The mixture was then heated at the boil under reflux until the evolution of gas had ceased, and ammonium chloride solution was added. The organic phase was separated off, dried and concentrated. This gave 2.2 g of 1-(2,4-dichloro-6-methylphenylacetic acid) 1-methylhydrazide in the form of a brownish solid.
1H-NMR, 400 MHz, d6-DMSO: 7.38 (d, 1H), 7.25 (d, 1H), 4.88 (s, 2H), 4.03 (s, 2H), 3.02 (s, 3H), 2.19 (s, 3H)
1.3 g of methyl pyruvate were added to 3.36 g of 1-(2,4-dichloro-6-ethylphenylacetic acid) 1-methylhydrazide, and the mixture was dissolved in 40 ml of methanol. The mixture was heated at the boil under reflux for 4 h and allowed to stand overnight. The solid formed was filtered off with suction and washed with 5 ml of methanol. This gave 1.5 g of methyl 2-{[2-(2,4-dichloro-6-methylphenyl)acetyl]-methylhydrazono}propionate
1H-NMR, 400 MHz, CDCl3: 7.27 (d, 1H), 7.12 (d, 1H), 4.12 (s, 2H), 3.88 (s, 3H), 2.62 (m, 2H), 2.33 (s, 3H), 1.20 (t, 3H).
0.4 g (8.6 mmol) of methylhydrazine, together with 1.2 ml (1.0 eq) of triethylamine and 0.05 g of DMAP (0.05 eq), was initially charged in 30 ml of dichloromethane. At 0° C., 2,4-dichloro-6-ethylphenylacetyl chloride, freshly prepared from 2.2 g of 2,4-dichloro-6-ethylphenylacetic acid and 1.4 g of oxalyl chloride, was slowly added dropwise in 30 ml of dichloromethane. The mixture was then stirred at room temperature for 1 h, and ammonium chloride solution was added. The organic phase was separated off, dried and concentrated. This gave, after chromatographic purification (silica gel, gradient ethyl acetate/n-heptane), 1.87 g of 1-(2,4-dichloro-6-ethylphenylacetic acid) 1-methylhydrazide.
1H-NMR, 400 MHz, d6-DMSO: 7.38 (d, 1H), 7.24 (d, 1H), 4.90 (s, 2H), 4.02 (s, 2H), 3.02 (s, 3H), 2.58 (m, 2H), 1.11 (t, 3H).
Seeds of monocotyledonous or dicotyledonous weeds or crop plants are placed in sandy loam soil in wood-fiber pots and covered with soil. The compounds according to the invention, formulated in the form of wettable powders (WP) or emulsion concentrates (EC), are then applied to the surface of the soil cover in the form of an aqueous suspension or emulsion at a water application rate of 600 to 800 I/ha (converted), with addition of 0.2% wetting agent. After the treatment, the pots are placed in the greenhouse and kept under good growth conditions for the test plants. The damage to the test plants is scored visually in comparison with untreated controls after an experimental time of 3 weeks has elapsed (herbicidal activity in percent (%): 100% activity=plants have died, 0% activity=like control plants). Here, for example, the compounds Nos. I-1-h-7 and I I-1-h-8 show, at an application rate of 320 g/ha, each at least 80% activity against Amaranthus retroflexus, Matricaria inodora, Fallopia convolvulus, Stellaria media, Veronica persica and Viola tricolor.
Seeds of monocotyledonous or dicotyledonous weeds or crop plants are placed in sandy loam soil in wood-fiber pots, covered with soil and grown in the greenhouse under good growth conditions. 2 to 3 weeks after sowing, the test plants are treated in the one-leaf stage. The compounds according to the invention, formulated in the form of wettable powders (WP) or emulsion concentrates (EC), are then sprayed onto the green plant parts in the form of an aqueous suspension or emulsion at a water application rate of 600 to 800 I/ha (converted), with addition of 0.2% wetter. After the test plants have been left to stand under optimal growth conditions in the greenhouse for approximately 3 weeks, the activity of the preparations is scored visually in comparison with untreated controls (herbicidal activity in percent (%): 100% activity=plants have died, 0% activity=like control plants). Here, for example the compounds I-1-h-7 and I-1-h-10 each show, at an application rate of 80 g/ha, at least 80% activity against Abutilon theophrasti and Fallopia convolvulus Setaria viridis. The compounds 19 in Table 33 and No. 3 in Table 35 each show, at an application rate of 80 g/ha, at least 80% activity against Abutilon theophrasti and Veronica persica.
To produce a suitable preparation of active compound, 1 part by weight of active compound is mixed with the stated amounts of solvents and emulsifier, and the concentrate is diluted with emulsifier-containing water to the desired concentration. Discs of Chinese cabbage (Brassica pekinensis) which are infested by all stages of the green peach aphid (Myzus persicae) are sprayed with an active compound preparation of the desired concentration. After the desired period of time, the effect in % is determined. 100% means that all aphids have been killed; 0% means that none of the aphids have been killed. In this test, for example, the compounds Nos. I-1-a-4 and I-1-a-8 show, at an application rate of 500 g/ha, at least 80% activity.
To produce a suitable preparation of active compound, 1 part by weight of active compound is mixed with the stated amounts of solvents and emulsifier, and the concentrate is diluted with emulsifier-containing water to the desired concentration. Discs of corn leaves (Zea mays) are sprayed with an active compound preparation of the desired concentration and, after drying, populated with caterpillars of the army worm (Spodoptera frugiperda). After the desired period of time, the effect in % is determined. 100% means that all the caterpillars have been killed; 0% means that none of the caterpillars have been killed. In this test, for example, the compounds Nos. I-1-h-6, I-1-a-9 and I-1-a-10 show, at an application rate of 500 g/ha, at least 80% activity.
To produce a suitable preparation of active compound, 1 part by weight of active compound is mixed with the stated amounts of solvents and emulsifier, and the concentrate is diluted with emulsifier-containing water to the desired concentration. Soybean leaves (Glycine max.) are sprayed with an active compound preparation of the desired concentration and populated with eggs from the tobacco budworm (Heliotis virescens). After 7 days, the effect in % is determined. 100% means that all eggs have been killed, 0% means that no eggs have been killed. In this test, for example, the compound No. I-1-a-5 shows, at an application rate of 500 g/ha, at least 80% activity.
To produce a suitable preparation of active compound, 1 part by weight of active compound is mixed with the stated amounts of solvents and emulsifier, and the concentrate is diluted with emulsifier containing water to the desired concentration. Discs of bean leaves (Phaseolus vulgaris) which are infested by all stages of the red spider mite (Tetranychus urticae) are sprayed with an active compound preparation of the desired concentration. After 6 days, the activity is determined in %. 100% means that all spider mites have been killed; 0% means that spider mite eggs have been killed. In this test, for example, the compound No. I-1-h-6 shows, at an application rate of 500 g/ha, at least 80% activity.
| Number | Date | Country | Kind |
|---|---|---|---|
| 08022104.7 | Dec 2008 | EP | regional |
