WO1996017840A1 - Heterocyclyl substituted hydroxyacetamide derivatives as fongicides - Google Patents
Heterocyclyl substituted hydroxyacetamide derivatives as fongicides Download PDFInfo
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- WO1996017840A1 WO1996017840A1 PCT/GB1995/002849 GB9502849W WO9617840A1 WO 1996017840 A1 WO1996017840 A1 WO 1996017840A1 GB 9502849 W GB9502849 W GB 9502849W WO 9617840 A1 WO9617840 A1 WO 9617840A1
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- C07D207/30—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members
- C07D207/32—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
- C07D207/33—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms with substituted hydrocarbon radicals, directly attached to ring carbon atoms
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- C07D261/00—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings
- C07D261/02—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings not condensed with other rings
- C07D261/04—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D263/00—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
- C07D263/02—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings
- C07D263/30—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D263/32—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D307/38—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D307/54—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
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- C—CHEMISTRY; METALLURGY
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- C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
- C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
- C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
- C07D333/06—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring carbon atoms
- C07D333/24—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
- C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
- C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
- C07D333/26—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom 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
- C07D333/28—Halogen atoms
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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
- C07D409/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings
- C07D409/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings directly linked by a ring-member-to-ring-member bond
Definitions
- This invention relates to new derivatives of mandelic acid useful as fungicides.
- Substituted arylacetamides are described as active components in herbicides (JP 58/032853) and as compositions for treating skin diseases (EP 98743).
- Q is optionally substituted heterocyclyl
- Z is optionally substituted hydroxy or mercapto
- R 1 , R 2 and R 3 are phenyl or alkyl, each of which is optionally substituted, or hydrogen;
- Y is phenyl, heteroaryl or alkyl, each of which is optionally substituted, or hydrogen; and when W is 0 or N(R 3 ), and/or E is (ii) or (iii), Y is also optionally substituted phenyl, together with salts and complexes with metal salts.
- O, S, S0 2 , CO or O-CO and D is alkyl, cycloalkyl, cycloalkenyl, alkenyl, alkynyl, phenyl, heterocyclyl or amino, (each of which is optionally substituted) or when m is 1 can also be hydrogen; or two adjacent groups on the ring together with the atoms to which they are attached can form an homo or hetero ring which may be similarly substituted as for phenyl.
- Z is preferably unsubstituted, but optional substituents include for example those defined under D or acyl.
- substituents include for example those defined under D or acyl., but are usually alkyl, especially methyl.
- heterocyclyl includes both aromatic and non-aromatic heterocyclyl groups.
- Heterocyclyl groups are generally 5, 6 or 7-membered rings containing up to 4 hetero atoms selected from nitrogen, oxygen and sulfur.
- Examples of heterocyclyl groups are furyl, thienyl, pyrrolyl, pyrroiinyl, pyrrolidinyl, imidazolyl, dioxolanyl, oxazolyl, thiazolyl, imidazolyl, imidazolinyl, imidazolidinyl, pyrazolyl, pyrazolinyl, pyrazolidinyl, isoxazolyl, isothiazolyl, oxadiazolyl, triazolyl, thiadiazolyl, pyranyl, pyridyl, piperidinyl, dioxanyl, morpholino, dithianyl, thiomorpholino, pyridazinyl,
- Alkyl groups are preferably of 1 to 8, e.g. 1 to 6, carbon atoms.
- Alkenyl and alkynyl groups are generally of 3 to 6 carbon atoms.
- Cycloalkyl or cycloalkenyl groups are preferably of 3 to 8 carbon atoms.
- Substituents when present on any alkyl, cycloalkyl, cycloalkenyl, alkenyl or alkynyl moiety include halogen, azido, cyano, optionally substituted alkoxy, optionally substituted alkylthio, hydroxy, nitro, optionally substituted amino, acyl, acyloxy, optionally substituted phenyl, optionally substituted heterocyclyl, optionally substituted phenoxy and optionally substituted heterocyclyloxy.
- Cycloalkyl or cycloalkenyl groups may also be substituted by alkyl.
- Amino groups may be substituted for example by one or two optionally substituted alkyl or acyl groups, or two substituents can form a ring, preferably a 5 to 7-membered ring, which may be substituted and may contain other hetero atoms, for example morpholine, thiomorpholine, or piperidine.
- acyl includes the residue of sulfur and phosphorus-containing acids as well as carboxylic acids.
- Salts of compounds of the invention are usually those of agriculturally acceptable metal cations or organic bases, especially tertiary amines.
- Complexes of compounds of the invention are usually formed from a salt of formula MAn 2 , in which M is a divalent metal cation, e.g. copper, manganese, cobalt, nickel, iron or zinc and An is an anion, e.g. chloride, nitrate, sulfate or acetate.
- M is a divalent metal cation, e.g. copper, manganese, cobalt, nickel, iron or zinc
- An is an anion, e.g. chloride, nitrate, sulfate or acetate.
- the compounds of the invention have activity as fungicides, especially against fungal diseases of plants, e.g. mildews and particularly barley powdery mildew (Erysiphe graminis) and vine downy mildew (Plasmopara viticola), rice blast (Pyricularia oryzae), cereal eyespot (Pseudocercosporella herpotrichoides), rice sheath blight (Pellicularia sasakii).
- the compounds of the invention are generally formulated in conventional compositions used for fungicides. These compositions can contain one or more additional pesticides, for example compounds known to possess herbicidal, fungicidal, insecticidal, acaricidal or nematicidal properties.
- the diluent or carrier in the composition of the invention can be a solid or a liquid optionally in association with a surface-active agent, for example a dispersing agent, emulsifying agent or wetting agent.
- Suitable surface-active agents include anionic compounds such as a carboxylate, for example a metal carboxylate of a long chain fatty acid; an N-acylsarcosinate; mono- or di-esters of phosphoric acid with fatty alcohol ethoxylates or salts of such esters; fatty alcohol sulfates such as sodium dodecyl sulfate, sodium octadecyl sulfate or sodium cetyl sulfate; ethoxylated fatty alcohol sulfates; ethoxylated alkylphenol sulfates; lignin sulfonates; petroleum sulfonates; alkyl-aryl sulfonates such as alkyl-benzene s
- butyl-naphthalene sulfonate salts of sulfonated naphthalene-formaldehyde condensates; salts of sulfonated phenol-formaldehyde condensates; or more complex sulfonates such as the amide sulfonates, e.g. the sulfonated condensation product of oleic acid and N-methyl taurine or the dialkyl sulfosuccinates, e.g. the sodium sulfonate of dioctyl succinate.
- amide sulfonates e.g. the sulfonated condensation product of oleic acid and N-methyl taurine or the dialkyl sulfosuccinates, e.g. the sodium sulfonate of dioctyl succinate.
