Patent Application
20160016944
The present invention relates to 3-{phenyl[(heterocyclylmethoxy)imino]methyl}-heterocyclyl derivatives, their process of preparation, their use as fungicide active agents, particularly in the form of fungicide compositions, and methods for the control of phytopathogenic fungi, notably of plants, using these compounds or compositions.
In European patent application n°1184382, there are disclosed certain heterocyclyloxime derivatives of the following chemical structure:
that are excluded from the scope of the present invention.
In world patent application WO2009/130193, there are disclosed certain hydroximoyl-heterocycles derivatives of the following chemical structure:
Q is a phenyl ring, L1 a methylene linker and A an heterocycle. Said compounds are not part of the scope of the present invention.
It is always of high-interest in agriculture to use novel pesticide compounds in order to avoid or to control the development of resistant strains to the active ingredients. It is also of high-interest to use novel compounds being more active than those already known, with the aim of decreasing the amounts of active compound to be used, whilst at the same time maintaining effectiveness at least equivalent to the already known compounds. We have now found a new family of compounds which possess the above mentioned effects or advantages.
Accordingly, the present invention provides 3-{phenyl[(heterocyclylmethoxy)imino]methyl}-heterocycle derivatives of formula (I)
wherein
wherein
Z1 represents a hydrogen atom, a halogen atom, a nitro group, an amino group, an hydroxyamino group, a carboxylic acid, a hydroxy group, a cyano group, a sulfenyl group, a formyl group, a substituted or non-substituted carbaldehyde O—(C1-C8-alkyl)oxime, a formyloxy group, a carbamoyl group, a N-hydroxycarbamoyl group, sulfenylthioylamino, a pentafluoro-λ6-sulfenyl group, substituted or non-substituted C1-C8-alkoxyamino group, substituted or non-substituted N—C1-C8-alkyl-(C1-C8-alkoxy)-amino group, substituted or non-substituted (C1-C3-alkylamino)-amino group, substituted or non-substituted N—C1-C8-alkyl-(C1-C8-alkylamino)-amino group, a substituted or non-substituted (hydroxyimino)-C1-C6-alkyl group, substituted or non-substituted C1-C8-alkyl, substituted or non-substituted C3-C8-cycloalkyl, substituted or non-substituted C2-C8-alkenyl, substituted or non-substituted C2-C8-alkynyl, substituted or non-substituted aryl-C2-C8-alkynyl, substituted or non-substituted C3-C8-cycloalkyl-C2-C8-alkynyl, substituted or non-substituted C1-C8-alkoxy, substituted or non-substituted C2-C8-alkenyloxy, substituted or non-substituted C3-C8-alkynyloxy, substituted or non-substituted C1-C8-alkylcarbonyl, substituted or non-substituted N—(C1-C8-alkoxy)-C1-C8-alkanimidoyl, substituted or non-substituted N—C1-C8-alkyl-carbamoyl, substituted or non-substituted N,N′-di-C1-C8-alkyl-carbamoyl, substituted or non-substituted N—C1-C8-alkyloxycarbamoyl, substituted or non-substituted C1-C8-alkoxycarbamoyl, substituted or non-substituted N—C1-C8-alkyl-C1-C8-alkoxycarbamoyl, substituted or non-substituted C1-C8-alkoxycarbonyl, substituted or non-substituted C1-C8-alkylcarbonyloxy, substituted or non-substituted N—C1-C8-alkylaminocarbonyloxy, substituted or non-substituted N,N′-di-C1-C8-alkylaminocarbonyloxy, substituted or non-substituted N—C1-C8-alkylcarbamothioyl, substituted or non-substituted N,N′-di-C1-C8-alkylcarbamothioyl, substituted or non-substituted N—C1-C8-alkyloxycarbamothioyl, substituted or non-substituted C1-C8-alkoxycarbamothioyl, substituted or non-substituted N—C1-C8-alkyl-C1-C8-alkoxycarbamothioyl, substituted or non-substituted (C1-C8-alkyl-carbamothioyl)-oxy, substituted or non-substituted substituted or non-substituted (di-C1-C8-alkyl-carbamothioyl)-oxy, substituted or non-substituted C1-C8-alkylsulfenyl, substituted or non-substituted C1-C3-halogenoalkylsulfenyl having 1 to 5 halogen atoms, substituted or non-substituted C1-C8-alkylsulfinyl, substituted or non-substituted C1-C8-alkylsulfonyl, substituted or non-substituted C1-C8-alkylaminosulfamoyl, substituted or non-substituted (C1-C6-alkoxyimino)-C1-C6-alkyl, substituted or non-substituted (C1-C6-alkenyloxyimino)-C1-C6-alkyl, substituted or non-substituted (C1-C6-alkynyloxyimino)-C1-C6-alkyl, substituted or non-substituted (benzyloxyimino)-C1-C6-alkyl, substituted or non-substituted phenoxy, substituted or non-substituted phenylsulfenyl, substituted or non-substituted aryl, substituted or non-substituted tri(C1-C8-alkyl)-silyloxy, substituted or non-substituted C1-C8-alkylsulfenylamino, substituted or non-substituted C1-C8-alkylsulfonylamino, substituted or non-substituted C1-C8-alkoxysulfonylamino, substituted or non-substituted tri(C1-C8-alkyl)-silyl, substituted or non-substituted (C1-C6-alkylideneamino)oxy, substituted or non-substituted (C1-C6-alkenylideneamino)oxy, substituted or non-substituted (C1-C6-alkynylideneamino)oxy, substituted or non-substituted (benzylideneamino)oxy, substituted or non-substituted (N-hydroxy-C1-C6-alkanimidoyl)amino, substituted or non-substituted (N—C1-C6-alkoxy-C1-C6-alkanimidoyl)amino, substituted or non-substituted C1-C8-alkylamino, substituted or non-substituted C3-C10-cycloalkylamino, substituted or non-substituted C3-C10-cycloalkenylamino, substituted or non-substituted C5-C12-fused bicycloalkylamino, substituted or non-substituted C5-C12-fused bicycloalkenylamino, substituted or non-substituted di-C1-C8-alkylamino, substituted or non-substituted phenylamino, substituted or non-substituted heterocyclylamino, substituted or non-substituted C3-C10-cycloalkyl-C1-C8-alkylamino, substituted or non-substituted aryl-C1-C8-alkylamino, substituted or non-substituted C1-C8-alkoxy-C1-C8-alkylamino, or a group of formula QC(═U)NRa—
Any of the compounds according to the invention can exist as one or more stereoisomers depending on the number of stereogenic units (as defined by the IUPAC rules) in the compound. The invention thus relates equally to all the stereoisomers, and to the mixtures of all the possible stereoisomers, in all proportions. The stereoisomers can be separated according to the methods which are known per se by the man ordinary skilled in the art.
Notably, the stereostructure of the oxime moiety present in the 4-substituted-3-{phenyl[(heterocyclylmethoxy)imino]methyl}-1,2,4-oxadiazol-5(4H)-one derivative of formula (I) includes (E) or (Z) isomer, and these stereoisomers form part of the present invention.
According to the invention, the following generic terms are generally used with the following meanings:
Preferred compounds of formula (I) according to the invention are those wherein X1 represents a hydrogen atom, substituted or non-substituted C1-C8-alkyl, substituted or non-substituted C3-C8-cycloalkyl or a substituted or non-substituted C2-C8-alkenyl.
More preferred compounds of formula (I) according to the invention are those wherein X1 represents a hydrogen atom, a methyl group, an ethyl group, a n-propyl group, an isopropyl group or a cyclopropyl group.
Even more preferred compounds of formula (I) according to the invention are those wherein X1 represents a hydrogen atom or a methyl group.
Preferred compounds of formula (I) according to the invention are those wherein X2 and X3 independently represent O, S, C═O, C═S, or C═NR.
More preferred compounds of formula (I) according to the invention are those wherein X2 and X3 independently represent an O or C═S.
When X2 represents O, other preferred compounds of formula (I) according to the invention are those wherein X3 represents C═S.
When X3 represents O, other preferred compounds of formula (I) according to the invention are those wherein X2 represents C═S.
When X2 or/and X3 represents independently C═NR or S(═O)(═NR), other preferred compounds of formula (I) according to the invention are those wherein R represents a cyano group or substituted or unsubstituted C1-C8-alkyl.
When X2 or/and X3 represents independently C═NR or S(═O)(═NR), more preferred compounds of formula (I) according to the invention are those wherein R represents a cyano group.
Other preferred compounds of formula (I) according to the invention are those wherein A is selected in the list consisting of A1 to A15.
More preferred compounds of formula (I) according to the invention are those wherein A is selected in the list consisting of A1, A3, A4, A11, A13 and A14.
Even more preferred compounds of formula (I) according to the invention are those wherein A is selected in the list consisting of A1, A11, A13 and A14.
