WO2010081755A1 - Novel herbicides - Google Patents

Novel herbicides Download PDF

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Publication number
WO2010081755A1
WO2010081755A1 PCT/EP2010/050074 EP2010050074W WO2010081755A1 WO 2010081755 A1 WO2010081755 A1 WO 2010081755A1 EP 2010050074 W EP2010050074 W EP 2010050074W WO 2010081755 A1 WO2010081755 A1 WO 2010081755A1
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WO
WIPO (PCT)
Prior art keywords
formula
compound
alkyl
crc
substituted
Prior art date
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PCT/EP2010/050074
Other languages
French (fr)
Inventor
Christopher John Mathews
John Finney
James Nicholas Scutt
Louisa Robinson
John Stephen Delaney
Original Assignee
Syngenta Limited
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Publication date
Priority to CN201080007996.9A priority Critical patent/CN102317275B/en
Priority to AU2010205799A priority patent/AU2010205799B2/en
Priority to CA2749615A priority patent/CA2749615C/en
Priority to US13/144,705 priority patent/US8865623B2/en
Priority to BRPI1006178A priority patent/BRPI1006178B8/en
Priority to EA201101060A priority patent/EA022104B1/en
Priority to ES10701333.6T priority patent/ES2587627T3/en
Priority to AP2011005799A priority patent/AP2011005799A0/en
Application filed by Syngenta Limited filed Critical Syngenta Limited
Priority to MX2011007321A priority patent/MX2011007321A/en
Priority to JP2011545711A priority patent/JP5584232B2/en
Priority to EP10701333.6A priority patent/EP2387569B1/en
Publication of WO2010081755A1 publication Critical patent/WO2010081755A1/en
Priority to ZA2011/05128A priority patent/ZA201105128B/en
Priority to US14/477,938 priority patent/US20140378305A1/en

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D309/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings
    • C07D309/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
    • C07D309/08—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D309/10—Oxygen 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
    • A01N35/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical
    • A01N35/06—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical containing keto or thioketo groups as part of a ring, e.g. cyclohexanone, quinone; Derivatives thereof, e.g. ketals
    • 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
    • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A01N37/36—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids
    • A01N37/38—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids having at least one oxygen or sulfur atom attached to an aromatic ring system
    • A01N37/40—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids having at least one oxygen or sulfur atom attached to an aromatic ring system having at least one carboxylic group or a thio analogue, or a derivative thereof, and one oxygen or sulfur atom attached to the same aromatic ring system
    • 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
    • A01N43/14—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 six-membered rings
    • A01N43/16—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 six-membered rings with oxygen as the ring hetero atom
    • 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
    • A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
    • A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
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    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
    • A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
    • A01N43/42—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings condensed with carbocyclic rings
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    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
    • A01N43/54—1,3-Diazines; Hydrogenated 1,3-diazines
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    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
    • A01N43/58—1,2-Diazines; Hydrogenated 1,2-diazines
    • 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
    • A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
    • A01N43/60—1,4-Diazines; Hydrogenated 1,4-diazines
    • 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
    • A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
    • A01N43/707—1,2,3- or 1,2,4-triazines; Hydrogenated 1,2,3- or 1,2,4-triazines
    • 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
    • A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
    • A01N43/74—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,3
    • A01N43/78—1,3-Thiazoles; Hydrogenated 1,3-thiazoles
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
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    • C07C205/35—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by etherified hydroxy groups having nitro groups and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
    • C07C205/36—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by etherified hydroxy groups having nitro groups and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton to carbon atoms of the same non-condensed six-membered aromatic ring or to carbon atoms of six-membered aromatic rings being part of the same condensed ring system
    • C07C205/38—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by etherified hydroxy groups having nitro groups and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton to carbon atoms of the same non-condensed six-membered aromatic ring or to carbon atoms of six-membered aromatic rings being part of the same condensed ring system the oxygen atom of at least one of the etherified hydroxy groups being further bound to a carbon atom of a six-membered aromatic ring, e.g. nitrodiphenyl ethers
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    • C07C255/54—Carboxylic acid nitriles having cyano groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing cyano groups and etherified hydroxy groups bound to the carbon skeleton
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    • C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
    • C07C309/63—Esters of sulfonic acids
    • C07C309/64—Esters of sulfonic acids having sulfur atoms of esterified sulfo groups bound to acyclic carbon atoms
    • C07C309/65—Esters of sulfonic acids having sulfur atoms of esterified sulfo groups bound to acyclic carbon atoms of a saturated carbon skeleton
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    • C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
    • C07C49/587—Unsaturated compounds containing a keto groups being part of a ring
    • C07C49/753—Unsaturated compounds containing a keto groups being part of a ring containing ether groups, groups, groups, or groups
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    • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
    • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
    • C07D405/10—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a carbon chain containing aromatic rings
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    • C07D405/12—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a chain containing hetero atoms as chain links
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    • C07D407/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00 containing two hetero rings
    • C07D407/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00 containing two hetero rings directly linked by a ring-member-to-ring-member bond
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    • C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
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Definitions

  • the present invention relates to novel, herbicidally active cyclic diones, and derivatives thereof, to processes for their preparation, to compositions comprising those compounds, and to their use in controlling weeds, especially in crops of useful plants, or in inhibiting undesired plant growth.
  • Cyclic diones having herbicidal action are described, for example, in WO08/071405 and WO08/145336.
  • the present invention accordingly relates to compounds of formula I
  • A is a mono- or bicyclic aryl or heteroaryl which contains a heteroatom selected from nitrogen, oxygen and sulfur, and which is unsubstituted or substituted,
  • R 1 is methyl, ethyl, n-propyl, isopropyl, cyclopropyl, halomethyl, haloethyl, vinyl, propenyl, ethynyl, propynyl, halogen, methoxy, ethoxy, halomethoxy or haloethoxy,
  • R 2 and R 3 are independently of each other hydrogen, methyl, ethyl, n-propyl, isopropyl, cyclopropyl, halomethyl, haloethyl, vinyl, propenyl, ethynyl, propynyl, halogen, methoxy, ethoxy, halomethoxy or haloethoxy,
  • R 4 , R 5 , R 6 and R 7 are independently of each other hydrogen, Ci-C 6 alkyl, C- ⁇ -C 6 alkyl substituted by
  • C 7 cycloalkyl substituted by CrC 4 alkyl or Ci-C 4 alkoxy C 5 -C 7 cycloalkenyl, C 5 -C 7 cycloalkenyl substituted by CrC 4 alkyl or Ci-C 4 alkoxy, heterocyclyl or heterocyclyl substituted by CrC 4 alkyl or
  • R 5 and R 6 together with the atoms to which they are bonded, form a 5- to 8-membered carbocyclyl or heterocyclyl, which contains one or two heteroatoms selected from nitrogen, oxygen or sulfur,
  • R 8 and R 9 are independently of each other hydrogen, CrC 6 alkyl, CrC 6 alkyl substituted by d- C 4 alkoxy or halogen, C 2 -C 6 alkenyl, C 2 -C 6 alkenyl substituted by CrC 4 alkoxy or halogen, C 2 -C 6 alkynyl, C 2 -C 6 alkynyl substituted by CrC 4 alkoxy or halogen, C 3 -C 7 cycloalkyl, C 3 - C 7 cycloalkyl substituted by CrC 4 alkyl or CrC 4 alkoxy, C 5 -C 7 cycloalkenyl, C 5 -C 7 cycloalkenyl substituted by CrC 4 alkyl or CrC 4 alkoxy, heterocyclyl or heterocyclyl substituted by CrC 4 alkyl or CrC 4 alkoxy, or
  • R 8 and R 9 together with the atoms to which they are bonded, form a 5- to 8-membered spiro- carbocyclyl or spiro-heterocyclyl, which contains one or two heteroatoms selected from nitrogen, oxygen or sulfur, and
  • R 10 , R 11 , R 12 and R 13 are independently of each other hydrogen, CrC ⁇ alkyl or d-C ⁇ alkoxy, and G is hydrogen or an agriculturally acceptable metal, sulfonium, ammonium or latentiating group.
  • each alkyl moiety either alone or as part of a larger group is a straight or branched chain and is, for example, methyl, ethyl, n-propyl, n-butyl, n-pentyl, n-hexyl, isopropyl, n-butyl, sec-butyl, isobutyl, fert-butyl or neopentyl.
  • the alkyl groups are suitably CrC ⁇ alkyl groups, but are preferably CrC 4 alkyl or CrCsalkyl groups, and, more preferably, CrC 2 alkyl groups.
  • Alkenyl and alkynyl moieties can be in the form of straight or branched chains, and the alkenyl moieties, where appropriate, can be of either the (E)- or (Z)-configu ration. Examples are vinyl, allyl and propargyl. Alkenyl and alkynyl moieties can contain one or more double and/or triple bonds in any combination. It is understood, that allenyl and alkylinylalkenyl are included in these terms.
  • Halogen is fluorine, chlorine, bromine or iodine.
  • Haloalkyl groups are alkyl groups which are substituted with one or more of the same or different halogen atoms and are, for example, CF 3 , CF 2 CI, CF 2 H, CCI 2 H, FCH 2 , CICH 2 , BrCH 2 , CH 3 CHF, (CHs) 2 CF, CF 3 CH 2 or CHF 2 CH 2 .
  • aryl refers to ring systems which may be mono- or bicyclic. Examples of such rings include phenyl and naphthyl. A preferred aryl group is phenyl.
  • heteroaryl preferably refers to an aromatic ring system containing at least one heteroatom and consisting either of a single ring or of two fused rings.
  • single rings will contain up to three and bicyclic systems up to four heteroatoms which will preferably be chosen from nitrogen, oxygen and sulphur.
  • Examples of such groups include furyl, thienyl, pyrrolyl, pyrazolyl, imidazolyl, 1 ,2,3-triazolyl, 1 ,2,4-triazolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, 1 ,2,4-oxadiazolyl, 1 ,3,4-oxadiazolyl, 1 ,2,5-oxadiazolyl, 1 ,2,3-thiadiazolyl, 1 ,2,4-thiadiazolyl, 1 ,3,4-thiadiazolyl, 1 ,2,5-thiadiazolyl, pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, 1 ,2,3-triazinyl, 1 ,2,4-triazinyl, 1 ,3,5-triazinyl, benzofuryl, benzisofuryl, benzothienyl,
  • heterocyclyl preferably refers to a non-aromatic preferably monocyclic or bicyclic ring systems containing up to 7 atoms including one or more (preferably one or two) heteroatoms selected from O, S and N.
  • heteroatoms selected from O, S and N.
  • examples of such rings include tetrahyd ropy ran, 1 ,3-dioxolane, oxetane, tetrahydrofuran, morpholine, thiomorpholine and piperazine.
  • Cycloalkyl includes preferably cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl. Cycloalkylalkyl is preferentially cyclopropylmethyl. Cycloalkenyl includes preferably cyclopentenyl and cyclohexenyl.
  • Carbocyclic rings include aryl, cycloalkyl or carbocyclic groups, and cycloalkenyl groups.
  • the optional substituents on aryl, heteroaryl and carbocycles are preferably selected independently, from halogen, nitro, cyano, rhodano, isothiocyanato, CrC ⁇ alkyl, Ci-C 6 haloalkyl, Ci-C 6 alkoxy(Ci-C 6 ) alkyl, C 2 -C 6 alkenyl, C 2 -C 6 haloalkenyl, C 2 -C 6 alkynyl, C 3 - C 7 cycloalkyl (itself optionally substituted with Ci-C ⁇ alkyl or halogen), C 5-7 cycloalkenyl (itself - A -
  • aryl or heteroaryl include arylcarbonylamino (where the aryl group is substituted by CrC ⁇ alkyl or halogen), (Ci-Cejalkoxycarbonylamino, (Ci-C6)alkoxycarbonyl- ⁇ /-(CrC 6 )alkylamino, aryloxycarbonylamino (where the aryl group is substituted by CrC ⁇ alkyl or halogen), aryloxycarbonyl- ⁇ /-(CrC6)alkylamino, (where the aryl group is substituted by CrC ⁇ alkyl or halogen), arylsulphonylamino (where the aryl group is substituted by CrC ⁇ alkyl or halogen), arylsulphonyl- ⁇ /-(CrC 6 )alkylamino (where the aryl group is substituted by Ci-C 6 alkyl or halogen), aryl-N-(Ci-C6)al
  • the invention relates also to the agriculturally acceptable salts which the compounds of formula I are able to form with transition metal, alkali metal and alkaline earth metal bases, amines, quaternary ammonium bases or tertiary sulfonium bases.
  • transition metal alkali metal and alkaline earth metal salt formers
  • hydroxides of copper, iron, lithium, sodium, potassium, magnesium and calcium special mention should be made of the hydroxides of copper, iron, lithium, sodium, potassium, magnesium and calcium, and preferably the hydroxides, bicarbonates and carbonates of sodium and potassium.
  • amines suitable for ammonium salt formation include ammonia as well as primary, secondary and tertiary Ci-Cisalkylamines, Ci-C 4 hydroxyalkylamines and C 2 -C 4 alkoxyalkyl- amines, for example methylamine, ethylamine, n-propylamine, isopropylamine, the four butylamine isomers, n-amylamine, isoamylamine, hexylamine, heptylamine, octylamine, nonylamine, decylamine, pentadecylamine, hexadecylamine, heptadecylamine, octadecylamine, methylethylamine, methylisopropylamine, methylhexylamine, methylnonylamine, methylpentadecylamine, methyloctadecylamine, ethylbut
  • Preferred quaternary ammonium bases suitable for salt formation correspond, for example, to the formula [N(R 3 R b R c R d )]OH, wherein R 3 , R b , R c and R d are each independently of the others hydrogen, Ci-C 4 alkyl.
  • Further suitable tetraalkylammonium bases with other anions can be obtained, for example, by anion exchange reactions.
  • Preferred tertiary sulfonium bases suitable for salt formation correspond, for example, to the formula [SR e R f R g ]OH, wherein R e , R f and R 9 are each independently of the others C 1 -C 4 alkyl. Trimethylsulfonium hydroxide is especially preferred.
  • Suitable sulfonium bases may be obtained from the reaction of thioethers, in particular dialkylsulfides, with alkylhalides, followed by conversion to a suitable base, for example a hydroxide, by anion exchange
  • the compounds of formula I according to the invention also include hydrates which may be formed during the salt formation.
  • the latentiating groups G are selected to allow its removal by one or a combination of biochemical, chemical or physical processes to afford compounds of formula I where G is H before, during or following application to the treated area or plants. Examples of these processes include enzymatic cleavage, chemical hydrolysis and photoloysis. Compounds bearing such groups G may offer certain advantages, such as improved penetration of the cuticula of the plants treated, increased tolerance of crops, improved compatibility or stability in formulated mixtures containing other herbicides, herbicide safeners, plant growth regulators, fungicides or insecticides, or reduced leaching in soils.
  • the latentiating group G is preferably selected from the groups CrC 8 alkyl, C 2 -C 8 haloalkyl, phenylC-i-Csalkyl (wherein the phenyl may optionally be substituted by C- ⁇ -C 3 alkyl, C- ⁇ -C 3 haloalkyl, CrCsalkoxy, C- ⁇ -C 3 haloalkoxy, C- ⁇ -C 3 alkylthio, C- ⁇ -C 3 alkylsulfinyl, Ci-C 3 alkylsulfonyl, halogen, cyano or by nitro), heteroaryld-Csalkyl (wherein the heteroaryl may optionally be substituted by CrC 3 alkyl, C r C 3 haloalkyl, C r C 3 alkoxy, C r C 3 haloalkoxy, C r C 3 alkylthio, C r C 3 alkylsulfinyl, C r C 3
  • R a is H, CrCi 8 alkyl, C 2 -Ci 8 alkenyl, C 2 -Ci 8 alkynyl, Ci-Ciohaloalkyl, CrCi 0 cyanoalkyl, C r C-ionitroalkyl, Ci-C-ioaminoalkyl, Ci-C 5 alkylamino(Ci-C 5 )alkyl, C 2 -C 8 dialkylamino(Ci-C 5 )alkyl, C 3 - C 7 cycloalkyl(CrC 5 )alkyl, Ci-C 5 alkoxy(Ci-C 5 )alkyl, C 3 -C 5 alkenyloxy(CrC 5 )alkyl, C 3 -(Cr C 5 )oxyalkyl, Ci-C 5 alkylthio(Ci-C 5 )alkyl, Ci-C 5 alkylsulfinyl(Ci-C 5 )al
  • R b is CrCisalkyl, C 3 -Cisalkenyl, C 3 -Cisalkynyl, C 2 -Ciohaloalkyl, d-Ciocyanoalkyl, d- Cionitroalkyl, C 2 -Ci 0 aminoalkyl, Ci-C 5 alkylamino(CrC 5 )alkyl, C 2 -C 8 dialkylamino(CrC 5 )alkyl, C 3 - C 7 cycloalkyl(CrC 5 )alkyl, Ci-C 5 alkoxy(CrC 5 )alkyl, C 3 -C 5 alkenyloxy(CrC 5 )alkyl, C 3 - C 5 alkynyloxy(CrC 5 )alkyl, Ci-C 5 alkylthio(CrC 5 )alkyl, Ci-C 5 alkylsulfinyl(Ci-C 5 )alkyl
  • R c and R d are each independently of each other hydrogen, d-Ci O alkyl, C 3 -Ci 0 alkenyl, C 3 - Cioalkynyl, C 2 -Ci 0 haloalkyl, d-Ciocyanoalkyl, d-Ci 0 nitroalkyl, d-Cioaminoalkyl, d- C 5 alkylamino(CrC 5 )alkyl, C 2 -C 8 dialkylamino(CrC 5 )alkyl, C 3 -C 7 cycloalkyl(CrC 5 )alkyl, C r C 5 alkoxy(CrC 5 )alkyl, C 3 -C 5 alkenyloxy(CrC 5 )alkyl, C 3 -C 5 alkynyloxy(CrC 5 )alkyl, C r C 5 alkylthio(CrC 5 )alkyl,
  • R f and R 9 are are each independently of each other Ci-Cioalkyl, C 2 -Cioalkenyl, C 2 -Cioalkynyl, Cr Cioalkoxy, CrCiohaloalkyl, Ci-Ciocyanoalkyl, Ci-Cionitroalkyl, d-Cioaminoalkyl, Cr C 5 alkylamino(Ci-C 5 )alkyl, C 2 -C 8 dialkylamino(Ci-C 5 )alkyl, C 3 -C 7 cycloalkyl(Ci-C 5 )alkyl, C r C 5 alkoxy(CrC 5 )alkyl, C 3 -C 5 alkenyloxy(Ci-C 5 )alkyl, C 3 -C 5 alkynyloxy(Ci-C 5 )alkyl, C r C 5 alkylthio(CrC 5 )alkyl, Ci-
  • R h is CrC-ioalkyl, C 3 -Cioalkenyl, C 3 -Cioalkynyl, d-Ciohaloalkyl, Ci-Ciocyanoalkyl, Cr Cionitroalkyl, C 2 -Cioaminoalkyl, Ci-C 5 alkylamino(CrC 5 )alkyl, C 2 -C 8 dialkylamino(Ci-C 5 )alkyl, C 3 - C 7 cycloalkyl(CrC 5 )alkyl, Ci-C 5 alkoxy(CrC 5 )alkyl, C 3 -C 5 alkenyloxy(CrC 5 )alkyl, C 3 - C 5 alkynyloxy(CrC 5 )alkyl, Ci-C 5 alkylthio(CrC 5 )alkyl, Ci-C 5 alkylsulfinyl(CrC 5 )alky
  • the latentiating group G is a group -C(X a )-R a or -C(X b )-X c -R b , and the meanings of X a , R a , X b , X c and R b are as defined above.
  • G is hydrogen, an alkali metal or alkaline earth metal, where hydrogen is especially preferred.
  • compounds of formula I may exist in different isomeric forms.
  • G is hydrogen and R 4 and R 5 are different from R 6 and R 7 , compounds of formula I may exist in different tautomeric forms:
  • A is phenyl, naphthyl, a 5- or 6-membered heteroaryl or a bicyclic 8- to 10-membered heteroaryl.
  • A is substituted by halogen, Ci-C 4 alkyl, CrC 4 haloalkyl, C 2 -C 4 alkenyl, C 2 -C 4 haloalkenyl, C 2 -C 4 alkynyl, Ci-C 4 alkoxy, CrC 4 haloalkoxy, CrC 4 alkylthio, CrC 4 alkylsulfinyl, Ci-C 4 alkylsulfonyl, Ci-C 4 haloalkylthio, Ci-C 4 haloalkylsulfinyl, Ci-C 4 haloalkylsulfonyl, nitro, cyano, Cs-C ⁇ cycloalkyl, d-Csalkylcarbon
  • A is phenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, benzothiazolyl, benzoxazolyl, cinnolinyl, quinolinyl, quinazolinyl, quinoxalinyl or benzotriazinyl in each case substituted by halogen, methyl, ethyl, trifluorom ethyl, methoxy, difluoromethoxy, trifluoromethoxy, nitro or cyano.
  • R 1 is methyl, ethyl, n-propyl, cyclopropyl, halogen or d-C2haloalkoxy.
  • R 2 and R 3 are independently of each other hydrogen, methyl or halogen, especially hydrogen.
  • R 4 , R 5 , R 6 and R 7 are independently of each other hydrogen or d-C ⁇ alkyl, or R 4 and R 5 , or R 6 and R 7 , together with the atoms to which they are bonded form a spiro- tetrahydropyranyl or spiro-tetrahydrofuranyl, or R 5 and R 6 together with the atoms to which they are bonded form a 6- or 7-membered carbocyclyl.
  • Y is O or CR 8 R 9 , where R 8 and R 9 are as defined above.
  • R 8 and R 9 are independently of each other hydrogen or methyl, or R 8 and R 9 together with the atoms to which they are bonded form a spiro-tetrahydropyranyl or a spiro- tetrahydrofuranyl.
  • G is hydrogen, a group -C(X a )-R a or -C(X b )-X c -R b , where the meanings of X a , R a , X b , X c and R b are as defined above, and particularly hydrogen.
  • a particularly preferred group of compounds of formula I A is phenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, benzothiazolyl, benzoxazolyl, cinnolinyl, quinolinyl, quinazolinyl, quinoxalinyl or benzotriazinlyl, in each case substituted by halogen, methyl, trifluorom ethyl, nitro or cyano, R 1 is ethyl, R 2 and R 3 are hydrogen, R 4 to R 7 are hydrogen or methyl or R 5 and R 6 , together with the atoms to which they are bonded, form a 6- or 7-membered carbocyclyl, Y is O or CR 8 R 9 , wherein R 8 and R 9 are independently of each other hydrogen or methyl, or R 8 and R 9 together with the atoms to which they are bonded form a spiro-t
  • R 1 is methyl, ethyl or cyclopropyl
  • R 2 and R 3 are hydrogen
  • R 4 , R 5 , R 6 and R 7 are independently of each other hydrogen or methyl, or R 4 and R 5 , or R 6 and R 7 , together with the atoms to which they are bonded form a spiro-tetrahydropyranyl or spiro-tetrahydrofuranyl, or R 5 and R 6 together with the atoms to which they are bonded form a 6- or 7-membered carbocyclyl
  • Y is O or CR 8 R 9 , where R 8 and R 9 are independently of each other hydrogen or methyl, or R 8 and R 9 together with the atoms to which they are bonded form a spiro-tetrahydropyranyl or a spiro-tetrahydrofuranyl
  • G is hydrogen and A is phenyl, naphthyl, pyrid
  • This invention covers both a compound of formula I and a compound of formula U, together with mixtures of these compounds in any ratio.
  • the O-acylation of cyclic 1 ,3-diones may be effected by procedures similar to those described, for example, by R. Haines, US4175135, and by T. Wheeler, US4422870, US4659372 and US4436666.
  • diones of formula (A) may be treated with an acylating agent preferably in the presence of at least one equivalent of a suitable base, and optionally in the presence of a suitable solvent.
  • the base may be inorganic, such as an alkali metal carbonate or hydroxide, or a metal hydride, or an organic base such as a tertiary amine or metal alkoxide.
  • suitable inorganic bases include sodium carbonate, sodium or potassium hydroxide, sodium hydride
  • suitable organic bases include trialkylamines, such as trimethylamine and triethylamine, pyridines or other amine bases such as 1 ,4-diazobicyclo[2.2.2]-octane and 1 ,8- diazabicyclo[5.4.0]undec-7-ene.
  • Preferred bases include triethylamine and pyridine.
  • Suitable solvents for this reaction are selected to be compatible with the reagents and include ethers such as tetrahydrofuran and 1 ,2-dimethoxyethane and halogenated solvents such as dichloromethane and chloroform.
  • acylating agent is a carboxylic acid
  • acylation is preferably effected in the presence of a known coupling agent such as 2-chloro-1- methylpyridinium iodide, ⁇ /, ⁇ /-dicyclohexylcarbodiimide, 1-(3-dimethylaminopropyl)-3- ethylcarbodiimide and ⁇ /, ⁇ /-carbodiimidazole, and optionally in the presence of a base such as triethylamine or pyridine in a suitable solvent such as tetrahydrofuran, dichloromethane or acetonitrile.
  • a base such as triethylamine or pyridine in a suitable solvent such as tetrahydrofuran, dichloromethane or acetonitrile.
  • Phosphorylation of cyclic 1 ,3-diones may be effected using a phosphoryl halide or thiophosphoryl halide and a base by procedures analogous to those described by L. Hodakowski, US4409153.
  • Sulfonylation of a compound of formula (A ) may be achieved using an alkyl or aryl sulfonyl halide, preferably in the presence of at least one equivalent of base, for example by the procedure of C. Kowalski and K. Fields, J. Org. Chem., (1981 ), 46, 197-201.
  • the compounds of the formula (B) have been particularly designed as intermediates in the synthesis of the compounds of the formula I.
  • Compounds of formula (B) wherein R is hydrogen or Ci-C 4 alkyl, (especially methyl, ethyl and fert-butyl) may be cyclised under acidic conditions, preferably in the presence of a strong acid such as sulfuric acid, polyphosphoric acid or Eaton's reagent, optionally in the presence of a suitable solvent such as acetic acid, toluene or dichloromethane.
  • a strong acid such as sulfuric acid, polyphosphoric acid or Eaton's reagent
  • a suitable solvent such as acetic acid, toluene or dichloromethane.
  • a compound of formula (B) wherein R is alkyl (preferably methyl or ethyl) may be cyclised under acidic or basic conditions, preferably under basic conditions in the presence of at least one equivalent of a strong base such as potassium fert-butoxide, lithium diisopropylamide, sodium bis(trimethylsilyl)amide or sodium hydride and in a solvent such as tetrahydrofuran, toluene, dimethylsulfoxide or ⁇ /, ⁇ /-dimethylformamide.
  • a strong base such as potassium fert-butoxide, lithium diisopropylamide, sodium bis(trimethylsilyl)amide or sodium hydride
  • a solvent such as tetrahydrofuran, toluene, dimethylsulfoxide or ⁇ /, ⁇ /-dimethylformamide.
  • a compound of formula (B), wherein R is H may be esterified to a compound of formula (B), wherein R is alkyl, under known conditions (for example by treatment with an alcohol, R-OH, in the presence of an acid catalyst).
  • a compound of formula (B), wherein R is H may be prepared by hydrolysis of a compound of formula (C) wherein R is H or alkyl and R' is alkyl (preferably methyl or ethyl), followed by acidification of the reaction mixture to effect decarboxylation, by similar processes to those described by, for example, T. Wheeler, US4209532.
  • a compound of formula (B), wherein R is alkyl (preferably methyl) may be prepared from a compound of formula (C), wherein R is alkyl (preferably methyl), through a Krapcho decarboxylation procedure under known conditions using known reagents (see for example G. Quallich, P. Morrissey, Synthesis, (1993), (1 ), 51-53).
  • a compound of formula (C) wherein R is alkyl may be prepared by treating a compound of formula (D) with a suitable carboxylic acid chloride of formula (E) wherein R is alkyl under basic conditions.
  • Suitable bases include potassium ferf-butoxide, sodium bis(trimethylsilyl)amide and lithium diisopropylamide and the reaction is preferably conducted in a suitable solvent (such as tetrahydrofuran or toluene) at a temperature of between -80 0 C and 30 0 C:
  • a compound of formula (C), wherein R is H may be prepared by treating a compound of formula (D) with a suitable base (such as potassium fert-butoxide, sodium bis(trimethylsilyl)amide and lithium diisopropylamide) in a suitable solvent (such as tetrahydrofuran or toluene) at a suitable temperature (between -80 0 C and 30 0 C) and reacting the resulting anion with a suitable anhydride of formula (F):
  • a suitable base such as potassium fert-butoxide, sodium bis(trimethylsilyl)amide and lithium diisopropylamide
  • a suitable solvent such as tetrahydrofuran or toluene
  • a compound of formula (A) may be prepared by reacting a compound of formula (G) with an aryllead tricarboxylate, in the presence of a suitable ligand and in a suitable solvent. Similar reactions are described in the literature (for example see, M. Muehlebach et al., WO08/071405; J. Pinhey, B. Rowe, Aust. J. Chem., (1979), 32, 1561-6; J. Morgan, J. Pinhey, J. Chem. Soc. Perkin Trans. 1 , (1990), 3, 715-20).
  • the aryllead tricarboxylate is an aryllead triacetate of formula (H).
  • the ligand is a nitrogen containing heterocycle such as ⁇ /, ⁇ /-dimethylaminopyridine, 1 ,10-phenanthroline pyridine, bipyridine, or imidazole, and one to ten equivalents of ligand with respect to a compound of formula (J) is preferably used.
  • the ligand is ⁇ /, ⁇ /-dimethylaminopyridine.
  • the solvent is preferably chloroform, dichloromethane or toluene, most preferably chloroform, or a mixture of chloroform and toluene.
  • the reaction is conducted at a temperature of -10 0 C to 100 0 C, most preferably at 40- 90°C).
  • a compound of formula (H) may be prepared from a compound of formula (I) by treatment with lead tetraacetate in a suitable solvent (for example chloroform) at 25°C to 100 0 C (preferably 25- 50 0 C), and optionally in the presence of a catalyst such as mercury diacetate, according to procedures described in the literature (for example see, K. Shimi, G. Boyer, J-P. Finet and J-P. GaIy, Letters in Organic Chemistry, (2005), 2, 407-409; J. Morgan and J. Pinhey, J. Chem. Soc. Perkin Trans. 1 ; (1990), 3, 715-720).
  • a suitable solvent for example chloroform
  • An aryl boronic acid of formula (I) may be prepared from an aryl halide of formula (J), wherein Hal is bromine or iodine by known methods (see, for example, W. Thompson and J. Gaudino, J. Org. Chem, (1984), 49, 5237-5243 and R. Hawkins et al., J. Am. Chem. Soc, (1960), 82, 3053-3059).
  • an aryl halide of formula (J) may be treated with an alkyl lithium or alkyl magnesium halide at low temperature, and the aryl magnesium or aryl lithium reagent obtained is allowed to react with a trialkyl borate, B(OR")3, preferably trimethylborate, to give an aryl dialkylboronate which may be hydrolysed to the desired boronic acid of formula (I) under acidic conditions.
  • a trialkyl borate, B(OR")3, preferably trimethylborate to give an aryl dialkylboronate which may be hydrolysed to the desired boronic acid of formula (I) under acidic conditions.
  • B(OR")3 preferably trimethylborate
  • the same overall transformation of compound (J) to compound (I) may be achieved through a palladium-catalysed borylation reaction under known conditions using known reagents (see for example T. Ishiyama, M. Murata, N. Miyaura, J. Org. Chem.