- Nonionic agents include condensation products of fatty acid esters, fatty alcohols, fatty acid amides or fatty-alkyl- or alkenyl-substituted phenols with ethylene oxide, fatty esters of polyhydric alcohol ethers, e.g. sorbitan fatty acid esters, condensation products of such esters with ethylene oxide, e.g. polyoxyethylene sorbitan fatty acid esters, block copolymers of ethylene oxide and propylene oxide, acetylenic glycols such as 2,4,7,9-tetramethyl-
- a cationic surface-active agent examples include, for instance, an aliphatic mono-, di-, or polyamine as an acetate, naphthenate or oleate; an oxygen-containing amine such as an amine oxide or polyoxyethylene alkylamine; an amide-linked amine prepared by the condensation of a carboxylic acid with a di- or polyamine; or a quaternary ammonium salt.
- compositions of the invention can take any form known in the art for the formulation of agrochemicals, for example, a solution, a dispersion, an aqueous emulsion, a dusting powder, a seed dressing, a fumigant, a smoke, a dispersible powder, an emulsifiable concentrate or granules. Moreover it can be in a suitable form for direct application or as a concentrate or primary composition which requires dilution with a suitable quantity of water or other diluent before application.
- the composition comprises a compound of the invention dispersed in a liquid medium, preferably water. It is often convenient to supply the consumer with a primary composition which can be diluted with water to form a dispersion having the desired concentration.
- the primary composition can be provided in any one of the following forms. It can be a dispersible solution which comprises a compound of the invention dissolved in a water-miscible solvent with the addition of a dispersing agent.
- a further alternative comprises a compound of the invention in the form of a finely ground powder in association with a dispersing agent and intimately mixed with water to give a paste or cream which can if desired be added to an emulsion of oil in water to give a dispersion of active ingredient in an aqueous oil emulsion.
- An emulsifiable concentrate comprises a compound of the invention dissolved in a water-immiscible solvent together with an emulsifying agent and which is formed into an emulsion on mixing with water.
- a dusting powder comprises a compound of the invention intimately mixed with a solid pulverulent diluent, for example, kaolin.
- a granular solid comprises a compound of the invention associated with similar diluents to those which may be employed in dusting powders, but the mixture is granulated by known methods. Alternatively it comprises the active ingredient adsorbed or absorbed on a pre-granular diluent, for example, Fuller's earth, attapulgite or limestone grit.
- a wettable powder usually comprises the active ingredient in admixture with a suitable surfactant and an inert powder diluent such as china clay.
- Another suitable concentrate particularly when the product is a solid, is a flowable suspension concentrate which is formed by grinding the compound with water, a wetting agent and a suspending agent.
- the concentration of the active ingredient in the composition of the present invention is preferably within the range of 1 to 30 per cent by weight, especially 5 to 30 per cent by weight.
- the amount of active ingredient can vary widely and can be, for example, from 5 to 95 per cent by weight of the composition.
- the compounds of the invention may be prepared in known manner.
- This reaction gives a compound where R 1 is H and Z is OH.
- the reduction is generally carried out using a reducing agent, especially a metal hydride e.g. lithium aluminium hydride or lithium borohydride, or diborane.
- a reducing agent especially a metal hydride e.g. lithium aluminium hydride or lithium borohydride, or diborane.
- a solvent preferably a polar solvent, such as an alcohol, e.g. methanol, ethanol or propanol, an ether or water or mixtures of these.
- FT Conventional peptide coupling conditions may be used e.g. using a mixture of N-hydroxysuccinimide and dicyclohexylcarbodiimide, especially when L is hydroxy.
- the amines of formula IV can be obtained in known manner as described for example in Bull. Chem. Soc. Jap. 1 990, __ ⁇ , 1252; Angew. Chem. 1989, 101 . 202 and 1992, 104, 914; Heterocycles, 1987, 2_6, 1 595 and J. Med. Chem.
- reaction can take place in the presence of a mineral or carboxylic acid or be carried out via an intermediate of formula Via
- the compounds of formula II to X are either known or can be prepared in known manner.
- Y-W-NH-CHO (Vlb) with a dehydrating agent such as triphosgene.
- a compound of formula I, where E is defined under (ii), may be treated with a base followed by an optionally substituted alkyl or phenyl halide to give a compound where E is defined under (iii).
- Compounds of formula I may be modified in known manner to give other compounds of formula I where one of the groups is modified to another desired group.
- compounds of formula I, where Z is hydroxy can be treated to give compounds where Z has other desired values, e.g. by acylation or alkylation, in known manner.
- Example 1 The invention is illustrated in the following Examples. Structures of isolated novel compounds were confirmed by elemental and/or other appropriate analyses. Temperatures are in °C. Example 1
- N-bromosuccinimide ((4.094 g) was added to a solution of hydroxyiminoacetic acid (1 .012 g) in dimethoxyethane (1 5 ml) and water (2.25 ml) at 0°. The mixture was stirred for a few hours at room temperature and kept at 0° overnight. It was then added dropwise to a solution of ethyl 2-hydroxybut-3-enoate, and potassium hydrogen carbonate (4.6 g) in dimethoxyethane (7.5 ml).
- Lithium hydroxide monohydrate (0.25 g) was added to a solution of this (0.5 g) in tetrahydrofuran ( 1 ml) and water (3 ml) at 0°. The mixture was stirred for 1 !_ hours at room temperature, acidified with hydrochloric acid and extracted with ethyl acetate. The extract was washed with brine, dried and evaporated to give the title product, which solidified on standing.
- Lawesson's reagent (2,4-bis(4-methoxyphenyl)-l ,2,3,4-dithiadiphosphetane
- a mixture comprising a solution of mandelic acid (3 g) in dichloromethane (40 ml), a catalytic amount of 4-(dimethylamino)pyridine, pyridine (3.24 g) and trimethylsilyl chloride (4.5 g) was stirred at room temperature for 3 hours.
- Example 13 To a solution of 4-chloromandelic acid (3.0 g) in 1 ,2-dimethoxyethane (35 ml) at room temperature, there was added N-hydroxysuccinimide (1 .85 g) followed by dicyclohexylcarbodiimide (3.32 g). The mixture was stirred for 45 minutes at room temperature. To this was added a solution of O-benzylhydroxylamine hydrochloride (2.81 g) and N,N-diisopropyl-ethylamine (3.1 ml) in 1 ,2-dimethoxyethane (30 ml), which had been prestirred for 1 V. hours and filtered.
- Compounds are assessed for activity against one or more of the following:
- Plasmopara viticola vine downy mildew Pyricularia oryzae: rice blast
- Botrytis cinerea grey mould
- Leptosphaeria nodorum glume blotch Aqueous solutions or dispersions of the compounds at the desired concentration, including a wetting agent, were applied by spray or by drenching the stem base of the test plants, as appropriate. Plants or plant parts were then inoculated with appropriate test pathogens and kept under controlled environment conditions suitable for maintaining plant growth and development of the disease. After an appropriate time, the degree of infection of the affected part of the plant was visually estimated. Compounds were considered active if they gave greater than 50% control of the disease at a concentration of 500 ppm (w/v) or less.