Other preferred compounds of formula (I) according to the invention are those wherein Z1 represents a hydrogen atom, a halogen atom, a nitro group, an amino group, an hydroxyamino group, a substituted or non-substituted carbaldehyde O—(C1-C8-alkyl)oxime, substituted or non-substituted C1-C8-alkoxyamino group, a substituted or non-substituted (hydroxyimino)-C1-C6-alkyl group, substituted or non-substituted C2-C8-alkenyl, substituted or non-substituted C2-C8-alkynyl, substituted or non-substituted (C1-C6-alkoxyimino)-C1-C6-alkyl, substituted or non-substituted (C1-C6-alkenyloxyimino)-C1-C6-alkyl, substituted or non-substituted (C1-C6-alkynyloxyimino)-C1-C6-alkyl, substituted or non-substituted (benzyloxyimino)-C1-C6-alkyl, substituted or non-substituted (N-hydroxy-C1-C6-alkanimidoyl)amino, substituted or non-substituted (N—C1-C6-alkoxy-C1-C6-alkanimidoyl)amino, substituted or non-substituted C1-C3-alkylamino, substituted or non-substituted C3-C10-cycloalkylamino, substituted or non-substituted C3-C10-cycloalkenylamino, substituted or non-substituted C5-C12-fused bicycloalkylamino, substituted or non-substituted C5-C12-fused bicycloalkenylamino, substituted or non-substituted di-C1-C8-alkylamino, substituted or non-substituted phenylamino, substituted or non-substituted heterocyclylamino, or a group of formula QC(═U)NRa—
More preferred compounds of formula (I) according to the invention are those wherein Z1 represents a hydrogen atom, a halogen atom, a nitro group, an amino group, substituted or non-substituted C1-C8-alkoxyamino group, substituted or non-substituted C2-C8-alkenyl, substituted or non-substituted C2-C8-alkynyl, substituted or non-substituted (C1-C6-alkoxyimino)-C1-C6-alkyl, substituted or non-substituted (C1-C6-alkenyloxyimino)-C1-C6-alkyl, substituted or non-substituted (C1-C6-alkynyloxyimino)-C1-C6-alkyl, substituted or non-substituted (benzyloxyimino)-C1-C6-alkyl, substituted or non-substituted (N—C1-C6-alkoxy-C1-C6-alkanimidoyl)amino, substituted or non-substituted C1-C8-alkylamino, substituted or non-substituted C3-C10-cycloalkylamino, or a group of formula QC(═U)NRa—
Even more preferred compounds of formula (I) according to the invention are those wherein Z1 represents a halogen atom, a nitro group, an amino group, substituted or non-substituted C2-C8-alkynyl, substituted or non-substituted (N—C1-C6-alkoxy-C1-C6-alkanimidoyl)amino, or a group of formula QC(═U)NRa.
When Z1 represents a group of formula QC(═U)NRa, other preferred compounds of formula (I) according to the invention are those wherein U represents an oxygen atom.
When Z1 represents a group of formula QC(═U)NRa, other preferred compounds of formula (I) according to the invention are those wherein Ra represents a hydrogen atom, a hydroxy group, substituted or non-substituted C1-C8-alkyl, substituted or non-substituted C3-C8-cycloalkyl, substituted or non-substituted C1-C8-alkoxy.
When Z1 represents a group of formula QC(═U)NRa, more preferred compounds of formula (I) according to the invention are those wherein Ra represents a hydrogen atom.
When Z1 represents a group of formula QC(═U)NRa, other preferred compounds of formula (I) according to the invention are those wherein Q represents a substituted or non-substituted C1-C8-alkyl, substituted or non-substituted C3-C8-cycloalkyl, substituted or non-substituted C3-C8-cycloalkoxy, substituted or non-substituted C2-C8-alkynyl, substituted or non-substituted C2-C3-alkenyl, substituted or non-substituted C1-C8-alkoxy, substituted or non-substituted C2-C8-alkenyloxy, substituted or non-substituted C2-C8-alkynyloxy, substituted or non-substituted C1-C8-alkylsulfenyl, substituted or non-substituted aryl, substituted or non-substituted heterocyclyl, substituted or non-substituted C3-C8-cycloalkyl-C1-C8-alkyl, substituted or non-substituted C3-C8-cycloalkyl-C1-C8-alkoxy, substituted or non-substituted C3-C8-cycloalkoxy-C1-C8-alkyl, substituted or non-substituted heterocyclyl-C1-C3-alkyl, substituted or non-substituted aryl-C1-C8-alkyl, substituted or non-substituted aryl-C1-C8-alkoxy, substituted or non-substituted aryloxy-C1-C8-alkyl, substituted or non-substituted C1-C8-alkoxy-C1-C8-alkyl.
When Z1 represents a group of formula QC(═U)NRa, more preferred compounds of formula (I) according to the invention are those wherein Q represents a substituted or non-substituted C4-C8-alkyl, substituted or non-substituted C3-C8-cycloalkyl, substituted or non-substituted C4-C8-alkynyl, substituted or non-substituted C4-C8-alkoxy, substituted or non-substituted C4-C3-alkenyloxy, substituted or non-substituted C4-C8-alkynyloxy, substituted or non-substituted C3-C8-alkylsulfenyl, substituted or non-substituted aryl, substituted or non-substituted heterocyclyl.
When Z1 represents a group of formula QC(═U)NRa, even more preferred compounds of formula (I) according to the invention are those wherein Q represents a substituted or non-substituted C4-C8-alkyl, substituted or non-substituted C4-C8-alkynyl, substituted or non-substituted C4-C8-alkoxy, substituted or non-substituted C4-C8-alkenyloxy, substituted or non-substituted C4-C8-alkynyloxy, substituted or non-substituted aryl, substituted or non-substituted heterocyclyl.
When Z1 represents a group of formula QC(═U)NRa, and when Q represents a substituted or non-substituted C4-C8-alkyl, substituted or non-substituted C3-C8-cycloalkyl, substituted or non-substituted C4-C8-alkynyl, substituted or non-substituted C4-C8-alkoxy, substituted or non-substituted C4-C8-alkenyloxy, substituted or non-substituted C4-C8-alkynyloxy, substituted or non-substituted C3-C8-alkylsulfenyl, substituted or non-substituted aryl, substituted or non-substituted heterocyclyl, other preferred compounds of formula (I) according to the invention are those wherein substituents for Q are chosen in the list of a halogen atom, a cyano group, a (hydroxyimino)-C1-C6-alkyl group, a C1-C8-alkyl, C3-C8-cycloalkyl, a C2-C8-alkenyl, a C2-C8-alkynyl, a C2-C8-alkenyloxy, a C2-C8-alkynyloxy, a C1-C8-alkoxy, a C1-C8-alkylsulfenyl, a (C1-C6-alkoxyimino)-C1-C6-alkyl, a (C1-C6-alkenyloxyimino)-C1-C6-alkyl, a (C1-C6-alkynyloxyimino)-C1-C6-alkyl, (benzyloxyimino)-C1-C6-alkyl, C1-C8-alkoxyalkyl, benzyloxy, benzylsulfenyl, phenoxy, phenylsulfenyl, an aryl group or an heterocyclyl group, or wherein substituents form together a substituted or non-substituted, saturated or partially saturated 3-, 4-, 5-, 6-, 7-, 8-, 9-, 10-, or 11-membered cycle, which can be a carbocycle or a heterocycle comprising up to 4 heteroatoms selected from the list consisting of N, O, and S.
When Z1 represents a group of formula QC(═U)NRa, and when Q represents a substituted or non-substituted C4-C8-alkyl, substituted or non-substituted C3-C8-cycloalkyl, substituted or non-substituted C4-C8-alkynyl, substituted or non-substituted C4-C8-alkoxy, substituted or non-substituted C4-C8-alkenyloxy, substituted or non-substituted C4-C8-alkynyloxy, substituted or non-substituted C3-C8-alkylsulfenyl, substituted or non-substituted aryl, substituted or non-substituted heterocyclyl, more preferred compounds of formula (I) according to the invention are those wherein substituents for Q are chosen in the list of a halogen atom, a cyano group, a (hydroxyimino)-C1-C6-alkyl group, a C1-C8-alkyl, C3-C8-cycloalkyl, a C2-C8-alkenyl, a C2-C8-alkynyl, a C2-C8-alkenyloxy, a C2-C8-alkynyloxy, a C1-C8-alkoxy, a C1-C8-alkylsulfenyl, (benzyloxyimino)-C1-C6-alkyl, C1-C8-alkoxyalkyl, benzyloxy, phenoxy, an aryl group or an heterocyclyl group or wherein substituents form together a saturated or partially saturated 3-, 4-, 5-, 6-membered cycle, which can be a carbocycle or a heterocycle comprising up to 4 heteroatoms selected from the list consisting of N, O, and S.
Other preferred compounds of formula (I) according to the invention are those wherein Z2, Z3 and Z4 independently represent a hydrogen atom, a halogen atom, substituted or non-substituted C1-C8-alkyl.
More preferred compounds of formula (I) according to the invention are those wherein Z2, Z3 and Z4 independently represent a hydrogen atom.
Other preferred compounds of formula (I) according to the invention are those wherein K1 represents a hydrogen atom, substituted or non-substituted C1-C8-alkyl.
More preferred compounds of formula (I) according to the invention are those wherein K1 represents a methyl group.
Other preferred compounds of formula (I) according to the invention are those wherein Y1 to Y5 independently represent a hydrogen atom, a halogen atom, substituted or non-substituted C1-C8-alkyl, substituted or non-substituted C3-C8-cycloalkyl, substituted or non-substituted C1-C8-halogenoalkyl having 1 to 5 halogen atoms, or substituted or non-substituted C1-C8-alkoxy.
More preferred compounds of formula (I) according to the invention are those wherein Y1 to Y5 independently represent a hydrogen atom, a halogen atom, methyl, ethyl, isopropyl, isobutyl, tertbutyl, trifluoromethyl, difluoromethyl, allyl, ethynyl, propargyl, cyclopropyl, methoxy or trifluoromethoxy.