  • Aryl halides of formula (J) are known compounds or may be made by known methods from known compounds (See, for example, R. Clark, J. Agric. Food Chem., (1996), 44 (11 ), 3643- 3652; T. Okamato and J. Bunnett, J. Am. Chem. So ⁇ , (1956), 78, 5357-5362; H. Scarborough and J. Sweeten, J. Chem. So ⁇ , (1934), 52-56).
  • a compound of formula (A) may be prepared by cross-coupling an aryl halide of formula (K), wherein Hal is bromine or iodine, with a phenol, A-OH, in the presence of a suitable catalyst, optionally a suitable ligand or additive, a suitable base and a suitable solvent, under conditions similar to those described, for example, by S. Hu et ai, J. Org. Chem., (2008), 73, 7814-7817; P. Chan et ai, Tetrahedron Lett., (2008), 49, 2018-2022); R. Hosseinzadeh et al., Synthetic Commun., (2008) 38, 3023-3031 ; S.
  • Suitable catalysts include palladium and copper catalysts such as palladium(ll) acetate, bis(dibenzylideneacetone)palladium(ll), copper powder, copper(ll) acetate, copper(l) chloride, copper(l) bromide, copper(ll) bromide, copper(l) iodide, copper(l) oxide, copper(ll) sulfate, copper(l) trifluoromethanesulfonate and copper(ll) trifluoromethanesulfonate.
  • palladium and copper catalysts such as palladium(ll) acetate, bis(dibenzylideneacetone)palladium(ll), copper powder, copper(ll) acetate, copper(l) chloride, copper(l) bromide, copper(ll) bromide, copper(l) iodide, copper(l) oxide, copper(ll) sulfate, copper(l) trifluoromethanesulfonate and copper(ll) tri
  • the catalysts are used in conjunction with appropriate ligands or additives, such as ⁇ /-methylglycine ⁇ /, ⁇ /-dimethylglycine, 1-butylimidazole, ethyl acetate, ethylene glycol diacetate, 8- hydroxyquinoline, L-proline, 1 -naphthoic acid, triphenylphosphine, 1 ,1 '- bis(diphenylphosphino)ferrocene, salicylaldoxime, 2-( ⁇ /, ⁇ /-dimethylamino)-2'-di-ferf- butylphosphinobiphenyl, neocuproine, pyrrolidine-2-phosphionic acid phenyl monoester, 2,2,6,6- tetramethylheptane-3,5-dione, tetrabutylammonium bromide, 2,2-bipyridine or 1 ,10- phenanthroline.
  • Suitable bases are cesium carbonate, cesium fluoride, potassium fluoride, potassium phosphate and sodium hydroxide.
  • Suitable solvents are acetonitrile, ⁇ /, ⁇ /,- dimethylformamide, 1 ,4-dioxane or toluene, or mixed solvent systems such as toluene / tetrahydrofuran and 1 ,4-dioxane / water.
  • a compound of formula (K) may be prepared according to procedures described by M. Muehlebach et al., WO08/071405.
  • a compound of formula (K) may be prepared from a compound of formula (G) by reaction with a compound of formula (L) under conditions similar to those used for the preparation of a compound of formula (A) from a compound of formula (G).
  • a compound of formula (G) formula (L) formula (K)
  • a compound of formula (A) may be prepared by reacting a compound of formula (M) with an aryl halide of formula A-HaI, wherein Hal represents fluorine, chlorine, bromine or iodine.
  • A-HaI is an aryl bromide or aryl iodide
  • the reaction may be effected using suitable copper or palladium catalysts under conditions decribed previously for the preparation of a compound of formula (A) from a compound of formula (K).
  • A-HaI is a suitably electron-deficient aryl halide (for example an aryl fluroride or aryl chloride additionally bearing one or more electron-withdrawing substituents such as trifluoromethyl, nitro or cyano), or a suitable heteroaryl halide (for example a halopyridine, halopyrimidine, or other electron-deficient heteroaryl halide)
  • aryl halide for example an aryl fluroride or aryl chloride additionally bearing one or more electron-withdrawing substituents such as trifluoromethyl, nitro or cyano
  • a suitable heteroaryl halide for example a halopyridine, halopyrimidine, or other electron-deficient heteroaryl halide
  • a compound of formula (M) may be prepared from a compound of formula (K).
  • a compound of formula (K) is deprotonated with a base (such as a Grignard reagent or alkyllithium reagent), and then treated with an alkyllithium reagent to effect metal-halogen exchange.
  • the resulting organometallic species may then be converted into a compound of formula (M) either by treatment with a trialkylborate such as trimethyl borate followed by oxidation (for example by hydrogen peroxide, ⁇ /-methyl morpholine ⁇ /-oxide or oxone) as described, for example by G. Prakash et al., J. Org.
  • a compound of formula (M) may be prepared from a compound of formula (K) by treatment with an aqueous solution of an alkali metal hydroxide in the presence of a suitable catalyst and a suitable ligand, according to known procedures.
  • a compound of formula (M) may be prepared by treating a compound of formula (K) with potassium hydroxide in the presence of a palladium catalyst (for example bis(dibenzylidene- acetone)palladium(ll), and in the presence of a suitable phosphine ligand such as 2-(di-fert- butylphosphino)-2',4',6'-triisopropylbiphenyl and 2-(di-ferf-butylphosphino)-3,4,5,6-tetramethyl- 2',4',6'-triisopropylbiphenyl, under conditions described, for example, by S. Buchwald et ai, J. Am. Chem.
  • a palladium catalyst for example bis(dibenzylidene- acetone)palladium(ll)
  • a suitable phosphine ligand such as 2-(di-fert- butylphosphino)-2',4'
  • a compound of formula (M) may be prepared by treating a compound of formula (K) treatment with an aqueous solution of sodium hydroxide in the presence of a suitable copper catalyst (for example copper(l) iodide) and a suitable ligand (such as L-proline), under conditions described, for example, by C. Kormos and N. Leadbeater, Tetrahedron (2006), 62 (19), 4728-4732 .
  • a suitable copper catalyst for example copper(l) iodide
  • a suitable ligand such as L-proline
  • a compound of formula (K) may be treated with a benzyl alcohol in the presence of a suitable copper catalyst, followed by debenzylation under known conditions (for example by catalytic hydrogenolysis).
  • the compounds of the formula (M) are novel and have been especially designed as intermediates for the synthesis of the compounds of formula I.
  • a compound of formula (A) may be prepared by the reaction of a compound of formula (N), wherein Ar is an aryl moiety (preferably phenyl) with an arylboronic acid of formula (I) in the presence of a suitable palladium catalyst, a suitable base, an optionally in the presence of a suitable ligand or additive, and in a suitable solvent.
  • Ar is an aryl moiety (preferably phenyl)
  • arylboronic acid of formula (I) in the presence of a suitable palladium catalyst, a suitable base, an optionally in the presence of a suitable ligand or additive, and in a suitable solvent.
  • Suitable palladium catalysts include, for example palladium(ll) dihalides, palladium(ll) acetate and palladium(ll) sulfate, and is preferably palladium(ll) acetate.
  • Suitable ligands include triphenyl- phosphine, tricyclopentylphosphine, tricyclohexylphosphine, 2-dicyclo-hexylphosphino-2',6'- dimethoxybiphenyl, 2-dicyclohexylphosphino-2',4',6'-triisopropyl-biphenyl, 1 ,1'-bis(diphenyl- phosphino)ferrocene and 1 ,2-bis(diphenylphosphino)ethane.
  • the reaction may also be carried out in the presence of other additives, such as tetralkylammonium salts, for example, tetrabutylammonium bromide.
  • Suitable bases include alkali metal hydroxides, especially lithium hydroxide.
  • a suitable solvent is aqueous 1 ,2-dimethoxyethane.
  • a compound of Formula (N), wherein Ar is phenyl may be prepared from a compound of Formula (G) by treatment with a hypervalent iodine reagent such as a (diacetoxy)iodobenzene or iodosylbenzene and a base such as aqueous sodium carbonate, lithium hydroxide or sodium hydroxide in a solvent such as water or an aqueous alcohol such as aqueous ethanol according to the procedures of K. Schank and C. Lick, Synthesis (1983), 392; R. Moriarty et al, J. Am. Chem. Soc, (1985), 107, 1375, or of Z. Yang et al., Org. Lett., (2002), 4 (19), 3333:
  • a hypervalent iodine reagent such as a (diacetoxy)iodobenzene or iodosylbenzene
  • a base such as aqueous sodium carbon
  • a compound of formula I may be prepared by reacting a compound of formula (O) (wherein G is preferably C 1 - 4 alkyl, and Hal is a halogen, preferably bromine or iodine), with an arylboronic acid of formula (I) in the presence of a suitable palladium catalyst (for example 0.001-50% palladium(ll) acetate with respect to compound (O)) and a base (for example 1 to 10 equivalents potassium phosphate with respect to compound (O)) and preferably in the presence of a suitable ligand (for example 0.001-50% (2-dicyclohexylphosphino)-2',6'- dimethoxybiphenyl with respect to compound (U)), and in a suitable solvent (for example toluene), preferably between 25°C and 200 0 C. Similar couplings are known in the literature (see for example, Y. Song, B. Kim and J.-N. Heo, Tetrahedron
  • a compound of formula (O) may be prepared by halogenating a compound of formula (G), followed by reaction of the resulting halide of formula (Q) with a Ci-C 4 alkyl halide or tri-Ci.C 4 - alkylorthoformate under known conditions, for example by the procedures of R. Shepherd and A. White (J. Chem. Soc. Perkin Trans. 1 (1987), 2153-2155) and Y.-L. Lin et al. (Bioorg. Med. Chem. (2002), 10, 685-690).
  • a compound of formula (O) may be prepared by reacting a compound of formula (G) with a Ci-C 4 alkyl halide or a tri-Ci.C 4 -alkylorthoformate, and halogenating the resulting enone of formula (R) under known conditions (see for example Y. Song, B. Kim and J.-N. Heo, Tetrahedron Letters (2005), 46(36), 5987-5990).
  • a compound of formula (A) may be prepared by reacting a compound of formula (G) with a compound of formula (J) in the presence of a suitable palladium catalyst (for example 0.001-50% palladium(ll) acetate with respect to compound (G)) and a base (for example 1 to 10 equivalents potassium phosphate with respect to compound (G)) and preferably in the presence of a suitable ligand (for example 0.001-50% (2-dicyclohexylphosphino)-2',4',6'- triisopropylbiphenyl with respect to compound (G)), and in a suitable solvent (for example dioxane), preferably between 25°C and 200 0 C and optionally under microwave heating.
  • a suitable palladium catalyst for example 0.001-50% palladium(ll) acetate with respect to compound (G)
  • a base for example 1 to 10 equivalents potassium phosphate with respect to compound (G)
  • a suitable ligand for example 0.00
  • a compound of formula (A) may be prepared by reacting a compound of formula (J) with a compound of formula (M) in the presence of a suitable copper catalyst (for example 0.001-50% copper(l) iodide with respect to compound (J)) and a base (for example 1 to 10 equivalents cesium carbonate with respect to compound (J)) and preferably in the presence of a suitable ligand (for example 0.001- 50% L-proline with respect to compound (J)), and in a suitable solvent (for example dimethylsulfoxide), preferably between 25°C and 200 0 C.
  • a suitable copper catalyst for example 0.001-50% copper(l) iodide with respect to compound (J)
  • a base for example 1 to 10 equivalents cesium carbonate with respect to compound (J)
  • a suitable ligand for example 0.001- 50% L-proline with respect to compound (J)
  • a suitable solvent for example dimethylsulfoxide
  • the compounds of formula I according to the invention can be used as crop protection agents in unmodified form, as obtained in the synthesis, but they are generally formulated into crop protection compositions in a variety of ways using formulation adjuvants, such as carriers, solvents and surface-active substances.
  • the formulations can be in various physical forms, for example in the form of dusting powders, gels, wettable powders, coated or impregnated granules for manual or mechanical distribution on target sites, water-dispersible granules, water-soluble granules, emulsifiable granules, water-dispersible tablets, effervescent compressed tablets, water-soluble tapes, emulsifiable concentrates, microemulsifiable concentrates, oil-in-water (EW) or water-in-oil (WO) emulsions, other multiphase systems such as oil/water/oil and water/oil/water products, oil flowables, aqueous dispersions, oily dispersions, suspoemulsions, capsule suspensions, soluble liquids, water-soluble concentrates (with water or a water-miscible organic solvent as carrier), impregnated polymer films or in other forms known, for example, from the
  • the active ingredient may be incorporated into microfibers or micro-rods formed of polymers or polymerizable monomers and having diameter of about 0.1 to about 50 microns and aspect ratio of between about 10 and about 1000.
  • Such formulations can either be used directly or are diluted prior to use. They can then be applied through suitable ground or aerial application spray equipment or other ground application equipment such as central pivot irrigation systems or drip/trickle irrigation means.
  • Diluted formulations can be prepared, for example, with water, liquid fertilisers, micronutrients, biological organisms, oil or solvents.
  • the formulations can be prepared, for example, by mixing the active ingredient with formulation adjuvants in order to obtain compositions in the form of finely divided solids, granules, solutions, dispersions or emulsions.
  • the active ingredients can also be contained in fine microcapsules consisting of a core and a polymeric shell. Microcapsules usually have a diameter of from 0.1 to 500 microns. They contain active ingredients in an amount of about from 25 to 95 % by weight of the capsule weight.
  • the active ingredients can be present in the form of liquid technical material, in the form of a suitable solution, in the form of fine particles in solid or liquid dispersion or as a monolithic solid.
  • the encapsulating membranes comprise, for example, natural and synthetic gums, cellulose, styrene-butadiene copolymers or other similar suitable membrane forming material, polyacrylonitrile, polyacrylate, polyester, polyamides, polyureas, polyurethane, aminoplast resins or chemically modified starch or other polymers that are known to the person skilled in the art in this connection.
  • microcapsules it is possible for fine so called “microcapsules” to be formed wherein the active ingredient is present in the form of finely divided particles in a solid matrix of a base substance, but in that case the microcapsule is not encapsulated with a diffusion limiting membrane as outlined in the preceding paragraph.
  • the active ingredients may be adsorbed on a porous carrier. This may enable the active ingredients to be released into their surroundings in controlled amounts (e.g. slow release).
  • Other forms of controlled release formulations are granules or powders in which the active ingredient is dispersed or dissolved in a solid matrix consisting of a polymer, a wax or a suitable solid substance of lower molecular weight.
  • Suitable polymers are polyvinyl acetates, polystyrenes, polyolefins, polyvinyl alcohols, polyvinyl pyrrolidones, alkylated polyvinyl pyrrolidones, copolymers of polyvinyl pyrrolidones and maleic anhydride and esters and half- esters thereof, chemically modified cellulose esters like carboxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose, examples of suitable waxes are polyethylene wax, oxidized polyethylene wax, ester waxes like montan waxes, waxes of natural origin like camauba wax, candelilla wax, bees wax etc.
  • compositions according to the invention are starch, stearin, lignin.
  • formulation adjuvants suitable for the preparation of the compositions according to the invention are known per se.
  • liquid carriers there may be used: water, aromatic solvents such as toluene, m-xylene, o- xylene, p-xylene and mixtures thereof, cumene, aromatic hydrocarbon blends with boiling ranges between 140 and 320 0 C known under various trademarks like Solvesso ® , Shellsol A ® , Caromax ® , Hydrosol ® , paraffinic and isoparaffinic carriers such as paraffin oils, mineral oils, de- aromatized hydrocarbon solvents with boiling ranges between 50 and 320 0 C known for instance under the trademark Exxsol ® , non-dearomatized hydrocarbon solvents with boiling ranges between 100 and 320 0 C known under the tradename Varsol ® , isoparaffinic solvents with boiling ranges between 100 and 320 0 C known under tradenames like Isopar ® or Shellsol T ® , hydrocarbons such as cyclohexane, tetrahydronaphthalene (tetral
  • Water is generally the carrier of choice for the dilution of the concentrates.
  • Suitable solid carriers are, for example, talc, titanium dioxide, pyrophyllite clay, silica (fumed or precipated silica and optionally functionalised or treated, for instance silanised), attapulgite clay, kieselguhr, limestone, calcium carbonate, bentonite, calcium montomorillonite, cottonseed husks, wheatmeal, soybean flour, pumice, wood flour, ground walnut shells, lignin and similar materials, as described, for example, in the EPA CFR 180.1001.
  • (c) & (d). Powdered or granulated fertilisers can also be used as solid carriers.
  • a large number of surface-active substances can advantageously be used both in solid and in liquid formulations, especially in those formulations which can be diluted with a carrier prior to use.
  • Surface-active substances may be anionic, cationic, amphoteric, non-ionic or polymeric and they may be used as emulsifiying, wetting, dispersing or suspending agents or for other purposes.
  • Typical surface-active substances include, for example, salts of alkyl sulfates, such as diethanolammonium lauryl sulfate; Sodium lauryl sulfate, salts of alkylarylsulfonates, such as calcium or sodium dodecylbenzenesulfonate; alkylphenol-alkylene oxide addition products, such as nonylphenol ethoxylates; alcohol-alkylene oxide addition products, such as tridecyl alcohol ethoxylate; soaps, such as sodium stearate; salts of alkylnaphthalenesulfonates, such as sodium dibutylnaphthalenesulfonate; dialkyl esters of sulfosuccinate salts, such as sodium di(2- ethylhexyl)sulfosuccinate; sorbitol esters, such as sorbitol oleate; quaternary amines, such as lauryl trimethylammoni
  • Further adjuvants which can usually be used in pesticidal formulations include crystallisation inhibitors, viscosity-modifying substances, suspending agents, dyes, anti-oxidants, foaming agents, light absorbers, mixing aids, anti-foams, complexing agents, neutralising or pH-modifying substances and buffers, corrosion-inhibitors, fragrances, wetting agents, absorption improvers, micronutrients, plasticisers, glidants, lubricants, dispersants, thickeners, anti-freezes, microbiocides, compatibility agents and solubilisers and also liquid and solid fertilisers.
  • the formulations may also comprise additional active substances, for example further herbicides, herbicide safeners, plant growth regulators, fungicides or insecticides.
  • compositions according to the invention can additionally include an additive (commonly referred to as an adjuvant), comprising a mineral oil, an oil of vegetable or animal origin, alkyl esters of such oils or mixtures of such oils and oil derivatives.
  • an additive commonly referred to as an adjuvant
  • the amount of oil additive used in the composition according to the invention is generally from 0.01 to 10 %, based on the spray mixture.
  • the oil additive can be added to the spray tank in the desired concentration after the spray mixture has been prepared.
  • Preferred oil additives comprise mineral oils or an oil of vegetable origin, for example rapeseed oil, olive oil or sunflower oil, emulsifiable vegetable oil, such as AMIGO® (Loveland Products Inc.), alkyl esters of oils of vegetable origin, for example the methyl derivatives, or an oil of animal origin, such as fish oil or beef tallow.
  • a preferred additive contains, for example, as active components essentially 80 % by weight alkyl esters of fish oils and 15 % by weight methylated rapeseed oil, and also 5 % by weight of customary emulsifiers and pH modifiers.
  • Especially preferred oil additives comprise alkyl esters of C 8 -C 22 fatty acids, especially the methyl derivatives of C 12 -C 18 fatty acids, for example the methyl esters of lauric acid, palmitic acid and oleic acid, being important.
  • Those esters are known as methyl laurate (CAS-1 1 1-82-0), methyl palmitate (CAS- 1 12-39-0) and methyl oleate (CAS-1 12-62-9).
  • a preferred fatty acid methyl ester derivative is AGNIQUE ME 18 RD-F® (Cognis).
  • Those and other oil derivatives are also known from the Compendium of Herbicide Adjuvants, 5th Edition, Southern Illinois University, 2000.
  • the application and action of the oil additives can be further improved by combining them with surface-active substances, such as non-ionic, anionic, cationic or amphoteric surfactants.
  • surface-active substances such as non-ionic, anionic, cationic or amphoteric surfactants.
  • suitable anionic, non-ionic, cationic or amphoteric surfactants are listed on pages 7 and 8 of WO97/34485.
  • Preferred surface-active substances are anionic surfactants of the dodecylbenzylsulfonate type, especially the calcium salts thereof, and also non-ionic surfactants of the fatty alcohol ethoxylate type. Special preference is given to ethoxylated C 12 -C 22 fatty alcohols having a degree of ethoxylation of from 5 to 40.
  • surfactants examples include the Genapol types (Clariant). Also preferred are silicone surfactants, especially polyalkyl-oxide-modified heptamethyltrisiloxanes, which are commercially available e.g. as SILWET L-77®, and also perfluorinated surfactants.
  • concentration of surface-active substances in relation to the total additive is generally from 1 to 50 % by weight.
  • oil additives that consist of mixtures of oils or mineral oils or derivatives thereof with surfactants are TURBOCHARGE®, ADIGOR® (both (Syngenta Crop Protection AG), ACTIPRON® (BP Oil UK Limited), AGRI-DEX® (Helena Chemical Company).
  • the said surface-active substances may also be used in the formulations alone, that is to say without oil additives.
  • an organic solvent to the oil additive/surfactant mixture can contribute to a further enhancement of action.
  • Suitable solvents are, for example, SOLVESSO® and AROMATIC® solvents (Exxon Corporation). The concentration of such solvents can be from 10 to 80 % by weight of the total weight.
  • Such oil additives which may be in admixture with solvents, are described, for example, in US 4 834 908.
  • a commercially available oil additive disclosed therein is known by the name MERGE® (BASF).
  • Further oil additives that are preferred according to the invention are SCORE® and ADIGOR® (both Syngenta Crop Protection AG).
  • alkylpyrrolidones e.g. AGRIMAX® from ISP
  • formulations of synthetic latices such as, for example, polyacrylamide, polyvinyl compounds or poly-1-p-menthene (e.g. BOND®, COURIER® or EMERALD®) can also be used.
  • Such adjuvant oils as described in the preceding paragraphs may be employed as the carrier liquid in which an active compound is dissolved, emulsified or dispersed as appropriate to the physical form of the active compound.
  • the pesticidal formulations generally contain from 0.1 to 99 % by weight, especially from 0.1 to 95 % by weight, of a compound of formula I and from 1 to 99.9 % by weight of a formulation adjuvant, which preferably includes from 0 to 25 % by weight of a surface-active substance. Whereas commercial products will preferably be formulated as concentrates, the end user will normally employ dilute formulations.
  • the rate of application of the compounds of formula I may vary within wide limits and depends upon the nature of the soil, the method of application (pre- or post-emergence; seed dressing; application to the seed furrow; no tillage application etc.), the crop plant, the weed or grass to be controlled, the prevailing climatic conditions, and other factors governed by the method of application, the time of application and the target crop.
  • the compounds of formula I according to the invention are generally applied at a rate of 1- 2000 g/ha, preferably 1- 1000 g / ha and most preferably at 1- 500 g / ha.
  • Emulsifiable concentrates active ingredient: 1 to 95 %, preferably 60 to 90 % surface-active agents: 1 to 30 %, preferably 5 to 20 % solvents as liquid carrier: 1 to 80 %, preferably 1 to 35 %
  • Dusts active ingredient: 0.1 to 10 %, preferably 0.1 to 5 % solid carriers: 99.9 to 90 %, preferably 99.9 to 99 %
  • Suspension concentrates active ingredient: 5 to 75 %, preferably 10 to 50 % water: 94 to 24 %, preferably 88 to 30 % surface-active agents: 1 to 40 %, preferably 2 to 30 %
  • Wettable powders active ingredient: 0.5 to 90 %, preferably 1 to 80 % surface-active agents: 0.5 to 20 %, preferably 1 to 15 % solid carriers: 5 to 95 %, preferably 15 to 90 %
  • Granules active ingredient: 0.1 to 30 %, preferably 0.1 to 15 % solid carriers: 99.5 to 70 %,
  • Emulsifiable concentrates a) b) c) d) active ingredient 5% 10% 25% 50% calcium dodecylbenzene- sulfonate 6% 8% 6% 8% castor oil polyglycol ether 4% 4% 4% 4%
  • Emulsions of any desired concentration can be prepared from such concentrates by dilution with water.
  • the solutions are suitable for application undiluted or after dilution with water.
  • Wettable powders a) b) c) d) active ingredient 5% 25% 50% 80% sodium lignosulfonate 4 % - 3 % - sodium lauryl sulfate 2 % 3 % - 4 % sodium diisobutylnaphthalene- sulfonate _ 6 % 5% 6 % octylphenol polyglycol ether - 1 % 2 % -
  • the active ingredient is thoroughly mixed with the adjuvants and the mixture is thoroughly ground in a suitable mill, yielding wettable powders which can be diluted with water to give suspensions of any desired concentration.
  • the active ingredient is dissolved in methylene chloride, the solution is sprayed onto the carrier and the solvent is subsequently evaporated off in vacuo.
  • the finely ground active ingredient is applied uniformly, in a mixer, to the carrier moistened with polyethylene glycol. Non-dusty coated granules are obtained in this manner.
  • the active ingredient is mixed and ground with the adjuvants and the mixture is moistened with water.
  • the resulting mixture is extruded and then dried in a stream of air.
  • the active ingredient is mixed and ground with the adjuvants and the mixture is moistened with water.
  • the resulting mixture is extruded and then dried in a stream of air.
  • Ready-to-use dusts are obtained by mixing the active ingredient with the carriers and grinding the mixture in a suitable mill.
  • Suspension concentrates a) b) c) d) active ingredient 3 % 10 % 25 % 50 % propylene glycol 5 % 5 % 5 % 5 % nonylphenol polyglycol ether - 1 % 2 % -
  • the finely ground active ingredient is intimately mixed with the adjuvants, yielding a suspension concentrate from which suspensions of any desired concentration can be prepared by dilution with water.
  • Crops of useful plants in which the compositions according to the invention can be used include especially cereals, in particular wheat and barley, rice, corn, rape, sugarbeet, sugarcane, soybean, cotton, sunflower, peanut and plantation crops.
  • crops is to be understood as also including crops that have been rendered tolerant to herbicides or classes of herbicides (for example ALS, GS, EPSPS, PPO and HPPD inhibitors) as a result of conventional methods of breeding or genetic engineering.
  • herbicides or classes of herbicides for example ALS, GS, EPSPS, PPO and HPPD inhibitors
  • An example of a crop that has been rendered tolerant e.g. to imidazolinones, such as imazamox, by conventional methods of breeding is Clearfield® summer rape (Canola).
  • crops that have been rendered tolerant to herbicides by genetic engineering methods include e.g. glyphosate- and glufosinate- resistant maize varieties commercially available under the trade names RoundupReady® and LibertyLink®.
  • the weeds to be controlled may be both monocotyledonous and dicotyledonous weeds, such as, for example, Stellaria, Nasturtium, Agrostis, Digitaria, Avena, Setaria, Sinapis, Lolium, Solanum, Echinochloa, Scirpus, Monochoria, Sagittaria, Bromus, Alopecurus, Sorghum, Rottboellia, Cyperus, Abutilon, Sida, Xanthium, Amaranthus, Chenopodium, Ipomoea, Chrysanthemum, Galium, Viola and Veronica.
  • Stellaria Nasturtium, Agrostis, Digitaria, Avena, Setaria, Sinapis, Lolium, Solanum, Echinochloa, Scirpus, Monochoria, Sagittaria, Bromus, Alopecurus, Sorghum, Rottboellia, Cyperus, Abutilon, Sida, Xanthium,
  • Crops are also to be understood as being those which have been rendered resistant to harmful insects by genetic engineering methods, for example Bt maize (resistant to European corn borer), Bt cotton (resistant to cotton boll weevil) and also Bt potatoes (resistant to Colorado beetle).
  • Bt maize resistant to European corn borer
  • Bt cotton resistant to cotton boll weevil
  • Bt potatoes resistant to Colorado beetle
  • Bt maize are the Bt-176 maize hybrids of NK® (Syngenta Seeds).
  • the Bt toxin is a protein that is formed naturally by Bacillus thuringiensis soil bacteria.
  • Examples of toxins and transgenic plants able to synthesise such toxins are described in EP-A-451 878, EP-A-374 753, WO 93/07278, WO 95/34656, WO 03/052073 and EP-A-427 529.
  • Examples of transgenic plants that contain one or more genes which code for an insecticidal resistance and express one or more toxins are KnockOut® (maize), Yield Gard® (maize), NuCOTIN33B® (cotton), Bollgard® (cotton), NewLeaf® (potatoes), NatureGard® and Protexcta®. Plant crops and their seed material can be resistant to herbicides and at the same time also to insect feeding ("stacked" transgenic events).
  • Seed can, for example, have the ability to express an insecticidally active Cry3 protein and at the same time be glyphosate-tolerant.
  • the term "crops" is to be understood as also including crops obtained as a result of conventional methods of breeding or genetic engineering which contain so-called output traits (e.g. improved flavour, storage stability, nutritional content).
  • Areas under cultivation are to be understood as including land where the crop plants are already growing as well as land intended for the cultivation of those crop plants.
  • the compounds of formula I according to the invention can also be used in combination with further herbicides.
  • the compound of the formula I is one of those compounds listed in Tables 1 to 57 below.
  • the following mixtures of the compound of formula I are especially important: compound of formula I + acetochlor, compound of formula I + acifluorfen, compound of formula I + acifluorfen-sodium, compound of formula I + aclonifen, compound of formula I + acrolein, compound of formula I + alachlor, compound of formula I + alloxydim, compound of formula I + allyl alcohol, compound of formula I + ametryn, compound of formula I + amicarbazone, compound of formula I + amidosulfuron, compound of formula I + aminopyralid, compound of formula I + amitrole, compound of formula I + ammonium sulfamate, compound of formula I + anilofos, compound of formula I + asulam, compound of formula I + atraton, compound of formula I
  • the mixing partners for the compound of formula I may also be in the form of esters or salts, as mentioned e.g. in The Pesticide Manual, 12th Edition (BCPC) 2000.
  • compound of formula I + aclonifen compound of formula I + amidosulfuron, compound of formula I + aminopyralid, compound of formula I + beflubutamid, compound of formula I + benfluralin, compound of formula I + bifenox, compound of formula I + bromoxynil, compound of formula I + butafenacil, compound of formula I + carbetamide, compound of formula I + carfentrazone, compound of formula I + carfentrazone-ethyl, compound of formula I + chlorotoluron, compound of formula I + chlorpropham, compound of formula I + chlorsulfuron, compound of formula I + cinidon-ethyl, compound of formula I + clodinafop, compound of formula I + clodinafop-propargyl, compound of formula I + clopyralid, compound of formula I + 2,4-D, compound of formula I + dicamba, compound of formula I + dichlobenil
  • the compounds of formula I according to the invention can also be used in combination with safeners.
  • the compound of the formula I is one of those compounds listed in Tables 1 to 57 below.
  • the following mixtures with safeners especially, come into consideration: compound of formula I + cloquintocet-mexyl, compound of formula I + cloquintocet acid and salts thereof, compound of formula I + fenchlorazole-ethyl, compound of formula I + fenchlorazole acid and salts thereof, compound of formula I + mefenpyr-diethyl, compound of formula I + mefenpyr diacid, compound of formula I + isoxad if en-ethyl, compound of formula I + isoxadifen acid, compound of formula I + furilazole, compound of formula I + furilazole R isomer, compound of formula (I) + N-(2-methoxybenzoyl)-4-[(methylaminocarbonyl)amino
  • Benoxacor, cloquintocet-mexyl, cyprosulfamide, mefenpyr-diethyl and N-(2-methoxybenzoyl)-4- [(methylaminocarbonyl)amino]benzenesulfonamide are especially preferred, where cloquintocet- mexyl is particularly valuable.