Abstract
Compounds of formula (I) wherein Q is optionally substituted heterocyclyl; Z is optionally substituted hydroxy or mercapto; E is (i) CO--N(R2), (ii) CS--N(R2) or (iii) C(SR2) = N; W is O, N(R3), optionally substituted methylene or ethylene; R?1, R2 and R3¿ are phenyl or alkyl, each of which is optionally substituted, or hydrogen; Y is phenyl, heteroaryl or alkyl, each of which is optionally substituted, or hydrogen; and when W is O or N(R3), and/or E is (ii) or (iii), Y is also optionally substituted phenyl, have fungicidal activity.
Description
HETEROCYCLYL SUBSTITUTED HYDROXYACETAMIDE DERIVAΗVES AS FUNGICIDES
Field of the invention
This invention relates to new derivatives of mandelic acid useful as fungicides.
Prior art
Substituted arylacetamides are described as active components in herbicides (JP 58/032853) and as compositions for treating skin diseases (EP 98743).
Disclosure of the invention
According to the invention there is provided the use for combating phytopathogenic fungi, of a compound of formula I
Z
Q C E W Y I
wherein
Q is optionally substituted heterocyclyl;
Z is optionally substituted hydroxy or mercapto;
E is (i) CO--N(R2), (ii) CS--N(R2) or (iii) C(SR2) = N W is O, N(R3), optionally substituted methylene or ethylene;
R1, R2 and R3 are phenyl or alkyl, each of which is optionally substituted, or hydrogen;
Y is phenyl, heteroaryl or alkyl, each of which is optionally substituted, or hydrogen; and when W is 0 or N(R3), and/or E is (ii) or (iii), Y is also optionally substituted phenyl, together with salts and complexes with metal salts.
Most of the compounds are novel and the invention includes compounds of general formula I as defined above with the exception that when E is defined as in (i), W is NH, R1 is H and Y is hydrogen, then Q is substituted.
Substituents when present on any phenyl or heterocyclyl group, or on A, include for example halogen, cyano or nitro, or the group D-(L)m-, where m is 0 or 1 , L is
O, S, S02, CO or O-CO and D is alkyl, cycloalkyl, cycloalkenyl, alkenyl, alkynyl, phenyl, heterocyclyl or amino, (each of which is optionally substituted) or when m is 1 can also be hydrogen; or two adjacent groups on the ring together with the atoms to which they are attached can form an homo or hetero ring which may be similarly substituted as for phenyl.
Z is preferably unsubstituted, but optional substituents include for example those defined under D or acyl.
When W is substituted methylene or ethylene, substituents include for example those defined under D or acyl., but are usually alkyl, especially methyl.
The term heterocyclyl includes both aromatic and non-aromatic heterocyclyl groups. Heterocyclyl groups are generally 5, 6 or 7-membered rings containing up to 4 hetero atoms selected from nitrogen, oxygen and sulfur. Examples of heterocyclyl groups are furyl, thienyl, pyrrolyl, pyrroiinyl, pyrrolidinyl, imidazolyl, dioxolanyl, oxazolyl, thiazolyl, imidazolyl, imidazolinyl, imidazolidinyl, pyrazolyl, pyrazolinyl, pyrazolidinyl, isoxazolyl, isothiazolyl, oxadiazolyl, triazolyl, thiadiazolyl, pyranyl, pyridyl, piperidinyl, dioxanyl, morpholino, dithianyl, thiomorpholino, pyridazinyl, pyrimidinyl, pyrazinyl, piperazinyl, triazinyl, thiazolinyl, benzimidazolyl, tetrazolyl, benzoxazolyl, imidazopyhdinyl, 1 ,3-benzoxazinyl, 1 ,3-benzothiazinyl, oxazolopyridinyl, benzofuranyl, quinolinyl, quinazolinyl, quinoxalinyl, sulfolanyl, dihydroquinazolinyl, benzothiazolyl, phthalimido, benzofuranyl, azepinyl, oxazepinyl, thiazepinyl, diazepinyl and benzodiazepinyl.
Alkyl groups are preferably of 1 to 8, e.g. 1 to 6, carbon atoms. Alkenyl and alkynyl groups are generally of 3 to 6 carbon atoms. Cycloalkyl or cycloalkenyl groups are preferably of 3 to 8 carbon atoms.
Substituents, when present on any alkyl, cycloalkyl, cycloalkenyl, alkenyl or alkynyl moiety include halogen, azido, cyano, optionally substituted alkoxy, optionally substituted alkylthio, hydroxy, nitro, optionally substituted amino, acyl,
acyloxy, optionally substituted phenyl, optionally substituted heterocyclyl, optionally substituted phenoxy and optionally substituted heterocyclyloxy.
Cycloalkyl or cycloalkenyl groups may also be substituted by alkyl.
Amino groups may be substituted for example by one or two optionally substituted alkyl or acyl groups, or two substituents can form a ring, preferably a 5 to 7-membered ring, which may be substituted and may contain other hetero atoms, for example morpholine, thiomorpholine, or piperidine.
The term acyl includes the residue of sulfur and phosphorus-containing acids as well as carboxylic acids. Examples of acyl groups are thus -COR5, -COOR5, -CXNR5Rβ, -CON(R5)ORβ, -COOI _R5Rβ, -CON(R5)NR6R7, -COSR5, -CSSR5, -S(O)pR5, -S(O)2OR5, -S(0)pNR5Rβ, -P( = X)(OR5)(OR6), -CO-COOR5, where R5, Rβ and R7 which may be the same or different, are hydrogen, optionally substituted alkyl, optionally substituted cycloalkyl, optionally substituted cycloalkenyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted phenyl or optionally substituted heterocyclyl or R6 and R7 together with the atom(s) to which they are attached can form a ring, p is 1 or 2 and X is 0 or S.
Salts of compounds of the invention are usually those of agriculturally acceptable metal cations or organic bases, especially tertiary amines.
Complexes of compounds of the invention are usually formed from a salt of formula MAn2, in which M is a divalent metal cation, e.g. copper, manganese, cobalt, nickel, iron or zinc and An is an anion, e.g. chloride, nitrate, sulfate or acetate.
The compounds of the invention have activity as fungicides, especially against fungal diseases of plants, e.g. mildews and particularly barley powdery mildew (Erysiphe graminis) and vine downy mildew (Plasmopara viticola), rice blast (Pyricularia oryzae), cereal eyespot (Pseudocercosporella herpotrichoides), rice sheath blight (Pellicularia sasakii). grey mould (Botrytis cinerea), damping off (Rhizoctonia solani), wheat brown rust (Puccinia recondita), late tomato or potato
blight (Phytophthora infestans), apple scab ( Venturia inaequalis), glume blotch
(Leptosphaeria nodorum). Other fungi against which the compounds may be active include other powdery mildews, other rusts, and general pathogens of
Deuteromycete, Ascomycete, Phycomycete and Basidomycete origin.