Even more preferred compounds of formula (I) according to the invention are those wherein Y1 to Y5 independently represent a hydrogen atom or fluorine atom.
The above mentioned preferences with regard to the substituents of the compounds of formula (I) according to the invention can be combined in various manners. These combinations of preferred features thus provide sub-classes of compounds according to the invention. Examples of such sub-classes of preferred compounds according to the invention can combine:
In these combinations of preferred features of the substituents of the compounds according to the invention, the said preferred features can also be selected among the more preferred features of each of A, X1 to X3, and Y1 to Y5; so as to form most preferred subclasses of compounds according to the invention.
The present invention also relates to a process for the preparation of compounds of formula (I),
Thus, according to a further aspect of the present invention, there is a provided a process P1 for the preparation of compounds of formula (Ia) from compounds of formula (II), by a reaction of nucleophilic substitution on compounds of formula (III) to yield to a compound of formula (IV), according to known methods, optionally in the presence of a base, according to known methods; followed by the addition of hydroxylamine or an hydroxylamine salt on compounds of formula (IV) to yield to a compound of formula (V), optionally in the presence of a base, optionally in the presence of an acid, according to known methods; followed by a reaction of cyclization of compounds of formula (V) to yield to a compound of formula (Ia), with a phosgene equivalent, optionally in the presence of a base, according to known methods; followed by a reaction of alkylation of compounds of formula (Ib) to yield to a compound of formula (Ia), with an alkylating agent of formula X1-LGa, optionally in the presence of a base, according to known methods.
In such a case there is provided a process P1 according to the invention and such a process P1 can be illustrated by the following reaction scheme:
wherein Y1, Y2, Y3, Y4, Y5, A, X1 and X2 are as herein-defined and LG, LGa, LGb and LGc independently represent a leaving group. Suitable leaving groups can be selected in the list consisting of a halogen atom or other customary nucleofugal groups such as triflate, mesylate, or tosylate. Hydroxylamine or an hydroxylamine salt are commercially available.
Compounds of formula (II) and (III) are commercially available or are easily accessible to the skilled worker in the art. Examples of preparation can be found in world patent application WO2009/130193. Compounds of formula X1-LGa are commercially available. Compounds of formula LGb-X2-LGc are commercially available.
In such a case there is provided a further process P2 according to the invention and such a process P2 can be illustrated by the following reaction scheme:
wherein Y1, Y2, Y3, Y4, Y5, X1, X2 and A are as herein-defined.
Hydroxylamine derivatives or an hydroxylamine derivative salts are commercially available or are easily accessible to the skilled worker in the art. Compounds of formula LGb-X2-LGc are commercially available.
According to the invention, there is provided a further process P3 for the preparation of compounds of formula (Ie) from compounds of formula (Id).
For the compounds of formula (Id) according to the invention if Z1 represents represent —NHRa, process P1 or P2 according to the invention can be completed by a further step comprising the additional modification of this group, notably by a reaction of acylation, alkoxycarbonylation, alkylaminocarbonylation, (thio)acylation, alkoxy(thio)carbonylation, alkylsuphenyl(thio)carbonylation or alkylamino(thio)carbonylation to yield to a compound of formula (Ie), according to known methods. In such a case there is provided a process P3 according to the invention and such a process P3 can be illustrated by the following reaction scheme:
Y1, Y2, Y3, Y4, Y5, X1, X2, X3, Ra and Q are as herein-defined and Ab represents A wherein Z1 represents—NHRa; Ac represents A wherein Z1 represents a group of formula QC(═U)NRa and LG′ represents a leaving group.
Suitable leaving groups can be selected in the list consisting of a halogen atom or other customary nucleofugal groups such as alcoolate, hydroxide or cyanide.
According to the invention, there is provided a further process P4 for the preparation of compounds of formula (Ig) from compounds of formula (If), by a reaction of nucleophilic substitution to yield to a compound of formula (Ig), according to known methods, optionally in the presence of a catalyst notably a transition metal catalyst, such as palladium salts or complexes for example palladium (II) chloride, palladium (II) acetate, tetrakis-(triphenylphosphine) palladium(0), bis-(triphenylphosphine) palladium dichloride (II), tris(dibenzylideneacetone)dipalladium(0), bis(dibenzylideneacetone) palladium(0) or 1,1′-bis(diphenylphosphino)ferrocene-palladium (II) chloride. As an alternative the palladium complex is directly generated in the reaction mixture by separately adding to the reaction mixture a palladium salt and a complex ligand such as a phosphine, for example triethylphosphine, tri-tert-butylphosphine, tricyclohexylphosphine, 2-(dicyclohexylphosphine)biphenyl, 2-(di-tert-butylphosphin)biphenyl, 2-(dicyclohexylphosphine)-2′-(N,N-dimethylamino)-biphenyl, triphenylphosphine, tris-(o-tolyl)phosphine, sodium 3-(diphenylphosphino)benzolsulfonate, tris-2-(methoxyphenyl)phosphine, 2,2′-bis-(diphenylphosphine)-1,1′-binaphthyl, 1,4-bis-(diphenylphosphine)butane, 1,2-bis-(diphenylphosphine)ethane, 1,4-bis-(dicyclohexylphosphine)butane, 1,2-bis-(dicyclohexylphosphine)ethane, 2-(dicyclohexylphosphine)-2′-(N,N-dimethylamino)-biphenyl, bis(diphenylphosphino)ferrocene, tris-(2,4-tert-butylphenyl)-phosphite, (R)-(−)-1-[(S)-2-(diphenylphosphino)ferrocenyl]ethyldi-tert-butylphosphine, (S)-(+)-1-[(R)-2-(diphenylphosphino)ferrocenyl]ethyldicyclohexylphosphine, (R)-(−)-1-[(S)-2-(diphenylphosphino)ferrocenyl]ethyldicyclohexylphosphine, (S)-(+)-1-[(R)-2-(diphenylphosphino)ferrocenyl]ethyldi-t-butylphosphine, optionally in the presence of a base such as an inorganic or an organic base; preferably an alkaline earth metal or alkali metal hydride, hydroxide, amide, alcoholate, acetate, carbonate or hydrogen carbonate, such as sodium hydride, sodium amide, lithium diisopropylamide, sodium methanolate, sodium ethanolate, potassium tert-butanolate, sodium acetate, potassium acetate, calcium acetate, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, potassium bicarbonate, sodium bicarbonate, cesium carbonate or ammonium carbonate; and also tertiary amine, such as trimethylamine, triethylamine (TEA), tributylamine, N,N-dimethylaniline, N,N-dimethyl-benzylamine, N,N-diisopropyl-ethylamine (DIPEA), pyridine, N-methylpiperidine, N-methylmorpholine, N,N-dimethylaminopyridine, diazabicyclooctane (DABCO), diazabicyclononene (DBN) or diazabicycloundecene (DBU), according to known methods. In such a case there is provided a process P4 according to the invention and such a process P4 can be illustrated by the following reaction scheme:
wherein
According to the invention, there is provided a further process P5 for the preparation of compounds of formula (Ii) from compounds of formula (Ih).
For the compounds of formula (Ih) according to the invention, Af represents A wherein Z1 represents a group of formula QC(═O)NRa, process P1 or P2 according to the invention can be completed by a further step comprising the additional modification of this group, notably by a reaction of thiocarbonylation in the presence of a thiocarbonylating agent such as 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane 2,4-disulfide, phosphorus pentasulfide, sulfur to yield to a compound of formula (Ii), according to known methods. In such a case there is provided a process P5 according to the invention and such a process P5 can be illustrated by the following reaction scheme:
Compounds of formula (VII) are easily accessible to the skilled worker in the art. Examples of preparation can be found in Annali di Chimica (Rome, Italy), (1963), 53(10), 1405-10 Examples of condensations of compounds of formula (VIII) with compounds of formula (IX) can be found in world patent application WO2010/000841.
Compounds of formula (IX) are easily accessible to the skilled worker in the art. Examples of preparation can be found in world patent application WO2010/000841.
According to the invention, there is provided a further process P6 for the preparation of compounds of formula (Ii) from compounds of formula (Ih), by a reaction of alkylation, according to known methods. In such a case there is provided a process P6 according to the invention and such a process P6 can be illustrated by the following reaction scheme:
Suitable leaving groups can be selected in the list consisting of a halogen atom or other customary nucleofugal groups such as alcoolate, hydroxide or cyanide.
According to the invention, there is provided a further process P7 for the preparation of compounds of formula (Im) from compounds of formula (II), by a reaction of deprotection, according to known methods. In such a case there is provided a process P7 according to the invention and such a process P7 can be illustrated by the following reaction scheme:
Amino-protecting groups and related methods of cleavage thereof are known and can be found in T. W. Greene and P. G. M. Wuts, Protective Group in Organic Chemistry, 3rd ed., John Wiley & Sons.
According to the invention, there is provided a further process P8 for the preparation of compounds of formula (Io) from compounds of formula (In), by a reaction of amino-reduction, in the presence of a reducing agent, such as hydrogen gas or an hydride derivative, in particular sodium cyanoborohydride, according to known methods. In such a case there is provided a process P8 according to the invention and such a process P8 can be illustrated by the following reaction scheme:
According to the invention, there is provided a further process P9 for the preparation of compounds of formula (Iq) from compounds of formula (Ip) according to the following reaction scheme in either one or two steps.
According to the invention, processes P1 to P9 can be performed if appropriate in the presence of a solvent and if appropriate in the presence of a base.