  • the rate of application of safener relative to the herbicide is largely dependent upon the mode of application.
  • the herbicidal compositions according to the invention are suitable for all methods of application customary in agriculture, such as, for example, pre-emergence application, post-emergence application and seed dressing.
  • the safeners can be used for pretreating the seed material of the crop plant (dressing the seed or seedlings) or introduced into the soil before or after sowing, followed by the application of the (unsafened) compound of the formula (I), optionally in combination with a co-herbicide. It can, however, also be applied alone or together with the herbicide before or after emergence of the plants. The treatment of the plants or the seed material with the safener can therefore take place in principle independently of the time of application of the herbicide.
  • the treatment of the plant by simultaneous application of herbicide and safener is generally preferred.
  • the rate of application of safener relative to herbicide is largely dependent upon the mode of application.
  • In the case of field treatment generally from 0.001 to 5.0 kg of safener/ha, preferably from 0.001 to 0.5 kg of safener/ha, are applied.
  • seed dressing generally from 0.001 to 10 g of safener/kg of seed, preferably from 0.05 to 2 g of safener/kg of seed, are applied.
  • safener solutions which contain the active ingredient in a concentration of from 1 to 10 000 ppm, preferably from 100 to 1000 ppm. It is preferred to apply the other herbicide together with one of the safeners mentioned above.
  • the following Examples illustrate the invention further but do not limit the invention.
  • Step 1 Preparation of 2-(5-bromo-2-ethylphenyl)cyclohexane-1 ,3-dione
  • Step 2 Preparation of 2-(2-ethyl-5-iodophenyl)cyclohexane-1 ,3-dione
  • reaction mixture is acidified with 2M aqueous hydrochloric acid and extracted with dichloromethane (x 2).
  • the organic phase is separated then evaporated under reduced pressure to yield a crude product which is purified by preparative reverse-phase HPLC to afford 2-[5-(4-chloro-2-fluoro-phenoxy)-2-ethylphenyl]cyclohexane-1 ,3- dione.
  • Step 1 Preparation of 3-(5-bromo-2-ethylphenyl)bicyclo[3.2.1]octane-2,4-dione
  • aqueous phase is further washed with dichloromethane (x 2), and again the phases are separated. All organics are combined then evaporated under reduced pressure to give a crude oil, which is purified by flash column chromatography on silica gel (30% to 50% ethyl acetate/iso-hexane eluant ratio, then 10% methanol/dichloromethane eluant ratio). The resulting gum is then recrystalised from dichloromethane/hexane to afford 3-(5-bromo-2- ethylphenyl)bicyclo[3.2.1]octane-2,4-dione as a cream coloured solid.
  • Step 2 Preparation of meso-(1 R,5S)-3-[5-(4-chlorophenoxy)-2-ethylphenyl]bicyclo[3.2.1]octane- 2,4-dione
  • Step 1 Preparation of rac-3-(5-bromo-2-ethylphenyl)-1 ,8,8-trimethylbicyclo[3.2.1]octane-2,4- dione
  • 5-Bromo-2-ethylphenyllead triacetate (0.673 g, 1 .18 mmol) is added portionwise over 10 minutes, and the mixture is further heated at this temperature for a further 4 hours then left to stand overnight.
  • 2M hydrochloric acid (10 ml) is added, and the resulting biphasic mixture is filtered to remove any inorganic salts (washing with additional dichloromethane, 10 ml).
  • the organic phase separated, and the aqueous phase is extracted again with dichloromethane (10 ml x2). All organic fractions are combined, dried over magnesium sulfate, filtered and the filtrate concentrated under reduced pressure to give an orange gum.
  • This crude product is purified by flash column chromatography on silica gel (100% to 40% hexane/ethyl acetate eluant ratio) to afford /-ac-3-(5-bromo-2-ethylphenyl)-1 ,8,8-trimethylbicyclo[3.2.1]octane-2,4-dione as a colourless gum.
  • Step 2 Preparation of rac-(1 S,5R)-3-[5-(2,4-dichlorophenoxy)-2-ethylphenyl]-1 ,8,8- trimethylbicyclo[3.2.1 ]octane-2,4-dione
  • Step 1 Preparation of 4-(2-ethyl-5-hydroxyphenyl)-2,2,6,6-tetramethylpyran-3,5-dione.
  • the mixture is then cooled to -78 0 C and a solution of n-butyllithium in hexanes (53 ml of a 1.6 M solution, 85.0 mmol) is added dropwise over 20 minutes.
  • the mixture is stirred at -78 0 C for 10 minutes, and then the solution is allowed to warm and stirred for 1 hour and 50 minutes at room temperature.
  • the mixture obtained is added via cannular to a solution of trimethylborate (31.6 ml, 283 mmol) in dry tetrahydrofuran (30 ml) at -78 0 C, and the mixture stirred for 20 minutes, then allowed to warm to room temperature.
  • a further quantity of dry tetrahydrofuran (20 ml) is added to aid stirring, and the mixture is stirred at room temperature for a further 1 hour and 30 minutes.
  • the mixture is cooled to O 0 C and a 30% hydrogen peroxide solution (16 ml, 142 mmol) is added cautiously. The mixture stirred for 10 minutes at O 0 C, then allowed to warm to room temperature and stirred at for 18 hours.
  • the mixture is partitioned between dichloromethane and dilute aqueous hydrochloric acid.
  • the aqueous is extracted with dichloromethane and the organic extracts are combined, washed with brine, dried over anhydrous magnesium sulfate, filtered and the filtrate is concentrated under reduced pressure.
  • the residue is purified by column chromatography on silica gel to give 4-(2- ethyl-5-hydroxyphenyl)-2,2,6,6-tetramethylpyran-3,5-dione.
  • Step 2 Preparation of 4-[5-(3-chloro-4-nitrophenoxy)-2-ethylphenyl]-2,2,6,6-tetramethylpyran-3,5- dione.
  • Step 1 Alternative preparation of 4-(2-ethyl-5-hydroxyphenyl)-2,2,6,6-tetramethylpyran-3,5-dione.
  • Step 2 Preparation of 4-[2-ethyl-5-(6-trifluoromethylpyridin-2-yloxy)phenyl]-2,2,6,6- tetramethylpyran-3,5-dione.
  • Step 1 Preparation of 9-(5-bromo-2-ethylphenyl)-3-oxaspiro[5.5]undecane-8, 10-dione.
  • 3-oxaspiro[5.5]undecane-8,10-dione (50.0 g, 0.275 mol) is added to a solution of sodium carbonate (58.3 g, 0.55 mol) in a mixture of ethanol (175 ml) and water (700 ml), and the mixture is stirred at room temperature until dissolution is complete, and then the mixture is cooled to 5 0 C.
  • lodobenzene diacetate 88.45 g, 0.275 mol
  • the precipitated iodonium ylide is collected by filtration.
  • a portion of the iodonium ylide (2.0 g, 5.21 mmol) is added to a mixture of 2-ethyl-5- bromophenylboronic acid (1 .43 g, 6.25 mmol), palladium(ll) acetate (59 mg, 0.26 mmol) and lithium hydroxide monohydrate (0.656 g, 15.6 mmol) in 1 ,2-dimethoxyethane (40 ml) and water (10 ml), and the mixture is heated at 5O 0 C for 6 hours, and then allowed to stand at room temperature overnight. The mixture is filtered through diatomaceous earth, washing the filter cake with water (50 ml) and ethyl acetate (50 ml).
  • the organic phase is discarded.
  • the aqueous phase is acidified to pH2 by addition of concentrated hydrochloric acid, and then extracted with ethyl acetate.
  • the organic extract is dried over anhydrous magnesium sulfate, filtered and the filtrate is evaporated under reduced pressure.
  • the residue is purified by column chromatography on silica gel to give 9-(5-bromo-2-ethylphenyl)-3-oxaspiro[5.5]undecane-8, 10-dione.
  • Step 2 Preparation of 9-[5-(4-bromo-2-fluorophenoxy)-2-ethylphenyl]-3-oxaspiro[5.5]undecane- 8,10-dione.
  • Step 2 Preparation of 4-[1-(5-bromo-2-cyclopropylphenyl)methylidene]-2, 2,5,5- tetramethyldihydrofuran-3-one
  • Step 3 Preparation of 2-(5-bromo-2-cyclopropylphenyl)-4,4,6,6-tetramethyl-1 ,5- dioxaspiro[2.4]heptan-7-one
  • aqueous phase is then extracted into ethyl acetate (x 2) and the combined organic extracts are washed with saturated aqueous sodium hydrogen carbonate (x 2), brine (500 ml_), then dried over anhydrous magnesium sulfate. Volatile solvents are removed under vacuum to afford 2-(5-bromo-2-cyclopropylphenyl)-4,4,6,6-tetramethyl-1 ,5- dioxaspiro[2.4]heptan-7-one.
  • Step 5 Preparation of 4-[2-cyclopropyl-5-(2,4-dichlorophenoxy)-phenyl]-2,2,6,6-tetramethyl- pyran-3,5-dione
  • reaction mixture is extracted with diethyl ether (x 3), then the organic phase is further washed with saturated aqueous sodium bicarbonate (x 2) then brine. All organics are combined, dried over magnesium sulfate, filtered and the filtrate concentrated in vacuo to afford 2-(5-bromo-2- trifluoromethoxyphenyl)-4,4,6,6-tetramethyl-1 ,5-dioxaspiro[2.4]heptan-7-one (6.34g, 86%) as a yellow oil.
  • Step 4 Preparation of 4-[5-(4-chlorophenoxy)-2-trifluoromethoxyphenyl]-2, 2,6,6- tetramethylpyran-3,5-dione
  • Solvent A H 2 O containing 0.1 % HCOOH
  • Solvent B CH 3 CN containing 0.1 % HCOOH
  • Solvent A H 2 O with 0.05% TFA
  • Solvent B CH 3 CN with 0.05% TFA
  • the characteristic values obtained for each compound were the retention time (rt, recorded in minutes) and the molecular ion (typically the cation MH + ), as listed in Table T1.
  • Table 1 covers compounds of the following type
  • Table 2 covers compounds of the following type
  • Table 3 covers compounds of the following type
  • Table 4 covers compounds of the following type
  • Table 5 covers compounds of the following type wherein A is as defined in Table 1.
  • Table 6 covers compounds of the following type
  • Table 7 covers compounds of the following type
  • Table 8 covers compounds of the following type
  • Table 9 covers compounds of the following type
  • Table 11 covers compounds of the following type
  • Table 12 covers compounds of the following type
  • Table 13 covers compounds of the following type
  • Table 14 covers compounds of the following type
  • Table 15 covers compounds of the following type
  • Table 16 covers compounds of the following type
  • Table 17 covers compounds of the following type
  • Table 18 covers compounds of the following type
  • Table 19 covers compounds of the following type wherein A is as defined in Table 1.
  • Table 20 covers compounds of the following type
  • Table 21 covers compounds of the following type
  • Table 22 covers compounds of the following type
  • Table 23 covers compounds of the following type
  • Table 24 covers compounds of the following type
  • Table 25 covers compounds of the following type
  • Table 26 covers compounds of the following type
  • Table 27 covers compounds of the following type
  • Table 28 covers compounds of the following type wherein A is as defined in Table 1.
  • Table 29 covers compounds of the following type
  • Table 30 covers compounds of the following type
  • Table 31 covers compounds of the following type
  • Table 32 covers compounds of the following type
  • Table 33 covers compounds of the following type wherein A is as defined in Table 1.
  • Table 34 covers compounds of the following type
  • Table 35 covers compounds of the following type
  • Table 36 covers compounds of the following type
  • Table 37 covers compounds of the following type
  • Table 38 covers compounds of the following type wherein A is as defined in Table 1.
  • Table 39 covers compounds of the following type
  • Table 40 covers compounds of the following type
  • Table 41 covers compounds of the following type
  • Table 42 covers compounds of the following type
  • Table 43 covers compounds of the following type
  • Table 44 covers compounds of the following type
  • Table 45 covers compounds of the following type
  • Table 46 covers compounds of the following type
  • Table 47 covers compounds of the following type wherein A is as defined in Table 1.
  • Table 48 covers compounds of the following type
  • Table 49 covers compounds of the following type
  • Table 50 covers compounds of the following type
  • Table 51 covers compounds of the following type
  • Table 52 covers compounds of the following type
  • Table 53 covers compounds of the following type
  • Table 54 covers compounds of the following type
  • Table 55 covers compounds of the following type
  • Table 56 covers compounds of the following type
  • Table 57 covers compounds of the following type
  • LPE Lolium perenne
  • Alopecurus myosuroides Alopecurus myosuroides
  • Echinochloa crus-galli Echinochloa crus-galli
  • AVEFA Avena fatua

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Abstract

Compounds of formula (I), wherein the substituents are as defined in claim 1, are suitable for use as herbicides.

Description

Novel herbicides
The present invention relates to novel, herbicidally active cyclic diones, and derivatives thereof, to processes for their preparation, to compositions comprising those compounds, and to their use in controlling weeds, especially in crops of useful plants, or in inhibiting undesired plant growth.
Cyclic diones having herbicidal action are described, for example, in WO08/071405 and WO08/145336.
Novel cyclic diones, and derivatives thereof, having herbicidal and growth-inhibiting properties have now been found.
The present invention accordingly relates to compounds of formula I
Figure imgf000003_0001
wherein
A is a mono- or bicyclic aryl or heteroaryl which contains a heteroatom selected from nitrogen, oxygen and sulfur, and which is unsubstituted or substituted,
R1 is methyl, ethyl, n-propyl, isopropyl, cyclopropyl, halomethyl, haloethyl, vinyl, propenyl, ethynyl, propynyl, halogen, methoxy, ethoxy, halomethoxy or haloethoxy,
R2 and R3 are independently of each other hydrogen, methyl, ethyl, n-propyl, isopropyl, cyclopropyl, halomethyl, haloethyl, vinyl, propenyl, ethynyl, propynyl, halogen, methoxy, ethoxy, halomethoxy or haloethoxy,
R4, R5, R6 and R7 are independently of each other hydrogen, Ci-C6alkyl, C-ι-C6alkyl substituted by
CrC4alkoxy or halogen, C2-C6 alkenyl, C2-C6 alkenyl substituted by CrC4alkoxy or halogen,
C2-C6alkynyl, C2-C6alkynyl substituted by Ci-C4alkoxy or halogen, C3-C7cycloalkyl, C3-
C7cycloalkyl substituted by CrC4alkyl or Ci-C4alkoxy, C5-C7cycloalkenyl, C5-C7cycloalkenyl substituted by CrC4alkyl or Ci-C4alkoxy, heterocyclyl or heterocyclyl substituted by CrC4alkyl or
Ci-C4alkoxy, or R4 and R5, or R6 and R7, together with the atoms to which they are bonded, form a 5- to 8- membered spiro-carbocyclyl or spiro-heterocyclyl, which contains one or two heteroatoms selected from nitrogen, oxygen or sulfur, or
R5 and R6, together with the atoms to which they are bonded, form a 5- to 8-membered carbocyclyl or heterocyclyl, which contains one or two heteroatoms selected from nitrogen, oxygen or sulfur,
Y is O, S(O)n, C=O, CR8R9 Or CR10R11CR12R13, n is O, 1 or 2,
R8 and R9 are independently of each other hydrogen, CrC6alkyl, CrC6alkyl substituted by d- C4alkoxy or halogen, C2-C6 alkenyl, C2-C6 alkenyl substituted by CrC4alkoxy or halogen, C2-C6alkynyl, C2-C6alkynyl substituted by CrC4alkoxy or halogen, C3-C7cycloalkyl, C3- C7cycloalkyl substituted by CrC4alkyl or CrC4alkoxy, C5-C7cycloalkenyl, C5-C7cycloalkenyl substituted by CrC4alkyl or CrC4alkoxy, heterocyclyl or heterocyclyl substituted by CrC4alkyl or CrC4alkoxy, or
R8 and R9, together with the atoms to which they are bonded, form a 5- to 8-membered spiro- carbocyclyl or spiro-heterocyclyl, which contains one or two heteroatoms selected from nitrogen, oxygen or sulfur, and
R10, R11, R12 and R13 are independently of each other hydrogen, CrCβalkyl or d-Cβalkoxy, and G is hydrogen or an agriculturally acceptable metal, sulfonium, ammonium or latentiating group.
In the substituent definitions of the compounds of the formula I, each alkyl moiety either alone or as part of a larger group (such as alkoxy, alkylthio, alkoxycarbonyl, alkylcarbonyl, alkylaminocarbonyl, dialkylaminocarbonyl) is a straight or branched chain and is, for example, methyl, ethyl, n-propyl, n-butyl, n-pentyl, n-hexyl, isopropyl, n-butyl, sec-butyl, isobutyl, fert-butyl or neopentyl. The alkyl groups are suitably CrCβalkyl groups, but are preferably CrC4alkyl or CrCsalkyl groups, and, more preferably, CrC2alkyl groups.
Alkenyl and alkynyl moieties can be in the form of straight or branched chains, and the alkenyl moieties, where appropriate, can be of either the (E)- or (Z)-configu ration. Examples are vinyl, allyl and propargyl. Alkenyl and alkynyl moieties can contain one or more double and/or triple bonds in any combination. It is understood, that allenyl and alkylinylalkenyl are included in these terms.
Halogen is fluorine, chlorine, bromine or iodine. Haloalkyl groups are alkyl groups which are substituted with one or more of the same or different halogen atoms and are, for example, CF3, CF2CI, CF2H, CCI2H, FCH2, CICH2, BrCH2, CH3CHF, (CHs)2CF, CF3CH2 or CHF2CH2.
In the context of the present specification the term "aryl" refers to ring systems which may be mono- or bicyclic. Examples of such rings include phenyl and naphthyl. A preferred aryl group is phenyl.
The term "heteroaryl" preferably refers to an aromatic ring system containing at least one heteroatom and consisting either of a single ring or of two fused rings. Preferably, single rings will contain up to three and bicyclic systems up to four heteroatoms which will preferably be chosen from nitrogen, oxygen and sulphur. Examples of such groups include furyl, thienyl, pyrrolyl, pyrazolyl, imidazolyl, 1 ,2,3-triazolyl, 1 ,2,4-triazolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, 1 ,2,4-oxadiazolyl, 1 ,3,4-oxadiazolyl, 1 ,2,5-oxadiazolyl, 1 ,2,3-thiadiazolyl, 1 ,2,4-thiadiazolyl, 1 ,3,4-thiadiazolyl, 1 ,2,5-thiadiazolyl, pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, 1 ,2,3-triazinyl, 1 ,2,4-triazinyl, 1 ,3,5-triazinyl, benzofuryl, benzisofuryl, benzothienyl, benzisothienyl, indolyl, isoindolyl, indazolyl, benzothiazolyl, benzisothiazolyl, benzoxazolyl, benzisoxazolyl, benzimidazolyl, 2,1 ,3-benzoxadiazole, quinolinyl, isoquinolinyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, naphthyridinyl, benzotriazinyl, purinyl, pteridinyl and indolizinyl.
The term "heterocyclyl" preferably refers to a non-aromatic preferably monocyclic or bicyclic ring systems containing up to 7 atoms including one or more (preferably one or two) heteroatoms selected from O, S and N. Examples of such rings include tetrahyd ropy ran, 1 ,3-dioxolane, oxetane, tetrahydrofuran, morpholine, thiomorpholine and piperazine.
Cycloalkyl includes preferably cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl. Cycloalkylalkyl is preferentially cyclopropylmethyl. Cycloalkenyl includes preferably cyclopentenyl and cyclohexenyl.
Carbocyclic rings include aryl, cycloalkyl or carbocyclic groups, and cycloalkenyl groups.
When present, the optional substituents on aryl, heteroaryl and carbocycles are preferably selected independently, from halogen, nitro, cyano, rhodano, isothiocyanato, CrCβalkyl, Ci-C6haloalkyl, Ci-C6alkoxy(Ci-C6) alkyl, C2-C6alkenyl, C2-C6haloalkenyl, C2-C6alkynyl, C3- C7cycloalkyl (itself optionally substituted with Ci-Cβalkyl or halogen), C5-7cycloalkenyl (itself - A -
optionally substituted with CrC6alkyl or halogen), hydroxy, Ci-Ci0alkoxy, Ci-Ci0alkoxy(Cr Cio)alkoxy, tri(Ci-C4)alkylsilyl(Ci-C6)alkoxy, Ci-C6alkoxycarbonyl(Ci-Ci0)alkoxy, d- Ciohaloalkoxy, aryl(Ci-C4)alkoxy (where the aryl group is optionally substituted with halogen or C-i-Cβalkyl), C3-C7cycloalkyloxy (where the cycloalkyl group is optionally substituted with d- C6alkyl or halogen), C3-Ci0alkenyloxy, C3-Ci0alkynyloxy, mercapto, CrCi0alkylthio, d- Ciohaloalkylthio, aryl(CrC4)alkylthio, C3-C7cycloalkylthio (where the cycloalkyl group is optionally substituted with C-i-Cβalkyl or halogen), tri(Ci-C4)-alkylsilyl(Ci-C6)alkylthio, arylthio, d- Cβalkylsulfonyl, CrCβhaloalkylsulfonyl, CrCβalkylsulfinyl, CrCβhaloalkylsulfinyl, arylsulfonyl, tri(Ci-C4)alkylsilyl, aryldi(CrC4)alkylsilyl, CrC4alkyldiarylsilyl, triarylsilyl, CrCioalkylcarbonyl, HO2C, CrCioalkoxycarbonyl, aminocarbonyl, d-Cealkylaminocarbonyl, di(d-C6alkyl)- aminocarbonyl, /V-(CrC3 alkyl)-Λ/-(CrC3alkoxy)aminocarbonyl, d-Cβalkylcarbonyloxy, arylcarbonyloxy, di(CrC6)alkylaminocarbonyloxy, aryl (itself optionally substituted with d-Cβalkyl or halogen), heteroaryl (itself optionally substituted with CrCβalkyl or halogen), heterocyclyl (itself optionally substituted with CrCβalkyl or halogen), aryloxy (where the aryl group is optionally substituted with CrCβalkyl or halogen), heteroaryloxy (where the heteroaryl group is optionally substituted with CrCβalkyl or halogen), heterocyclyloxy (where the heterocyclyl group is optionally substituted with CrCβalkyl or halogen), amino, CrCealkylamino, di(CrC6)alkylamino, d-Cealkylcarbonylamino, Λ/-(CrC6)alkylcarbonyl-Λ/-(CrC6)alkylamino, arylcarbonyl, (where the aryl group is itself optionally substituted with halogen or CrCβalkyl) or two adjacent positions on an aryl or heteroaryl system may be cyclised to form a 5, 6 or 7 membered carbocyclic or heterocyclic ring, itself optionally substituted with halogen or Ci-Cβalkyl. Further substituents for aryl or heteroaryl include arylcarbonylamino (where the aryl group is substituted by CrCβalkyl or halogen), (Ci-Cejalkoxycarbonylamino, (Ci-C6)alkoxycarbonyl-Λ/-(CrC6)alkylamino, aryloxycarbonylamino (where the aryl group is substituted by CrCβalkyl or halogen), aryloxycarbonyl-Λ/-(CrC6)alkylamino, (where the aryl group is substituted by CrCβalkyl or halogen), arylsulphonylamino (where the aryl group is substituted by CrCβalkyl or halogen), arylsulphonyl-Λ/-(CrC6)alkylamino (where the aryl group is substituted by Ci-C6alkyl or halogen), aryl-N-(Ci-C6)alkylamino (where the aryl group is substituted by CrCβalkyl or halogen), arylamino (where the aryl group is substituted by CrCβalkyl or halogen), heteroaryl amino (where the heteroaryl group is substituted by CrCβalkyl or halogen), heterocyclylamino (where the heterocyclyl group is substituted by Ci-C6alkyl or halogen), aminocarbonylamino, d- Cβalkylaminocarbonylamino, di(Ci-C6)alkylaminocarbonylamino, arylaminocarbonylamino where the aryl group is substituted by CrCβalkyl or halogen), aryl-Λ/- (CrCβJalkylaminocarbonylamino where the aryl group is substituted by CrCβalkyl or halogen), CrC6alkylaminocarbonyl-Λ/-(d- Cβjalkylamino, di(CrC6)alkylaminocarbonyl-Λ/-( d-CβJalkylamino, arylaminocarbonyl-Λ/-(d- Cβjalkylamino where the aryl group is substituted by CrCβalkyl or halogen) and aryl-Λ/-(d- C6)alkylaminocarbonyl-N-(Ci-C6)alkylaιmino where the aryl group is substituted by CrC6alkyl or halogen).
The invention relates also to the agriculturally acceptable salts which the compounds of formula I are able to form with transition metal, alkali metal and alkaline earth metal bases, amines, quaternary ammonium bases or tertiary sulfonium bases.
Among the transition metal, alkali metal and alkaline earth metal salt formers, special mention should be made of the hydroxides of copper, iron, lithium, sodium, potassium, magnesium and calcium, and preferably the hydroxides, bicarbonates and carbonates of sodium and potassium.
Examples of amines suitable for ammonium salt formation include ammonia as well as primary, secondary and tertiary Ci-Cisalkylamines, Ci-C4hydroxyalkylamines and C2-C4alkoxyalkyl- amines, for example methylamine, ethylamine, n-propylamine, isopropylamine, the four butylamine isomers, n-amylamine, isoamylamine, hexylamine, heptylamine, octylamine, nonylamine, decylamine, pentadecylamine, hexadecylamine, heptadecylamine, octadecylamine, methylethylamine, methylisopropylamine, methylhexylamine, methylnonylamine, methylpentadecylamine, methyloctadecylamine, ethylbutylamine, ethylheptylamine, ethyloctylamine, hexylheptylamine, hexyloctylamine, dimethylamine, diethylamine, di-n- propylamine, di-isopropylamine, di-n-butylamine, di-n-amylamine, di-isoamylamine, dihexylamine, diheptylamine, dioctylamine, ethanolamine, n-propanolamine, isopropanolamine, N, N- diethanolamine, Λ/-ethylpropanolamine, Λ/-butylethanolamine, allylamine, n-but-2-enylamine, n- pent-2-enylamine, 2,3-dimethylbut-2-enylamine, dibut-2-enylamine, n-hex-2-enylamine, propylenediamine, trimethylamine, triethylamine, tri-n-propylamine, tri-isopropylamine, tri-n- butylamine, tri-isobutylamine, tri-sec-butylamine, tri-n-amylamine, methoxyethylamine and ethoxyethylamine; heterocyclic amines, for example pyridine, quinoline, isoquinoline, morpholine, piperidine, pyrrolidine, indoline, quinuclidine and azepine; primary arylamines, for example anilines, methoxyanilines, ethoxyanilines, o-, m- and p-toluidines, phenylenediamines, benzidines, naphthylamines and o-, m- and p-chloroanilines; but especially triethylamine, isopropylamine and di-isopropylamine.
Preferred quaternary ammonium bases suitable for salt formation correspond, for example, to the formula [N(R3 Rb Rc Rd)]OH, wherein R3, Rb, Rc and Rd are each independently of the others hydrogen, Ci-C4alkyl. Further suitable tetraalkylammonium bases with other anions can be obtained, for example, by anion exchange reactions. Preferred tertiary sulfonium bases suitable for salt formation correspond, for example, to the formula [SReRfRg]OH, wherein Re, Rf and R9 are each independently of the others C1-C4 alkyl. Trimethylsulfonium hydroxide is especially preferred. Suitable sulfonium bases may be obtained from the reaction of thioethers, in particular dialkylsulfides, with alkylhalides, followed by conversion to a suitable base, for example a hydroxide, by anion exchange reactions.
It should be understood that in those compounds of formula I, where G is a metal, ammonium or sulfonium as mentioned above and as such represents a cation, the corresponding negative charge is largely delocalised across the 0-C=C-C=O unit.
The compounds of formula I according to the invention also include hydrates which may be formed during the salt formation.
The latentiating groups G are selected to allow its removal by one or a combination of biochemical, chemical or physical processes to afford compounds of formula I where G is H before, during or following application to the treated area or plants. Examples of these processes include enzymatic cleavage, chemical hydrolysis and photoloysis. Compounds bearing such groups G may offer certain advantages, such as improved penetration of the cuticula of the plants treated, increased tolerance of crops, improved compatibility or stability in formulated mixtures containing other herbicides, herbicide safeners, plant growth regulators, fungicides or insecticides, or reduced leaching in soils.