The compounds of the invention are generally formulated in conventional compositions used for fungicides. These compositions can contain one or more additional pesticides, for example compounds known to possess herbicidal, fungicidal, insecticidal, acaricidal or nematicidal properties.
The diluent or carrier in the composition of the invention can be a solid or a liquid optionally in association with a surface-active agent, for example a dispersing agent, emulsifying agent or wetting agent. Suitable surface-active agents include anionic compounds such as a carboxylate, for example a metal carboxylate of a long chain fatty acid; an N-acylsarcosinate; mono- or di-esters of phosphoric acid with fatty alcohol ethoxylates or salts of such esters; fatty alcohol sulfates such as sodium dodecyl sulfate, sodium octadecyl sulfate or sodium cetyl sulfate; ethoxylated fatty alcohol sulfates; ethoxylated alkylphenol sulfates; lignin sulfonates; petroleum sulfonates; alkyl-aryl sulfonates such as alkyl-benzene sulfonates or lower alkylnaphthalene sulfonates, e.g. butyl-naphthalene sulfonate; salts of sulfonated naphthalene-formaldehyde condensates; salts of sulfonated phenol-formaldehyde condensates; or more complex sulfonates such as the amide sulfonates, e.g. the sulfonated condensation product of oleic acid and N-methyl taurine or the dialkyl sulfosuccinates, e.g. the sodium sulfonate of dioctyl succinate. Nonionic agents include condensation products of fatty acid esters, fatty alcohols, fatty acid amides or fatty-alkyl- or alkenyl-substituted phenols with ethylene oxide, fatty esters of polyhydric alcohol ethers, e.g. sorbitan fatty acid esters, condensation products of such esters with ethylene oxide, e.g. polyoxyethylene sorbitan fatty acid esters, block copolymers of ethylene oxide and propylene oxide, acetylenic glycols such as 2,4,7,9-tetramethyl-
5-decyne-4,7-diol, or ethoxylated acetylenic glycols. Examples of a cationic surface-active agent include, for instance, an aliphatic mono-, di-, or polyamine as an acetate, naphthenate or oleate; an oxygen-containing amine such as an amine oxide or polyoxyethylene alkylamine; an amide-linked amine prepared by the
condensation of a carboxylic acid with a di- or polyamine; or a quaternary ammonium salt.
The compositions of the invention can take any form known in the art for the formulation of agrochemicals, for example, a solution, a dispersion, an aqueous emulsion, a dusting powder, a seed dressing, a fumigant, a smoke, a dispersible powder, an emulsifiable concentrate or granules. Moreover it can be in a suitable form for direct application or as a concentrate or primary composition which requires dilution with a suitable quantity of water or other diluent before application.
As a dispersion, the composition comprises a compound of the invention dispersed in a liquid medium, preferably water. It is often convenient to supply the consumer with a primary composition which can be diluted with water to form a dispersion having the desired concentration. The primary composition can be provided in any one of the following forms. It can be a dispersible solution which comprises a compound of the invention dissolved in a water-miscible solvent with the addition of a dispersing agent. A further alternative comprises a compound of the invention in the form of a finely ground powder in association with a dispersing agent and intimately mixed with water to give a paste or cream which can if desired be added to an emulsion of oil in water to give a dispersion of active ingredient in an aqueous oil emulsion.
An emulsifiable concentrate comprises a compound of the invention dissolved in a water-immiscible solvent together with an emulsifying agent and which is formed into an emulsion on mixing with water.
A dusting powder comprises a compound of the invention intimately mixed with a solid pulverulent diluent, for example, kaolin.
A granular solid comprises a compound of the invention associated with similar diluents to those which may be employed in dusting powders, but the mixture is granulated by known methods. Alternatively it comprises the active ingredient
adsorbed or absorbed on a pre-granular diluent, for example, Fuller's earth, attapulgite or limestone grit.
A wettable powder usually comprises the active ingredient in admixture with a suitable surfactant and an inert powder diluent such as china clay.
Another suitable concentrate, particularly when the product is a solid, is a flowable suspension concentrate which is formed by grinding the compound with water, a wetting agent and a suspending agent.
The concentration of the active ingredient in the composition of the present invention is preferably within the range of 1 to 30 per cent by weight, especially 5 to 30 per cent by weight. In a primary composition the amount of active ingredient can vary widely and can be, for example, from 5 to 95 per cent by weight of the composition.
The compounds of the invention may be prepared in known manner.
For example compounds where E is defined as under (i) may be obtained by a) reducing a compound of formula II
O
Q C E W Y ||
This reaction gives a compound where R1 is H and Z is OH. The reduction is generally carried out using a reducing agent, especially a metal hydride e.g. lithium aluminium hydride or lithium borohydride, or diborane. These reactions are generally carried out in a solvent, preferably a polar solvent, such as an alcohol, e.g. methanol, ethanol or propanol, an ether or water or mixtures of these.
b) by reacting a compound of formula III
1 wherein is hydroxy or a leaving group, e.g. a halogen, especially chlorine, or an ester forming group, e.g. alkoxy, with an amine of formula IV
Y W N H I
FT Conventional peptide coupling conditions may be used e.g. using a mixture of N-hydroxysuccinimide and dicyclohexylcarbodiimide, especially when L is hydroxy.
The amines of formula IV can be obtained in known manner as described for example in Bull. Chem. Soc. Jap. 1 990, __\, 1252; Angew. Chem. 1989, 101 . 202 and 1992, 104, 914; Heterocycles, 1987, 2_6, 1 595 and J. Med. Chem.
1971 , J_4, 322, 1 988, 21, 1 282, 1981 , 24, 1063 and 1 980, 23, 990 and USP 3,847,950.
c) by a Passerini reaction, in which a compound of formula V
O
■ H V is reacted with a compound of formula VI
Y — W — NΞ≡≡≡C VI
The reaction can take place in the presence of a mineral or carboxylic acid or be carried out via an intermediate of formula Via
Y — W N" :C — CI Vi a
iCI obtained by reacting the compound of formula IV with titanium tetrachloride.
d) by reacting a compound of formula VIII
Q-CH2-OR10 VIII where R 0 is hydrogen or alkyl, first with carbon dioxide in the presence of tert. butyllithium followed by reaction with a compound of formula IX
Y-W-NCO IX under basic conditions, e.g. in the presence of tert. -butyllithium.
e) by reacting a compound of formula X:
O
II
Q CH2 C NH W Y X with a strong base, usually two equivalents, e.g. lithium diisopropylamide, followed by a halogenating agent, e.g.N-bromosuccinimide, or an oxygenating agent, e.g. lead tetraacetate.
The compounds of formula II to X are either known or can be prepared in known manner.