According to the invention, process P3 can be performed if appropriate in the presence of a catalyst. Suitable catalyst can be chosen as being 4-dimethyl-aminopyridine, 1-hydroxy-benzotriazole or dimethylformamide.
In case LG′ represents a hydroxy group, the process P3 according to the present invention can be performed in the presence of condensing agent. Suitable condensing agent can be chosen as being acid halide former, such as phosgene, phosphorous tri-bro-mide, phosphorous trichloride, phosphorous pentachloride, phosphorous trichloride oxide or thionyl chloride; anhydride former, such as ethyl chloroformate, methyl chloroformate, isopropyl chloroformate, isobutyl chloroformate or methanesulfonyl chloride; carbodiimides, such as N,N′-dicyclohexylcarbodiimide (DCC) or other customary condensing agents, such as phosphorous pentoxide, polyphosphoric acid, N,N′-carbonyl-diimidazole, 2-ethoxy-N-ethoxycarbonyl-1,2-dihydroquinoline (EEDQ), triphenylphosphine/tetrachloromethane, 4-(4,6-dimethoxy[1.3.5]triazin-2-yl)-4-methylmorpholinium chloride hydrate or bromo-tripyrrolidino-phosphonium-hexafluorophosphate.
Suitable solvents for carrying out processes P1 to P9 according to the invention are customary inert organic solvents. Preference is given to using optionally halogenated aliphatic, alicyclic or aromatic hydrocarbons, such as petroleum ether, hexane, heptane, cyclohexane, methylcyclohexane, benzene, toluene, xylene or decalin; chlorobenzene, dichlorobenzene, dichloromethane, chloroform, carbon tetrachloride, dichlorethane or trichlorethane; ethers, such as diethyl ether, diisopropyl ether, methyl tert-butyl ether, methyl tert-amyl ether, dioxane, tetrahydrofuran, 1,2-dimethoxyethane, 1,2-diethoxyethane or anisole; nitriles, such as acetonitrile, propionitrile, n- or iso-butyronitrile or benzonitrile; amides, such as N,N-dimethylformamide, N,N-dimethylacetamide, N-methylformanilide, N-methylpyrrolidone or hexamethylphosphoric triamide; esters, such as methyl acetate or ethyl acetate, sulfoxides, such as dimethyl sulfoxide or sulfones, such as sulfolane.
Suitable bases for carrying out processes P1 to P9 according to the invention are inorganic and organic bases which are customary for such reactions. Preference is given to using alkaline earth metal, alkali metal hydride, alkali metal hydroxides or alkali metal alkoxides, such as sodium hydroxide, sodium hydride, calcium hydroxide, potassium hydroxide, potassium tert-butoxide or other ammonium hydroxide, alkali metal carbonates, such as sodium carbonate, potassium carbonate, potassium bicarbonate, sodium bicarbonate, cesium carbonate, alkali metal or alkaline earth metal acetates, such as sodium acetate, potassium acetate, calcium acetate and also tertiary amines, such as trimethylamine, triethylamine, diisopropylethylamine, tributylamine, N,N-dimethylaniline, pyridine, N-methylpiperidine, N,N-dimethylaminopyridine, 1,4-diazabicyclo[2.2.2]octane (DABCO), 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) or 1,8-diaza-bicyclo[5.4.0]undec-7-ene (DBU).
If carrying out processes P1 to P9, according to the invention, the reaction temperature can independently be varied within a relatively wide range. Generally, process P1 to P9 according to the invention is carried out at temperatures between −20° C. and 160° C.
Processes P1 to P9 according to the invention are generally independently carried out under atmospheric pressure. However, it is also possible to operate under elevated or reduced pressure.
Work-up is carried out by customary methods. Generally, the reaction mixture is treated with water and the organic phase is separated off and, after drying, concentrated under reduced pressure. If appropriate, the remaining residue can be freed by customary methods, such as chromatography or recrystallization, from any impurities that can still be present.
Compounds according to the invention can be prepared according to the above described processes. It will nevertheless be understood that, on the basis of his general knowledge and of available publications, the skilled worker will be able to adapt these processes according to the specifics of each of the compounds according to the invention that is desired to be synthesised.
In a further aspect, the present invention relates to compounds of formula (VIII) useful as intermediate compounds or materials for the process of preparation according to the invention. The present invention thus provides compounds of formula (VIII) wherein Y1, Y2, Y3, Y4, Y5, X1 and A are as herein-defined.
In a further aspect, the present invention also relates to a fungicide composition comprising an effective and non-phytotoxic amount of an active compound of formula (I).
The expression “effective and non-phytotoxic amount” means an amount of composition according to the invention which is sufficient to control or destroy the fungi present or liable to appear on the crops and which does not entail any appreciable symptom of phytotoxicity for the said crops. Such an amount can vary within a wide range depending on the fungus to be controlled, the type of crop, the climatic conditions and the compounds included in the fungicide composition according to the invention. This amount can be determined by systematic field trials, which are within the capabilities of a person skilled in the art.
Thus, according to the invention, there is provided a fungicide composition comprising, as an active ingredient, an effective amount of a compound of formula (I) as herein defined and an agriculturally acceptable support, carrier or filler.
According to the invention, the term “support” denotes a natural or synthetic organic or inorganic compound with which the active compound of formula (I) is combined or associated to make it easier to apply, notably to the parts of the plant. This support is thus generally inert and should be agriculturally acceptable. The support can be a solid or a liquid. Examples of suitable supports include clays, natural or synthetic silicates, silica, resins, waxes, solid fertilisers, water, alcohols, in particular butanol organic solvents, mineral and plant oils and derivatives thereof. Mixtures of such supports can also be used.
The composition according to the invention can also comprise additional components. In particular, the composition can further comprise a surfactant. The surfactant can be an emulsifier, a dispersing agent or a wetting agent of ionic or non-ionic type or a mixture of such surfactants. Mention can be made, for example, of polyacrylic acid salts, lignosulfonic acid salts, phenolsulfonic or naphthalenesulfonic acid salts, polycondensates of ethylene oxide with fatty alcohols or with fatty acids or with fatty amines, substituted phenols (in particular alkylphenols or arylphenols), salts of sulfosuccinic acid esters, taurine derivatives (in particular alkyl taurates), phosphoric esters of polyoxyethylated alcohols or phenols, fatty acid esters of polyols and derivatives of the above compounds containing sulfate, sulfonate and phosphate functions. The presence of at least one surfactant is generally essential if the active compound and/or the inert support are water-insoluble and if the vector agent for the application is water. Preferably, surfactant content can be comprised from 5% to 40% by weight of the composition.
Optionally, additional components can also be included, e.g. protective colloids, adhesives, thickeners, thixotropic agents, penetration agents, stabilisers, sequestering agents. More generally, the active compounds can be combined with any solid or liquid additive, which complies with the usual formulation techniques.
In general, the composition according to the invention can contain from 0.05 to 99% by weight of active compound, preferably 10 to 70% by weight.
Compositions according to the invention can be used in various forms such as aerosol dispenser, capsule suspension, cold fogging concentrate, dustable powder, emulsifiable concentrate, emulsion oil in water, emulsion water in oil, encapsulated granule, fine granule, flowable concentrate for seed treatment, gas (under pressure), gas generating product, granule, hot fogging concentrate, macrogranule, microgranule, oil dispersible powder, oil miscible flowable concentrate, oil miscible liquid, paste, plant rodlet, powder for dry seed treatment, seed coated with a pesticide, soluble concentrate, soluble powder, solution for seed treatment, suspension concentrate (flowable concentrate), ultra low volume (ULV) liquid, ultra low volume (ULV) suspension, water dispersible granules or tablets, water dispersible powder for slurry treatment, water soluble granules or tablets, water soluble powder for seed treatment and wettable powder. These compositions include not only compositions which are ready to be applied to the plant or seed to be treated by means of a suitable device, such as a spraying or dusting device, but also concentrated commercial compositions which must be diluted before application to the crop.
The compounds according to the invention can also be mixed with one or more insecticide, fungicide, bactericide, attractant, acaricide or pheromone active substance or other compounds with biological activity. The mixtures thus obtained have a broadened spectrum of activity. The mixtures with other fungicide compounds are particularly advantageous. The composition according to the invention comprising a mixture of a compound of formula (I) with a bactericide compound can also be particularly advantageous.
According to another object of the present invention, there is provided a method for controlling the phytopathogenic fungi of plants, crops or seeds, characterized in that an agronomically effective and substantially non-phytotoxic quantity of a pesticide composition according to the invention is applied as seed treatment, foliar application, stem application, drench or drip application (chemigation) to the seed, the plant or to the fruit of the plant or to soil or to inert substrate (e.g. inorganic substrates like sand, rockwool, glasswool; expanded minerals like perlite, vermiculite, zeolite or expanded clay), Pumice, Pyroclastic materials or stuff, synthetic organic substrates (e.g. polyurethane) organic substrates (e.g. peat, composts, tree waste products like coir, wood fibre or chips, tree bark) or to a liquid substrate (e.g. floating hydroponic systems, Nutrient Film Technique, Aeroponics) wherein the plant is growing or wherein it is desired to grow.
The expression “are applied to the plants to be treated” is understood to mean, for the purposes of the present invention, that the pesticide composition which is the subject of the invention can be applied by means of various methods of treatment such as:
The method according to the invention can either be a curing, preventing or eradicating method. In this method, a composition used can be prepared beforehand by mixing the two or more active compounds according to the invention.