The latentiating group G is preferably selected from the groups CrC8alkyl, C2-C8haloalkyl, phenylC-i-Csalkyl (wherein the phenyl may optionally be substituted by C-ι-C3alkyl, C-ι-C3haloalkyl, CrCsalkoxy, C-ι-C3haloalkoxy, C-ι-C3alkylthio, C-ι-C3alkylsulfinyl, Ci-C3alkylsulfonyl, halogen, cyano or by nitro), heteroaryld-Csalkyl (wherein the heteroaryl may optionally be substituted by CrC3alkyl, CrC3haloalkyl, CrC3alkoxy, CrC3haloalkoxy, CrC3alkylthio, CrC3alkylsulfinyl, CrC3 alkylsulfonyl, halogen, cyano or by nitro), C3-Csalkenyl, C3-Cshaloalkenyl, C3-Csalkynyl, C(Xa)-Ra, C(Xb)-Xc-Rb, C(Xd)-N(Rc)-Rd, -SO2-Re, -P(Xe)(Rf)-R9 or CH2-Xf-Rh wherein Xa, Xb, Xc, Xd, Xe and Xf are independently of each other oxygen or sulfur;
Ra is H, CrCi8alkyl, C2-Ci8alkenyl, C2-Ci8alkynyl, Ci-Ciohaloalkyl, CrCi0cyanoalkyl, Cr C-ionitroalkyl, Ci-C-ioaminoalkyl, Ci-C5alkylamino(Ci-C5)alkyl, C2-C8dialkylamino(Ci-C5)alkyl, C3- C7cycloalkyl(CrC5)alkyl, Ci-C5alkoxy(Ci-C5)alkyl, C3-C5alkenyloxy(CrC5)alkyl, C3-(Cr C5)oxyalkyl, Ci-C5alkylthio(Ci-C5)alkyl, Ci-C5alkylsulfinyl(Ci-C5)alkyl, Ci-C5alkylsulfonyl(Cr C5)alkyl, C2-C8alkylideneaminoxy(Ci-C5)alkyl, Ci-C5alkylcarbonyl(Ci-C5)alkyl, Cr C5alkoxycarbonyl(CrC5)alkyl, aminocarbonyl(Ci-C5)alkyl, Ci-C5alkylaminocarbonyl(Ci-C5)alkyl, C2-C8dialkylaminocarbonyl(Ci-C5)alkyl, Ci-C5alkylcarbonylamino(Ci-C5)alkyl, N-(Cr C5)alkylcarbonyl-Λ/-(Ci-C5)alkylamino(Ci-C5)alkyl, C3-C6trialkylsilyl(Ci-C5)alkyl, phenyl(CrC5)alkyl (wherein the phenyl may optionally be substituted by Ci-C3alkyl, Ci-C3haloalkyl, Ci-Csalkoxy, d- C3haloalkoxy, Ci-C3alkylthio, Ci-C3alkylsulfinyl, Ci-C3alkylsulfonyl, halogen, cyano, or by nitro), heteroaryl(CrC5)alkyl, (wherein the heteroaryl may optionally be substituted by CrC3alkyl, d- C3haloalkyl, CrC3alkoxy, CrC3haloalkoxy, CrC3alkylthio, CrC3alkylsulfinyl, CrC3alkylsulfonyl, halogen, cyano, or by nitro), C2-C5haloalkenyl, C3-C8cycloalkyl, phenyl or phenyl substituted by Ci-C3alkyl, Ci-C3haloalkyl, Ci-C3alkoxy, Ci-C3haloalkoxy, halogen, cyano or nitro, heteroaryl or heteroaryl substituted by CrC3 alkyl, CrC3haloalkyl, Ci-C3alkoxy, CrC3haloalkoxy, halogen, cyano or nitro,
Rb is CrCisalkyl, C3-Cisalkenyl, C3-Cisalkynyl, C2-Ciohaloalkyl, d-Ciocyanoalkyl, d- Cionitroalkyl, C2-Ci0aminoalkyl, Ci-C5alkylamino(CrC5)alkyl, C2-C8dialkylamino(CrC5)alkyl, C3- C7cycloalkyl(CrC5)alkyl, Ci-C5alkoxy(CrC5)alkyl, C3-C5alkenyloxy(CrC5)alkyl, C3- C5alkynyloxy(CrC5)alkyl, Ci-C5alkylthio(CrC5)alkyl, Ci-C5alkylsulfinyl(Ci-C5)alkyl, Cr C5alkylsulfonyl(CrC5)alkyl, C2-C8alkylideneaminoxy(CrC5)alkyl, Ci-C5alkylcarbonyl(CrC5)alkyl, Ci-C5alkoxycarbonyl(CrC5)alkyl, aminocarbonyl(d-C5)alkyl, Ci-C5alkylaminocarbonyl(Cr C5)alkyl, C2-C8dialkylaminocarbonyl(CrC5)alkyl, Ci-C5alkylcarbonylamino(CrC5)alkyl, N-(Cr C5)alkylcarbonyl-Λ/-(Ci-C5)alkylamino(CrC5)alkyl, C3-C6trialkylsilyl(CrC5)alkyl, phenyl(CrC5)alkyl (wherein the phenyl may optionally be substituted by CrC3alkyl, Ci-C3haloalkyl, Ci-C3alkoxy, d- C3haloalkoxy, CrC3alkylthio, CrC3alkylsulfinyl, Ci-C3alkylsulfonyl, halogen, cyano, or by nitro), heteroarylCi-C5alkyl, (wherein the heteroaryl may optionally be substituted by Ci-C3alkyl, d- C3haloalkyl, Ci-C3alkoxy, CrC3haloalkoxy, CrC3alkyl-thio, CrC3alkylsulfinyl, Ci-C3alkylsulfonyl, halogen, cyano, or by nitro), C3-C5haloalkenyl, C3-C8cycloalkyl, phenyl or phenyl substituted by Ci-C3alkyl, Ci-C3haloalkyl, Ci-C3alkoxy, Ci-C3haloalkoxy, halogen, cyano or nitro, heteroaryl or heteroaryl substituted by CrC3 alkyl, Ci-C3haloalkyl, Ci-C3alkoxy, CrC3haloalkoxy, halogen, cyano or nitro,
Rc and Rd are each independently of each other hydrogen, d-CiOalkyl, C3-Ci0alkenyl, C3- Cioalkynyl, C2-Ci0haloalkyl, d-Ciocyanoalkyl, d-Ci0nitroalkyl, d-Cioaminoalkyl, d- C5alkylamino(CrC5)alkyl, C2-C8dialkylamino(CrC5)alkyl, C3-C7cycloalkyl(CrC5)alkyl, Cr C5alkoxy(CrC5)alkyl, C3-C5alkenyloxy(CrC5)alkyl, C3-C5alkynyloxy(CrC5)alkyl, Cr C5alkylthio(CrC5)alkyl, Ci-C5alkylsulfinyl(CrC5)alkyl, Ci-C5alkylsulfonyl(CrC5)alkyl, C2- C8alkylideneaminoxy(Ci-C5)alkyl, Ci-C5alkylcarbonyl(CrC5)alkyl, Ci-C5alkoxycarbonyl(Cr C5)alkyl, aminocarbonyl(Ci-C5)alkyl, Ci-C5alkylaminocarbonyl(CrC5)alkyl, C2- C8dialkylaminocarbonyl(Ci-C5)alkyl, Ci-C5alkylcarbonylamino(CrC5)alkyl, N-(Cr C5)alkylcarbonyl-Λ/-(C2-C5)alkylaminoalkyl, C3-C6trialkylsilyl(C1-C5)alkyl> phenyl(CrC5)alkyl (wherein the phenyl may optionally be substituted by CrC3alkyl, Ci-C3haloalkyl, Ci-C3alkoxy, Cr C3haloalkoxy, Ci-C3alkylthio, Ci-C3alkylsulfinyl, Ci-C3alkylsulfonyl, halogen, cyano, or by nitro), heteroaryl(CrC5)alkyl, (wherein the heteroaryl may optionally be substituted by CrC3alkyl, d- C3haloalkyl, Ci-C3alkoxy, Ci-C3haloalkoxy, Ci-C3alkylthio, Ci-C3alkylsulfinyl, Ci-C3alkylsulfonyl, halogen, cyano, or by nitro), C2-C5haloalkenyl, C3-C8cycloalkyl, phenyl or phenyl substituted by d-C3alkyl, CrC3haloalkyl, d-C3alkoxy, d-C3haloalkoxy, halogen, cyano or nitro, heteroaryl or heteroaryl substituted by d-C3alkyl, d-C3haloalkyl, CrC3alkoxy, Ci-C3haloalkoxy, halogen, cyano or nitro, heteroarylamino or heteroarylamino substituted by d-C3alkyl, d-C3haloalkyl, d- C3alkoxy, CrC3haloalkoxy, halogen, cyano or nitro, diheteroarylamino or diheteroarylamino substituted by Ci-C3alkyl, d-C3haloalkyl, CrC3alkoxy, Ci-C3haloalkoxy, halogen, cyano or nitro, phenylamino or phenylamino substituted by d-C3alkyl, d-C3haloalkyl, CrC3alkoxy, d- C3haloalkoxy, halogen, cyano or by nitro, diphenylamino or diphenylamino substituted by d- C3alkyl, Ci-C3haloalkyl, d-C3alkoxy, CrC3haloalkoxy, halogen, cyano or by nitro or C3- dcycloalkylamino, di-C3-C7cycloalkylamino or C3-dcycloalkoxy or Rc and Rd may join together to form a 3-7 membered ring, optionally containing one heteroatom selected from O or S, Re is d-doalkyl, C2-doalkenyl, C2-doalkynyl, CrCiohaloalkyl, d-docyanoalkyl, d- Cionitroalkyl, Ci-Cioaminoalkyl, Ci-C5alkylamino(Ci-C5)alkyl, C2-C8dialkylamino(Ci-C5)alkyl, C3- C7cycloalkyl(Ci-C5)alkyl, Ci-C5alkoxy(Ci-C5)alkyl, C3-C5alkenyloxy(Ci-C5)alkyl, C3- C5alkynyloxy(CrC5)alkyl, Ci-C5alkylthio(Ci-C5)alkyl, Ci-C5alkylsulfinyl(Ci-C5)alkyl, Cr C5alkylsulfonyl(Ci-C5)alkyl, C2-C8alkylideneaminoxy(Ci-C5)alkyl, Ci-C5alkylcarbonyl(Ci-C5)alkyl, Ci-C5alkoxycarbonyl(Ci-C5)alkyl, aminocarbonyl(d-C5)alkyl, Ci-C5alkylaminocarbonyl(Ci- C5)alkyl, C2-C8dialkylaminocarbonyl(Ci-C5)alkyl, Ci-C5alkylcarbonylamino(Ci-C5)alkyl, N-(Cr C5)alkylcarbonyl-Λ/-(Ci-C5)alkylamino(Ci-C5)alkyl, C3-C6trialkylsilyl(CrC5)alkyl, phenyl(CrC5)alkyl (wherein the phenyl may optionally be substituted by Ci-C3alkyl, Ci-C3haloalkyl, Ci-C3alkoxy, d- C3haloalkoxy, CrC3alkylthio, CrC3alkylsulfinyl, Ci-C3alkylsulfonyl, halogen, cyano, or by nitro), heteroaryl(Ci-C5)alkyl (wherein the heteroaryl may optionally be substituted by CrC3alkyl, d- C3haloalkyl, Ci-C3alkoxy, CrC3haloalkoxy, CrC3alkylthio, CrC3alkylsulfinyl, Ci-C3alkylsulfonyl, halogen, cyano, or by nitro), C2-C5haloalkenyl, C3-C8cycloalkyl, phenyl or phenyl substituted by Ci-C3alkyl, Ci-C3haloalkyl, Ci-C3alkoxy, Ci-C3haloalkoxy, halogen, cyano or nitro, heteroaryl or heteroaryl substituted by CrC3alkyl, Ci-C3haloalkyl, Ci-C3alkoxy, CrC3haloalkoxy, halogen, cyano or by nitro, heteroarylamino or heteroarylamino substituted by CrC3 alkyl, Ci-C3haloalkyl, CrC3alkoxy, CrC3haloalkoxy, halogen, cyano or by nitro, diheteroarylamino or diheteroarylamino substituted by Ci-C3alkyl, Ci-C3haloalkyl, Ci-C3alkoxy, Ci-C3haloalkoxy, halogen, cyano or nitro, phenylamino or phenylamino substituted by CrC3alkyl, Ci-C3haloalkyl, Ci-C3alkoxy, d- C3haloalkoxy, halogen, cyano or nitro, diphenylamino, or diphenylamino substituted by d- C3alkyl, Ci-C3haloalkyl, Ci-C3alkoxy, Ci-C3haloalkoxy, halogen, cyano or nitro, or C3- C7cycloalkylamino, diC3-C7cycloalkylamino or C3-C7cycloalkoxy, Ci-Ci0alkoxy, Ci-Ciohaloalkoxy, CrC5alkylamino or C2-C8dialkylamino,
Rf and R9 are are each independently of each other Ci-Cioalkyl, C2-Cioalkenyl, C2-Cioalkynyl, Cr Cioalkoxy, CrCiohaloalkyl, Ci-Ciocyanoalkyl, Ci-Cionitroalkyl, d-Cioaminoalkyl, Cr C5alkylamino(Ci-C5)alkyl, C2-C8dialkylamino(Ci-C5)alkyl, C3-C7cycloalkyl(Ci-C5)alkyl, Cr C5alkoxy(CrC5)alkyl, C3-C5alkenyloxy(Ci-C5)alkyl, C3-C5alkynyloxy(Ci-C5)alkyl, Cr C5alkylthio(CrC5)alkyl, Ci-C5alkylsulfinyl(Ci-C5)alkyl, Ci-C5alkylsulfonyl(Ci-C5)alkyl, C2- C8alkylideneaminoxy(Ci-C5)alkyl, Ci-C5alkylcarbonyl(Ci-C5)alkyl, Ci-C5alkoxycarbonyl(Cr C5)alkyl, aminocarbonyl(Ci-C5)alkyl, Ci-C5alkylaminocarbonyl(Ci-C5)alkyl, C2- C8dialkylaminocarbonyl(Ci-C5)alkyl, Ci-C5alkylcarbonylamino(Ci-C5)alkyl, /V-(Cr C5)alkylcarbonyl-Λ/-(C2-C5)alkylaminoalkyl, C3-C6trialkylsilyl(Ci-C5)alkyl, phenyl(CrC5)alkyl (wherein the phenyl may optionally be substituted by CrC3alkyl, CrC3haloalkyl, Ci-C3alkoxy, Cr C3haloalkoxy, CrC3alkylthio, CrC3alkylsulfinyl, Ci-C3alkylsulfonyl, halogen, cyano, or by nitro), heteroaryl(CrC5)alkyl (wherein the heteroaryl may optionally be substituted by CrC3alkyl, Cr C3haloalkyl, Ci-C3alkoxy, CrC3haloalkoxy, CrC3alkylthio, CrC3alkylsulfinyl, Ci-C3alkylsulfonyl, halogen, cyano, or by nitro), C2-C5haloalkenyl, C3-C8cycloalkyl, phenyl or phenyl substituted by Ci-C3alkyl, Ci-C3haloalkyl, Ci-C3alkoxy, Ci-C3haloalkoxy, halogen, cyano or nitro, heteroaryl or heteroaryl substituted by CrC3 alkyl, Ci-C3haloalkyl, Ci-C3alkoxy, CrC3haloalkoxy, halogen, cyano or by nitro, heteroarylamino or heteroarylamino substituted by CrC3 alkyl, Ci-C3haloalkyl, CrC3alkoxy, CrC3haloalkoxy, halogen, cyano or by nitro, diheteroarylamino or diheteroarylamino substituted by CrC3 alkyl, CrC3haloalkyl, Ci-C3alkoxy, CrC3haloalkoxy, halogen, cyano or nitro, phenylamino or phenylamino substituted by CrC3alkyl, Ci-C3haloalkyl, Ci-C3alkoxy, Cr C3haloalkoxy, halogen, cyano or nitro, diphenylamino, or diphenylamino substituted by Cr C3alkyl, CrC3haloalkyl, Ci-C3alkoxy, CrC3haloalkoxy, halogen, cyano or nitro, or C3- C7cycloalkylamino, diC3-C7cycloalkylamino or C3-C7cycloalkoxy, CrCiohaloalkoxy, Cr C5alkylamino or CrCsdialkylamino, benzyloxy or phenoxy, wherein the benzyl and phenyl groups may in turn be substituted by CrC3alkyl, CrC3haloalkyl, Ci-C3alkoxy, CrC3haloalkoxy, halogen, cyano or nitro, and
Rh is CrC-ioalkyl, C3-Cioalkenyl, C3-Cioalkynyl, d-Ciohaloalkyl, Ci-Ciocyanoalkyl, Cr Cionitroalkyl, C2-Cioaminoalkyl, Ci-C5alkylamino(CrC5)alkyl, C2-C8dialkylamino(Ci-C5)alkyl, C3- C7cycloalkyl(CrC5)alkyl, Ci-C5alkoxy(CrC5)alkyl, C3-C5alkenyloxy(CrC5)alkyl, C3- C5alkynyloxy(CrC5)alkyl, Ci-C5alkylthio(CrC5)alkyl, Ci-C5alkylsulfinyl(CrC5)alkyl, Cr C5alkylsulfonyl(CrC5)alkyl, C2-C8alkylideneaminoxy(CrC5)alkyl, Ci-C5alkylcarbonyl(CrC5)alkyl, Ci-C5alkoxycarbonyl(CrC5)alkyl, aminocarbonyl(Ci-C5)alkyl, Ci-C5alkylaminocarbonyl(Cr C5)alkyl, C2-C8dialkylaminocarbonyl(CrC5)alkyl, Ci-C5alkylcarbonylamino(CrC5)alkyl, /V-(Cr C5)alkylcarbonyl-Λ/-(Ci-C5)alkylamino(CrC5)alkyl, C3-C6trialkylsilyl(CrC5)alkyl, phenyl(CrC5)alkyl (wherein wherein the phenyl may optionally be substituted by CrC3alkyl, Ci-C3haloalkyl, Cr C3alkoxy, CrC3haloalkoxy, CrC3alkylthio, CrC3alkylsulfinyl, CrC3 alkylsulfonyl, halogen, cyano or by nitro), heteroaryl(CrC5)alkyl (wherein the heteroaryl may optionally be substituted by Cr C3alkyl, CrC3haloalkyl, CrC3alkoxy, CrC3haloalkoxy, CrC3alkylthio, CrC3alkylsulfinyl, C1-C3 alkylsulfonyl, halogen, cyano or by nitro), phenoxy(CrC5)alkyl (wherein wherein the phenyl may optionally be substituted by CrC3alkyl, CrC3haloalkyl, Ci-C3alkoxy, CrC3haloalkoxy, Cr C3alkylthio, CrC3alkylsulfinyl, CrC3 alkylsulfonyl, halogen, cyano or by nitro), heteroaryloxy(Cr C5)alkyl (wherein the heteroaryl may optionally be substituted by CrC3alkyl, CrC3haloalkyl, d- C3alkoxy, CrC3haloalkoxy, CrC3alkylthio, CrC3alkylsulfinyl, CrC3 alkylsulfonyl, halogen, cyano or by nitro), C3-C5haloalkenyl, C3-C8cycloalkyl, phenyl or phenyl substituted by CrC3alkyl, Cr C3haloalkyl, Ci-C3alkoxy, CrC3haloalkoxy, halogen or by nitro, or heteroaryl, or heteroaryl substituted by CrC3alkyl, CrC3haloalkyl, Ci-C3alkoxy, CrC3haloalkoxy, halogen, cyano or by nitro.
In particular, the latentiating group G is a group -C(Xa)-Ra or -C(Xb)-Xc-Rb, and the meanings of Xa, Ra, Xb, Xc and Rb are as defined above.
It is preferred that G is hydrogen, an alkali metal or alkaline earth metal, where hydrogen is especially preferred.
Depending on the nature of the substituents, compounds of formula I may exist in different isomeric forms. For example, when G is hydrogen and R4 and R5 are different from R6 and R7, compounds of formula I may exist in different tautomeric forms:
Figure imgf000012_0001
This invention covers all such isomers and tautomers and mixtures thereof in all proportions. Also, when substituents contain double bonds, cis- and frans-isomers can exist. These isomers, too, are within the scope of the claimed compounds of the formula I.
Preferably, in the compounds of formula I, A is phenyl, naphthyl, a 5- or 6-membered heteroaryl or a bicyclic 8- to 10-membered heteroaryl. Preferably, in the compounds of formula I, A is substituted by halogen, Ci-C4alkyl, CrC4haloalkyl, C2-C4alkenyl, C2-C4haloalkenyl, C2-C4alkynyl, Ci-C4alkoxy, CrC4haloalkoxy, CrC4alkylthio, CrC4alkylsulfinyl, Ci-C4alkylsulfonyl, Ci-C4haloalkylthio, Ci-C4haloalkylsulfinyl, Ci-C4haloalkylsulfonyl, nitro, cyano, Cs-Cβcycloalkyl, d-Csalkylcarbonyl, Ci-C4alkoxycarbonyl, aminocarbonyl, d-Csalkylaminocarbonyl, di-CrCsalkylaminocarbonyl, d- Csalkylaminocarbonyloxy, di-CrCsalkylaminocarbonyloxy, aminothiocarbonyl, d- Csalkylaminothiocarbonyl, did-Csalkylaminothiocarbonyl, d-dalkylcarbonylamino, C3- Cβcycloalkylcarbonylamino, Ci-dalkoxycarbonylamino,Crdalkylthiocarbonylamino, d- C3alkoxyCi-C3alkyl, d-C6alkylthiod-C6alkyl, CrCealkylsulfinyld-Cealkyl, Ci-C6alkylsulfonylCr Cβalkyl, Ci-C3alkylsulfonyloxy, d-Cshaloalkylsulfonyloxy or diCi-Cβalkylaminosulfonyl, or 2 substituents on adjacent carbon atoms of A together form a Cβ-dalkylene, wherein 1 or 2 methylene groups are optionally substituted by halogen, or wherein 1 or 2 of these methylene groups are replaced by oxygen.
More preferably, A is phenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, benzothiazolyl, benzoxazolyl, cinnolinyl, quinolinyl, quinazolinyl, quinoxalinyl or benzotriazinyl in each case substituted by halogen, methyl, ethyl, trifluorom ethyl, methoxy, difluoromethoxy, trifluoromethoxy, nitro or cyano.
Preferably, R1 is methyl, ethyl, n-propyl, cyclopropyl, halogen or d-C2haloalkoxy.
Preferably, R2 and R3 are independently of each other hydrogen, methyl or halogen, especially hydrogen.
Preferably, R4, R5, R6 and R7 are independently of each other hydrogen or d-Cβalkyl, or R4 and R5, or R6 and R7, together with the atoms to which they are bonded form a spiro- tetrahydropyranyl or spiro-tetrahydrofuranyl, or R5 and R6 together with the atoms to which they are bonded form a 6- or 7-membered carbocyclyl.
Preferably, Y is O or CR8R9, where R8 and R9 are as defined above.
Preferably, R8 and R9 are independently of each other hydrogen or methyl, or R8 and R9 together with the atoms to which they are bonded form a spiro-tetrahydropyranyl or a spiro- tetrahydrofuranyl. Preferably, G is hydrogen, a group -C(Xa)-Ra or -C(Xb)-Xc-Rb, where the meanings of Xa, Ra, Xb, Xc and Rb are as defined above, and particularly hydrogen.
In a particularly preferred group of compounds of formula I A is phenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, benzothiazolyl, benzoxazolyl, cinnolinyl, quinolinyl, quinazolinyl, quinoxalinyl or benzotriazinlyl, in each case substituted by halogen, methyl, trifluorom ethyl, nitro or cyano, R1 is ethyl, R2 and R3 are hydrogen, R4 to R7 are hydrogen or methyl or R5 and R6, together with the atoms to which they are bonded, form a 6- or 7-membered carbocyclyl, Y is O or CR8R9, wherein R8 and R9 are independently of each other hydrogen or methyl, or R8 and R9 together with the atoms to which they are bonded form a spiro-tetrahydropyranyl or a spiro-tetrahydrofuranyl, and G is hydrogen.
In another particularly preferred group of compounds of formula (I), R1 is methyl, ethyl or cyclopropyl, R2 and R3 are hydrogen, R4, R5, R6 and R7 are independently of each other hydrogen or methyl, or R4 and R5, or R6 and R7, together with the atoms to which they are bonded form a spiro-tetrahydropyranyl or spiro-tetrahydrofuranyl, or R5 and R6 together with the atoms to which they are bonded form a 6- or 7-membered carbocyclyl, Y is O or CR8R9, where R8 and R9 are independently of each other hydrogen or methyl, or R8 and R9 together with the atoms to which they are bonded form a spiro-tetrahydropyranyl or a spiro-tetrahydrofuranyl, G is hydrogen and A is phenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, benzothiazolyl, benzoxazolyl, quinolinyl or quinoxalinyl , in each case unsubstituted or substituted by hydroxyl, methoxy, ethoxy, fluoro, chlro, bromo, iodo, methyl, trifluorom ethyl, amino, formyl, nitro or cyano.
A compound of formula I wherein Q is Qi and G is CrC8alkyl, C2-C8haloalkyl, phenylCrC8alkyl (wherein the phenyl may optionally be substituted by C-ι-C3alkyl, C-ι-C3haloalkyl, Ci-Csalkoxy, Cr C3haloalkoxy, CrC3alkylthio, CrC3alkylsufinyl, Ci-C3alkylsulfonyl, halogen, cyano or by nitro), heteroarylC-i-Csalkyl (wherein the heteroaryl may optionally be substituted by CrC3alkyl, Cr C3haloalkyl, CrC3alkoxy, CrC3haloalkoxy, CrC3alkylthio, Ci-C3alkylsufinyl, Ci-C3alkylsulfonyl, halogen, cyano or by nitro), C3-C8alkenyl, C3-C8haloalkenyl, C3-C8alkynyl, C(Xa)-Ra, C(Xb)-Xc-Rb, C(Xd)-N(Rc)-Rd, -SO2-Re, -P(Xe)(Rf)-R9 or CH2-Xf-Rh where Xa, Xb, Xc, Xd, Xe, Xf, Ra, Rb, Rc, Rd, Re, Rf, R9 and Rh are as defined above may be prepared by treating a compound of formula (A), which is a compound of formula I wherein G is H, with a reagent G-Z, wherein G-Z is an alkylating agent such as an alkyl halide (the definition of alkyl halides includes simple CrC8 alkyl halides such as methyl iodide and ethyl iodide, substituted alkyl halides such as chloromethyl alkyl ethers, Cl- CH2-Xf-Rh, wherein Xf is oxygen, and chloromethyl alkyl sulfides Cl- CH2-Xf-Rh, wherein Xf is sulfur), a CrC8alkyl sulfonate, or a di(CrC8alkyl) sulfate, or with a C3-C8alkenyl halide, or with a Cβ-Csalkynyl halide, or with an acylating agent such as a carboxylic acid, HO- C(Xa)Ra, wherein Xa is oxygen, an acid chloride, CI-C(Xa)Ra, wherein Xa is oxygen, or acid anhydride, [RaC(Xa)]2θ, wherein Xa is oxygen, or an isocyanate, RCN=C=O, or a carbamoyl chloride, CI-C(Xd)-N(Rc)-Rd (wherein Xd is oxygen and with the proviso that neither Rc or Rd is hydrogen), or a thiocarbamoyl chloride CI-(Xd)-N(Rc)-Rd (wherein Xd is sulfur and with the proviso that neither Rc or Rd is hydrogen) or a chloroformate, CI-C(Xb)-Xc-Rb, (wherein Xb and Xc are oxygen), or a chlorothioformate CI-C(Xb)-Xc-Rb (wherein Xb is oxygen and Xc is sulfur), or a chlorodithioformate CI-C(Xb)-Xc-Rb, (wherein Xb and Xc are sulfur), or an isothiocyanate, RCN=C=S, or by sequential treatment with carbon disulfide and an alkylating agent, or with a phosphorylating agent such as a phosphoryl chloride, CI-P(Xe)(Rf)-R9 or with a sulfonylating agent such as a sulfonyl chloride CI-SO2 — Re, preferably in the presence of at least one equivalent of base.
Where substituents R4 and R5 are not equal to substituents R6 and R7, these reactions may produce, in addition to a compound of formula I, a second compound of formula U.
Figure imgf000015_0001
Formula I Formula (A) Formula IA
This invention covers both a compound of formula I and a compound of formula U, together with mixtures of these compounds in any ratio.
The O-alkylation of cyclic 1 ,3-diones is known; suitable methods are described, for example, by T. Wheeler, US4436666. Alternative procedures have been reported by M. Pizzomo and S. Albonico, Chem. Ind. (London), (1972), 425-426; H. Born et al., J. Chem. Soα, (1953), 1779- 1782; M. G. Constantino et al., Synth. Commun., (1992), 22 (19), 2859-2864; Y. Tian et al., Synth. Commun., (1997), 27 (9), 1577-1582; S. Chandra Roy et al., Chem. Letters, (2006), 35 (1 ), 16-17; P. K. Zubaidha et al., Tetrahedron Lett., (2004), 45, 7187-7188.
The O-acylation of cyclic 1 ,3-diones may be effected by procedures similar to those described, for example, by R. Haines, US4175135, and by T. Wheeler, US4422870, US4659372 and US4436666. Typically diones of formula (A) may be treated with an acylating agent preferably in the presence of at least one equivalent of a suitable base, and optionally in the presence of a suitable solvent. The base may be inorganic, such as an alkali metal carbonate or hydroxide, or a metal hydride, or an organic base such as a tertiary amine or metal alkoxide. Examples of suitable inorganic bases include sodium carbonate, sodium or potassium hydroxide, sodium hydride, and suitable organic bases include trialkylamines, such as trimethylamine and triethylamine, pyridines or other amine bases such as 1 ,4-diazobicyclo[2.2.2]-octane and 1 ,8- diazabicyclo[5.4.0]undec-7-ene. Preferred bases include triethylamine and pyridine. Suitable solvents for this reaction are selected to be compatible with the reagents and include ethers such as tetrahydrofuran and 1 ,2-dimethoxyethane and halogenated solvents such as dichloromethane and chloroform. Certain bases, such as pyridine and triethylamine, may be employed successfully as both base and solvent. For cases where the acylating agent is a carboxylic acid, acylation is preferably effected in the presence of a known coupling agent such as 2-chloro-1- methylpyridinium iodide, Λ/,Λ/-dicyclohexylcarbodiimide, 1-(3-dimethylaminopropyl)-3- ethylcarbodiimide and Λ/,Λ/-carbodiimidazole, and optionally in the presence of a base such as triethylamine or pyridine in a suitable solvent such as tetrahydrofuran, dichloromethane or acetonitrile. Suitable procedures are described, for example, by W. Zhang and G. Pugh, Tetrahedron Lett., (1999), 40 (43), 7595-7598; T. lsobe and T. Ishikawa, J. Org. Chem., (1999), 64 (19), 6984-6988 and K. Nicolaou, T. Montagnon, G. Vassilikogiannakis, C. Mathison, J. Am. Chem. Soc, (2005), 127(24), 8872-8888.
Phosphorylation of cyclic 1 ,3-diones may be effected using a phosphoryl halide or thiophosphoryl halide and a base by procedures analogous to those described by L. Hodakowski, US4409153.
Sulfonylation of a compound of formula (A), may be achieved using an alkyl or aryl sulfonyl halide, preferably in the presence of at least one equivalent of base, for example by the procedure of C. Kowalski and K. Fields, J. Org. Chem., (1981 ), 46, 197-201.
Compounds of formula (A), wherein Y is S(O)n and n is 1 or 2 may be prepared from compounds of formula (A) wherein Y is S by oxidation, according to a procedure analogous to that of E. Fehnel and A. Paul, J. Am. Chem. Soc, (1955), 77, 4241-4244.
A compound of formula (A), wherein Y is O, S, C=O or CR12R13 may be prepared via the cyclisation of a compound of formula (B), preferably in the presence of an acid or base, and optionally in the presence of a suitable solvent, by analogous methods to those described by T. Wheeler, US4209532. The compounds of the formula (B) have been particularly designed as intermediates in the synthesis of the compounds of the formula I. Compounds of formula (B) wherein R is hydrogen or Ci-C4alkyl, (especially methyl, ethyl and fert-butyl) may be cyclised under acidic conditions, preferably in the presence of a strong acid such as sulfuric acid, polyphosphoric acid or Eaton's reagent, optionally in the presence of a suitable solvent such as acetic acid, toluene or dichloromethane.
Figure imgf000017_0001
formula (B) formula (A)
A compound of formula (B) wherein R is alkyl (preferably methyl or ethyl) may be cyclised under acidic or basic conditions, preferably under basic conditions in the presence of at least one equivalent of a strong base such as potassium fert-butoxide, lithium diisopropylamide, sodium bis(trimethylsilyl)amide or sodium hydride and in a solvent such as tetrahydrofuran, toluene, dimethylsulfoxide or Λ/,Λ/-dimethylformamide.
A compound of formula (B), wherein R is H may be esterified to a compound of formula (B), wherein R is alkyl, under known conditions (for example by treatment with an alcohol, R-OH, in the presence of an acid catalyst).
A compound of formula (B), wherein R is H may be prepared by hydrolysis of a compound of formula (C) wherein R is H or alkyl and R' is alkyl (preferably methyl or ethyl), followed by acidification of the reaction mixture to effect decarboxylation, by similar processes to those described by, for example, T. Wheeler, US4209532. Alternatively, a compound of formula (B), wherein R is alkyl (preferably methyl) may be prepared from a compound of formula (C), wherein R is alkyl (preferably methyl), through a Krapcho decarboxylation procedure under known conditions using known reagents (see for example G. Quallich, P. Morrissey, Synthesis, (1993), (1 ), 51-53).
Figure imgf000017_0002
n
Figure imgf000017_0003
formula (B)
A compound of formula (C) wherein R is alkyl may be prepared by treating a compound of formula (D) with a suitable carboxylic acid chloride of formula (E) wherein R is alkyl under basic conditions. Suitable bases include potassium ferf-butoxide, sodium bis(trimethylsilyl)amide and lithium diisopropylamide and the reaction is preferably conducted in a suitable solvent (such as tetrahydrofuran or toluene) at a temperature of between -80 0C and 30 0C:
Figure imgf000018_0001
formula (C)
Figure imgf000018_0002
formula (E)
Alternatively, a compound of formula (C), wherein R is H, may be prepared by treating a compound of formula (D) with a suitable base (such as potassium fert-butoxide, sodium bis(trimethylsilyl)amide and lithium diisopropylamide) in a suitable solvent (such as tetrahydrofuran or toluene) at a suitable temperature (between -80 0C and 30 0C) and reacting the resulting anion with a suitable anhydride of formula (F):
Figure imgf000018_0003
formula (F)
Compounds of formula (E) and formula (F) are known, or may be made by similar methods from commercially available starting materials (see, for example C. Rouvier, Tetrahedron Lett., (1984), 25 (39), 4371-4374; D. Walba and M. Wand, Tetrahedron Lett., (1982), 23 (48), 4995-4998; T. Terasawa and T. Okada, J. Org. Chem., (1977), 42 (7), 1163-1169 and G. Bennett, W. Houlihan, R. Mason, and R. Engstrom, J. Med. Chem., (1976), 19 (5), 709-714; J. Cason, Org. Synth. Coll. Vol. IV, (1963), 630-633).