For example compounds of formula II can be prepared in a similar manner to process b) using a compound of formula lla
Q-CO-CO-L (Ilia)
Compounds of formula III and Ilia can be obtained by methods described in for example Heterocycles, 1 985, 23, 585, Heterocycles, 1985, 23., 1 645, J. Org. Chem. 1 977, 42, 1 089, J. Org. Chem. 1 991 , .56, 2937, Tetrahedron, 1 982, 38, 1447, Jet. Letts. 1 987, .28 , 3971 , J. Chem. Soc. Perkin Trans 1 . 1 983, 221 9, J. Het. Chem, 1981 , 367, J. Org. Chem, 1 968, 33, 4376, J. Het. Chem, 1 983, 20, 385, Liebigs Annalen. Chem. 1 992, 1 281 , EP 23831 9, Tetrahedron, 1981 , 32, 3061 , J. Org. Chem. 1958, 23, 1 1 71 , Pol. J. Chem. 1982, 50, 433, Tet. Letts,
1 981 , 22, 2747, J. Org. Chem. 1 989, jS4, 5582, Liebigs Ann. Chem. 1994, 1 21 ,
Tet. Letts. 1 977, 2243, Tet. Letts. 1 977, 2973 and by analogy to methods described for the preparation of substituted mandelic acids in for example J. Org.
Chem. (1 978), 43, (1 3), 2702; Org. Synth. (1 945), 25, 33; Org. Synth. Col. Vol. IV, (1 963), 1 10; Org. Synth. Col. Vol. I, (1 941 ), 336-SE 7604030-2, Synthesis
(1 975), 1 63, Synth. Commun ( 1 981 ), 1 1 , 943; Org. Prep. Proced. (1 970), 2,
249, EP 140454.
Compounds of formula II can also be obtained by reacting a compound of formula III with a compound of formula VI or by reacting a compound of formula XI
XI
Q first with a strong base, e.g. butyllithium and then with a compound of formula XII
Y-W-NCO XII to give a compound of formula Xlla
237 (1975)) and the protecting dithianyl group is removed, e.g. by the method described by E.J. Corey, B.W. Erickson, J. Org. Chem. 36, 3553-3560, (1971 ).
Compounds of formula VI may be obtained by reacting the compound of formula Vlb
Y-W-NH-CHO (Vlb) with a dehydrating agent, such as triphosgene.
E NH XIII
R1 with a compound of formula XIV
Y-L XIV
Compounds where E is defined as under (ii) may be obtained from compounds where E is defined as under (i) by sulfurisation in known manner, e.g. using
Lawesson's reagent or phosphorus pentasulfide, to give compounds of formula I where E is CS-N(R2).
Compounds of formula I where E is defined as under (ii), W is optionally substituted methylene or ethylene and Q is optionally substituted phenyl are known, e.g. from WO 94/29267, or can be prepared by methods analogous to those described in that document.
A compound of formula I, where E is defined under (ii), may be treated with a base followed by an optionally substituted alkyl or phenyl halide to give a compound where E is defined under (iii).
When reacting compounds where Z is hydroxy or mercapto, it be advantageous to attach a protecting group to the hydroxy, e.g. a trimethylsilyl group which may subsequently be removed in conventional manner.
Compounds of formula I may be modified in known manner to give other compounds of formula I where one of the groups is modified to another desired group. For example compounds of formula I, where Z is hydroxy can be treated to give compounds where Z has other desired values, e.g. by acylation or alkylation, in known manner.
The invention is illustrated in the following Examples. Structures of isolated novel compounds were confirmed by elemental and/or other appropriate analyses. Temperatures are in °C.
Example 1
2-(3.5-Dichloro-2-thienyl)-N-f2-(3.4-dimethoxyDhenyl)ethyll-2-hvdroxyacetamide
A solution of sodium borohydride (0.10 g) in water (6 ml) was added dropwise to a suspension of 2-(3,5-dichloro-2-thienyl)-N-[2-(3,4-dimethoxyphenyl)ethyl]- 2-oxoacetamide (2.0 g) in ethanol (60 ml). After removal of the solvent under reduced pressure, the residue was washed with water and extracted with ethyl acetate. The extract was dried over magnesium sulfate and concentrated under reduced pressure evaporated and the residue worked up to give the title compound as a gum. (Mol peak: M + : 390.29) (Compound 1 )
In a similar manner there was obtained a) 2-hydroxy-2-indol-3-yl-N-(2-phenylethyl)acetamide, gum (Compound 1 a)
Example 2
A mixture of ethyl 2-hydroxy-2-(1 -tritylimidazole-4-yl)-acetate (0.51 5 g) and 2-(3,4-dimethoxyphenyl)ethylamine (0.23 g) was heated at 1 20°C for 3V- hours. The mixture was cooled and purified by silica gel chromatography to give N-[2- (3,4-dimethoxyphenyl)ethyl]-2-hydroxy-2-(1 -trityl-imidazole-4-yl)acetamide, foam. (compound 2)
Example 3
To a solution of 2-hydroxy-2-(3-thienyl)acetic acid (5.0 g) in 1 ,2-dimethoxyethane
(50 ml) at room temperature, there was added N-hydroxysuccinimide (3.63 g) followed by dicyclohexylcarbodiimide (6.51 g). The mixture was stirred for 30 minutes at room temperature. To this was added 2-(3,4- dimethoxyphenyDethylamine (5.35 ml) and 1 ,2-dimethoxyethane (5 ml). The mixture was stirred overnight at room temperature, filtered, the filtrate evaporated and the residue purified by silica gel column chromatography to give N-(2-(3,4- dimethoxyphenyl)ethyl]-2-hydroxy-2-(3-thienyl)acetamide, m.p. 1 10-4°. (compound 3)
Example 4
Acetyl chloride (0.1 6 ml) was added dropwise to a solution of compound 3a (0.7 g) in dichloromethane ( 10 ml) containing triethylamine (0.31 ml), cooled to 0°. The mixture was stirred under nitrogen overnight and poured into aqueous sodium hydrogen carbonate. The mixture was extracted with ethyl acetate and the extract was dried and evaporated and the residue worked up to give 2-acetoxy-2-
(6-chloro-3-pyridyl)-N-I2-(3,4-dimethoxyphenyl)ethyl]-acetamide, as a gum.