According to an alternative of such a method, it is also possible to apply simultaneously, successively or separately compounds (A) and (B) so as to have the conjugated (A)/(B) effects, of distinct compositions each containing one of the two or three active ingredients (A) or (B).
The dose of active compound usually applied in the method of treatment according to the invention is generally and advantageously
The doses herein indicated are given as illustrative Examples of method according to the invention. A person skilled in the art will know how to adapt the application doses, notably according to the nature of the plant or crop to be treated.
Under specific conditions, for example according to the nature of the phytopathogenic fungus to be treated or controlled, a lower dose can offer adequate protection. Certain climatic conditions, resistance or other factors like the nature of the phytopathogenic fungi or the degree of infestation, for example, of the plants with these fungi, can require higher doses of combined active ingredients. The optimum dose usually depends on several factors, for example on the type of phytopathogenic fungus to be treated, on the type or level of development of the infested plant, on the density of vegetation or alternatively on the method of application.
Without it being limiting, the crop treated with the pesticide composition or combination according to the invention is, for example, grapevine, but this could be cereals, vegetables, lucerne, soybean, market garden crops, turf, wood, tree or horticultural plants.
The method of treatment according to the invention can also be useful to treat propagation material such as tubers or rhizomes, but also seeds, seedlings or seedlings pricking out and plants or plants pricking out. This method of treatment can also be useful to treat roots. The method of treatment according to the invention can also be useful to treat the over-ground parts of the plant such as trunks, stems or stalks, leaves, flowers and fruit of the concerned plant.
Among the plants that can be protected by the method according to the invention, mention can be made of cotton; flax; vine; fruit or vegetable crops such as Rosaceae sp. (for instance pip fruit such as apples and pears, but also stone fruit such as apricots, almonds and peaches), Ribesioidae sp., Juglandaceae sp., Betulaceae sp., Anacardiaceae sp., Fagaceae sp., Moraceae sp., Oleaceae sp., Actinidaceae sp., Lauraceae sp., Musaceae sp. (for instance banana trees and plantins), Rubiaceae sp., Theaceae sp., Sterculiceae sp., Rutaceae sp. (for instance lemons oranges and grapefruit); Solanaceae sp. (for instance tomatoes), Liliaceae sp., Asteraceae sp. (for instance lettuces), Umbelliferae sp., Cruciferae sp., Chenopodiaceae sp., Cucurbitaceae sp., Papilionaceae sp. (for instance peas), Rosaceae sp. (for instance strawberries); major crops such as Graminae sp. (for instance maize, lawn or cereals such as wheat, rice, barley and triticale), Asteraceae sp. (for instance sunflower), Cruciferae sp. (for instance colza), Fabacae sp. (for instance peanuts), Papilionaceae sp. (for instance soybean), Solanaceae sp. (for instance potatoes), Chenopodiaceae sp. (for instance beetroots); horticultural and forest crops; as well as genetically modified homologues of these crops.
The method of treatment according to the invention can be used in the treatment of genetically modified organisms (GMOs), e.g. plants or seeds. Genetically modified plants (or transgenic plants) are plants in which a heterologous gene has been stably integrated into the genome. The expression “heterologous gene” essentially means a gene which is provided or assembled outside the plant and when introduced in the nuclear, chloroplastic or mitochondrial genome gives the transformed plant new or improved agronomic or other properties by expressing a protein or polypeptide of interest or by downregulating or silencing other gene(s) which are present in the plant (using for example, antisense technology, co suppression technology or RNA interference—RNAi—technology). A heterologous gene that is located in the genome is also called a transgene. A transgene that is defined by its particular location in the plant genome is called a transformation or transgenic event.
Depending on the plant species or plant cultivars, their location and growth conditions (soils, climate, vegetation period, diet), the treatment according to the invention may also result in superadditive (“synergistic”) effects. Thus, for example, reduced application rates and/or a widening of the activity spectrum and/or an increase in the activity of the active compounds and compositions which can be used according to the invention, better plant growth, increased tolerance to high or low temperatures, increased tolerance to drought or to water or soil salt content, increased flowering performance, easier harvesting, accelerated maturation, higher harvest yields, bigger fruits, larger plant height, greener leaf color, earlier flowering, higher quality and/or a higher nutritional value of the harvested products, higher sugar concentration within the fruits, better storage stability and/or processability of the harvested products are possible, which exceed the effects which were actually to be expected.
At certain application rates, the active compound combinations according to the invention may also have a strengthening effect in plants. Accordingly, they are also suitable for mobilizing the defense system of the plant against attack by unwanted phytopathogenic fungi and/or microorganisms and/or viruses. This may, if appropriate, be one of the reasons of the enhanced activity of the combinations according to the invention, for example against fungi. Plant-strengthening (resistance-inducing) substances are to be understood as meaning, in the present context, those substances or combinations of substances which are capable of stimulating the defense system of plants in such a way that, when subsequently inoculated with unwanted phytopathogenic fungi and/or microorganisms and/or viruses, the treated plants display a substantial degree of resistance to these unwanted phytopathogenic fungi and/or microorganisms and/or viruses. In the present case, unwanted phytopathogenic fungi and/or microorganisms and/or viruses are to be understood as meaning phytopathogenic fungi, bacteria and viruses. Thus, the substances according to the invention can be employed for protecting plants against attack by the abovementioned pathogens within a certain period of time after the treatment. The period of time within which protection is effected generally extends from 1 to 10 days, preferably 1 to 7 days, after the treatment of the plants with the active compounds.
Plants and plant cultivars which are preferably to be treated according to the invention include all plants which have genetic material which impart particularly advantageous, useful traits to these plants (whether obtained by breeding and/or biotechnological means).
Plants and plant cultivars which are also preferably to be treated according to the invention are resistant against one or more biotic stresses, i.e. said plants show a better defense against animal and microbial pests, such as against nematodes, insects, mites, phytopathogenic fungi, bacteria, viruses and/or viroids.
Plants and plant cultivars which may also be treated according to the invention are those plants which are resistant to one or more abiotic stresses. Abiotic stress conditions may include, for example, drought, cold temperature exposure, heat exposure, osmotic stress, flooding, increased soil salinity, increased mineral exposure, ozon exposure, high light exposure, limited availability of nitrogen nutrients, limited availability of phosphorus nutrients, shade avoidance.
Plants and plant cultivars which may also be treated according to the invention, are those plants characterized by enhanced yield characteristics. Increased yield in said plants can be the result of, for example, improved plant physiology, growth and development, such as water use efficiency, water retention efficiency, improved nitrogen use, enhanced carbon assimilation, improved photosynthesis, increased germination efficiency and accelerated maturation. Yield can furthermore be affected by improved plant architecture (under stress and non-stress conditions), including but not limited to, early flowering, flowering control for hybrid seed production, seedling vigor, plant size, internode number and distance, root growth, seed size, fruit size, pod size, pod or ear number, seed number per pod or ear, seed mass, enhanced seed filling, reduced seed dispersal, reduced pod dehiscence and lodging resistance. Further yield traits include seed composition, such as carbohydrate content, protein content, oil content and composition, nutritional value, reduction in anti-nutritional compounds, improved processability and better storage stability.
Plants that may be treated according to the invention are hybrid plants that already express the characteristic of heterosis or hybrid vigor which results in generally higher yield, vigor, health and resistance towards biotic and abiotic stress factors. Such plants are typically made by crossing an inbred male-sterile parent line (the female parent) with another inbred male-fertile parent line (the male parent). Hybrid seed is typically harvested from the male sterile plants and sold to growers. Male sterile plants can sometimes (e.g. in corn) be produced by detasseling, i.e. the mechanical removal of the male reproductive organs (or males flowers) but, more typically, male sterility is the result of genetic determinants in the plant genome. In that case, and especially when seed is the desired product to be harvested from the hybrid plants it is typically useful to ensure that male fertility in the hybrid plants is fully restored. This can be accomplished by ensuring that the male parents have appropriate fertility restorer genes which are capable of restoring the male fertility in hybrid plants that contain the genetic determinants responsible for male-sterility. Genetic determinants for male sterility may be located in the cytoplasm. Examples of cytoplasmic male sterility (CMS) were for instance described in Brassica species (WO 1992/005251, WO 1995/009910, WO 1998/27806, WO 2005/002324, WO 2006/021972 and U.S. Pat. No. 6,229,072). However, genetic determinants for male sterility can also be located in the nuclear genome. Male sterile plants can also be obtained by plant biotechnology methods such as genetic engineering. A particularly useful means of obtaining male-sterile plants is described in WO 1989/10396 in which, for example, a ribonuclease such as barnase is selectively expressed in the tapetum cells in the stamens. Fertility can then be restored by expression in the tapetum cells of a ribonuclease inhibitor such as barstar (e.g. WO 1991/002069).
Plants or plant cultivars (obtained by plant biotechnology methods such as genetic engineering) which may be treated according to the invention are herbicide-tolerant plants, i.e. plants made tolerant to one or more given herbicides. Such plants can be obtained either by genetic transformation, or by selection of plants containing a mutation imparting such herbicide tolerance.