Compounds of formula (D) are known (see, for example, H. lshibashi et ai, Chem. Pharm. Bull., (1991 ), 39 (11 ), 2878-2882; R. Kirsten et ai, EP338306 A2; W. Marshall, US3649679) or may be made by similar methods from known compounds.
In a further approach, a compound of formula (A) may be prepared by reacting a compound of formula (G) with an aryllead tricarboxylate, in the presence of a suitable ligand and in a suitable solvent. Similar reactions are described in the literature (for example see, M. Muehlebach et al., WO08/071405; J. Pinhey, B. Rowe, Aust. J. Chem., (1979), 32, 1561-6; J. Morgan, J. Pinhey, J. Chem. Soc. Perkin Trans. 1 , (1990), 3, 715-20). Preferably the aryllead tricarboxylate is an aryllead triacetate of formula (H). Preferably the ligand is a nitrogen containing heterocycle such as Λ/,Λ/-dimethylaminopyridine, 1 ,10-phenanthroline pyridine, bipyridine, or imidazole, and one to ten equivalents of ligand with respect to a compound of formula (J) is preferably used. Most preferably the ligand is Λ/,Λ/-dimethylaminopyridine. The solvent is preferably chloroform, dichloromethane or toluene, most preferably chloroform, or a mixture of chloroform and toluene. Preferably the reaction is conducted at a temperature of -100C to 1000C, most preferably at 40- 90°C).
Figure imgf000019_0001
formula (G) formula (H) formula (A)
Compounds of formula (G), wherein Y is O, are known compounds or may be prepared by routes analogous to those described in the literature (see, for example, M. Muehlebach et al., WO08/071405; M. Morgan and E. Heyningen, J. Am. Chem Soc, (1957), 79, 422-424; I. Korobitsyna and K. Pivnitskii, Russian Journal of General Chemistry, (1960), 30, 4016-4023; T. Terasawa, and T. Okada, J. Org. Chem., (1977), 42 (7), 1163-1169; R. Anderson et al. US5089046; R. Altenbach, K. Agrios, I. Drizin and W. Carroll, Synth. Commun., (2004), 34 (4) 557-565; R. Beaudegnies et al., WO2005/123667; W. Li, G. Wayne, J. Lallaman, S. Chang, and S. Wittenberger, J. Org. Chem. (2006), 71 , 1725-1727; R. Altenbach, M. Brune, S. Buckner, M. Coghlan, A. Daza, A. Fabiyi, M. Gopalakrishnan, R. Henry, A. Khilevich, M. Kort, I. Milicic, V. Scott, J. Smith, K. Whiteaker, and W. Carroll, J. Med. Chem, (2006), 49(23), 6869-6887; Carroll et al., WO 2001/083484 A1 ; J. K. Crandall, W. W. Conover, J. Org. Chem. (1978), 43(18), 3533- 5; I. K. Korobitsyna, O. P. Studzinskii, Chemistry of Heterocyclic Compounds (1966), (6), 848- 854). Compounds of formula (G), wherein Y is S, are known compounds or may be prepared by routes analogous to those described in the literature (see, for example, E. Fehnel and A. Paul, J. Am. Chem Soc, (1955), 77, 4241-4244; E. Er and P. Margaretha, Helvetica Chimica Acta (1992), 75(7), 2265-69; H. Gayer et al., DE 3318648 A1 ). Compounds of formula (G), wherein Y is C=O, are known compounds or may be prepared by routes analogous to those described in the literature (see, for example, R. Gόtz and N. Gόtz, WO2001/060776 R. Gόtz et al. WO 2000/075095; M. Benbakkar et al., Synth. Commun. (1989) 19(18) 3241-3247; A. Jain and T. Seshadri, Proc. Indian Acad. Sci. Sect. A, (1955), 42, 279); N. Ahmad et al., J. Org. Chem., (2007), 72(13), 4803-4815); F. Effenberger et a/., Chem. Ber., (1986), 119, 3394-3404 and references therein). Compounds of formula (G), wherein Y is CR12R13 are known compounds of may be prepared by routes analogous to those described in the literature (see for example, M. Muehlebach et al., WO08/110307; M. Muehlebach et al., WO08/110308; S. Spessard and B. Stoltz, Organic Letters, (2002), Vol. 4, No. 11 , 1943-1946; F. Effenberger et ai, Chem. Ber., (1984), 117, 3280-3296; W. Childers et al., Tetrahedron Lett., (2006), 2217-2218; W. Childers et ai, US2006/0004108; H. Schneider and C. Luethy, EP1352890; D. Jackson, A. Edmunds, M. Bowden and B. Brockbank, WO2005/105745 and WO2005/105717; R. Beaudegnies, C. Luethy, A. Edmunds, J. Schaetzer and S. Wendebom, WO2005/123667; J-C. Beloeil, J-Y. Lallemand, T. Prange, Tetrahedron, (1986), Vol. 42. No. 13, 3491-3502; G. Stork and R. Danheiser, J. Org. Chem., (1973), 38 (9), 1775-1776; H. Favre et al., Can. J. Chem. (1956), 34 1329-39; R. Shriner and H. Todd, Org. Synth. Coll. Vol. II, (1943), 200-202).
A compound of formula (H) may be prepared from a compound of formula (I) by treatment with lead tetraacetate in a suitable solvent (for example chloroform) at 25°C to 1000C (preferably 25- 500C), and optionally in the presence of a catalyst such as mercury diacetate, according to procedures described in the literature (for example see, K. Shimi, G. Boyer, J-P. Finet and J-P. GaIy, Letters in Organic Chemistry, (2005), 2, 407-409; J. Morgan and J. Pinhey, J. Chem. Soc. Perkin Trans. 1 ; (1990), 3, 715-720).
Figure imgf000020_0001
formula (I) formula (H)
An aryl boronic acid of formula (I) may be prepared from an aryl halide of formula (J), wherein Hal is bromine or iodine by known methods (see, for example, W. Thompson and J. Gaudino, J. Org. Chem, (1984), 49, 5237-5243 and R. Hawkins et al., J. Am. Chem. Soc, (1960), 82, 3053-3059). Thus an aryl halide of formula (J) may be treated with an alkyl lithium or alkyl magnesium halide at low temperature, and the aryl magnesium or aryl lithium reagent obtained is allowed to react with a trialkyl borate, B(OR")3, preferably trimethylborate, to give an aryl dialkylboronate which may be hydrolysed to the desired boronic acid of formula (I) under acidic conditions. Alternatively the same overall transformation of compound (J) to compound (I) may be achieved through a palladium-catalysed borylation reaction under known conditions using known reagents (see for example T. Ishiyama, M. Murata, N. Miyaura, J. Org. Chem. (1995), 60, 7508-7501 ; and K. L. Billingsley, T. E. Barder, S. L. Buchwald, Angew. Chem. Int. Ed. (2007), 46, 5359-5363), followed by hydrolysis of the intermediate boronate ester.
Figure imgf000021_0001
Figure imgf000021_0002
formula (I)
Pd-catalysed borylation hydrolysis
Figure imgf000021_0003
Aryl halides of formula (J) are known compounds or may be made by known methods from known compounds (See, for example, R. Clark, J. Agric. Food Chem., (1996), 44 (11 ), 3643- 3652; T. Okamato and J. Bunnett, J. Am. Chem. Soα, (1956), 78, 5357-5362; H. Scarborough and J. Sweeten, J. Chem. Soα, (1934), 52-56).
In a further approach, a compound of formula (A) may be prepared by cross-coupling an aryl halide of formula (K), wherein Hal is bromine or iodine, with a phenol, A-OH, in the presence of a suitable catalyst, optionally a suitable ligand or additive, a suitable base and a suitable solvent, under conditions similar to those described, for example, by S. Hu et ai, J. Org. Chem., (2008), 73, 7814-7817; P. Chan et ai, Tetrahedron Lett., (2008), 49, 2018-2022); R. Hosseinzadeh et al., Synthetic Commun., (2008) 38, 3023-3031 ; S. Buchwald et ai, J. Am. Chem. Soα, (2006), 128, 10694-10695 ; H. Rao et al., Chem. Eur. J., (2006), 12, 3636-3646; M. Taillefer et ai, Adv. Synth. Catal. (2006), 348, 499-505; M. Beller et al., Tetrahedron Lett., (2005), 46 (18), 3237-3240; M. Taillefer et al., Org. Lett. (2004), 6 (6), 913; D. Ma and Q. Cai, Org. Lett. (2003), 5 (21 ), 3799- 3802; J. Song et al., Org. Lett. (2002), 4 (9), 1623-1626; R. Venkataraman et al., Org. Lett. (2001 ), 3 (26), 4315-4317; S. Buchwald et al., J. Am. Chem. Soc. (1999), 121 , 4369-4378; S. Buchwald et al., J. Am. Chem. Soc, (1997), 1 19, 10539-10540; G. Mann and J. Hartwig, Tetrahedron Lett., (1997), 38 (46), 8005-8008. A-OH, catalyst ligaπd, solvent
Figure imgf000022_0001
Figure imgf000022_0002
Suitable catalysts include palladium and copper catalysts such as palladium(ll) acetate, bis(dibenzylideneacetone)palladium(ll), copper powder, copper(ll) acetate, copper(l) chloride, copper(l) bromide, copper(ll) bromide, copper(l) iodide, copper(l) oxide, copper(ll) sulfate, copper(l) trifluoromethanesulfonate and copper(ll) trifluoromethanesulfonate. Optionally the catalysts are used in conjunction with appropriate ligands or additives, such as Λ/-methylglycine Λ/,Λ/-dimethylglycine, 1-butylimidazole, ethyl acetate, ethylene glycol diacetate, 8- hydroxyquinoline, L-proline, 1 -naphthoic acid, triphenylphosphine, 1 ,1 '- bis(diphenylphosphino)ferrocene, salicylaldoxime, 2-(Λ/,Λ/-dimethylamino)-2'-di-ferf- butylphosphinobiphenyl, neocuproine, pyrrolidine-2-phosphionic acid phenyl monoester, 2,2,6,6- tetramethylheptane-3,5-dione, tetrabutylammonium bromide, 2,2-bipyridine or 1 ,10- phenanthroline. Suitable bases are cesium carbonate, cesium fluoride, potassium fluoride, potassium phosphate and sodium hydroxide. Suitable solvents are acetonitrile, Λ/,Λ/,- dimethylformamide, 1 ,4-dioxane or toluene, or mixed solvent systems such as toluene / tetrahydrofuran and 1 ,4-dioxane / water.
The use of copper(l) iodide and copper(ll) trifluoromethanesulfonate catalysts is preferred.
A compound of formula (K) may be prepared according to procedures described by M. Muehlebach et al., WO08/071405. For example, a compound of formula (K) may be prepared from a compound of formula (G) by reaction with a compound of formula (L) under conditions similar to those used for the preparation of a compound of formula (A) from a compound of formula (G).
Figure imgf000022_0003
formula (G) formula (L) formula (K) In a further approach, a compound of formula (A) may be prepared by reacting a compound of formula (M) with an aryl halide of formula A-HaI, wherein Hal represents fluorine, chlorine, bromine or iodine. When A-HaI is an aryl bromide or aryl iodide, the reaction may be effected using suitable copper or palladium catalysts under conditions decribed previously for the preparation of a compound of formula (A) from a compound of formula (K).
A-HaI, catalyst ligaπd, solvent
Figure imgf000023_0001
Figure imgf000023_0002
formula (M) formula (A)
Alternatively, when A-HaI is a suitably electron-deficient aryl halide (for example an aryl fluroride or aryl chloride additionally bearing one or more electron-withdrawing substituents such as trifluoromethyl, nitro or cyano), or a suitable heteroaryl halide (for example a halopyridine, halopyrimidine, or other electron-deficient heteroaryl halide) the reaction may be effected in the presence of a suitable base such as potassium carbonate or cesium carbonate, without the need for a catalyst and a ligand.
A compound of formula (M) may be prepared from a compound of formula (K). In one approach, a compound of formula (K) is deprotonated with a base (such as a Grignard reagent or alkyllithium reagent), and then treated with an alkyllithium reagent to effect metal-halogen exchange. The resulting organometallic species may then be converted into a compound of formula (M) either by treatment with a trialkylborate such as trimethyl borate followed by oxidation (for example by hydrogen peroxide, Λ/-methyl morpholine Λ/-oxide or oxone) as described, for example by G. Prakash et al., J. Org. Chem., (2001 ), 66 (2), 633-634; J-P Gotteland and S Halazy, Synlett. (1995), 931-932; K. Webb and D. Levy, Tetrahedron Lett., (1995), 36 (29), 51 17- 51 18. In an alternative approach, a compound of formula (M) may be prepared from a compound of formula (K) by treatment with an aqueous solution of an alkali metal hydroxide in the presence of a suitable catalyst and a suitable ligand, according to known procedures. For example, a compound of formula (M) may be prepared by treating a compound of formula (K) with potassium hydroxide in the presence of a palladium catalyst (for example bis(dibenzylidene- acetone)palladium(ll), and in the presence of a suitable phosphine ligand such as 2-(di-fert- butylphosphino)-2',4',6'-triisopropylbiphenyl and 2-(di-ferf-butylphosphino)-3,4,5,6-tetramethyl- 2',4',6'-triisopropylbiphenyl, under conditions described, for example, by S. Buchwald et ai, J. Am. Chem. Soα, (2006), 128, 10694-10695. Alternatively, a compound of formula (M) may be prepared by treating a compound of formula (K) treatment with an aqueous solution of sodium hydroxide in the presence of a suitable copper catalyst (for example copper(l) iodide) and a suitable ligand (such as L-proline), under conditions described, for example, by C. Kormos and N. Leadbeater, Tetrahedron (2006), 62 (19), 4728-4732 .
1. Grignard / Alkyllithium
2. B(OMe)3
3. Oxidation
Figure imgf000024_0001
1. Benzyl alcohol, catalyst
2. Debenzylation
In a third approach to a compound of formula (M) a compound of formula (K) may be treated with a benzyl alcohol in the presence of a suitable copper catalyst, followed by debenzylation under known conditions (for example by catalytic hydrogenolysis).
The compounds of the formula (M) are novel and have been especially designed as intermediates for the synthesis of the compounds of formula I.
In an alternative approach, a compound of formula (A) may be prepared by the reaction of a compound of formula (N), wherein Ar is an aryl moiety (preferably phenyl) with an arylboronic acid of formula (I) in the presence of a suitable palladium catalyst, a suitable base, an optionally in the presence of a suitable ligand or additive, and in a suitable solvent.
Figure imgf000025_0001
formula (N) formula (I) formula (A)
Suitable palladium catalysts include, for example palladium(ll) dihalides, palladium(ll) acetate and palladium(ll) sulfate, and is preferably palladium(ll) acetate. Suitable ligands include triphenyl- phosphine, tricyclopentylphosphine, tricyclohexylphosphine, 2-dicyclo-hexylphosphino-2',6'- dimethoxybiphenyl, 2-dicyclohexylphosphino-2',4',6'-triisopropyl-biphenyl, 1 ,1'-bis(diphenyl- phosphino)ferrocene and 1 ,2-bis(diphenylphosphino)ethane. The reaction may also be carried out in the presence of other additives, such as tetralkylammonium salts, for example, tetrabutylammonium bromide. Suitable bases include alkali metal hydroxides, especially lithium hydroxide. A suitable solvent is aqueous 1 ,2-dimethoxyethane.
A compound of Formula (N), wherein Ar is phenyl, may be prepared from a compound of Formula (G) by treatment with a hypervalent iodine reagent such as a (diacetoxy)iodobenzene or iodosylbenzene and a base such as aqueous sodium carbonate, lithium hydroxide or sodium hydroxide in a solvent such as water or an aqueous alcohol such as aqueous ethanol according to the procedures of K. Schank and C. Lick, Synthesis (1983), 392; R. Moriarty et al, J. Am. Chem. Soc, (1985), 107, 1375, or of Z. Yang et al., Org. Lett., (2002), 4 (19), 3333:
Figure imgf000025_0002
formula (G) formula (N) wherein Ar is phenyl
In a further approach, a compound of formula I may be prepared by reacting a compound of formula (O) (wherein G is preferably C1-4 alkyl, and Hal is a halogen, preferably bromine or iodine), with an arylboronic acid of formula (I) in the presence of a suitable palladium catalyst (for example 0.001-50% palladium(ll) acetate with respect to compound (O)) and a base (for example 1 to 10 equivalents potassium phosphate with respect to compound (O)) and preferably in the presence of a suitable ligand (for example 0.001-50% (2-dicyclohexylphosphino)-2',6'- dimethoxybiphenyl with respect to compound (U)), and in a suitable solvent (for example toluene), preferably between 25°C and 2000C. Similar couplings are known in the literature (see for example, Y. Song, B. Kim and J.-N. Heo, Tetrahedron Letters (2005), 46 (36), 5987-5990).
catalyst, ligand base, solvent
Figure imgf000026_0002
Figure imgf000026_0001
formula (O) formula (I) formula I
A compound of formula (O) may be prepared by halogenating a compound of formula (G), followed by reaction of the resulting halide of formula (Q) with a Ci-C4 alkyl halide or tri-Ci.C4- alkylorthoformate under known conditions, for example by the procedures of R. Shepherd and A. White (J. Chem. Soc. Perkin Trans. 1 (1987), 2153-2155) and Y.-L. Lin et al. (Bioorg. Med. Chem. (2002), 10, 685-690). Alternatively, a compound of formula (O) may be prepared by reacting a compound of formula (G) with a Ci-C4 alkyl halide or a tri-Ci.C4-alkylorthoformate, and halogenating the resulting enone of formula (R) under known conditions (see for example Y. Song, B. Kim and J.-N. Heo, Tetrahedron Letters (2005), 46(36), 5987-5990).
halogenation alkylation
Figure imgf000026_0003
formula (Q)
Figure imgf000026_0005
Figure imgf000026_0004
formula (G) formula (O)
alkylation halogenation
Figure imgf000026_0006
formula (R) In a further approach, a compound of formula (A) may be prepared by reacting a compound of formula (G) with a compound of formula (J) in the presence of a suitable palladium catalyst (for example 0.001-50% palladium(ll) acetate with respect to compound (G)) and a base (for example 1 to 10 equivalents potassium phosphate with respect to compound (G)) and preferably in the presence of a suitable ligand (for example 0.001-50% (2-dicyclohexylphosphino)-2',4',6'- triisopropylbiphenyl with respect to compound (G)), and in a suitable solvent (for example dioxane), preferably between 25°C and 2000C and optionally under microwave heating.
catalyst, ligand base, solvent
Figure imgf000027_0001
Figure imgf000027_0002
formula (G) formula (J) formula (A)
Similar couplings are known in the literature (see for example, S. Buchwald et al., J. Am. Chem. Soc. (2000), 122, 1360-1370; B. Hong et al. WO 2005/000233). Alternatively, a compound of formula (A) may be prepared by reacting a compound of formula (J) with a compound of formula (M) in the presence of a suitable copper catalyst (for example 0.001-50% copper(l) iodide with respect to compound (J)) and a base (for example 1 to 10 equivalents cesium carbonate with respect to compound (J)) and preferably in the presence of a suitable ligand (for example 0.001- 50% L-proline with respect to compound (J)), and in a suitable solvent (for example dimethylsulfoxide), preferably between 25°C and 2000C. Similar couplings are known in the literature (see for example, Y. Jiang et al., Synlett, (2005), 18, 2731-2734, and X. Xie et al., Organic Letters (2005), 7(21 ), 4693-4695).
The compounds of formula I according to the invention can be used as crop protection agents in unmodified form, as obtained in the synthesis, but they are generally formulated into crop protection compositions in a variety of ways using formulation adjuvants, such as carriers, solvents and surface-active substances. The formulations can be in various physical forms, for example in the form of dusting powders, gels, wettable powders, coated or impregnated granules for manual or mechanical distribution on target sites, water-dispersible granules, water-soluble granules, emulsifiable granules, water-dispersible tablets, effervescent compressed tablets, water-soluble tapes, emulsifiable concentrates, microemulsifiable concentrates, oil-in-water (EW) or water-in-oil (WO) emulsions, other multiphase systems such as oil/water/oil and water/oil/water products, oil flowables, aqueous dispersions, oily dispersions, suspoemulsions, capsule suspensions, soluble liquids, water-soluble concentrates (with water or a water-miscible organic solvent as carrier), impregnated polymer films or in other forms known, for example, from the
Manual on Development and Use of FAO Specifications for Plant Protection Products, 5th
Edition, 1999. The active ingredient may be incorporated into microfibers or micro-rods formed of polymers or polymerizable monomers and having diameter of about 0.1 to about 50 microns and aspect ratio of between about 10 and about 1000.
Such formulations can either be used directly or are diluted prior to use. They can then be applied through suitable ground or aerial application spray equipment or other ground application equipment such as central pivot irrigation systems or drip/trickle irrigation means.
Diluted formulations can be prepared, for example, with water, liquid fertilisers, micronutrients, biological organisms, oil or solvents.
The formulations can be prepared, for example, by mixing the active ingredient with formulation adjuvants in order to obtain compositions in the form of finely divided solids, granules, solutions, dispersions or emulsions. The active ingredients can also be contained in fine microcapsules consisting of a core and a polymeric shell. Microcapsules usually have a diameter of from 0.1 to 500 microns. They contain active ingredients in an amount of about from 25 to 95 % by weight of the capsule weight. The active ingredients can be present in the form of liquid technical material, in the form of a suitable solution, in the form of fine particles in solid or liquid dispersion or as a monolithic solid. The encapsulating membranes comprise, for example, natural and synthetic gums, cellulose, styrene-butadiene copolymers or other similar suitable membrane forming material, polyacrylonitrile, polyacrylate, polyester, polyamides, polyureas, polyurethane, aminoplast resins or chemically modified starch or other polymers that are known to the person skilled in the art in this connection.
Alternatively it is possible for fine so called "microcapsules" to be formed wherein the active ingredient is present in the form of finely divided particles in a solid matrix of a base substance, but in that case the microcapsule is not encapsulated with a diffusion limiting membrane as outlined in the preceding paragraph.
The active ingredients may be adsorbed on a porous carrier. This may enable the active ingredients to be released into their surroundings in controlled amounts (e.g. slow release). Other forms of controlled release formulations are granules or powders in which the active ingredient is dispersed or dissolved in a solid matrix consisting of a polymer, a wax or a suitable solid substance of lower molecular weight. Suitable polymers are polyvinyl acetates, polystyrenes, polyolefins, polyvinyl alcohols, polyvinyl pyrrolidones, alkylated polyvinyl pyrrolidones, copolymers of polyvinyl pyrrolidones and maleic anhydride and esters and half- esters thereof, chemically modified cellulose esters like carboxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose, examples of suitable waxes are polyethylene wax, oxidized polyethylene wax, ester waxes like montan waxes, waxes of natural origin like camauba wax, candelilla wax, bees wax etc.
Other suitable matrix materials for slow release formulations are starch, stearin, lignin. The formulation adjuvants suitable for the preparation of the compositions according to the invention are known per se.
As liquid carriers there may be used: water, aromatic solvents such as toluene, m-xylene, o- xylene, p-xylene and mixtures thereof, cumene, aromatic hydrocarbon blends with boiling ranges between 140 and 320 0C known under various trademarks like Solvesso®, Shellsol A®, Caromax®, Hydrosol®, paraffinic and isoparaffinic carriers such as paraffin oils, mineral oils, de- aromatized hydrocarbon solvents with boiling ranges between 50 and 320 0C known for instance under the trademark Exxsol®, non-dearomatized hydrocarbon solvents with boiling ranges between 100 and 320 0C known under the tradename Varsol®, isoparaffinic solvents with boiling ranges between 100 and 320 0C known under tradenames like Isopar® or Shellsol T®, hydrocarbons such as cyclohexane, tetrahydronaphthalene (tetralin), decahydronaphthalene, alpha-pinene, d-limonene, hexadecane, isooctane, ester solvents such as ethyl acetate, n//-butyl acetate, amyl acetate, /-bornyl acetate, 2-ethylhexyl acetate, Ce - Ciβ alkyl esters of acetic acid known under the tradename Exxate®, lactic acid ethylester, lactic acid propylester, lactic acid butylester, benzyl benzoate, benzyl lactate, dipropyleneglycol dibenzoate, dialkyl esters of succinic, maleic and fumaric acid and polar solvents like Λ/-methyl pyrrolidone, Λ/-ethyl pyrrolidone, C3-Cis-alkyl pyrrolidones, gamma-butyrolactone, dimethylsulfoxide, Λ/,Λ/-dimethyl- formamide, Λ/,Λ/-dimethylacetamide, Λ/,Λ/-dimethyllactamide, C4-C18 fatty acid dimethylamides, benzoic acid dimethylamide, acetonitrile, acetone, methyl ethyl ketone, methyl-isobutyl ketone, isoamyl ketone, 2-heptanone, cyclohexanone, isophorone, methyl isobutenyl ketone (mesityl oxide), acetophenone, ethylene carbonate, propylene carbonate, butylene carbonate, alcoholic solvents and diluents such as methanol, ethanol, propanol, n/iso-butanol, n/iso- pentanol, 2-ethyl hexanol, n-octanol, tetrahydrofurfuryl alkohol, 2-methyl-2,4-pentanediol, 4- hydroxy-4-methyl-2-pentanon, cyclohexanol, benzyl alcohol, ethylene glycol, ethylene glycol butyl ether, ethylene glycol methyl ether, diethylene glycol, diethylene glycol butyl ether, diethylene glycol ethyl ether, diethylene glycol methyl ether, propylene glycol, dipropylene glycol, dipropylene glycol methyl ether and other similar glycol ether solvents based on ethylene glycol, propylene glycol and butylene glycol feedstocks, triethylene glycol, polyethylene glycol (PEG 400), polypropylenglycols with molecular masses of 400 - 4000, glycerol, glycerol acetate, glycerol diacetate, glycerol triacetate, 1 ,4-dioxane, diethylene glycol abietate, chlorobenzene, chlorotoluene, fatty acid esters such as methyl octanoate, isopropyl myristate, methyl laurate, methyl oleate, mixture of Cs-C-io fatty acid methyl esters, rape seed oil methyl and ethyl esters, soy bean oil methyl and ethyl esters, vegetable oils, fatty acids such as oleic acid, linoleic acid, linolenic acid, esters of phosphoric and phosphonic acid such as triethyl phosphate, C3-Cis-tris- alkyl phosphates, alkylaryl phosphates, bis-octyl-octyl phosphonates.
Water is generally the carrier of choice for the dilution of the concentrates.
Suitable solid carriers are, for example, talc, titanium dioxide, pyrophyllite clay, silica (fumed or precipated silica and optionally functionalised or treated, for instance silanised), attapulgite clay, kieselguhr, limestone, calcium carbonate, bentonite, calcium montomorillonite, cottonseed husks, wheatmeal, soybean flour, pumice, wood flour, ground walnut shells, lignin and similar materials, as described, for example, in the EPA CFR 180.1001. (c) & (d). Powdered or granulated fertilisers can also be used as solid carriers.
A large number of surface-active substances can advantageously be used both in solid and in liquid formulations, especially in those formulations which can be diluted with a carrier prior to use. Surface-active substances may be anionic, cationic, amphoteric, non-ionic or polymeric and they may be used as emulsifiying, wetting, dispersing or suspending agents or for other purposes. Typical surface-active substances include, for example, salts of alkyl sulfates, such as diethanolammonium lauryl sulfate; Sodium lauryl sulfate, salts of alkylarylsulfonates, such as calcium or sodium dodecylbenzenesulfonate; alkylphenol-alkylene oxide addition products, such as nonylphenol ethoxylates; alcohol-alkylene oxide addition products, such as tridecyl alcohol ethoxylate; soaps, such as sodium stearate; salts of alkylnaphthalenesulfonates, such as sodium dibutylnaphthalenesulfonate; dialkyl esters of sulfosuccinate salts, such as sodium di(2- ethylhexyl)sulfosuccinate; sorbitol esters, such as sorbitol oleate; quaternary amines, such as lauryl trimethylammonium chloride, polyethylene glycol esters of fatty acids, such as polyethylene glycol stearate; block copolymers of ethylene oxide and propylene oxide; and salts of mono- and di-alkyl phosphate esters; and also further substances described e.g. in "McCutcheon's Detergents and Emulsifiers Annual", MC Publishing Corp., Ridgewood, New Jersey, 1981.
Further adjuvants which can usually be used in pesticidal formulations include crystallisation inhibitors, viscosity-modifying substances, suspending agents, dyes, anti-oxidants, foaming agents, light absorbers, mixing aids, anti-foams, complexing agents, neutralising or pH-modifying substances and buffers, corrosion-inhibitors, fragrances, wetting agents, absorption improvers, micronutrients, plasticisers, glidants, lubricants, dispersants, thickeners, anti-freezes, microbiocides, compatibility agents and solubilisers and also liquid and solid fertilisers. The formulations may also comprise additional active substances, for example further herbicides, herbicide safeners, plant growth regulators, fungicides or insecticides.
The compositions according to the invention can additionally include an additive (commonly referred to as an adjuvant), comprising a mineral oil, an oil of vegetable or animal origin, alkyl esters of such oils or mixtures of such oils and oil derivatives. The amount of oil additive used in the composition according to the invention is generally from 0.01 to 10 %, based on the spray mixture. For example, the oil additive can be added to the spray tank in the desired concentration after the spray mixture has been prepared. Preferred oil additives comprise mineral oils or an oil of vegetable origin, for example rapeseed oil, olive oil or sunflower oil, emulsifiable vegetable oil, such as AMIGO® (Loveland Products Inc.), alkyl esters of oils of vegetable origin, for example the methyl derivatives, or an oil of animal origin, such as fish oil or beef tallow. A preferred additive contains, for example, as active components essentially 80 % by weight alkyl esters of fish oils and 15 % by weight methylated rapeseed oil, and also 5 % by weight of customary emulsifiers and pH modifiers. Especially preferred oil additives comprise alkyl esters of C8-C22 fatty acids, especially the methyl derivatives of C12-C18 fatty acids, for example the methyl esters of lauric acid, palmitic acid and oleic acid, being important. Those esters are known as methyl laurate (CAS-1 1 1-82-0), methyl palmitate (CAS- 1 12-39-0) and methyl oleate (CAS-1 12-62-9). A preferred fatty acid methyl ester derivative is AGNIQUE ME 18 RD-F® (Cognis). Those and other oil derivatives are also known from the Compendium of Herbicide Adjuvants, 5th Edition, Southern Illinois University, 2000.