(compound 4)
Example 5
N-[2-(3,4-dimethoxyphenyl)ethyllf ormamide (3.135 g) and dry triethylamine (4.6 ml) in dry dichloromethane ( 1 5 ml) was stirred with cooling in ice water whilst triphosgene ( 1 .6 g) and dichloromethane (10 ml) was added dropwise. The mixture was stirred for 4 hours at 5°C and then cooled to -78°C. A solution of titanium tetrachloride ( 1 .65 ml) in dry dichloromethane (30 ml) was added and the mixture stirred for 2 hours allowing the temperature to rise to -40°C. Thiophene-2- carbaldehyde ( 1 .4 ml) in dry dichloromethane (10 ml) was added dropwise and the mixture allowed to rise to room temperature. The mixture was stirred overnight and 5N hydrochloric acid (8 ml) was added. The mixture was stirred for 1 .5 hours and the organic layer separated, washed with water, dried and evaporated. The residue was purified by silica gel chromatography to give 2-(2-thienyl)-N-[2- (3,4-dimethoxy-phenyl)ethyl]-2-hydroxyacetamide, m.p. 106-8°C. (Compound 5)
Example 6
Bromine (0.55 ml) was added to a solution of Compound 3 (3.46 g) in acetic acid (70 ml). The mixture was stirred for room temperature overnight, poured into water, neutralised with aqueous sodium hydrogen carbonate and extracted with ethyl acetate. The extract was washed with brine, dried and evaporated and the residue subjected to silica gel chromatography to give a) 2-acetoxy-N-[2-(2-bromo-4,5-dimethoxyphenyl)ethyl]-2-(3-thienyl)acetamide, m.p. 137-9° (Compound 6a) b) N-[2-(2-bromo-4,5-dimethoxyphenyl)ethyl]-2-(2-bromo-3-thienyl)- 2-hydroxyacetamide, gum, (Compound 6b)
c) N-[2-(2-bromo-4,5-dimethoxyphenyl)ethyl]-2-(3-thienyl)-2-hydroxyacetamide, m.p. 148-9°. (Compound 6c), and d) 2-bromo-N-[2-(2-bromo-4,5-dimethoxyphenyl)ethyl]-2-(3-thienyl)acetamide, m.p. 1 65-7. (Compound 6d)
Preparation of starting materials
2-(3.5-Dichloro-2-thienyl)-N-f2-(3.4-dimethoxy-phenyl)ethyll-2-oxoacetamide
A solution of 3,5-dichloro-2-thiophene-2-oxoacetyl chloride (4.66 g) in toluene (1 5 ml) was added dropwise, at room temperature, to a mixture of 2-(3,4- dimethoxyphenyDethylamine (3.47 g) in toluene (35 ml). The mixture heated up to 53°. After a short time a precipitate of triethylammonium chloride appeared. After stirring for 2 hours, the mixture was filtered, the precipitate was washed with toluene and the toluene phase concentrated under reduced pressure. The residue was extracted with ethyl acetate and the extract washed with water, dried over magnesium sulfate and evaporated under reduced pressure. The residue was recrystallised from ethanol to give the title compound, m.p. 1 28° (Mol peak: M + : 388.27).
2-hvdroxy-2-(3-thienyl)acetic acid Method 1
To an ice cold solution of lithium bromide (46.5 g) and potassium hydroxide (31 .3 g) in water (1 30 ml) was added dioxane ( 1 30 ml) and bromoform (71 .3 g), followed by 3-thiophenecarbaldehyde (31 .7 g). The mixture was stirred for 24 hours at room temperature, filtered and the precipitate washed with ether and suspended in a water ether mixture and acidified with hydrochloric acid. The ether layer was worked up to give the title compound, m.p. 104-6°.
Method 2 3-Thiophenecarbaldehyde (25 g) was added to a solution of sodium cyanide ( 1 4.2 g) in water (60 ml). Saturated aqueous sodium bisulfite (70 ml) was added together with ice (60 g) to keep the temperature below 30°. The mixture was allowed to stand overnight and the organic layer added to hydrochloric acid (9N; 1 00 ml). The mixture was stirred for 1 2 hours at room temperature. The aqueous
layer was extracted with ether and the extract worked up to give the title compound.
2-(6-chloro-3-Pyridyl)-2-hvdroxyacetic acid 6-Chloro-3-pyridylcarbonyl chloride (1 2 g) was dissolved in diglyme (68 ml) and cooled to -78°C under nitrogen. To this solution was added a 0.5 M solution of lithium aluminium tri-tert.-butoxyhydride in diglyme (135 ml), dropwise, over 1 V. hours, maintaining the temperature at -70°C. The mixture was stirred for one hour and poured into a mixture comprising concentrated hydrochloric acid (20 ml) saturated aqueous ammonium chloride (40 ml) and ice (20 g). The mixture was stirred and then silica was added , The mixture was stirred with ethyl acetate (100 ml) and left overnight under nitrogen with cooling. The mixture was filtered, the silica pad was washed with ethyl acetate and the combined organic materials were washed with water and aqueous sodium hydrogen carbonate, dried and evaporated under reduced pressure to give 6-chloro-3-pyridylcarbaldehyde.
This product (7.3 g) was dissolved in ethanol (45 ml) and malononitrile (3.25 ml) was added and washed in with ethanol (5 ml). Piperidine (3 drops) was added and the mixture heated to reflux for 2 to 3 minutes. The mixture was allowed to cool to room temperature and then stirred for one hour. The mixture was filtered and washed with diethyl ether to give (6-chloro-3-pyridylmethyl-idene)malononitrile. This product (0.76 g) was dissolved in acetonitrile (10 ml) over sulphuric acid (0.1 ml) was added. Diluted aqueous sodium hypochlorite (7.5 ml) was added in 0.5 ml portions with the pH being adjusted to 5, using 0.2 normal sulphuric acid after each portion. The mixture was added to water and stirred at room temperature for 45 minutes. It was filtered to give 2-chloro-5-(3,3-dicyanooxiran-2-yl)pyridine. A mixture of this product (3.0 g), dioxane (70 ml) and water (20 ml) was heated under nitrogen under reflux overnight. The mixture was concentrated under reduced pressure and the residue dissolved in water and washed with ether. The solution was evaporated to dryness to give the title compound, mp. 48-50°.
Ethyl 2-( 1 -tritylimidazole-4-yl)-2-hvdroxyacetate
Ethyl magnesium bromide (3 molar in ether; 2.1 ml) was added to a stirred solution under nitrogen of 1 trityl-4-iodoimidazole (2.5 g). The mixture was cooled
to 0° and a mixture of copper cyanide and lithium chloride (1 :2; 1 molar in tetrahydrofuran; 5.8 ml) was added. The mixture was stirred for 15 minutes and then cooled to -46°. A solution of ethyl chloroformate (0.5 ml) in dichloromethane
(4 ml) was added dropwise. The mixture was allowed warm to room temperature and stirred overnight. Dichloromethane (50 ml) was added and the mixture quenched with saturated aqueous ammonium chloride and a few drops of ammonia. The aqueous layer was extracted with dichloromethane and the extracts worked up to give ethyl 2-{1 -tritylimidazole-4-yl)-2-oxoacetate, as a brown solid.
To a stirred solution of this product (2.1 g) in dry tetrahydrofuran (40 ml) and dry ethanol (20 ml) was added sodium borohydride ( 1 g). The mixture was stirred for one hour at room temperature and evaporated to dryness. A mixture of ethyl acetate (100 ml) and water (30 ml) was added and the ethyl acetate layer collected, dried and worked up to give the title compound.