Herbicide-tolerant plants are for example glyphosate-tolerant plants, i.e. plants made tolerant to the herbicide glyphosate or salts thereof. Plants can be made tolerant to glyphosate through different means. For example, glyphosate-tolerant plants can be obtained by transforming the plant with a gene encoding the enzyme 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS). Examples of such EPSPS genes are the AroA gene (mutant CT7) of the bacterium Salmonella typhimurium, the CP4 gene of the bacterium Agrobacterium sp., the genes encoding a Petunia EPSPS, a Tomato EPSPS, or an Eleusine EPSPS (WO 2001/66704). It can also be a mutated EPSPS as described in for example EP-A 0837944, WO 2000/066746, WO 2000/066747 or WO 2002/026995. Glyphosate-tolerant plants can also be obtained by expressing a gene that encodes a glyphosate oxido-reductase enzyme as described in U.S. Pat. No. 5,776,760 and U.S. Pat. No. 5,463,175. Glyphosate-tolerant plants can also be obtained by expressing a gene that encodes a glyphosate acetyl transferase enzyme as described in for example WO 2002/036782, WO 2003/092360, WO 2005/012515 and WO 2007/024782. Glyphosate-tolerant plants can also be obtained by selecting plants containing naturally-occurring mutations of the above-mentioned genes, as described in for example WO 2001/024615 or WO 2003/013226. Other herbicide resistant plants are for example plants that are made tolerant to herbicides inhibiting the enzyme glutamine synthase, such as bialaphos, phosphinothricin or glufosinate. Such plants can be obtained by expressing an enzyme detoxifying the herbicide or a mutant glutamine synthase enzyme that is resistant to inhibition. One such efficient detoxifying enzyme is an enzyme encoding a phosphinothricin acetyltransferase (such as the bar or pat protein from Streptomyces species). Plants expressing an exogenous phosphinothricin acetyltransferase are for example described in U.S. Pat. No. 5,561,236; U.S. Pat. No. 5,648,477; U.S. Pat. No. 5,646,024; U.S. Pat. No. 5,273,894; U.S. Pat. No. 5,637,489; U.S. Pat. No. 5,276,268; U.S. Pat. No. 5,739,082; U.S. Pat. No. 5,908,810 and U.S. Pat. No. 7,112,665.
Further herbicide-tolerant plants are also plants that are made tolerant to the herbicides inhibiting the enzyme hydroxyphenylpyruvatedioxygenase (HPPD). Hydroxyphenylpyruvatedioxygenases are enzymes that catalyze the reaction in which para-hydroxyphenylpyruvate (HPP) is transformed into homogentisate. Plants tolerant to HPPD-inhibitors can be transformed with a gene encoding a naturally-occurring resistant HPPD enzyme, or a gene encoding a mutated HPPD enzyme as described in WO 1996/038567, WO 1999/024585 and WO 1999/024586. Tolerance to HPPD-inhibitors can also be obtained by transforming plants with genes encoding certain enzymes enabling the formation of homogentisate despite the inhibition of the native HPPD enzyme by the HPPD-inhibitor. Such plants and genes are described in WO 1999/034008 and WO 2002/36787. Tolerance of plants to HPPD inhibitors can also be improved by transforming plants with a gene encoding an enzyme prephenate dehydrogenase in addition to a gene encoding an HPPD-tolerant enzyme, as described in WO 2004/024928.
Still further herbicide resistant plants are plants that are made tolerant to acetolactate synthase (ALS) inhibitors. Known ALS-inhibitors include, for example, sulfonylurea, imidazolinone, triazolopyrimidines, pyrimidinyloxy(thio)benzoates, and/or sulfonylaminocarbonyltriazolinone herbicides. Different mutations in the ALS enzyme (also known as acetohydroxyacid synthase, AHAS) are known to confer tolerance to different herbicides and groups of herbicides, as described for example in U.S. Pat. No. 5,605,011, U.S. Pat. No. 5,378,824, U.S. Pat. No. 5,141,870, and U.S. Pat. No. 5,013,659. The production of sulfonylurea-tolerant plants and imidazolinone-tolerant plants is described in U.S. Pat. No. 5,605,011; U.S. Pat. No. 5,013,659; U.S. Pat. No. 5,141,870; U.S. Pat. No. 5,767,361; U.S. Pat. No. 5,731,180; U.S. Pat. No. 5,304,732; U.S. Pat. No. 4,761,373; U.S. Pat. No. 5,331,107; U.S. Pat. No. 5,928,937; and U.S. Pat. No. 5,378,824; and international publication WO 1996/033270. Other imidazolinone-tolerant plants are also described in for example WO 2004/040012, WO 2004/106529, WO 2005/020673, WO 2005/093093, WO 2006/007373, WO 2006/015376, WO 2006/024351, and WO 2006/060634. Further sulfonylurea- and imidazolinone-tolerant plants are also described in for example WO 2007/024782.
Other plants tolerant to imidazolinone and/or sulfonylurea can be obtained by induced mutagenesis, selection in cell cultures in the presence of the herbicide or mutation breeding as described for example for soybeans in U.S. Pat. No. 5,084,082, for rice in WO 1997/41218, for sugar beet in U.S. Pat. No. 5,773,702 and WO 1999/057965, for lettuce in U.S. Pat. No. 5,198,599, or for sunflower in WO 2001/065922.
Plants or plant cultivars (obtained by plant biotechnology methods such as genetic engineering) which may also be treated according to the invention are insect-resistant transgenic plants, i.e. plants made resistant to attack by certain target insects. Such plants can be obtained by genetic transformation, or by selection of plants containing a mutation imparting such insect resistance. An “insect-resistant transgenic plant”, as used herein, includes any plant containing at least one transgene comprising a coding sequence encoding:
Of course, an insect-resistant transgenic plant, as used herein, also includes any plant comprising a combination of genes encoding the proteins of any one of the above classes 1 to 8. In one embodiment, an insect-resistant plant contains more than one transgene encoding a protein of any one of the above classes 1 to 8, to expand the range of target insect species affected when using different proteins directed at different target insect species, or to delay insect resistance development to the plants by using different proteins insecticidal to the same target insect species but having a different mode of action, such as binding to different receptor binding sites in the insect.
Plants or plant cultivars (obtained by plant biotechnology methods such as genetic engineering) which may also be treated according to the invention are tolerant to abiotic stresses. Such plants can be obtained by genetic transformation, or by selection of plants containing a mutation imparting such stress resistance. Particularly useful stress tolerance plants include:
Plants or plant cultivars (obtained by plant biotechnology methods such as genetic engineering) which may also be treated according to the invention show altered quantity, quality and/or storage-stability of the harvested product and/or altered properties of specific ingredients of the harvested product such as:
Plants or plant cultivars (that can be obtained by plant biotechnology methods such as genetic engineering) which may also be treated according to the invention are plants, such as cotton plants, with altered fiber characteristics. Such plants can be obtained by genetic transformation, or by selection of plants contain a mutation imparting such altered fiber characteristics and include:
Plants or plant cultivars (that can be obtained by plant biotechnology methods such as genetic engineering) which may also be treated according to the invention are plants, such as oilseed rape or related Brassica plants, with altered oil profile characteristics. Such plants can be obtained by genetic transformation or by selection of plants contain a mutation imparting such altered oil characteristics and include:
Particularly useful transgenic plants which may be treated according to the invention are plants which comprise one or more genes which encode one or more toxins, such as the following which are sold under the trade names YIELD GARD® (for example maize, cotton, soya beans), KnockOut® (for example maize), BiteGard® (for example maize), Bt-Xtra® (for example maize), StarLink® (for example maize), Bollgard® (cotton), Nucotn® (cotton), Nucotn 33B®(cotton), NatureGard® (for example maize), Protecta® and NewLeaf® (potato). Examples of herbicide-tolerant plants which may be mentioned are maize varieties, cotton varieties and soya bean varieties which are sold under the trade names Roundup Ready® (tolerance to glyphosate, for example maize, cotton, soya bean), Liberty Link® (tolerance to phosphinotricin, for example oilseed rape), IMI® (tolerance to imidazolinones) and STS® (tolerance to sulfonylureas, for example maize). Herbicide-resistant plants (plants bred in a conventional manner for herbicide tolerance) which may be mentioned include the varieties sold under the name Clearfield® (for example maize).
The composition according to the invention can also be used against fungal diseases liable to grow on or inside timber. The term “timber” means all types of species of wood and all types of working of this wood intended for construction, for example solid wood, high-density wood, laminated wood and plywood. The method for treating timber according to the invention mainly consists in contacting one or more compounds according to the invention or a composition according to the invention; this includes for example direct application, spraying, dipping, injection or any other suitable means.
Among the diseases of plants or crops that can be controlled by the method according to the invention, mention can be made of:
Powdery mildew diseases such as:
Bremia diseases, caused for example by Bremia lactucae;
The compounds according to the invention can also be used for the preparation of composition useful to curatively or preventively treat human or animal fungal diseases such as, for example, mycoses, dermatoses, trichophyton diseases and candidiases or diseases caused by Aspergillus spp., for example Aspergillus fumigatus.
The present invention further relates to the use of compounds of the formula (I) as herein defined for the control of phytopathogenic fungi.
The present invention further relates to the use of compounds of the formula (I) as herein defined for the treatment of transgenic plants.
The present invention further relates to the use of compounds of the formula (I) as herein defined for the treatment of seed and of seed of transgenic plants.
The present invention further relates to a process for producing compositions for controlling phytopathogenic harmful fungi, characterized in that derivatives of the formula (I) as herein defined are mixed with extenders and/or surfactants.
The various aspects of the invention will now be illustrated with reference to the following Table 1 of compound examples and the following preparation or efficacy examples.
The following Table 1 illustrates in a non limiting manner examples of compounds according to the invention.
In table 1, we use this following abbreviation for specified claimed elements “A1, A11” of the generic structure (I) of the invention:
[a]Measurement of LC-MS was done at pH 2.7 with 0.1% formic acid in water and with acetonitrile (contains 0.1% formic acid) as eluent with a linear gradient from 10% acetonitrile to 95% acetonitrile.