The application and action of the oil additives can be further improved by combining them with surface-active substances, such as non-ionic, anionic, cationic or amphoteric surfactants. Examples of suitable anionic, non-ionic, cationic or amphoteric surfactants are listed on pages 7 and 8 of WO97/34485. Preferred surface-active substances are anionic surfactants of the dodecylbenzylsulfonate type, especially the calcium salts thereof, and also non-ionic surfactants of the fatty alcohol ethoxylate type. Special preference is given to ethoxylated C12-C22 fatty alcohols having a degree of ethoxylation of from 5 to 40. Examples of commercially available surfactants are the Genapol types (Clariant). Also preferred are silicone surfactants, especially polyalkyl-oxide-modified heptamethyltrisiloxanes, which are commercially available e.g. as SILWET L-77®, and also perfluorinated surfactants. The concentration of surface-active substances in relation to the total additive is generally from 1 to 50 % by weight. Examples of oil additives that consist of mixtures of oils or mineral oils or derivatives thereof with surfactants are TURBOCHARGE®, ADIGOR® (both (Syngenta Crop Protection AG), ACTIPRON® (BP Oil UK Limited), AGRI-DEX® (Helena Chemical Company).
The said surface-active substances may also be used in the formulations alone, that is to say without oil additives.
Furthermore, the addition of an organic solvent to the oil additive/surfactant mixture can contribute to a further enhancement of action. Suitable solvents are, for example, SOLVESSO® and AROMATIC® solvents (Exxon Corporation). The concentration of such solvents can be from 10 to 80 % by weight of the total weight. Such oil additives, which may be in admixture with solvents, are described, for example, in US 4 834 908. A commercially available oil additive disclosed therein is known by the name MERGE® (BASF). Further oil additives that are preferred according to the invention are SCORE® and ADIGOR® (both Syngenta Crop Protection AG).
In addition to the oil additives listed above, in order to enhance the activity of the compositions according to the invention it is also possible for formulations of alkylpyrrolidones, (e.g. AGRIMAX® from ISP) to be added to the spray mixture. Formulations of synthetic latices, such as, for example, polyacrylamide, polyvinyl compounds or poly-1-p-menthene (e.g. BOND®, COURIER® or EMERALD®) can also be used.
Such adjuvant oils as described in the preceding paragraphs may be employed as the carrier liquid in which an active compound is dissolved, emulsified or dispersed as appropriate to the physical form of the active compound.
The pesticidal formulations generally contain from 0.1 to 99 % by weight, especially from 0.1 to 95 % by weight, of a compound of formula I and from 1 to 99.9 % by weight of a formulation adjuvant, which preferably includes from 0 to 25 % by weight of a surface-active substance. Whereas commercial products will preferably be formulated as concentrates, the end user will normally employ dilute formulations.
The rate of application of the compounds of formula I may vary within wide limits and depends upon the nature of the soil, the method of application (pre- or post-emergence; seed dressing; application to the seed furrow; no tillage application etc.), the crop plant, the weed or grass to be controlled, the prevailing climatic conditions, and other factors governed by the method of application, the time of application and the target crop. The compounds of formula I according to the invention are generally applied at a rate of 1- 2000 g/ha, preferably 1- 1000 g / ha and most preferably at 1- 500 g / ha. Preferred formulations have especially the following representative compositions: (% = percent by weight):
Emulsifiable concentrates: active ingredient: 1 to 95 %, preferably 60 to 90 % surface-active agents: 1 to 30 %, preferably 5 to 20 % solvents as liquid carrier: 1 to 80 %, preferably 1 to 35 % Dusts: active ingredient: 0.1 to 10 %, preferably 0.1 to 5 % solid carriers: 99.9 to 90 %, preferably 99.9 to 99 % Suspension concentrates: active ingredient: 5 to 75 %, preferably 10 to 50 % water: 94 to 24 %, preferably 88 to 30 % surface-active agents: 1 to 40 %, preferably 2 to 30 % Wettable powders: active ingredient: 0.5 to 90 %, preferably 1 to 80 % surface-active agents: 0.5 to 20 %, preferably 1 to 15 % solid carriers: 5 to 95 %, preferably 15 to 90 % Granules: active ingredient: 0.1 to 30 %, preferably 0.1 to 15 % solid carriers: 99.5 to 70 %, preferably 97 to 85 % Waterdispersible granules: active ingredient: 1 to 90 %, preferably 10 to 80 % surface-active agents: 0.5 to 80 %, preferably 5 to 30 % solid carriers: 90 to 10 %, preferably 70 to 30 %
The following Examples further illustrate, but do not limit, the invention.
F1. Emulsifiable concentrates a) b) c) d) active ingredient 5% 10% 25% 50% calcium dodecylbenzene- sulfonate 6% 8% 6% 8% castor oil polyglycol ether 4% 4% 4%
(36 mol of ethylene oxide) octylphenol polyglycol ether 4 % 2 % (7-8 mol of ethylene oxide)
NMP - 10% 20% arom. hydrocarbon 85% 68% 65% 16% mixture C9-C12
Emulsions of any desired concentration can be prepared from such concentrates by dilution with water.
F2. Solutions a) b) c) d) active ingredient 5% 10 % 50% 90%
1 -methoxy-3-(3-methoxy- propoxy)-propane 40% 50 % _ polyethylene glycol MW 400 20% 10 %
NMP - 50% 10% arom. hydrocarbon 35 % 30 % mixture C9-C12
The solutions are suitable for application undiluted or after dilution with water.
F3. Wettable powders a) b) c) d) active ingredient 5% 25% 50% 80% sodium lignosulfonate 4 % - 3 % - sodium lauryl sulfate 2 % 3 % - 4 % sodium diisobutylnaphthalene- sulfonate _ 6 % 5% 6 % octylphenol polyglycol ether - 1 % 2 % -
(7-8 mol of ethylene oxide) highly disperse silicic acid 1 % 3 % 5% 10% kaolin 88% 62% 35%
The active ingredient is thoroughly mixed with the adjuvants and the mixture is thoroughly ground in a suitable mill, yielding wettable powders which can be diluted with water to give suspensions of any desired concentration.
F4. Coated qranules a) b) c) active ingredient 0.1 % 5% 15 % highly dispersed silica 0.9 % 2 % 2 % inorg. carrier 99. 0 % 93% 83 %
(diameter 0.1 - 1 mm) e.g. CaCO3 or SiO2
The active ingredient is dissolved in methylene chloride, the solution is sprayed onto the carrier and the solvent is subsequently evaporated off in vacuo.
F5. Coated granules a) b) c) active ingredient 0.1 % 5% 15 % polyethylene glycol MW 200 1.0 % 2% 3 % highly dispersed silica 0.9 % 1 % 2 % inorg. carrier 98. 0% 92% 80 %
(diameter 0.1 - 1 mm) e.g. CaCO3 or SiO2
The finely ground active ingredient is applied uniformly, in a mixer, to the carrier moistened with polyethylene glycol. Non-dusty coated granules are obtained in this manner.
F6. Extruded granules a) b) c) d) active ingredient 0.1 % 3 % 5% 15% sodium lignosulfonate 1.5 % 2 % 3 % 4 % carboxymethylcellulose 1.4 % 2 % 2 % 2 % kaolin 97.0 % 93% 90% 79%
The active ingredient is mixed and ground with the adjuvants and the mixture is moistened with water. The resulting mixture is extruded and then dried in a stream of air.
F7. Water-dispersible qranules a) b) c) d) active ingredient 5% 10% 40% 90% sodium lignosulfonate 20% 20% 15% 7 % dibutyl naphthalene sulfonate 5% 5% 4 % 2 %
Gum arabic 2 % 1 % 1 % 1 %
Diatomaceous earth 20% 30% 5%
Sodium sulfate 4 % 5% kaolin 48% 30% 30%
The active ingredient is mixed and ground with the adjuvants and the mixture is moistened with water. The resulting mixture is extruded and then dried in a stream of air.
F7. Dusts a) b) c) active ingredient 0.1 % 1 % 5% talcum 39.9% 49% 35% kaolin 60.0 % 50 % 60 %
Ready-to-use dusts are obtained by mixing the active ingredient with the carriers and grinding the mixture in a suitable mill.
F8. Suspension concentrates a) b) c) d) active ingredient 3 % 10 % 25 % 50 % propylene glycol 5 % 5 % 5 % 5 % nonylphenol polyglycol ether - 1 % 2 % -
(15 mol of ethylene oxide) sodium lignosulfonate 3 % 3 % 7 % 6 % heteropolysacharide (Xanthan) 0.2 % 0.2 % 0.2 % 0.2 %
1 ,2-Benzisothiazolin-3-on 0.1 % 0.1 % 0.1 % 0.1 % silicone oil emulsion 0.7 % 0.7 % 0.7 % 0.7 % water 87 % 79 % 62 % 38 %
The finely ground active ingredient is intimately mixed with the adjuvants, yielding a suspension concentrate from which suspensions of any desired concentration can be prepared by dilution with water.
Crops of useful plants in which the compositions according to the invention can be used include especially cereals, in particular wheat and barley, rice, corn, rape, sugarbeet, sugarcane, soybean, cotton, sunflower, peanut and plantation crops.
The term "crops" is to be understood as also including crops that have been rendered tolerant to herbicides or classes of herbicides (for example ALS, GS, EPSPS, PPO and HPPD inhibitors) as a result of conventional methods of breeding or genetic engineering. An example of a crop that has been rendered tolerant e.g. to imidazolinones, such as imazamox, by conventional methods of breeding is Clearfield® summer rape (Canola). Examples of crops that have been rendered tolerant to herbicides by genetic engineering methods include e.g. glyphosate- and glufosinate- resistant maize varieties commercially available under the trade names RoundupReady® and LibertyLink®. The weeds to be controlled may be both monocotyledonous and dicotyledonous weeds, such as, for example, Stellaria, Nasturtium, Agrostis, Digitaria, Avena, Setaria, Sinapis, Lolium, Solanum, Echinochloa, Scirpus, Monochoria, Sagittaria, Bromus, Alopecurus, Sorghum, Rottboellia, Cyperus, Abutilon, Sida, Xanthium, Amaranthus, Chenopodium, Ipomoea, Chrysanthemum, Galium, Viola and Veronica. Control of monocotyledonous weeds, in particular Agrostis, Avena, Setaria, Lolium, Echinochloa, Bromus, Alopecurus and Sorghum is very extensive. Crops are also to be understood as being those which have been rendered resistant to harmful insects by genetic engineering methods, for example Bt maize (resistant to European corn borer), Bt cotton (resistant to cotton boll weevil) and also Bt potatoes (resistant to Colorado beetle). Examples of Bt maize are the Bt-176 maize hybrids of NK® (Syngenta Seeds). The Bt toxin is a protein that is formed naturally by Bacillus thuringiensis soil bacteria. Examples of toxins and transgenic plants able to synthesise such toxins are described in EP-A-451 878, EP-A-374 753, WO 93/07278, WO 95/34656, WO 03/052073 and EP-A-427 529. Examples of transgenic plants that contain one or more genes which code for an insecticidal resistance and express one or more toxins are KnockOut® (maize), Yield Gard® (maize), NuCOTIN33B® (cotton), Bollgard® (cotton), NewLeaf® (potatoes), NatureGard® and Protexcta®. Plant crops and their seed material can be resistant to herbicides and at the same time also to insect feeding ("stacked" transgenic events). Seed can, for example, have the ability to express an insecticidally active Cry3 protein and at the same time be glyphosate-tolerant. The term "crops" is to be understood as also including crops obtained as a result of conventional methods of breeding or genetic engineering which contain so-called output traits (e.g. improved flavour, storage stability, nutritional content).
Areas under cultivation are to be understood as including land where the crop plants are already growing as well as land intended for the cultivation of those crop plants.
The compounds of formula I according to the invention can also be used in combination with further herbicides. Preferably, in these mixtures, the compound of the formula I is one of those compounds listed in Tables 1 to 57 below. The following mixtures of the compound of formula I are especially important: compound of formula I + acetochlor, compound of formula I + acifluorfen, compound of formula I + acifluorfen-sodium, compound of formula I + aclonifen, compound of formula I + acrolein, compound of formula I + alachlor, compound of formula I + alloxydim, compound of formula I + allyl alcohol, compound of formula I + ametryn, compound of formula I + amicarbazone, compound of formula I + amidosulfuron, compound of formula I + aminopyralid, compound of formula I + amitrole, compound of formula I + ammonium sulfamate, compound of formula I + anilofos, compound of formula I + asulam, compound of formula I + atraton, compound of formula I + atrazine, compound of formula I + azimsulfuron, compound of formula I + BCPC, compound of formula I + beflubutamid, compound of formula I + benazolin, compound of formula I + benfluralin, compound of formula I + benfuresate, compound of formula I + bensulfuron, compound of formula I + bensulfuron-methyl, compound of formula I + bensulide, compound of formula I + bentazone, compound of formula I + benzfendizone, compound of formula I + benzobicyclon, compound of formula I + benzofenap, compound of formula I + bifenox, compound of formula I + bilanafos, compound of formula I + bispyribac, compound of formula I + bispyribac-sodium, compound of formula I + borax, compound of formula I + bromacil, compound of formula I + bromobutide, compound of formula I + bromoxynil, compound of formula I + butachlor, compound of formula I + butafenacil, compound of formula I + butamifos, compound of formula I + butralin, compound of formula I + butroxydim, compound of formula I + butylate, compound of formula I + cacodylic acid, compound of formula I + calcium chlorate, compound of formula I + cafenstrole, compound of formula I + carbetamide, compound of formula I + carfentrazone, compound of formula I + carfentrazone-ethyl, compound of formula I + CDEA, compound of formula I + CEPC, compound of formula I + chlorflurenol, compound of formula I + chlorflurenol-methyl, compound of formula I + chloridazon, compound of formula I + chlorimuron, compound of formula I + chlorimuron-ethyl, compound of formula I + chloroacetic acid, compound of formula I + chlorotoluron, compound of formula I + chlorpropham, compound of formula I + chlorsulfuron, compound of formula I + chlorthal, compound of formula I + chlorthal-dimethyl, compound of formula I + cinidon-ethyl, compound of formula I + cinmethylin, compound of formula I + cinosulfuron, compound of formula I + cisanilide, compound of formula I + clethodim, compound of formula I + clodinafop, compound of formula I + clodinafop-propargyl, compound of formula I + clomazone, compound of formula I + clomeprop, compound of formula I + clopyralid, compound of formula I + cloransulam, compound of formula I + cloransulam-methyl, compound of formula I + CMA, compound of formula I + 4-CPB, compound of formula I + CPMF, compound of formula I + 4-CPP, compound of formula I + CPPC, compound of formula I + cresol, compound of formula I + cumyluron, compound of formula I + cyanamide, compound of formula I + cyanazine, compound of formula I + cycloate, compound of formula I + cyclosulfamuron, compound of formula I + cycloxydim, compound of formula I + cyhalofop, compound of formula I + cyhalofop- butyl, compound of formula I + 2,4-D, compound of formula I + 3,4-DA, compound of formula I + daimuron, compound of formula I + dalapon, compound of formula I + dazomet, compound of formula I + 2,4-DB, compound of formula I + 3,4-DB, compound of formula I + 2,4-DEB, compound of formula I + desmedipham, compound of formula I + dicamba, compound of formula I + dichlobenil, compound of formula I + ortho-dichlorobenzene, compound of formula I + para- dichlorobenzene, compound of formula I + dichlorprop, compound of formula I + dichlorprop-P, compound of formula I + diclofop, compound of formula I + diclofop-methyl, compound of formula I + diclosulam, compound of formula I + difenzoquat, compound of formula I + difenzoquat metilsulfate, compound of formula I + diflufenican, compound of formula I + diflufenzopyr, compound of formula I + dimefuron, compound of formula I + dimepiperate, compound of formula I + dimethachlor, compound of formula I + dimethametryn, compound of formula I + dimethenamid, compound of formula I + dimethenamid-P, compound of formula I + dimethipin, compound of formula I + dimethylarsinic acid, compound of formula I + dinitramine, compound of formula I + dinoterb, compound of formula I + diphenamid, compound of formula I + diquat, compound of formula I + diquat dibromide, compound of formula I + dithiopyr, compound of formula I + diuron, compound of formula I + DNOC, compound of formula I + 3,4-DP, compound of formula I + DSMA, compound of formula I + EBEP, compound of formula I + endothal, compound of formula I + EPTC, compound of formula I + esprocarb, compound of formula I + ethalfluralin, compound of formula I + ethametsulfuron, compound of formula I + ethametsulfuron- methyl, compound of formula I + ethofumesate, compound of formula I + ethoxyfen, compound of formula I + ethoxysulfuron, compound of formula I + etobenzanid, compound of formula I + fenoxaprop-P, compound of formula I + fenoxaprop-P-ethyl, compound of formula I + fenoxasulfone (CAS RN 639826-16-7), compound of formula I + fentrazamide, compound of formula I + ferrous sulfate, compound of formula I + flamprop-M, compound of formula I + flazasulfuron, compound of formula I + florasulam, compound of formula I + fluazifop, compound of formula I + fluazifop-butyl, compound of formula I + fluazifop-P, compound of formula I + fluazifop-P-butyl, compound of formula I + flucarbazone, compound of formula I + flucarbazone- sodium, compound of formula I + flucetosulfuron, compound of formula I + fluchloralin, compound of formula I + flufenacet, compound of formula I + flufenpyr, compound of formula I + flufenpyr- ethyl, compound of formula I + flumetsulam, compound of formula I + flumiclorac, compound of formula I + flumiclorac-pentyl, compound of formula I + flumioxazin, compound of formula I + fluometuron, compound of formula I + fluoroglycofen, compound of formula I + f I uoroglycof en- ethyl, compound of formula I + flupropanate, compound of formula I + flupyrsulfuron, compound of formula I + flupyrsulfuron-methyl-sodium, compound of formula I + flurenol, compound of formula I + fluridone, compound of formula I + flurochloridone, compound of formula I + fluroxypyr, compound of formula I + flurtamone, compound of formula I + fluthiacet, compound of formula I + fluthiacet-methyl, compound of formula I + fomesafen, compound of formula I + foramsulfuron, compound of formula I + fosamine, compound of formula I + glufosinate, compound of formula I + glufosinate-ammonium, compound of formula I + glyphosate, compound of formula I + halosulfuron, compound of formula I + halosulfuron-methyl, compound of formula I + haloxyfop, compound of formula I + haloxyfop-P, compound of formula I + HC-252, compound of formula I + hexazinone, compound of formula I + imazamethabenz, compound of formula I + imazamethabenz-methyl, compound of formula I + imazamox, compound of formula I + imazapic, compound of formula I + imazapyr, compound of formula I + imazaquin, compound of formula I + imazethapyr, compound of formula I + imazosulfuron, compound of formula I + indanofan, compound of formula I + iodomethane, compound of formula I + iodosulfuron, compound of formula I + iodosulfuron-methyl-sodium, compound of formula I + ioxynil, compound of formula I + ipfencarbazone (CAS RN 212201-70-2), compound of formula I + isoproturon, compound of formula I + isouron, compound of formula I + isoxaben, compound of formula I + isoxachlortole, compound of formula I + isoxaflutole, compound of formula I + karbutilate, compound of formula I + lactofen, compound of formula I + lenacil, compound of formula I + linuron, compound of formula I + MAA, compound of formula I + MAMA, compound of formula I + MCPA, compound of formula I + MCPA-thioethyl, compound of formula I + MCPB, compound of formula I + mecoprop, compound of formula I + mecoprop-P, compound of formula I + mefenacet, compound of formula I + mefluidide, compound of formula I + mesosulfuron, compound of formula I + mesosulfuron- methyl, compound of formula I + mesotrione, compound of formula I + metam, compound of formula I + metamifop, compound of formula I + metamitron, compound of formula I + metazachlor, compound of formula I + metazosulfuron (NC-620, CAS RN 868680-84-6), compound of formula I + methabenzthiazuron, compound of formula I + methylarsonic acid, compound of formula I + methyldymron, compound of formula I + methyl isothiocyanate, compound of formula I + metobenzuron, compound of formula I + metolachlor, compound of formula I + S-metolachlor, compound of formula I + metosulam, compound of formula I + metoxuron, compound of formula I + metribuzin, compound of formula I + metsulfuron, compound of formula I + metsulfuron-methyl, compound of formula I + MK-616, compound of formula I + molinate, compound of formula I + monolinuron, compound of formula I + MSMA, compound of formula I + naproanilide, compound of formula I + napropamide, compound of formula I + naptalam, compound of formula I + neburon, compound of formula I + nicosulfuron, compound of formula I + nonanoic acid, compound of formula I + norflurazon, compound of formula I + oleic acid (fatty acids), compound of formula I + orbencarb, compound of formula I + orthosulfamuron, compound of formula I + oryzalin, compound of formula I + oxadiargyl, compound of formula I + oxadiazon, compound of formula I + oxasulfuron, compound of formula I + oxaziclomefone, compound of formula I + oxyfluorfen, compound of formula I + paraquat, compound of formula I + paraquat dichloride, compound of formula I + pebulate, compound of formula I + pendimethalin, compound of formula I + penoxsulam, compound of formula I + pentachlorophenol, compound of formula I + pentanochlor, compound of formula I + pentoxazone, compound of formula I + pethoxamid, compound of formula I + petrolium oils, compound of formula I + phenmedipham, compound of formula I + phenmedipham-ethyl, compound of formula I + picloram, compound of formula I + picolinafen, compound of formula I + pinoxaden, compound of formula I + piperophos, compound of formula I + potassium arsenite, compound of formula I + potassium azide, compound of formula I + pretilachlor, compound of formula I + primisulfuron, compound of formula I + primisulfuron-methyl, compound of formula I + prodiamine, compound of formula I + profluazol, compound of formula I + profoxydim, compound of formula I + prometon, compound of formula I + prometryn, compound of formula I + propachlor, compound of formula I + propanil, compound of formula I + propaquizafop, compound of formula I + propazine, compound of formula I + propham, compound of formula I + propisochlor, compound of formula I + propoxycarbazone, compound of formula I + propoxycarbazone-sodium, compound of formula I + propyrisulfuron (TH-547, CAS RN 570415-88-2), compound of formula I + propyzamide, compound of formula I + prosulfocarb, compound of formula I + prosulfuron, compound of formula I + pyraclonil, compound of formula I + pyraflufen, compound of formula I + py raf I uf en-ethyl, compound of formula I + pyrazolynate, compound of formula I + pyrazosulfuron, compound of formula I + pyrazosulfuron-ethyl, compound of formula I + pyrazoxyfen, compound of formula I + pyribenzoxim, compound of formula I + pyributicarb, compound of formula I + pyridafol, compound of formula I + pyridate, compound of formula I + pyriftalid, compound of formula I + pyriminobac, compound of formula I + pyriminobac-methyl, compound of formula I + pyrimisulfan, compound of formula I + pyrithiobac, compound of formula I + pyrithiobac-sodium, compound of formula I + quinclorac, compound of formula I + quinmerac, compound of formula I + quinoclamine, compound of formula I + quizalofop, compound of formula I + quizalofop-P, compound of formula I + rimsulfuron, compound of formula I + sethoxydim, compound of formula I + siduron, compound of formula I + simazine, compound of formula I + simetryn, compound of formula I + SMA, compound of formula I + sodium arsenite, compound of formula I + sodium azide, compound of formula I + sodium chlorate, compound of formula I + sulcotrione, compound of formula I + sulfentrazone, compound of formula I + sulfometuron, compound of formula I + sulfometuron-methyl, compound of formula I + sulfosate, compound of formula I + sulfosulfuron, compound of formula I + sulfuric acid, compound of formula I + tar oils, compound of formula I + 2,3,6-TBA, compound of formula I + TCA, compound of formula I + TCA-sodium, compound of formula I + tebuthiuron, compound of formula I + tepraloxydim, compound of formula I + terbacil, compound of formula I + terbumeton, compound of formula I + terbuthylazine, compound of formula I + terbutryn, compound of formula I + thenylchlor, compound of formula I + thiazopyr, compound of formula I + thifensulfuron, compound of formula I + thifensulfuron-methyl, compound of formula I + thiobencarb, compound of formula I + tiocarbazil, compound of formula I + topramezone, compound of formula I + tralkoxydim, compound of formula I + tri-allate, compound of formula I + triasulfuron, compound of formula I + triaziflam, compound of formula I + tribenuron, compound of formula I + tribenuron-methyl, compound of formula I + tricamba, compound of formula I + triclopyr, compound of formula I + trietazine, compound of formula I + trifloxysulfuron, compound of formula I + trifloxysulfuron-sodium, compound of formula I + trifluralin, compound of formula I + triflusulfuron, compound of formula I + triflusulfuron-methyl, compound of formula I + trihydroxytriazine, compound of formula I + tritosulfuron, compound of formula I + [3-[2-chloro-4-fluoro-5-(1-methyl-6-trifluoromethyl-2,4-dioxo-1 , 2,3,4- tetrahydropyrimidin-3-yl)phenoxy]-2-pyridyloxy]acetic acid ethyl ester (CAS RN 353292-31-6), compound of formula I + 4-[(4,5-dihydro-3-methoxy-4-methyl-5-oxo)-1 H-1 ,2,4-triazol-1- ylcarbonylsulfamoyl]-5-methylthiophene-3-carboxylic acid (BAY636), compound of formula I + BAY747 (CAS RN 335104-84-2), compound of formula I + topramezone (CAS RN 210631-68-8), compound of formula I + 4-hydroxy-3-[[2-[(2-methoxyethoxy)methyl]-6-(trifluoromethyl)-3- pyridinyl]carbonyl]-bicyclo[3.2.1]oct-3-en-2-one (CAS RN 352010-68-5), and compound of formula I + 4-hydroxy-3-[[2-(3-methoxypropyl)-6-(difluoromethyl)-3-pyridinyl]carbonyl]- bicyclo[3.2.1 ]oct-3-en-2-one.
The mixing partners for the compound of formula I may also be in the form of esters or salts, as mentioned e.g. in The Pesticide Manual, 12th Edition (BCPC) 2000.
For applications in cereals, the following mixtures are preferred: compound of formula I + aclonifen, compound of formula I + amidosulfuron, compound of formula I + aminopyralid, compound of formula I + beflubutamid, compound of formula I + benfluralin, compound of formula I + bifenox, compound of formula I + bromoxynil, compound of formula I + butafenacil, compound of formula I + carbetamide, compound of formula I + carfentrazone, compound of formula I + carfentrazone-ethyl, compound of formula I + chlorotoluron, compound of formula I + chlorpropham, compound of formula I + chlorsulfuron, compound of formula I + cinidon-ethyl, compound of formula I + clodinafop, compound of formula I + clodinafop-propargyl, compound of formula I + clopyralid, compound of formula I + 2,4-D, compound of formula I + dicamba, compound of formula I + dichlobenil, compound of formula I + dichlorprop, compound of formula I + diclofop, compound of formula I + diclofop-methyl, compound of formula I + difenzoquat, compound of formula I + difenzoquat metilsulfate, compound of formula I + diflufenican, compound of formula I + diquat, compound of formula I + diquat dibromide, compound of formula I + fenoxaprop-P, compound of formula I + fenoxaprop-P-ethyl, compound of formula I + flamprop-M, compound of formula I + florasulam, compound of formula I + fluazifop-P-butyl, compound of formula I + flucarbazone, compound of formula I + flucarbazone-sodium, compound of formula I + flufenacet, compound of formula I + flupyrsulfuron, compound of formula I + flupyrsulfuron-methyl-sodium, compound of formula I + flurochloridone, compound of formula I + fluroxypyr, compound of formula I + flurtamone, compound of formula I + imazamethabenz- methyl, compound of formula I + imazamox, compound of formula I + iodosulfuron, compound of formula I + iodosulfuron-methyl-sodium, compound of formula I + ioxynil, compound of formula I + isoproturon, compound of formula I + linuron, compound of formula I + MCPA, compound of formula I + mecoprop, compound of formula I + mecoprop-P, compound of formula I + mesosulfuron, compound of formula I + mesosulfuron-methyl, compound of formula I + mesotrione, compound of formula I + metribuzin, compound of formula I + metsulfuron, compound of formula I + metsulfuron-methyl, compound of formula I + pendimethalin, compound of formula I + picolinafen, compound of formula I + pinoxaden, compound of formula I + prodiamine, compound of formula I + propanil, compound of formula I + propoxycarbazone, compound of formula I + propoxycarbazone-sodium, compound of formula I + prosulfocarb, compound of formula I + pyrasulfotole, compound of formula I + pyridate, compound of formula I + pyroxasulfone (KIH-485), compound of formula I + pyroxsulam compound of formula I + sulfosulfuron, compound of formula 1 + tembotrione, compound of formula I + terbutryn, compound of formula I + thifensulfuron, compound of formula I + thiencarbazone, compound of formula I + thifensulfuron-methyl, compound of formula I + topramezone, compound of formula I + tralkoxydim, compound of formula I + tri-allate, compound of formula I + triasulfuron, compound of formula I + tribenuron, compound of formula I + tribenuron-methyl, compound of formula I + trifluralin, compound of formula I + trinexapac-ethyl and compound of formula I + tritosulfuron, where the mixtures comprising a compound of formula (I) + amidosulfuron, compound of formula (I) + aminopyralid, compound of formula (I) + beflubutamid, compound of formula (I) + bromoxynil, compound of formula (I) + carfentrazone, compound of formula (I) + carfentrazone- ethyl, compound of formula (I) + chlorotoluron, compound of formula (I) + chlorsulfuron, compound of formula (I) + clodinafop, compound of formula (I) + clodinafop-propargyl, compound of formula (I) + clopyralid, 2,4-D, compound of formula (I) + dicamba, compound of formula (I) + difenzoquat, compound of formula (I) + difenzoquat metilsulfate, compound of formula (I) + diflufenican, compound of formula (I) + fenoxaprop-P, compound of formula (I) + fenoxaprop-P- ethyl, compound of formula (I) + florasulam, compound of formula (I) + flucarbazone, compound of formula (I) + flucarbazone-sodium, compound of formula (I) + flufenacet, compound of formula (I) + flupyrsulfuron, compound of formula (I) + flupyrsulfuron-methyl-sodium, compound of formula (I) + fluroxypyr, compound of formula (I) + flurtamone, compound of formula (I) + iodosulfuron, compound of formula (I) + iodosulfuron-methyl-sodium, compound of formula (I) + MCPA, compound of formula (I) + mesosulfuron, compound of formula (I) + mesosulfuron-methyl, compound of formula (I) + metsulfuron, compound of formula (I) + metsulfuron-methyl, compound of formula (I) + pendimethalin, compound of formula (I) + picolinafen, compound of formula (I) + pinoxaden, compound of formula (I) + prosulfocarb, compound of formula (I) + pyrasulfotole, compound of formula (I) + pyroxasulfone (KIH-485), compound of formula (I) + pyroxsulam, compound of formula (I) + sulfosulfuron, compound of formula (I) + thifensulfuron, compound of formula (I) + thifensulfuron-methyl, compound of formula (I) + tralkoxydim, compound of formula (I) + triasulfuron, compound of formula (I) + tribenuron, compound of formula (I) + tribenuron- methyl, compound of formula (I) + trifluralin, compound of formula (I) + trinexapac-ethyl and compound of formula (I) + tritosulfuron are particularly preferred. For applications in rice, the following mixtures are preferred: compound of formula (I) + azimsulfuron, compound of formula (I) + bensulfuron, compound of formula (I) + bensulfuron- methyl, compound of formula (I) + benzobicyclon, compound of formula (I) + benzofenap, compound of formula (I) + bispyribac, compound of formula (I) + bispyribac-sodium, compound of formula (I) + butachlor, compound of formula (I) + cafenstrole, compound of formula (I) + cinosulfuron, compound of formula (I) + clomazone, compound of formula (I) + clomeprop, compound of formula (I) + cyclosulfamuron, compound of formula (I) + cyhalofop, compound of formula (I) + cyhalofop-butyl, compound of formula (I) + 2,4-D, compound of formula (I) + daimuron, compound of formula (I) + dicamba, compound of formula (I) + diquat, compound of formula (I) + diquat dibromide, compound of formula (I) + esprocarb, compound of formula (I) + ethoxysulfuron, compound of formula (I) + fenoxaprop-P, compound of formula (I) + fenoxaprop- P-ethyl, compound of formula I + fenoxasulfone (CAS RN 639826-16-7), compound of formula (I) + fentrazamide, compound of formula (I) + florasulam, compound of formula (I) + glufosinate- ammonium, compound of formula (I) + glyphosate, compound of formula (I) + halosulfuron, compound of formula (I) + halosulfuron-methyl, compound of formula (I) + imazosulfuron, compound of formula I + ipfencarbazone (CAS RN 212201-70-2), compound of formula (I) + MCPA, compound of formula (I) + mefenacet, compound of formula (I) + mesotrione, compound of formula (I) + metamifop, compound of formula I + metazosulfuron (NC-620, CAS RN 868680- 84-6), compound of formula (I) + metsulfuron, compound of formula (I) + metsulfuron-methyl, compound of formula (I) + n-methyl glyphosate, compound of formula (I) + orthosulfamuron, compound of formula (I) + oryzalin, compound of formula (I) + oxadiargyl, compound of formula (I) + oxadiazon, compound of formula (I) + paraquat dichloride, compound of formula (I) + pendimethalin, compound of formula (I) + penoxsulam, compound of formula (I) + pretilachlor, compound of formula (I) + profoxydim, compound of formula (I) + propanil, compound of formula I + propyrisulfuron (TH-547, CAS RN 570415-88-2), compound of formula (I) + pyrazolynate, compound of formula (I) + pyrazosulfuron, compound of formula (I) + pyrazosulfuron-ethyl, compound of formula (I) + pyrazoxyfen, compound of formula (I) + pyribenzoxim, compound of formula (I) + pyriftalid, compound of formula (I) + pyriminobac, compound of formula (I) + pyriminobac-methyl, compound of formula (I) + pyrimisulfan, compound of formula (I) + quinclorac, compound of formula (I) + tefuryltrione, compound of formula (I) + triasulfuron and compound of formula (I) + trinexapac-ethyl, where the mixtures comprising a compound of formula (I) + azimsulfuron, compound of formula (I) + bensulfuron, compound of formula (I) + bensulfuron-methyl, compound of formula (I) + benzobicyclon, compound of formula (I) + benzofenap, compound of formula (I) + bispyribac, compound of formula (I) + bispyribac-sodium, compound of formula (I) + clomazone, compound of formula (I) + clomeprop, compound of formula (I) + cyhalofop, compound of formula (I) + cyhalofop-butyl, compound of formula (I) + 2,4- D, compound of formula (I) + daimuron, compound of formula (I) + dicamba, compound of formula (I) + esprocarb, compound of formula (I) + ethoxysulfuron, compound of formula (I) + fenoxaprop-P, compound of formula (I) + fenoxaprop-P-ethyl, compound of formula I + fenoxasulfone (CAS RN 639826-16-7), compound of formula (I) + fentrazamide, compound of formula (I) + florasulam, compound of formula (I) + halosulfuron, compound of formula (I) + halosulfuron-methyl, compound of formula (I) + imazosulfuron, compound of formula I + ipfencarbazone (CAS RN 212201-70-2), compound of formula (I) + MCPA, compound of formula (I) + mefenacet, compound of formula (I) + mesotrione, compound of formula I + metazosulfuron (NC-620, CAS RN 868680-84-6), compound of formula (I) + metsulfuron, compound of formula (I) + metsulfuron-methyl, compound of formula (I) + orthosulfamuron, compound of formula (I) + oxadiargyl, compound of formula (I) + oxadiazon, compound of formula (I) + pendimethalin, compound of formula (I) + penoxsulam, compound of formula (I) + pretilachlor, compound of formula I + propyrisulfuron (TH-547, CAS RN 570415-88-2), compound of formula (I) + pyrazolynate, compound of formula (I) + pyrazosulfuron, compound of formula (I) + pyrazosulfuron-ethyl, compound of formula (I) + pyrazoxyfen, compound of formula (I) + pyribenzoxim, compound of formula (I) + pyriftalid, compound of formula (I) + pyriminobac, compound of formula (I) + pyriminobac-methyl, compound of formula (I) + pyrimisulfan, compound of formula (I) + quinclorac, compound of formula (I) + tefuryltrione, compound of formula (I) + triasulfuron and compound of formula (I) + trinexapac-ethyl are particularly preferred.