2-(3-bromo-4.5-dihvdroisoxazol-5-yl)-2-hvdroxyacetic acid N-bromosuccinimide ((4.094 g) was added to a solution of hydroxyiminoacetic acid (1 .012 g) in dimethoxyethane (1 5 ml) and water (2.25 ml) at 0°. The mixture was stirred for a few hours at room temperature and kept at 0° overnight. It was then added dropwise to a solution of ethyl 2-hydroxybut-3-enoate, and potassium hydrogen carbonate (4.6 g) in dimethoxyethane (7.5 ml). The mixture was stirred at room temperature overnight, partitioned between dichloromethane and water and the organic phase worked up to give ethyl acetate. The extract was dried and evaporated and the residue worked up to give ethyl 2-(3-bromo-4,5- dihydroisoxazol-5-yl)-2-hydroxyacetate.
Lithium hydroxide monohydrate (0.25 g) was added to a solution of this (0.5 g) in tetrahydrofuran ( 1 ml) and water (3 ml) at 0°. The mixture was stirred for 1 !_ hours at room temperature, acidified with hydrochloric acid and extracted with ethyl acetate. The extract was washed with brine, dried and evaporated to give the title product, which solidified on standing.
Example 7
Lawesson's reagent (2,4-bis(4-methoxyphenyl)-l ,2,3,4-dithiadiphosphetane
2,4-disulphide; 2.6 g) was added to a solution of N-[2-(4-ethoxy-3-methoxy- phenyl)ethyl]-0-trimethylsilyl-3,4-dichloromandelamide (5.4 g) in dry tetrahydrofuran (100 ml). The mixture was heated under reflux for 1 hour, evaporated and the residue purified by silica gel column chromatography to give
N-[2-(4-ethoxy-3-methoxyphenyl)ethyl]-0-trimethylsilyl-
3,4-dichloromandelothioamide, as an oil (compound 7);
Preparation of the starting material
A solution of trimethylsilyl chloride (1 .6 ml) in tetrahydrofuran (20 ml) was added to a stirred solution of N-[2-(4-ethoxy-3-methoxyphenyl)ethyl]-3,4-dichloro- mandelamide (5 g) and triethylamine (18 ml) in tetrahydrofuran (80 ml). The mixture was stirred at room temperature overnight and the tetrahydrofuran evaporated. Water was added and the mixture extracted with ethyl acetate. The extract was washed with water and brine, dried and evaporated to give N-[2-(4-ethoxy-3-methoxy-phenyl)ethyl]-0-trimethylsilyl-3,4-dichloromandelamide, as an oil, which was used without further purification.
Example 8
A solution of methyl 2-(3,4-dichlorophenyl)-2-hydroxyacetate (7.0 g) and methylhydrazine (7.0 ml) in ether (50 ml) was stirred at room temperature for 5 hours. The product was filtered, washed with ether and dried to give N'-methyl- 3,4-dichloromandelohydrazide, m.p. 169-70°. (compound 8)
In a similar manner there was also obtained a) N'-methyl-4-chloromandelohydrazide, m.p. 161 -4° (compound 8a), and b) N'-methyl-4-(trifluoromethyl)mandelohydrazide, m.p. 1 57-9°, (compound 8b), and c) 4-chloromandelohydrazide, m.p. 184-6° (compound 8c).
Example 9
A solution of compound 8 from Example 8 (1 .33 g), 3,4-dimethoxybenzyl chloride
( 1 .0 g) and N,N-diisopropylethylamine (0.75 g) in acetonitrile (50 ml) was heated
under reflux for 8 hours. Solvent was removed under reduced pressure and the residual gum taken up in ethyl acetate. The solution was washed with water, dried over magnesium sulfate, and concentrated to a gum which was purified by silica gel chromatography using ethyl acetate/methanol (20: 1 ), to give N'-(3,4-dimethoxybenzyl)-N'-methyl-3,4-dichloromandelohydrazide as a thick colourless gum. (compound 9)
The following tables illustrates further compounds of the invention which are obtained by the methods previously described.
A mixture of 5-(4-chlorophenyl)-2,2-dimethyl-1 ,3-dioxolan-4-one (2.26 g) and
0-(2-nitrobenzyl)hydroxylamine (1 .7 g) was heated under reflux for 24 hours. It was cooled and evaporated and the residue purified by silica gel column chromatography (eluent: ethyl acetate/hexane; 1 :3) to give 4-chloro-N-(2-nitrobenzyloxy)- mandelamide. m.p. 93-4°. (compound 10a)
Example 1 1
A mixture comprising a solution of mandelic acid (3 g) in dichloromethane (40 ml), a catalytic amount of 4-(dimethylamino)pyridine, pyridine (3.24 g) and trimethylsilyl chloride (4.5 g) was stirred at room temperature for 3 hours.
The mixture was cooled to 0°, and 10 drops of dimethylf ormamide added, followed by oxalyl chloride (2.58 g). The mixture was stirred for 1 hour at this temperature and allowed to warm to room temperature. It was stirred for 1 5 minutes and cooled to 0°. A solution of O-benzylhydroxylamine hydrochloride (3.46 g) in pyridine (3.24 g) and dichloromethane (30 ml) was added and the mixture was stirred overnight at room temperature. Citric acid (4.14 g) in methanol (30 ml) was added and the mixture was stirred for 30 minutes, diluted with ethyl acetate (100 ml) washed with dilute hydrochloric acid and water, dried and evaporated and the residue worked up to give N-benzyloxymandelamide. m.p. 101 -3°. (compound 1 1 a)
Example 12
To a solution of compound 4.1 (1 .5 g) in dichloromethane (50 ml) at room temperature, there was added triethylamine (0.89 ml) followed by acetyl chloride
(0.46 ml). The mixture was stirred for 1 hour at room temperature, washed with water, dried and evaporated and the residue purified by silica gel column chromatography to give residue worked up to give O-acetyl-
N-benzyloxymandelamide. m.p. 1 21 -3°. (compound 12a)
Example 13 To a solution of 4-chloromandelic acid (3.0 g) in 1 ,2-dimethoxyethane (35 ml) at room temperature, there was added N-hydroxysuccinimide (1 .85 g) followed by dicyclohexylcarbodiimide (3.32 g). The mixture was stirred for 45 minutes at room temperature. To this was added a solution of O-benzylhydroxylamine hydrochloride (2.81 g) and N,N-diisopropyl-ethylamine (3.1 ml) in 1 ,2-dimethoxyethane (30 ml), which had been prestirred for 1 V. hours and filtered. The mixture was stirred overnight at room temperature, filtered, the filtrate evaporated and the residue purified by silica gel column chromatography to give N-benzyloxy-4- chloromandelamide. m.p. 132-4°. (compound 13a)
Example 14
In a similar manner to the appropriate method described in Examples 3-6, the following compounds were obtained.