Calibration was done with not branched alkan2-ones (with 3 to 16 carbon atoms) with known log P-values (measurement of log P values using retention times with linear interpolation between successive alkanones). lambda-maX-values were determined using UV-spectra from 200 nm to 400 nm and the peak values of the chromatographic signals.
1H-NMR data of selected examples are written in form of 1H-NMR-peak lists. To each signal peak are listed the δ-value in ppm and the signal intensity in round brackets. Between the δ-value—signal intensity pairs are semicolons as delimiters.
The peak list of an example has therefore the form:
δ1 (intensity1); δ2 (intensity2); . . . ; δi (intensityi); . . . ; δn (intensityn)
Intensity of sharp signals correlates with the height of the signals in a printed example of a NMR spectrum in cm and shows the real relations of signal intensities. From broad signals several peaks or the middle of the signal and their relative intensity in comparison to the most intensive signal in the spectrum can be shown.
For calibrating chemical shift for 1H spectra, we use tetramethylsilane and/or the chemical shift of the solvent used, especially in the case of spectra measured in DMSO. Therefore in NMR peak lists, tetramethylsilane peak can occur but not necessarily.
The 1H-NMR peak lists are similar to classical 1H-NMR prints and contain therefore usually all peaks, which are listed at classical NMR-interpretation.
Additionally they can show like classical 1H-NMR prints signals of solvents, stereoisomers of the target compounds, which are also object of the invention, and/or peaks of impurities.
To show compound signals in the delta-range of solvents and/or water the usual peaks of solvents, for example peaks of DMSO in DMSO-D6 and the peak of water are shown in our 1H-NMR peak lists and have usually on average a high intensity.
The peaks of stereoisomers of the target compounds and/or peaks of impurities have usually on average a lower intensity than the peaks of target compounds (for example with a purity>90%). Such stereoisomers and/or impurities can be typical for the specific preparation process. Therefore their peaks can help to recognize the reproduction of our preparation process via “side-products-fingerprints”.
An expert, who calculates the peaks of the target compounds with known methods (MestreC, ACD-simulation, but also with empirically evaluated expectation values) can isolate the peaks of the target compounds as needed optionally using additional intensity filters. This isolation would be similar to relevant peak picking at classical 1H-NMR interpretation.
Further details of NMR-data description with peak lists you find in the publication “Citation of NMR Peaklist Data within Patent Applications” of the Research Disclosure Database Number 564025.
In table 2, we use this following abbreviation for specified claimed element “A1” of the generic structure (VIII) of the invention:
[a]Measurement of LC-MS was done at pH 2.7 with 0.1% formic acid in water and with acetonitrile (contains 0.1% formic acid) as eluent with a linear gradient from 10% acetonitrile to 95% acetonitrile.
Calibration was done with not branched alkan2-ones (with 3 to 16 carbon atoms) with known log P-values (measurement of log P values using retention times with linear interpolation between successive alkanones). lambda-maX-values were determined using UV-spectra from 200 nm to 400 nm and the peak values of the chromatographic signals.
1H-NMR data of selected examples are written in form of 1H-NMR-peak lists. To each signal peak are listed the δ-value in ppm and the signal intensity in round brackets. Between the δ-value—signal intensity pairs are semicolons as delimiters.
The peak list of an example has therefore the form:
δ1 (intensity1); δ2 (intensity2); . . . ; δi (intensityi); . . . ; δn (intensityn)
Intensity of sharp signals correlates with the height of the signals in a printed example of a NMR spectrum in cm and shows the real relations of signal intensities. From broad signals several peaks or the middle of the signal and their relative intensity in comparison to the most intensive signal in the spectrum can be shown.
For calibrating chemical shift for 1H spectra, we use tetramethylsilane and/or the chemical shift of the solvent used, especially in the case of spectra measured in DMSO. Therefore in NMR peak lists, tetramethylsilane peak can occur but not necessarily.
The 1H-NMR peak lists are similar to classical 1H-NMR prints and contain therefore usually all peaks, which are listed at classical NMR-interpretation.
Additionally they can show like classical 1H-NMR prints signals of solvents, stereoisomers of the target compounds, which are also object of the invention, and/or peaks of impurities.
To show compound signals in the delta-range of solvents and/or water the usual peaks of solvents, for example peaks of DMSO in DMSO-D6 and the peak of water are shown in our 1H-NMR peak lists and have usually on average a high intensity.
The peaks of stereoisomers of the target compounds and/or peaks of impurities have usually on average a lower intensity than the peaks of target compounds (for example with a purity>90%). Such stereoisomers and/or impurities can be typical for the specific preparation process. Therefore their peaks can help to recognize the reproduction of our preparation process via “side-products-fingerprints”.
An expert, who calculates the peaks of the target compounds with known methods (MestreC, ACD-simulation, but also with empirically evaluated expectation values) can isolate the peaks of the target compounds as needed optionally using additional intensity filters. This isolation would be similar to relevant peak picking at classical 1H-NMR interpretation.
Further details of NMR-data description with peak lists you find in the publication “Citation of NMR Peaklist Data within Patent Applications” of the Research Disclosure Database Number 564025.
Biology
The tested active ingredients are prepared by homogenization in a mixture of acetone/Dimethyl sulfoxide/Tween®, and then diluted with water to obtain the desired active material concentration.
The young plants of gherkin are treated by spraying the active ingredient prepared as described above. Control plants are treated only with an aqueous solution of acetone/Dimethyl sulfoxide/Tween®.
After 24 hours, the plants are contaminated by spraying the leaves with an aqueous suspension of Botrytis cinerea spores. The contaminated gherkin plants are incubated for 4 to 5 days at 17° C. and at 90% relative humidity.
The test is evaluated 4 to 5 days after the inoculation. 0% means an efficacy which corresponds to that of the control plants while an efficacy of 100% means that no disease is observed.
In this test the following compounds according to the invention showed efficacy of at least 70% at a concentration of 500 ppm of active ingredient.
The tested active ingredients are prepared by homogenization in a mixture of acetone/Dimethyl sulfoxide/Tween®, and then diluted with water to obtain the desired active material concentration.
The young plants of tomato are treated by spraying the active ingredient prepared as described above. Control plants are treated only with an aqueous solution of acetone/Dimethyl sulfoxide/Tween®.
After 24 hours, the plants are contaminated by spraying the leaves with an aqueous suspension of Phytophthora infestans spores. The contaminated tomato plants are incubated for 5 days at 16-18° C. and at 100% relative humidity.
The test is evaluated 5 days after the inoculation. 0% means an efficacy which corresponds to that of the control plants while an efficacy of 100% means that no disease is observed.
In this test the following compounds according to the invention showed efficacy of at least 70% at a concentration of 500 ppm of active ingredient.
The tested active ingredients are prepared by homogenization in a mixture of acetone/Dimethyl sulfoxide/Tween®, and then diluted with water to obtain the desired active material concentration.
The young plants of barley are treated by spraying the active ingredient prepared as described above. Control plants are treated only with an aqueous solution of acetone/Dimethyl sulfoxide/Tween®.
After 24 hours, the plants are contaminated by spraying the leaves with an aqueous suspension of Pyrenophora teres spores. The contaminated barley plants are incubated for 48 hours at 20° C. and at 100% relative humidity and then for 12 days at 20° C. and at 70-80% relative humidity.
The test is evaluated 14 days after the inoculation. 0% means an efficacy which corresponds to that of the control plants while an efficacy of 100% means that no disease is observed.
In this test the following compounds according to the invention showed efficacy of at least 70% at a concentration of 500 ppm of active ingredient.
To produce a suitable preparation of active compound, 1 part by weight of active compound is mixed with the stated amounts of solvent and emulsifier, and the concentrate is diluted with water to the desired concentration.
To test for preventive activity, young plants are sprayed with the preparation of active compound at the stated rate of application. After the spray coating has dried on, the plants are inoculated with an aqueous spore suspension of Plasmopara viticola and then remain for 1 day in an incubation cabinet at approximately 20° C. and a relative atmospheric humidity of 100%. The plant is subsequently placed for 4 days in a greenhouse at approximately 21° C. and a relative atmospheric humidity of approximately 90%. The plants are then misted and placed for 1 day in an incubation cabinet.
The test is evaluated 6 days after the inoculation. 0% means an efficacy which corresponds to that of the untreated control, while an efficacy of 100% means that no disease is observed.
In this test the following compounds according to the invention showed efficacy of 70% or even higher at a concentration of 10 ppm of active ingredient.
The following examples illustrate in a non-limiting manner the preparation and efficacy of the compounds of formula (I) according to the invention.
To a solution of (2Z)-(hydroxyimino)(phenyl)acetonitrile (120 g, 0.82 mol, 1 eq.) in 1.6 l of acetonitrile were added potassium iodide (13.6 g, 82 mmol, 0.1 eq.) and caesium carbonate (401 g, 1.23 mol, 1.5 eq.) followed by a solution of tert-butyl [6-(chloromethyl)pyridin-2-yl]carbamate (199 g, 0.82 mol, 1 eq.) in 2 l acetonitrile and 360 ml DMF. The reaction was stirred overnight at room temperature. The mixture was poured in 5 l of water and stirred overnight. The precipitate was filtered and dried to afford tert-butyl {6-[({[(Z)-cyano(phenyl)methylene]amino}oxy)methyl]pyridin-2-yl}carbamate (270 g, 91% yield, only 1 oxime isomer) as a white solid.