The compounds of formula I according to the invention can also be used in combination with safeners. Preferably, in these mixtures, the compound of the formula I is one of those compounds listed in Tables 1 to 57 below. The following mixtures with safeners, especially, come into consideration: compound of formula I + cloquintocet-mexyl, compound of formula I + cloquintocet acid and salts thereof, compound of formula I + fenchlorazole-ethyl, compound of formula I + fenchlorazole acid and salts thereof, compound of formula I + mefenpyr-diethyl, compound of formula I + mefenpyr diacid, compound of formula I + isoxad if en-ethyl, compound of formula I + isoxadifen acid, compound of formula I + furilazole, compound of formula I + furilazole R isomer, compound of formula (I) + N-(2-methoxybenzoyl)-4-[(methylaminocarbonyl)amino]benzenesulfonamide, compound of formula I + benoxacor, compound of formula I + dichlormid, compound of formula I + AD-67, compound of formula I + oxabetrinil, compound of formula I + cyometrinil, compound of formula I + cyometrinil Z-isomer, compound of formula I + fenclorim, compound of formula I + cyprosulfamide, compound of formula I + naphthalic anhydride, compound of formula I + flurazole, compound of formula I + CL 304,415, compound of formula I + dicyclonon, compound of formula I + fluxofenim, compound of formula I + DKA-24, compound of formula I + R-29148 and compound of formula I + PPG-1292. A safening effect can also be observed for the mixtures compound of the formula I + dymron, compound of the formula I + MCPA, compound of the formula I + mecoprop and compound of the formula I + mecoprop-P.
The above-mentioned safeners and herbicides are described, for example, in the Pesticide Manual, Twelfth Edition, British Crop Protection Council, 2000. R-29148 is described, for example by P. B. Goldsbrough et al., Plant Physiology, (2002), Vol. 130 pp. 1497-1505 and references therein, PPG-1292 is known from WO09211761 and N-(2-methoxybenzoyl)-4- [(methylaminocarbonyl)amino]benzenesulfonamide is known from EP365484. Benoxacor, cloquintocet-mexyl, cyprosulfamide, mefenpyr-diethyl and N-(2-methoxybenzoyl)-4- [(methylaminocarbonyl)amino]benzenesulfonamide are especially preferred, where cloquintocet- mexyl is particularly valuable.
The rate of application of safener relative to the herbicide is largely dependent upon the mode of application. In the case of field treatment, generally from 0.001 to 5.0 kg of safener/ha, preferably from 0.001 to 0.5 kg of safener/ha, and generally from 0.001 to 2 kg of herbicide/ha, but preferably from 0.005 to 1 kg/ha, are applied.
The herbicidal compositions according to the invention are suitable for all methods of application customary in agriculture, such as, for example, pre-emergence application, post-emergence application and seed dressing. Depending upon the intended use, the safeners can be used for pretreating the seed material of the crop plant (dressing the seed or seedlings) or introduced into the soil before or after sowing, followed by the application of the (unsafened) compound of the formula (I), optionally in combination with a co-herbicide. It can, however, also be applied alone or together with the herbicide before or after emergence of the plants. The treatment of the plants or the seed material with the safener can therefore take place in principle independently of the time of application of the herbicide. The treatment of the plant by simultaneous application of herbicide and safener (e.g. in the form of a tank mixture) is generally preferred. The rate of application of safener relative to herbicide is largely dependent upon the mode of application. In the case of field treatment, generally from 0.001 to 5.0 kg of safener/ha, preferably from 0.001 to 0.5 kg of safener/ha, are applied. In the case of seed dressing, generally from 0.001 to 10 g of safener/kg of seed, preferably from 0.05 to 2 g of safener/kg of seed, are applied. When the safener is applied in liquid form, with seed soaking, shortly before sowing, it is advantageous to use safener solutions which contain the active ingredient in a concentration of from 1 to 10 000 ppm, preferably from 100 to 1000 ppm. It is preferred to apply the other herbicide together with one of the safeners mentioned above. The following Examples illustrate the invention further but do not limit the invention.
Preparation Examples
Those skilled in the art will appreciate that certain compounds described below are β-ketoenols, and as such may exist as a single tautomer or as a mixture of keto-enol and diketone tautomers, as described, for example by J. March, Advanced Organic Chemistry, third edition, John Wiley and Sons. The compounds shown below, and in Table T1 are drawn as an arbitrary single enol tautomer, but it should be inferred that this description covers both the diketone form and any possible enols which could arise through tautomerism. Where more than one tautomer is observed in proton NMR, the data shown are for the mixture of tautomers. Furthermore, some of the compounds shown below are drawn as single enantiomers for the purposes of simplicity, but unless specified as single enantiomers, these structures should be construed as representing a mixture of enantiomers. Additionally, some of the compounds can exist as diastereoisomers, and it should be inferred that these can be present as a mixture of diastereoisomers or as any possible single diastereoisomer. Within the detailed experimental section the diketone tautomer is chosen for naming purposes, even if the predominant tautomer is the enol form.
Example 1
Preparation of 2-r5-(4-chloro-2-fluorophenoxy)-2-ethylphenyl1cvclohexane-1 ,3-dione
Figure imgf000047_0001
Step 1 : Preparation of 2-(5-bromo-2-ethylphenyl)cyclohexane-1 ,3-dione
Figure imgf000048_0001
To a solution of 5-bromo-2-ethylphenyllead triacetate (20.0Og, 35.2mmol) (described in WO08/071405) in chloroform (100ml) is added cyclohexane-1 ,3-dione (3.94g, 35.2mmol) and 4- dimethylaminopyridine (22.36g, 176mmol). After stirring the reaction at room temperature for 5 minutes toluene (50ml) is added and the solution is heated at 800C for 4 hours. After cooling to room temperature the mixture is allowed to stand overnight, followed by treatment with 2M aqueous hydrochloric acid. Following filtration of the precipitate the biphasic solution is separated, and the aqueous phase is extracted again with dichloromethane (x 2). Organic fractions are combined then evaporated under reduced pressure to yield a crude product which is purified by flash column chromatography (10% ethyl acetate/hexane to 70% ethyl acetate/hexane eluant) to afford 2-(5-bromo-2-ethylphenyl)cyclohexane-1 ,3-dione as a white solid.
Step 2 : Preparation of 2-(2-ethyl-5-iodophenyl)cyclohexane-1 ,3-dione
Figure imgf000048_0002
To a mixture of 2-(5-bromo-2-ethylphenyl)cyclohexane-1 ,3-dione (0.917g, 3.11 mmol), sodium iodide (0.934g, 6.23mmol) and hexamethyldisilazane (0.454g, 3.11 mmol) is added copper (I) iodide (0.03Og, 0.15mmol) and frans-Λ/,Λ/-dimethyl-1 ,2-cyclohexane diamine (0.044g, 0.31 mmol). Degassed dioxane (5ml) is added and the mixture is purged with nitrogen then heated at 1800C for 1 hour under microwave irradiation. After cooling to room temperature the reaction mixture is treated with 2M aqueous hydrochloric acid and extracted with dichloromethane. The phases are separated and the aqueous phase is further extracted with dichloromethane. Organic fractions are combined then evaporated under reduced pressure to yield a crude product which is purified by flash column chromatography (10% ethyl acetate/hexane to 70% ethyl acetate/ hexane eluant) to afford 2-(2-ethyl-5-iodophenyl)cyclohexane-1 ,3-dione as a white foam. Step 3 : Preparation of 2-[5-(4-chloro-2-fluorophenoxy)-2-ethylphenyl]cyclohexane-1 ,3-dione
Figure imgf000049_0001
To a mixture of 2-(2-ethyl-5-iodophenyl)cyclohexane-1 ,3-dione (0.25Og, 0.73mmol), 4-chloro-2- fluorophenol (0.535g, 3.65mmol) and cesium carbonate (0.477g, 1 .46mmol) is added powdered 3A molecular sieves (0.30Og) and copper (II) trifluoromathanesulfonate (0.012g, 0.037mmol). After degassing with nitrogen anhydrous toluene (4ml) is added, and the suspension is heated at 1600C for 1 hour under microwave irradiation. The reaction mixture is acidified with 2M aqueous hydrochloric acid and extracted with dichloromethane (x 2). The organic phase is separated then evaporated under reduced pressure to yield a crude product which is purified by preparative reverse-phase HPLC to afford 2-[5-(4-chloro-2-fluoro-phenoxy)-2-ethylphenyl]cyclohexane-1 ,3- dione.
Example 2
Preparation of 2-r5-(4-chloro-3-fluorophenoxy)-2-ethylphenyl1-5,5-dimethylcvclohexane-1 ,3-dione
Figure imgf000049_0002
To a mixture of 2-(5-bromo-2-ethylphenyl)-5,5-dimethylcyclohexane-1 ,3-dione (0.236g, 0.73mmol), cesium carbonate (0.477g, 1.46mmol), 4-chloro-3-fluorophenol (0.535g, 3.65mmol), copper (II) trifluoromethanesulfonate (0.012g, 0.04mmol) and powdered 3A molecular sieves (0.30Og) is added anhydrous toluene (4ml). After purging with nitrogen the reaction mixture is heated at 1700C for 1 hour under microwave irradiation, then allowed to cool to room temperature. After quenching with 2M aqueous hydrochloric acid the crude product is extracted into dichloromethane (x 2) and the phases are separated. Organic solvents are removed in vacuo and the crude product is purified by preparative reverse-phase HPLC to afford 2-[5-(4-chloro-3- fluorophenoxy)-2-ethylphenyl]-5,5-dimethylcyclohexane-1 ,3-dione as a white solid. Example 3
Preparation of meso-(1 R,5S)-3-r5-(4-chlorophenoxy)-2-ethylphenyl1bicvclor3.2.11octane-2,4-dione
Figure imgf000050_0001
Step 1 : Preparation of 3-(5-bromo-2-ethylphenyl)bicyclo[3.2.1]octane-2,4-dione
Figure imgf000050_0002
To a solution of 5-bromo-2-ethylphenyllead triacetate (16.34 g, 28.80 mmol) in chloroform (160 ml) is added bicyclo[3.2.1]octane-2,4-dione (3.61 g, 26.10 mmol) and 4-dimethylaminopyridine (16.63 g, 131 mmol), and the reaction mixture is stirred at room temperature for 5 minutes. Next toluene (40 ml) is added, and the mixture is stirred at 8O0C for 1 hour (pre-heated oil bath). The reaction mixture is allowed to cool to room temperature, quenched with 1 M hydrochloric acid, and the organic phase separated. The aqueous phase is further washed with dichloromethane (x 2), and again the phases are separated. All organics are combined then evaporated under reduced pressure to give a crude oil, which is purified by flash column chromatography on silica gel (30% to 50% ethyl acetate/iso-hexane eluant ratio, then 10% methanol/dichloromethane eluant ratio). The resulting gum is then recrystalised from dichloromethane/hexane to afford 3-(5-bromo-2- ethylphenyl)bicyclo[3.2.1]octane-2,4-dione as a cream coloured solid.
Step 2: Preparation of meso-(1 R,5S)-3-[5-(4-chlorophenoxy)-2-ethylphenyl]bicyclo[3.2.1]octane- 2,4-dione
Figure imgf000051_0001
To a mixture of 3-(5-bromo-2-ethylphenyl)bicyclo[3.2.1]octane-2,4-dione (0.20Og, 0.62mmol), caesium carbonate (0.406g, 1.25mmol) and 4-chlorophenol (0.400 g, 3.12mmol) is added copper (II) trifluoromethanesulfonate (0.01 1g, 0.03mmol) and powdered 3A molecular sieves (0.30Og). Degassed anhydrous toluene (2ml) is then added followed by purging with nitrogen then heating at 1700C for 1 hour under microwave irradiation. After cooling to room temperature the mixture is acidified with 2M aqueous hydrochloric acid and extracted with dichloromethane (x 2). The organic phase is separated then concentrated under vacuum. The crude product is then purified by preparative reverse phase HPLC and additionally flash column chromatography (10% ethyl acetate/hexane to 70% ethyl acetate/hexane eluant) to afford meso-(1 R,5S)-3-[5-(4- chlorophenoxy)-2-ethylphenyl]bicyclo[3.2.1]octane-2,4-dione as a white solid.
Example 4
Preparation of rac-(1 S,5R)-3-r5-(2,4-dichlorophenoxy)-2-ethylphenyl1-1 ,8,8- trimethylbicvclor3.2.11octane-2,4-dione
Figure imgf000051_0002
Step 1 : Preparation of rac-3-(5-bromo-2-ethylphenyl)-1 ,8,8-trimethylbicyclo[3.2.1]octane-2,4- dione
Figure imgf000051_0003
A solution of 1 ,8,8-trimethylbicyclo[3.2.1 ]octane-2,4-dione (0.22 g, 1.22 mmol) (preparation described by H. Favre et al., Can. J. Chem. (1956), 34 1329-39.) in dry chloroform (10 ml) is stirred at room temperature then thoroughly flushed with nitrogen. To this mixture is then added 4-dimethylaminopyridine (0.744 g, 6.15 mmol) and anhydrous toluene (3 ml), followed by heating to 8O0C. 5-Bromo-2-ethylphenyllead triacetate (0.673 g, 1 .18 mmol) is added portionwise over 10 minutes, and the mixture is further heated at this temperature for a further 4 hours then left to stand overnight. 2M hydrochloric acid (10 ml) is added, and the resulting biphasic mixture is filtered to remove any inorganic salts (washing with additional dichloromethane, 10 ml). The organic phase separated, and the aqueous phase is extracted again with dichloromethane (10 ml x2). All organic fractions are combined, dried over magnesium sulfate, filtered and the filtrate concentrated under reduced pressure to give an orange gum. This crude product is purified by flash column chromatography on silica gel (100% to 40% hexane/ethyl acetate eluant ratio) to afford /-ac-3-(5-bromo-2-ethylphenyl)-1 ,8,8-trimethylbicyclo[3.2.1]octane-2,4-dione as a colourless gum.
Step 2: Preparation of rac-(1 S,5R)-3-[5-(2,4-dichlorophenoxy)-2-ethylphenyl]-1 ,8,8- trimethylbicyclo[3.2.1 ]octane-2,4-dione
Figure imgf000052_0001
To a mixture of rac-3-(5-bromo-2-ethylphenyl)-1 ,8,8-trimethylbicyclo[3.2.1]octane-2,4-dione (0.175g, 0.48mmol), cesium carbonate (0.314g, 0.96mmol) and 2,4-dichlorophenol (0.393g, 2.41 mmol) is added copper (II) trifluoromethanesulfonate (0.009g, 0.024mmol) and powdered 3A molecular sieves (0.20Og). Degassed anhydrous toluene (2ml) is then added, followed by purging with nitrogen and heating at 1700C for 1 hour under microwave irradiation. After cooling to room temperature the reaction mixture is quenched with 2M aqueous hydrochloric acid and extracted with dichloromethane (x 2). The organic phase is separated and concentrated under reduced pressure. The crude product is then purified by preparative reverse phase HPLC to afford rac- (1 S,5R)-3-[5-(2,4-dichlorophenoxy)-2-ethylphenyl]-1 ,8,8-trimethylbicyclo[3.2.1]octane-2,4-dione. Example 5
Preparation of 4-r2-ethyl-5-(3-fluorophenoxy)phenyl1-2,2,6,6-tetramethylpyran-3,5-dione.
Figure imgf000053_0001
A mixture of 4-(5-bromo-2-ethylphenyl)-2,2,6,6-tetramethylpyran-3,5-dione (200 mg, 0.57 mmol), 3-fluorophenol (320 mg, 2.83 mmol), cesium carbonate (400 mg, 1.13 mmol), copper(ll) trifluoromethanesulfonate (10 mg, 0.03 mmol), and powdered 3A molecular sieves (400 mg) in toluene (3.5 ml) is heated to 160 0C under microwave irradiation for 60 minutes. The mixture is cooled to room temperature, poured into 2M aqueous hydrochloric acid, diluted with dichloromethane and filtered through a phase separation cartridge. The organic phase is collected. The solvent is evaporated under reduced pressure and the residue is purified by column chromatography on silica gel to give 4-[2-ethyl-5-(3-fluorophenoxy)phenyl]-2, 2,6,6- tetramethylpyran-3,5-dione.
Example 6
Preparation of 4-r5-(4-chlorophenoxy)-2-ethylphenyl1-2,2,6,6-tetramethylpyran-3,5-dione.
Figure imgf000053_0002
A mixture of 4-(5-bromo-2-ethylphenyl)-2,2,6,6-tetramethylpyran-3,5-dione (200 mg, 0.57 mmol), 4-chlorophenol (1 10 mg, 0.86 mmol), copper(l) iodide (109 mg, 0.57 mmol), 1 , 10-phenanthroline (103 mg, 0.57 mmol) and potassium phosphate (483 mg, 2.28 mmol), in dimethylsulfoxide (3.5 ml) is heated to 200 0C under microwave irradiation for 30 minutes. The mixture is cooled to room temperature, poured into 2M aqueous hydrochloric acid and extracted with dichloromethane. The organic extract is washed with water, dried over anhydrous magnesium sulfate, filtered and the filtrate is evaporated under reduced pressure. The solvent is evaporated under reduced pressure and the residue is purified by column chromatography on silica gel to give 4-[5-(4- chlorophenoxy)-2-ethylphenyl]-2,2,6,6-tetramethylpyran-3,5-dione. Example 7
Preparation of 4-r5-(3-chloro-4-nitrophenoxy)-2-ethylphenyl1-2,2,6,6-tetramethylpyran-3,5-dione.
Figure imgf000054_0001
Step 1 : Preparation of 4-(2-ethyl-5-hydroxyphenyl)-2,2,6,6-tetramethylpyran-3,5-dione.
Figure imgf000054_0002
A solution of isopropylmagnesium chloride in dry tetrahydrofuran (10.6 ml of a 2 M solution, 21.2 mmol) is added dropwise to a solution of 4-(5-bromo-2-ethylphenyl)-2,2,6,6-tetramethylpyran-3,5- dione (5.0 g, 14. 2 mmol) in tetrahydrofuran (60 ml) at O0C, and once the addition is complete the mixture is stirred for ten minutes, then allowed to warm and stirred for 70 minutes at room temperature. The mixture is then cooled to -780C and a solution of n-butyllithium in hexanes (53 ml of a 1.6 M solution, 85.0 mmol) is added dropwise over 20 minutes. The mixture is stirred at -780C for 10 minutes, and then the solution is allowed to warm and stirred for 1 hour and 50 minutes at room temperature.
The mixture obtained is added via cannular to a solution of trimethylborate (31.6 ml, 283 mmol) in dry tetrahydrofuran (30 ml) at -780C, and the mixture stirred for 20 minutes, then allowed to warm to room temperature. A further quantity of dry tetrahydrofuran (20 ml) is added to aid stirring, and the mixture is stirred at room temperature for a further 1 hour and 30 minutes. The mixture is cooled to O0C and a 30% hydrogen peroxide solution (16 ml, 142 mmol) is added cautiously. The mixture stirred for 10 minutes at O0C, then allowed to warm to room temperature and stirred at for 18 hours.
The mixture is partitioned between dichloromethane and dilute aqueous hydrochloric acid. The aqueous is extracted with dichloromethane and the organic extracts are combined, washed with brine, dried over anhydrous magnesium sulfate, filtered and the filtrate is concentrated under reduced pressure. The residue is purified by column chromatography on silica gel to give 4-(2- ethyl-5-hydroxyphenyl)-2,2,6,6-tetramethylpyran-3,5-dione.
Step 2: Preparation of 4-[5-(3-chloro-4-nitrophenoxy)-2-ethylphenyl]-2,2,6,6-tetramethylpyran-3,5- dione.
Figure imgf000055_0001
A mixture of 4-(2-ethyl-5-hydroxyphenyl)-2,2,6,6-tetramethylpyran-3,5-dione (100 mg, 0.34 mmol), 2-chloro-4-fluoro-1-nitrobenzene (72 mg, 0.41 mmol), and potassium carbonate (1 10 mg, 0.69 mmol) in Λ/,Λ/-dimethylformamide (2 ml) is heated to 140 0C under microwave irradiation for 40 minutes. The mixture is cooled to room temperature, poured into 2M aqueous hydrochloric acid and extracted with ethyl acetate. The organic extract is washed with brine, dried over anhydrous magnesium sulfate, filtered and the filtrate is evaporated under reduced pressure. The residue is purified by column chromatography on silica gel to give 4-[5-(3-chloro-4-nitro-phenoxy)- 2-ethylphenyl]-2,2,6,6-tetramethylpyran-3,5-dione.
Example 8
Preparation of 4-r2-ethyl-5-(6-trifluoromethylpyridin-2-yloxy)phenyl1-2,2,6,6-tetramethylpyran-3,5- dione.
Figure imgf000055_0002
Step 1 : Alternative preparation of 4-(2-ethyl-5-hydroxyphenyl)-2,2,6,6-tetramethylpyran-3,5-dione.
Figure imgf000056_0001
A mixture of 4-(5-bromo-2-ethylphenyl)-2,2,6,6-tetramethylpyran-3,5-dione (1 .0 g, 2.8 mmol), copper(l) iodide (108 mg, 0.57 mmol) and L-proline (33 mg, 0.28 mmol) in an aqueous solution of sodium hydroxide (8.8 ml of a 1 N solution) is heated at 2000C for 2 hours under microwave irradiation. The mixture is cooled to room temperature, poured into 2M aqueous hydrochloric acid and extracted with ethyl acetate. The organic extract is washed with brine, dried over anhydrous magnesium sulfate, filtered and the filtrate is evaporated under reduced pressure. The solvent is evaporated under reduced pressure and the residue is purified by column chromatography on silica gel to give 4-(2-ethyl-5-hydroxyphenyl)-2,2,6,6-tetramethylpyran-3,5-dione.
Step 2: Preparation of 4-[2-ethyl-5-(6-trifluoromethylpyridin-2-yloxy)phenyl]-2,2,6,6- tetramethylpyran-3,5-dione.
Figure imgf000056_0002
A mixture of 4-(2-ethyl-5-hydroxyphenyl)-2,2,6,6-tetramethylpyran-3,5-dione (100 mg, 0.34 mmol), 2-fluoro-6-trifluoromethylpyridine (68 mg, 0.41 mmol), and potassium carbonate (1 10 mg, 0.69 mmol) in Λ/,Λ/-dimethylformamide (3 ml) is heated to 140 0C under microwave irradiation for 40 minutes. The mixture is cooled to room temperature, poured into 2M aqueous hydrochloric acid, diluted with dichloromethane and filtered through a phase separation cartridge. The organic phase is collected. The solvent is evaporated under reduced pressure and the residue is purified by column chromatography on silica gel to give 4-[2-ethyl-5-(6-trifluoromethylpyridin-2- yloxy)phenyl]-2,2,6,6-tetramethylpyran-3,5-dione.
Example 9
Preparation of 4-[2-ethyl- 5-(2-fluoro-4-nitrophenoxy)phenyl1-2,2,6,6-tetramethylpyran-3,5-dione.
Figure imgf000057_0001
A mixture of 4-(2-ethyl-5-hydroxyphenyl)-2,2,6,6-tetramethylpyran-3,5-dione (135 mg, 0.47 mmol), 3, 4-difluoro-1 -nitrobenzene (90 mg, 0.56 mmol), and potassium carbonate (130 mg, 0.94 mmol) in Λ/,Λ/-dimethylformamide (3 ml) is heated to 80 0C for 3 hours. The mixture is cooled to room temperature, poured into 2M aqueous hydrochloric acid and extracted with ethyl acetate. The organic extract is dried over anhydrous magnesium sulfate, filtered and the filtrate is evaporated under reduced pressure. The residue is purified by column chromatography on silica gel to give 4-[2-ethyl- 5-(2-fluoro-4-nitrophenoxy)phenyl]-2,2,6,6-tetramethylpyran-3,5-dione.
Example 10
Preparation of 9-r5-(4-bromo-2-fluorophenoxy)-2-ethylphenyl1-3-oxaspiror5.51undecane-8, 10- dione.
Figure imgf000057_0002
Step 1 : Preparation of 9-(5-bromo-2-ethylphenyl)-3-oxaspiro[5.5]undecane-8, 10-dione.
Figure imgf000057_0003
3-oxaspiro[5.5]undecane-8,10-dione (50.0 g, 0.275 mol) is added to a solution of sodium carbonate (58.3 g, 0.55 mol) in a mixture of ethanol (175 ml) and water (700 ml), and the mixture is stirred at room temperature until dissolution is complete, and then the mixture is cooled to 50C. lodobenzene diacetate (88.45 g, 0.275 mol) is added portionwise over 15 minutes, and once the addition is complete the mixture is stirred for 15 minutes at 50C, then the cooling bath is removed and the mixture is stirred and allowed to warm to room temperature for 4 hours. The precipitated iodonium ylide is collected by filtration.
A portion of the iodonium ylide (2.0 g, 5.21 mmol) is added to a mixture of 2-ethyl-5- bromophenylboronic acid (1 .43 g, 6.25 mmol), palladium(ll) acetate (59 mg, 0.26 mmol) and lithium hydroxide monohydrate (0.656 g, 15.6 mmol) in 1 ,2-dimethoxyethane (40 ml) and water (10 ml), and the mixture is heated at 5O0C for 6 hours, and then allowed to stand at room temperature overnight. The mixture is filtered through diatomaceous earth, washing the filter cake with water (50 ml) and ethyl acetate (50 ml). The organic phase is discarded. The aqueous phase is acidified to pH2 by addition of concentrated hydrochloric acid, and then extracted with ethyl acetate. The organic extract is dried over anhydrous magnesium sulfate, filtered and the filtrate is evaporated under reduced pressure. The residue is purified by column chromatography on silica gel to give 9-(5-bromo-2-ethylphenyl)-3-oxaspiro[5.5]undecane-8, 10-dione.
Step 2: Preparation of 9-[5-(4-bromo-2-fluorophenoxy)-2-ethylphenyl]-3-oxaspiro[5.5]undecane- 8,10-dione.
Figure imgf000058_0001
A mixture of 9-(5-bromo-2-ethylphenyl)-3-oxaspiro[5.5]undecane-8,10-dione (360 mg, 0.99 mmol), 4-bromo-2-fluorophenol (227 mg, 1.19 mmol), cesium carbonate (645 mg, 1.98 mmol), copper(ll) trifluoromethanesulfonate (18 mg, 0.05 mmol) and ethyl acetate (50 μl) in toluene (10 ml) is heated under reflux for 19 hours. The mixture is cooled to room temperature, N, N- dimethylformamide (2 ml) and 2M aqueous hydrochloric acid (10 ml) are added, and the mixture is stirred vigorously for 45 minutes. The mixture is extracted with ethyl acetate, and the organic extract is dried over anhydrous magnesium sulfate, filtered and the filtrate is evaporated under reduced pressure. The residue is purified by preparative reverse phase HPLC to give 9-[5-(4- bromo-2-fluorophenoxy)-2-ethylphenyl]-3-oxaspiro[5.5]undecane-8,10-dione.