14.1 4-CI H 3,4-(MeO)2-Ph 105-7
14.2 3,4-CI2 H 4-EtO,3-MeO-Ph oil
14.3 4-CF3 H 4-EtO,3-MeO-Ph 86-8
14.4 4-CI COMe 3,4-(MeO)2-Ph oil
14.5 3,4-CI2 COMe 4-EtO,3-MeO-Ph oil
14.6 4-CF3 COCH2CI 4-EtO,3-MeO-Ph oil
14.7 4-CI COMe Ph oil
Test Example
Compounds are assessed for activity against one or more of the following:
Phytophthora iπfestans: late tomato blight
Plasmopara viticola: vine downy mildew Pyricularia oryzae: rice blast
Botrytis cinerea: grey mould
Ventυria inaequalis: apple scab
Leptosphaeria nodorum: glume blotch Aqueous solutions or dispersions of the compounds at the desired concentration, including a wetting agent, were applied by spray or by drenching the stem base of the test plants, as appropriate. Plants or plant parts were then inoculated with appropriate test pathogens and kept under controlled environment conditions suitable for maintaining plant growth and development of the disease. After an appropriate time, the degree of infection of the affected part of the plant was visually estimated. Compounds were considered active if they gave greater than 50% control of the disease at a concentration of 500 ppm (w/v) or less.
Compounds 7, 8c, 10, 13, 17, 18, 23, 25, 27, 38, 40, 57, 75-78, 89, 90, 93-
99, 101 , 104, 106-1 1 , 1 13. 1 1 5, 1 1 9-21 , 1 23, 1 26, 1 27, 1 36, 138, 139, 10a, 14.1 and 14.2 showed activity against Phytophthora infestans;
Compounds 3, 4, 6a-d, 7, 8a, 8c, 9. 1 1 -14, 17-20, 22-27, 31 , 32, 34-37, 43,
46, 48, 50, 52, 57, 58, 69, 71 , 75-77, 79, 82, 84-87, 89, 90, 92, 94-99,
102-10, 1 1 2, 1 13, 1 1 5-7, 1 19, 1 21 -4, 1 26-8, 131 , 1 37-9, 10a, 1 2a, 14.1 , 14.2 and 14.3 showed activity against Plasmopara viticola; Compounds 6b, 13, 14, 90 and 130 showed activity against Pyricularia oryzae
Compounds 19, 29, 50 and 56 showed activity Botrytis cinerea;
Compounds 6a, 6b, 6d, 27, 90, 103 and 124 showed activity against Venturia inaequalis, and
Compounds 8c, 41 and 104 showed activity against Leptosphaeria nodorum.
Claims
The use for combating phytopathogenic fungi, of a compound of formula I
Z
w
wherein
Q is optionally substituted heterocyclyl;
Z is optionally substituted hydroxy or mercapto;
E is (i) CO~N(R2), (ii) CS-N(R2) or (iii) C(SR2) = N
W is O, N(R3), optionally substituted methylene or ethylene; R1, R2 and R3 are phenyl or alkyl, each of which is optionally substituted, or hydrogen;
Y is phenyl, heteroaryl or alkyl, each of which is optionally substituted, or hydrogen; and when W is O or N(R3), and/or E is (ii) or (iii), Y is also optionally substituted phenyl, together with salts and complexes with metal salts.
2 Compounds of general formula I as defined in claim 1 with the exception that when E is defined as in (i), W is NH, R1 is H and Y is hydrogen, then Q is substituted.
3. Fungicidal compositions which comprise a compound as defined in claim 1 or 2 in admixture with an agriculturally acceptable diluent or carrier.
4. A method of combating phytopathogenic fungi at a locus infested or liable to be infested therewith, which comprises applying to the locus a compound as defined in claim 1 or 2.
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GBGB9425971.0A GB9425971D0 (en) | 1994-12-22 | 1994-12-22 | Heterocyclic arylacetamides |
GB9425971.0 | 1994-12-22 | ||
GB9502865.0 | 1995-02-14 | ||
GBGB9502865.0A GB9502865D0 (en) | 1995-02-14 | 1995-02-14 | Fungicidal compounds |
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Cited By (13)
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WO1999032464A1 (en) * | 1997-12-22 | 1999-07-01 | Novartis Ag | Thiazole-, isothiazole- and thiadiazole-derivatives having microbicidal and plant immunizing activities |
WO2001011965A1 (en) * | 1999-08-18 | 2001-02-22 | Aventis Cropscience Gmbh | Fungicides |
WO2002081437A2 (en) * | 2001-04-03 | 2002-10-17 | Syngenta Participations Ag | Novel n-p-propargyloxyphenethyl-thioacetic acid amides |
WO2003041728A1 (en) * | 2001-11-16 | 2003-05-22 | Syngenta Participations Ag | Novel phenyl-propargylether derivatives |
WO2003042167A1 (en) * | 2001-11-16 | 2003-05-22 | Syngenta Participations Ag | NOVEL α-OXYGENATED OR α-THIOLATED CARBOXYLIC ACID PENETHYLAMIDE DERIVATIVES |
WO2003042168A1 (en) * | 2001-11-16 | 2003-05-22 | Syngenta Participations Ag | NOVEL α-OXYGENATED OR α-THIOLATED CARBOXYLIC ACID PHENETHYLAMIDE DERIVATIVES |
WO2003082822A1 (en) * | 2002-03-28 | 2003-10-09 | Basf Aktiengesellschaft | Phenethylacrylamide, methods for the production thereof and agents containing the same |
WO2004011417A1 (en) * | 2002-07-24 | 2004-02-05 | Syngenta Participations Ag | N-bisaryl- and n-aryl-cycloalkylidenyl-alpha-hydroxy-and alpha-alkoxy acid amides |
WO2004016088A2 (en) * | 2002-08-12 | 2004-02-26 | Bayer Cropscience S.A. | Novel 2-pyridylethylbenzamide derivative |
WO2004033413A2 (en) * | 2002-10-10 | 2004-04-22 | Syngenta Participations Ag | Propargylether derivatives, a process for their preparation and their use for controlling phytopathogenic microorganisms |
JP2009526787A (en) * | 2006-02-14 | 2009-07-23 | メルク パテント ゲゼルシャフト ミット ベシュレンクテル ハフツング | Mandelic acid hydrazide |
WO2009103484A1 (en) * | 2008-02-18 | 2009-08-27 | Merck Patent Gmbh | Sgk1 inhibitors for the prophylaxis and/or therapy of viral diseases and/or carcinomas |
JP2010530393A (en) * | 2007-06-18 | 2010-09-09 | シンジェンタ パーティシペーションズ アクチェンゲゼルシャフト | Substituted aromatic heterocyclic compounds as fungicides |
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