Example 1 1
Preparation of 4-r2-cvclopropyl-5-(2,4-dichlorophenoxy)-phenyl1-2,2,6,6-tetramethylpyran-3,5- dione
Figure imgf000059_0001
Step 1 : Preparation of 5-bromo-2-cyclopropylbenzaldehyde
Figure imgf000059_0002
To a mixed solution of toluene (2250 ml) and distilled water (250 ml) at O0C is added finely ground potassium phosphate tribasic (699.23 g, 3.29 mol) portionwise over 10 minutes. This mixture is then allowed to warm to room temperature, followed by the addition of 2,5-dibromobenzaldehyde (235.0 g, 890 mmol) and cyclopropylboronic acid (68.92 g, 801 mmol). After stirring at room temperature for 50 minutes under a blanket of nitrogen tetrakis(triphenylphosphine)palladium (102.89 g, 89 mmol) is added over 10 minutes, washing residual solid with toluene (50 ml). The reaction mixture is then stirred at 8O0C for 22 hours, followed by cooling to room temperature and addition of distilled water (500 ml). The mixture is filtered through a pad of silica (washing with additional ethyl acetate) and the aqueous phase is extracted with ethyl acetate (2 x 300 ml). The combined organic extracts are washed with brine (500 ml), dried with anhydrous magnesium sulfate and concentrated under reduced pressure. The residue is purified by chromatography on silica gel (iso-hexane/ethyl acetate as eluant) followed by distillation under reduced pressure to afford 5-bromo-2-cyclopropylbenzaldehyde as a yellow oil.
Step 2: Preparation of 4-[1-(5-bromo-2-cyclopropylphenyl)methylidene]-2, 2,5,5- tetramethyldihydrofuran-3-one
Figure imgf000059_0003
To an ice-cold suspension of sodium methoxide (40.1g, 740 mmol) in anhydrous 1 ,2- dimethoxyethane is added 2,2,5,5-tetramethyldihydrofuran-3-one (94.9g, 670 mmol), washing with additional dimethoxyethane (120 ml). The reaction mixture is stirred at 00C 30 minutes, followed by addition of 5-bromo-2-cyclopropylbenzaldehyde (137.2g, 610 mM) as a solution in dimethoxyethane (280 ml_). After stirring for an additional 3 hours at this temperature the reaction is quenched with water (800 ml) and allowed to warm to room temperature. Diethyl ether (800 ml) is added and the the two phases are separated. The aqueous phase is extracted again with diethyl ether (*2), and all organics are washed with brine (800 ml.) then dried over magnesium sulfate. After concentration in vacuo the residue is purified by flash chromatography on silica gel (iso-hexane/ethyl acetate as eluant) to afford 4-[1-(5-bromo-2- cyclopropylphenyl)methylidene]-2,2,5,5-tetramethyldihydrofuran-3-one.
Step 3: Preparation of 2-(5-bromo-2-cyclopropylphenyl)-4,4,6,6-tetramethyl-1 ,5- dioxaspiro[2.4]heptan-7-one
Figure imgf000060_0001
To a solution of 4-[1-(5-bromo-2-cyclopropylphenyl)methylidene]-2,2,5,5-tetramethyldihydrofuran- 3-one (189 g, 541 mmol) in methanol (2650 ml) at 530C is added and 2M aqueous lithium hydroxide (27.1 ml, 54.2 mmol) then 50% aqueous hydrogen peroxide (46.1 ml, 812 mmol). After stirring for 30 minutes at this temperature the solution is cooled to 450C and quenched with saturated aqueous sodium thiosulfate. Distilled water (1000 ml) is added and the organic solvents are removed in vacuo. The aqueous phase is then extracted into ethyl acetate (x 2) and the combined organic extracts are washed with saturated aqueous sodium hydrogen carbonate (x 2), brine (500 ml_), then dried over anhydrous magnesium sulfate. Volatile solvents are removed under vacuum to afford 2-(5-bromo-2-cyclopropylphenyl)-4,4,6,6-tetramethyl-1 ,5- dioxaspiro[2.4]heptan-7-one.
Step 4: Preparation of 4-(5-bromo-2-cyclopropylphenyl)-2,2,6,6-tetramethylpyran-3,5-dione
Figure imgf000061_0001
To a suspension of iron (III) chloride (53.0 g, 327 mmol) in anhydrous dichloromethane (1000 ml) at 50C is added a second solution of 2-(5-bromo-2-cyclopropylphenyl)-4,4,6,6-tetramethyl-1 ,5- dioxaspiro[2.4]heptan-7-one (119.1 g, 326 mmol) in anhydrous dichloromethane (400 ml), at such a rate as to maintain an internal temperature below 1O0C. After stirring for 15 minutes the reaction is quenched with distilled water (900 ml) and the mixture is allowed to warm to room temperature. The two phases are separated and the aqueous phase is extracted with dichloromethane (x 2). Organics are combined and the crude product is extracted into 1 M aqueous potassium carbonate, followed by acidification to pHO with concentrated hydrochloric acid and re-extraction with dichloromethane. All organics are combined then washed with brine and dried over anhydrous magnesium sulfate. Concentration in vacuo then affords 4-(5-bromo-2- cyclopropylphenyl)-2,2,6,6-tetramethylpyran-3,5-dione as a white solid.
Step 5: Preparation of 4-[2-cyclopropyl-5-(2,4-dichlorophenoxy)-phenyl]-2,2,6,6-tetramethyl- pyran-3,5-dione
Figure imgf000061_0002
To a mixture of 4-(5-bromo-2-cyclopropylphenyl)-2,2,6,6-tetramethylpyran-3,5-dione (0.208 g, 0.57 mmol), 2,4-dichlorophenol (473 mg, 2.85 mmol), cesium carbonate (0.400 g, 1.13 mmol), copper (II) trifluoromethanesulfonate (10 mg, 0.03 mmol) and activated (powdered) 5A molecular sieves (0.330 g) is added anhydrous toluene (3.5 ml). The mixture is purged with nitrogen then heated at 16O0C for 1 hour under microwave irradiation. After cooling to room temperature the reaction mixture is diluted with dichloromethane and 2M hydrochloric acid, then filtered and the organic phase separated. After concentration in vacuo the residue is purified by preparative reverse phase HPLC to afford 4-[2-cyclopropyl-5-(2,4-dichlorophenoxy)-phenyl]-2, 2,6,6- tetramethylpyran-3,5-dione.
Example 12
Preparation of 4-r5-(4-chlorophenoxy)-2-trifluoromethoxyphenyl1-2,2,6,6-tetramethylpyran-3,5- dione
Figure imgf000062_0001
S t e p 1 : P r e p a r a t i o n o f 4-[1-(5-bromo-2-trifluoromethoxyphenyl)-methylidene]-2, 2,5,5- tetramethyldihydrofuran-3-one
Figure imgf000062_0002
To an ice-cold solution of 2,2,5, 5-tetramethyldihydrofuran-3-one (2.84g, 20.00mmol) in anhydrous 1 ,2-dimethoxyethane (6ml) is added sodium methoxide (1 .19g, 22.04mmol) in one portion. After stirring at this temperature for 5 minutes a solution of 5-bromo-2-trifluoromethoxybenzaldehyde (4.84g, 18.00mmol) in 1 ,2-dimethoxyethane (6ml) is added dropwise over l Omins, followed by stirring at 00C for a further 1 hour. After warming to room temperature the reaction mixture is diluted with ether and washed with 2M hydrochloric acid (x 2). Organic fractions are combined, dried over magnesium sulfate, filtered and the filtrate evaporated in vacuo to afford 4-[1-(5- bromo-2-trifluoromethoxyphenyl)-methylidene]-2,2,5,5-tetramethyldihydrofuran-3-one (7.06g) as an orange liquid. S t e p 2 : P re p a ra tion of 2-(5-bromo-2-trifluoromethoxyphenyl)-4,4,6,6-tetramethyl-1 ,5- dioxaspiro[2.4]heptan-7-one
Figure imgf000063_0001
To a solution of 4-[1-(5-bromo-2-trifluoromethoxyphenyl)-methylidene]-2,2,5,5-tetramethyl- dihydrofuran-3-one (7.06g, 18.00mmol) in methanol (300ml) at 35°C is added 50% aqueous hydrogen peroxide (1.80ml, 27.00mmol), immediately followed by 2 M aqueous lithium hydroxide (1.8OmI, 3.60mmol). After stirring at this temperature for 1 hour the reaction mixture is allowed to cool, then quenched with 10% sodium metabisulfite solution (negative Kl-starch indicator test). The reaction mixture is extracted with diethyl ether (x 3), then the organic phase is further washed with saturated aqueous sodium bicarbonate (x 2) then brine. All organics are combined, dried over magnesium sulfate, filtered and the filtrate concentrated in vacuo to afford 2-(5-bromo-2- trifluoromethoxyphenyl)-4,4,6,6-tetramethyl-1 ,5-dioxaspiro[2.4]heptan-7-one (6.34g, 86%) as a yellow oil.
Step 3: Preparation of 4-(5-bromo-2-trifluoromethoxyphenyl)-2,2,6,6-tetramethylpyran-3,5-dione
Figure imgf000063_0002
To an ice-cold solution of concentrated sulphuric acid (10ml) is added a second solution of 2-(5- bromo-2-trifluoromethoxyphenyl)-4,4,6,6-tetramethyl-1 ,5-dioxaspiro[2.4]heptan-7-one (6.34g, 15.00mmol) in 1 ,2-dichloroethane (10ml) dropwise over 5 minutes. This biphasic mixture is stirred vigorously for 2 hours at O0C, then poured into ice-water, rinsing with a small amount of additional 1 ,2-dichloroethane/water. This mixture is then concentrated under vacuum to remove all organic solvents, until a free-flowing solid was produced. The solid is filtered, washed with water then isohexane, followed by drying under vacuum overnight. The solid is next redissolved in ethyl acetate, dried over magnesium sulfate, filtered and the filtrate concentrated in vacuo to afford 4- (5-bromo-2-trifluoromethoxyphenyl)-2,2,6,6-tetramethylpyran-3,5-dione (4.17g, 68%).
Step 4 : Preparation of 4-[5-(4-chlorophenoxy)-2-trifluoromethoxyphenyl]-2, 2,6,6- tetramethylpyran-3,5-dione
Figure imgf000064_0001
To a mixture of 4-(5-bromo-2-trifluoromethoxyphenyl)-2,2,6,6-tetramethylpyran-3,5-dione (0.254g, 0.62mmol), 4-chlorophenol (0.40Og, 3.1 1 mmol), cesium carbonate (0.440g, 1 .25mmol), copper (II) trifluoromethanesulfonate (1 1 mg, 0.03mmol) and powdered 4A molecular sieves (0.40g) is added anhydrous toluene (3.5ml). After flushing with nitrogen the mixture is heated at 160°C for 1 hour under microwave irradiation, then cooled to room temperature and quenched with 2M aqueous hydrochloric acid. The crude product is extracted with dichloromethane (x 3), and the organic fractions are combined, washed with brine, dried over magnesium sulfate and concentrated in vacuo. Purification by preparative reverse phase HPLC affords 4-[5-(4-chloro- phenoxy)-2-trifluoromethoxyphenyl]-2,2,6,6-tetramethylpyran-3,5-dione as a white powder.
Example 13
Preparation of acetic acid 4-r5-(4-cvano-2-fluorophenoxy)-2-ethylphenyl1-2,2,6,6-tetramethyl-5- oxo-5,6-dihvdro-2H-pyran-3-yl ester
Figure imgf000065_0001
To a solution of 4-[4-ethyl-3-(2,2,6,6-tetramethyl-3,5-dioxotetrahydropyran-4-yl)phenoxy]-3- fluorobenzonitrile (0.130 g, 0.31 mmol) in dichloromethane at O0C is added triethylamine (0.133 ml, 0.95 mmol) followed by acetyl chloride (0.067 ml, 0.95 mmol). The mixture is stirred at O0C for 60 minutes, then allowed to warm to room temperature and stir for a further 18 hours. After concentration in vacuo the crude product is purified by flash column chromatography on silica gel (iso-hexane/ethyl acetate eluant) to afford 4-[5-(4-cyano-2-fluorophenoxy)-2-ethylphenyl]-2, 2,6,6- tetramethyl-5-oxo-5,6-dihydro-2H-pyran-3-yl ester.
Additional compounds in Table T1 below were prepared by similar methods using appropriate starting materials. Table T1
Figure imgf000065_0002
Figure imgf000066_0001
Figure imgf000067_0001
Figure imgf000068_0001
Figure imgf000069_0001
Figure imgf000070_0001
Figure imgf000071_0001
Figure imgf000072_0001
Figure imgf000073_0001
Figure imgf000074_0001
(d,
7.31
5.73 2H), 1.12
-
1.46
(m, 6H),
6H),
Figure imgf000075_0001
Figure imgf000076_0001
Figure imgf000077_0001
Figure imgf000078_0001
Figure imgf000079_0001
Figure imgf000080_0001
Figure imgf000081_0001
Figure imgf000082_0001
Figure imgf000083_0001
Figure imgf000084_0001
Figure imgf000085_0001
Figure imgf000086_0001
7.22 (m, 2H), 1.19 (t, 3H)
- 2.49 (s,
Figure imgf000087_0001
Figure imgf000088_0001
Figure imgf000089_0001
Figure imgf000090_0001
2.49 2.49
Figure imgf000091_0001
Figure imgf000093_0001
7.41 (dd, 2H), (t,
Figure imgf000094_0001
Figure imgf000095_0001
Figure imgf000096_0001
Figure imgf000097_0001
Figure imgf000098_0001
2.53
1H), 2.65
Figure imgf000099_0001
4H),
Figure imgf000100_0001
Figure imgf000101_0001
Figure imgf000102_0001
Figure imgf000103_0001
Figure imgf000104_0001
7.00 (s, - 3H).
Figure imgf000105_0001
Figure imgf000106_0001
Figure imgf000107_0001
2.48
Figure imgf000108_0001
Figure imgf000109_0001
1.49
(d, -
and m,
Figure imgf000110_0001
Figure imgf000111_0001
(dd, m,
Figure imgf000112_0001
Figure imgf000113_0001
1H), 2.65
H, 1.60
Figure imgf000114_0001
H,
Figure imgf000115_0001
Figure imgf000116_0001
Figure imgf000117_0001
7.14 1.49 0.55
Figure imgf000118_0001
Figure imgf000119_0001
2.48 (m,
Figure imgf000120_0001
Figure imgf000121_0001
Figure imgf000122_0001
Figure imgf000123_0001
Figure imgf000124_0001
7.22
Figure imgf000125_0001
Figure imgf000126_0001
Figure imgf000127_0001
Figure imgf000128_0001
Figure imgf000129_0001
Figure imgf000130_0001
Figure imgf000131_0001
Figure imgf000132_0001
Figure imgf000133_0001
Figure imgf000134_0001
Figure imgf000135_0001
Figure imgf000136_0001
Figure imgf000137_0001
Figure imgf000138_0001
Table P1
Figure imgf000138_0002
Figure imgf000139_0001
It should be noted that certain compounds of the invention exist as a mixture of isomers, including atropisomers, noted above, under the conditions used to obtain the 1H NMR data. Where this has occurred, the characterising data are reported for all isomers present at ambient temperature in the specified solvent. Unless otherwise stated, proton NMR spectra were recorded at ambient temperature. Compounds characterised by HPLC-MS were analysed using one of two methods described below.
Method A
Compounds characterised by HPLC-MS were analysed using a Waters 2795 HPLC equipped with a Waters Atlantis dC18 column (column length 20 mm, internal diameter of column 3 mm, particle size 3 micron, temperature 40 0C), Waters photodiode array and Micromass ZQ2000. The analysis was conducted using a three minute run time, according to the following gradient table:
Figure imgf000140_0001
Solvent A: H2O containing 0.1 % HCOOH Solvent B: CH3CN containing 0.1 % HCOOH
Method B
Compounds characterised by HPLC-MS were analysed using an Waters 2777 injector with a 1525 micro pump HPLC equipped with a Waters Atlantis dC18 IS column (column length 20 mm, internal diameter of column 3 mm, particle size 3 micron), Waters 2996 photodiode array, Waters 2420 ELSD and Micromass ZQ2000. The analysis was conducted using a three minute run time, according to the following gradient table:
Figure imgf000140_0002
Solvent A: H2O with 0.05% TFA Solvent B: CH3CN with 0.05% TFA The characteristic values obtained for each compound were the retention time (rt, recorded in minutes) and the molecular ion (typically the cation MH+), as listed in Table T1.
The compounds of the following Tables 1 to 57 can be obtained in an analogous manner.
Table 1 covers compounds of the following type
Figure imgf000141_0001
wherein A is as defined in Table 1. Table 1
Figure imgf000141_0002
Figure imgf000142_0001
Figure imgf000143_0001
Figure imgf000144_0004
Table 2 covers compounds of the following type
Figure imgf000144_0001
wherein A is as defined in Table 1.
Table 3 covers compounds of the following type
Figure imgf000144_0002
wherein A is as defined in Table 1.
Table 4 covers compounds of the following type
Figure imgf000144_0003
wherein A is as defined in Table 1.
Table 5 covers compounds of the following type
Figure imgf000145_0001
wherein A is as defined in Table 1.
Table 6 covers compounds of the following type
Figure imgf000145_0002
wherein A is as defined in Table 1.
Table 7 covers compounds of the following type
Figure imgf000145_0003
wherein A is as defined in Table 1.
Table 8 covers compounds of the following type
Figure imgf000145_0004
wherein A is as defined in Table 1.
Table 9 covers compounds of the following type
Figure imgf000145_0005
wherein A is as defined in Table 1. Table 10 covers compounds of the following type
Figure imgf000146_0001
wherein A is as defined in Table 1.
Table 11 covers compounds of the following type
Figure imgf000146_0002
wherein A is as defined in Table 1.
Table 12 covers compounds of the following type
Figure imgf000146_0003
wherein A is as defined in Table 1.
Table 13 covers compounds of the following type
Figure imgf000146_0004
wherein A is as defined in Table 1.
Table 14 covers compounds of the following type
Figure imgf000146_0005
wherein A is as defined in Table 1.
Table 15 covers compounds of the following type
Figure imgf000147_0001
wherein A is as defined in Table 1.
Table 16 covers compounds of the following type
Figure imgf000147_0002
wherein A is as defined in Table 1.
Table 17 covers compounds of the following type
Figure imgf000147_0003
wherein A is as defined in Table 1.
Table 18 covers compounds of the following type
Figure imgf000147_0004
wherein A is as defined in Table 1.
Table 19 covers compounds of the following type
Figure imgf000148_0001
wherein A is as defined in Table 1.
Table 20 covers compounds of the following type
Figure imgf000148_0002
wherein A is as defined in Table 1.
Table 21 covers compounds of the following type
Figure imgf000148_0003
wherein A is as defined in Table 1.
Table 22 covers compounds of the following type
Figure imgf000148_0004
wherein A is as defined in Table 1.
Table 23 covers compounds of the following type
Figure imgf000148_0005
wherein A is as defined in Table 1.
Table 24 covers compounds of the following type
Figure imgf000149_0001
wherein A is as defined in Table 1.
Table 25 covers compounds of the following type
Figure imgf000149_0002
wherein A is as defined in Table 1.
Table 26 covers compounds of the following type
Figure imgf000149_0003
wherein A is as defined in Table 1.
Table 27 covers compounds of the following type
Figure imgf000149_0004
wherein A is as defined in Table 1.
Table 28 covers compounds of the following type
Figure imgf000150_0001
wherein A is as defined in Table 1.
Table 29 covers compounds of the following type
Figure imgf000150_0002
wherein A is as defined in Table 1.
Table 30 covers compounds of the following type
Figure imgf000150_0003
wherein A is as defined in Table 1.
Table 31 covers compounds of the following type
Figure imgf000150_0004
wherein A is as defined in Table 1.
Table 32 covers compounds of the following type
Figure imgf000150_0005
wherein A is as defined in Table 1.
Table 33 covers compounds of the following type
Figure imgf000151_0001
wherein A is as defined in Table 1.
Table 34 covers compounds of the following type
Figure imgf000151_0002
wherein A is as defined in Table 1.
Table 35 covers compounds of the following type
Figure imgf000151_0003
wherein A is as defined in Table 1.
Table 36 covers compounds of the following type
Figure imgf000151_0004
wherein A is as defined in Table 1.
Table 37 covers compounds of the following type
Figure imgf000151_0005
wherein A is as defined in Table 1.
Table 38 covers compounds of the following type
Figure imgf000152_0001
wherein A is as defined in Table 1.
Table 39 covers compounds of the following type
Figure imgf000152_0002
wherein A is as defined in Table 1.
Table 40 covers compounds of the following type
Figure imgf000152_0003
wherein A is as defined in Table 1.
Table 41 covers compounds of the following type
Figure imgf000152_0004
wherein A is as defined in Table 1.
Table 42 covers compounds of the following type
Figure imgf000152_0005
wherein A is as defined in Table 1.
Table 43 covers compounds of the following type
Figure imgf000153_0001
wherein A is as defined in Table 1.
Table 44 covers compounds of the following type
Figure imgf000153_0002
wherein A is as defined in Table 1.
Table 45 covers compounds of the following type
Figure imgf000153_0003
wherein A is as defined in Table 1.
Table 46 covers compounds of the following type
Figure imgf000153_0004
wherein A is as defined in Table 1.
Table 47 covers compounds of the following type
Figure imgf000154_0001
wherein A is as defined in Table 1.
Table 48 covers compounds of the following type
Figure imgf000154_0002
wherein A is as defined in Table 1.
Table 49 covers compounds of the following type
Figure imgf000154_0003
wherein A is as defined in Table 1.
Table 50 covers compounds of the following type
Figure imgf000154_0004
Table 51 covers compounds of the following type
Figure imgf000154_0005
wherein A is as defined in Table 1.
Table 52 covers compounds of the following type
Figure imgf000155_0001
wherein A is as defined in Table 1.
Table 53 covers compounds of the following type
Figure imgf000155_0002
wherein A is as defined in Table 1.
Table 54 covers compounds of the following type
Figure imgf000155_0003
wherein A is as defined in Table 1.
Table 55 covers compounds of the following type
wherein A is as defined in Table 1.
Table 56 covers compounds of the following type
Figure imgf000155_0005
wherein A is as defined in Table 1.
Table 57 covers compounds of the following type
Figure imgf000156_0001
wherein A is as defined in Table 1.
Biological Examples
Seeds of a variety of test species were sown in standard soil in pots. After cultivation for one day (pre-emergence) or after 8 days cultivation (post-emergence) under controlled conditions in a glasshouse (at 24/160C, day/night; 14 hours light; 65 % humidity), the plants were sprayed with an aqueous spray solution derived from the formulation of the technical active ingredient in acetone / water (50:50) solution containing 0.5% Tween 20 (polyoxyethelyene sorbitan monolaurate, CAS RN 9005-64-5). The test plants were then grown in a glasshouse under controlled conditions in a glasshouse (at 24/160C, day/night; 14 hours light; 65 % humidity) and watered twice daily. After 13 days for pre and post-emergence, the test was evaluated (100 = total damage to plant; 0 = no damage to plant).
Test plants:
Lolium perenne (LOLPE), Alopecurus myosuroides (ALOMY), Echinochloa crus-galli (ECHCG), and Avena fatua (AVEFA).
Pre-Emergence Activity
Figure imgf000156_0002
Figure imgf000157_0001
Figure imgf000158_0001
Figure imgf000159_0001
Figure imgf000160_0001
Figure imgf000161_0001
Figure imgf000162_0001
Figure imgf000163_0001
Figure imgf000164_0001
Figure imgf000165_0001
Figure imgf000166_0001
Figure imgf000167_0001
Figure imgf000168_0001
Figure imgf000169_0001
Figure imgf000170_0001
Figure imgf000171_0001
Figure imgf000172_0001
Post-Emergence Activity
Figure imgf000172_0002
Figure imgf000173_0001
Figure imgf000174_0001
Figure imgf000175_0001
Figure imgf000176_0001
Figure imgf000177_0001
Figure imgf000178_0001
Figure imgf000179_0001
Figure imgf000180_0001
Figure imgf000181_0001
Figure imgf000182_0001
Figure imgf000183_0001
Figure imgf000184_0001
Figure imgf000185_0001
Figure imgf000186_0001
Figure imgf000187_0001

Claims

What is claimed is:
1. A compound of formula I
Figure imgf000188_0001
wherein
A is a mono- or bicyclic aryl or heteroaryl which contains a heteratom selected from nitrogen, oxygen and sulfur, and which is unsubstituted or substituted,
R1 is methyl, ethyl, n-propyl, isopropyl, cyclopropyl, halomethyl, haloethyl, vinyl, propenyl, ethynyl, propynyl, halogen, methoxy, ethoxy, halomethoxy or haloethoxy,
R2 and R3 are independently of each other hydrogen, methyl, ethyl, n-propyl, isopropyl, cyclopropyl, halomethyl, haloethyl, vinyl, propenyl, ethynyl, propynyl, halogen, methoxy, ethoxy, halomethoxy or haloethoxy,
R4, R5, R6 and R7 are independently of each other hydrogen, C-i-C6alkyl, C-i-C6alkyl substituted by
CrC4alkoxy or halogen, C2-C6 alkenyl, C2-C6 alkenyl substituted by CrC4alkoxy or halogen,
C2-C6alkynyl, C2-C6alkynyl substituted by Ci-C4alkoxy or halogen, C3-C7cycloalkyl, C3-
C7cycloalkyl substituted by CrC4alkyl or Ci-C4alkoxy, C5-C7cycloalkenyl, C5-C7cycloalkenyl substituted by CrC4alkyl or Ci-C4alkoxy, heterocyclyl or heterocyclyl substituted by CrC4alkyl or
Ci-C4alkoxy, or
R4 and R5, or R6 and R7, together with the atoms to which they are bonded, form a 5- to 8- membered spiro-carbocyclyl or spiro-heterocyclyl, which contains one or two heteroatoms selected from nitrogen, oxygen or sulfur, or
R5 and R6, together with the atoms to which they are bonded, form a 5- to 8-membered carbocyclyl or heterocyclyl, which contains one or two heteroatoms selected from nitrogen, oxygen or sulfur,
Y is O, S(O)n, C=O, CR8R9 Or CR10R11CR12R13, n is O, 1 or 2,
R8 and R9 are independently of each other hydrogen, Ci-C6alkyl, Ci-C6alkyl substituted by Cr
C4alkoxy or halogen, C2-C6 alkenyl, C2-C6 alkenyl substituted by CrC4alkoxy or halogen, C2-C6alkynyl, C2-C6alkynyl substituted by CrC4alkoxy or halogen, C3-C7cycloalkyl, C3-
C7cycloalkyl substituted by CrC4alkyl or Ci-C4alkoxy, C5-C7cycloalkenyl, C5-C7cycloalkenyl substituted by CrC4alkyl or Ci-C4alkoxy, heterocyclyl or heterocyclyl substituted by CrC4alkyl or
Ci-C4alkoxy, or
R8 and R9, together with the atoms to which they are bonded, form a 5- to 8-membered spiro- carbocyclyl or spiro-heterocyclyl, which contains one or two heteroatoms selected from nitrogen, oxygen or sulfur, and
R10, R11, R12 and R13 are independently of each other hydrogen, CrCβalkyl or d-Cβalkoxy, and
G is hydrogen or an agriculturally acceptable metal, sulfonium, ammonium or latentiating group.
2. A compound according to claim 1 , wherein A is phenyl, naphthyl, a 5- or 6-membered heteroaryl or a bicyclic 8- to 10-membered heteroaryl.
3. A compound according to claim 1 , wherein A is substituted by by halogen, Ci-C4alkyl, CrC4haloalkyl, C2-C4alkenyl, C2-C4haloalkenyl, C2-C4alkynyl, Ci-C4alkoxy, CrC4haloalkoxy, CrC4alkylthio, CrC4alkylsulfinyl, Ci-C4alkylsulfonyl, Ci-C4haloalkylthio, Ci-C4haloalkylsulfinyl, Ci-C4haloalkylsulfonyl, nitro, cyano, C3-C6cycloalkyl, Ci-C3alkylcarbonyl, Ci-C4alkoxycarbonyl, aminocarbonyl, Ci-C3alkylaminocarbonyl, di-Ci-C3alkylaminocarbonyl, Cr C3alkylaminocarbonyloxy, di-Ci-C3alkylaminocarbonyloxy, aminothiocarbonyl, Cr C3alkylaminothiocarbonyl, diCi-C3alkylaminothiocarbonyl, Ci-C4alkylcarbonylamino, C3- Cβcycloalkylcarbonylamino, Ci-C4alkoxycarbonylamino,Ci-C4alkylthiocarbonylamino, Cr C3alkoxyCrC3alkyl, Ci-C6alkylthioCi-C6alkyl, Ci-C6alkylsulfinylCi-C6alkyl, Ci-C6alkylsulfonylCr Cβalkyl, Ci-C3alkylsulfonyloxy, Ci-C3haloalkylsulfonyloxy or diCi-Cβalkylaminosulfonyl, or 2 substituents on adjacent carbon atoms of A together form a C3-C4alkylene, wherein 1 or 2 methylene groups are optionally substituted by halogen, or wherein 1 or 2 of these methylene groups are replaced by oxygen.
4. A compound according to claim 1 , wherein R1 is methyl, ethyl, n-propyl, cyclopropyl, halogen or Ci-C2haloalkoxy.
5. A compound according to claim 1 , wherein R2 and R3 are independently of each other hydrogen, methyl or halogen.
6. A compound according to claim 1 , wherein R4, R5, R6 and R7 are independently of each other hydrogen or Ci-Cβalkyl, or R4 and R5, or R6 and R7 together with the atoms to which they are bonded form a spiro-tetrahydropyranyl or a spiro-tetrahydrofuranyl, or R5 and R6 together with the atoms to which they are bonded form a 6- or 7-membered carbocyclyl.
7. A compound according to claim 1 , wherein Y is O or CR8R9, wherein R8 and R9 are as defined in claim 1.
8. A compound according to claim 1 , wherein G is hydrogen.
9. A compound according to claim 1 , wherein A is phenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, benzothiazolyl, benzoxazolyl, cinnolinyl, quinolinyl, quinazolinyl, quinoxalinyl or benzotriazinyl, in each case substituted by halogen, methyl, trifluorom ethyl, nitro or cyano, R1 is ethyl, R2 and R3 are hydrogen, R4 to R7 are hydrogen or methyl, or R5 and R6, together with the atoms to which they are bonded, form a 6- or 7-membered carbocyclyl,
Y is O or CR8R9, whrein R8 and R9 are independently of each other hydrogen or methyl, or R8 and R9, together with the atoms to which they are bonded, form a spiro-tetrahydropyranyl or a spiro-tetrahydrofuranyl, and G is hydrogen.
10. A process for the preparation of a compound of formula I according to claim 1 , wherein G is hydrogen, which comprises the reaction of a compound of formula (K)
Figure imgf000190_0001
(K) .
wherein Y and R1 to R7 are as defined in claim 1 and Hal is bromine or iodine, with a compound A-OH, wherein A is as defined in claim 1 , in the presence of a catalyst, a ligand or additive, and a base, in a solvent.
11. A process for the preparation of a compound of formula I according to claim 1 , wherein G is hydrogen, which comprises the reaction of a compound of formula (M)
Figure imgf000191_0001
(M),
wherein Y and R1 to R7 are as defined in claim 1 , with a compound A-HaI, wherein A is as defined in claim 1 and Hal is fluorine, chlorine, bromine or iodine, in the presence or absence of a catalyst and ligand, and in the presence of a base, and in a solvent.
12. A compound of formula (M)
Figure imgf000191_0002
(M), wherein Y and R1 to R7 are as defined in claim 1.
13. A herbicidal composition, which, in addition to comprising formulation adjuvants, comprises a herbicidally effective amount of a compound of formula I.
14. A method of controlling grasses and weeds in crops of useful plants, which comprises applying a herbicidally effective amount of a compound of formula I, or of a composition comprising such a compound, to the plants or to the locus thereof.
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US20120021907A1 (en) 2012-01-26
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