To a solution of tert-butyl {6-[({[(Z)-cyano(phenyl)methylene]amino}oxy)methyl]pyridin-2-yl}carbamate (150 g, 426 mmol, 1 eq.) in iPrOH (1 L) was added a solution of hydroxylamine hydrochloride (88.7 g, 1.28 mol, 3 eq.) in iPrOH (1 L), followed by potassium carbonate (176 g, 1.28 mol, 3 eq.) and water (525 ml). The reaction was stirred at 75° C. for 5 h and at room temperature overnight. The precipitate was filtered, washed with water and dried to give tert-butyl {6-[({[(1Z,2Z)-2-amino-2-(hydroxyimino)-1-phenylethylidene]amino}oxy)methyl]pyridin-2-yl}carbamate (139 g, 82% yield) as a white solid.
To a solution of tert-butyl {6-[({[(1Z,2Z)-2-amino-2-(hydroxyimino)-1-phenylethylidene]amino}oxy)methyl]pyridin-2-yl}carbamate (153 g, 397 mmol, 1 eq.) in acetonitrile (2.5 l) was added CDI (65.8 g, 406 mmol, 1.02 eq.). The mixture was heated at 80° C. for 3 h. The precipitate was filtered, washed with water and diisopropyl ether and dried to afford tert-butyl {6-[({[(Z)-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)(phenyl)methylene]amino}oxy)methyl]pyridin-2-yl}carbamate (124 g, 53% yield) as an orange powder.
To a solution of tert-butyl {6-[({[(Z)-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)(phenyl)methylene]amino}oxy)methyl]pyridin-2-yl}carbamate (124 g, 300 mmol, 1 eq.) in MeCN (3 l) and DMF (500 ml) was added potassium carbonate (49.8 g, 360 mmol, 1.2 eq.) followed by iodomethane (64 g, 450 mmol, 1.5 eq.). The reaction was stirred at room temperature for 8 h. The reaction was concentrated and water (5 l) was added. The mixture was extracted with dichloromethane. The organics were combined, washed with aq. sat. LiCl and water, dried over MgSO4 and concentrate to afford tert-butyl {6-[({[(Z)-(4-methyl-5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)(phenyl)methylene]amino}oxy)methyl]pyridin-2-yl}carbamate (128 g, 86% yield).
To a solution of tert-butyl {6-[({[(Z)-(4-methyl-5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)(phenyl)methylene]amino}oxy)methyl]pyridin-2-yl}carbamate (9.0 g, 21.2 mmol, 1 eq) in THF (45 mL) was added NaOH 1N (105 mL). The mixture was stirred at 60° C. overnight. The mixture was neutralized at room temperature with HCl 1N (105 mL) and extracted with dichloromethane. The layer were separated and the organic layer was dried over MgSO4 and concentrated to afford tert-butyl {6-[({[(1Z,2Z)-2-(hydroxyimino)-2-(methylamino)-1-phenylethylidene]amino}oxy)methyl]pyridin-2-yl}carbamate (7.19 g, 90%), compound VIII-1, as a yellow solid.
To a solution of tert-butyl {6-[({[(1Z,2Z)-2-(hydroxyimino)-2-(methylamino)-1-phenylethylidene]amino}oxy)methyl]pyridin-2-yl}carbamate (100 mg, 0.213 mmol, 1 eq) in THF (2 ml) was added at 0° C., triethylamine (0.059 ml, 0.426 mmol, 2 eq) followed by thiophosgene (24.5 mg, 0.213 mmol, 1 eq). The mixture was stirred at room temperature for 45 min. Water and ethyl acetate were added. The layers were separated and the organic layer was dried over MgSO4 and concentrated. The residue was purified by chromatography on silica gel to afford tert-butyl {6-[({[(Z)-(4-methyl-5-thioxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)(phenyl)methylene]amino}oxy)methyl]pyridin-2-yl}carbamate (70 mg, 70%).
To a solution of tert-butyl {6-[({[(Z)-(4-methyl-5-thioxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)(phenyl)methylene]amino}oxy)methyl]pyridin-2-yl}carbamate (4.74 g, 6.01 mmol, 56% purity, 1 eq.) in dichloromethane (50 ml) was added trifluoroacetic acid (4.63 mL, 60.1 mmol, 10 eq) and stirring was allowed overnight. The reaction was quenched by addition of NaOH 1N (110 mL). The layers were separated and the organic layer was dried over MgSO4 and concentrated. The residue was purified by chromatography on silica gel to afford 3-[(Z)-{[(6-aminopyridin-2-yl)methoxy]imino}(phenyl)methyl]-4-methyl-1,2,4-oxadiazole-5(4H)-thione (960 mg, 44%).
To a solution of 3-[(Z)-{[(6-aminopyridin-2-yl)methoxy]imino}(phenyl)methyl]-4-methyl-1,2,4-oxadiazole-5(4H)-thione (235 mg, 0.688 mmol, 1 eq.) in dichloromethane (4 ml) was added pyridine (0.067 ml, 0.827 mmol, 1.2 eq) and but-3-yn-1-ylcarbamoyl chloride (0.094 ml, 0.826 mmol, 1.2 eq.) and stirring was allowed for 4 h. The reaction was quenched by addition of NaOH 1M (2 ml). The layers were separated and the organic layer was dried over MgSO4 and concentrated. The residue was purified by chromatography on silica gel to give but-3-yn-1-yl {6-[({[(Z)-(4-methyl-5-thioxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)(phenyl)methylene]amino}oxy)methyl]pyridin-2-yl}carbamate (270 mg, 85% yield).
To a solution of (2Z)-(hydroxyimino)(phenyl)acetonitrile (7.3 g, 49.95 mmol, 1 eq.) in 280 ml of acetonitrile and 30 ml of DMF, was added 4-(chloromethyl)-1,3-thiazol-2-amine hydrochloride (11.09 g, 59.94 mmol, 1.2 eq.) followed by potassium iodide (829 mg, 4.99 mmol, 0.1 eq.) and caesium carbonate (39.06 g, 119.88 mmol, 2.4 eq.). The reaction was stirred overnight at room temperature. The solvent was then evaporated and the residue dissolved in EtOAc, subsequently washed with H2O and brine. Ater separation, the organic phase was dried over MgSO4 then concentrated. The residue was purified by chromatography on silica gel to give (2Z)-{[(2-amino-1,3-thiazol-4-yl)methoxy]imino}(phenyl)acetonitrile (10.30 g, 80% yield, only 1 oxime isomer).
To a solution of (2Z)-{[(2-amino-1,3-thiazol-4-yl)methoxy]imino}(phenyl)acetonitrile (10.30 g, 39.87 mmol, 1 eq.) and cesium carbonate (11.02 g, 79.75 mmol, 2.0 eq) in 2-propanol/water (150 ml/40 ml), was added N-methylhydroxylamine hydrochloride (6.66 g, 79.75 mmol, 2 eq.). The reaction was heated under stirring to 85° C. for 2 h and the solvent was evaporated to ¾th The residue was extracted with EtOAc and washed with water. The organics were combined, dried over MgSO4 and concentrated to give (2Z)-2-{[(2-amino-1,3-thiazol-4-yl)methoxy]imino}-N-hydroxy-N-methyl-2-phenylethanimidamide (10.30 g, 84% yield), as a yellow solid.
To a solution of (2Z)-2-{[(2-amino-1,3-thiazol-4-yl)methoxy]imino}-N-hydroxy-N-methyl-2-phenylethanimidamide (5.00 g, 16.37 mmol, 1 eq.) and triethylamine (4.57 ml, 32.75 mmol, 2 eq) in THF (200 ml) at 0° C., was added thiophosgene (1.88 g, 16.37 mmol, 1 eq.). After stirring at room temperature for 30 min, the reaction was quenched by addition of water (100 ml) and extracted with EtOAc (2×150 ml). The organics were combined, washed with NaHCO3 aq. sat., dried over MgSO4 and concentrated. The residue was purified by chromatography on silica gel to give 3-[(Z)-{[(2-amino-1,3-thiazol-4-yl)methoxy]imino}(phenyl)methyl]-2-methyl-1,2,4-oxadiazole-5(2H)-thione (3 g, 52% yield).
To a solution of 3-[(Z)-{[(2-amino-1,3-thiazol-4-yl)methoxy]imino}(phenyl)methyl]-2-methyl-1,2,4-oxadiazole-5(2H)-thione (120 mg, 0.345 mmol, 1 eq.) in acetonitrile (2 ml) was added 4-fluorophenylcarbonochloridate (0.05 ml, 0.380 mmol, 1.1 eq.), followed by pyridine (0.028 mL, 0.345 mmol, 1 eq.) and stirring was allowed for 2 hours at room temperature. Tert-butanol (0.036 ml, 0.380 mmol, 1.1 eq.) was then added and the resulting mixture was stirred at 60° C. overnight. After concentration, the residue was diluted in DCM, washed with water, dried over MgSO4 and evaporated. The residue was purified by chromatography on silica gel to give tert-butyl {4-[({[(Z)-(2-methyl-5-thioxo-2,5-dihydro-1,2,4-oxadiazol-3-yl)(phenyl)methylene]amino}oxy)methyl]-1,3-thiazol-2-yl}carbamate (30 mg, 18% yield) as a transparent oil.
| Number | Date | Country | Kind |
|---|---|---|---|
| 13356005.2 | Mar 2013 | EP | regional |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2014/054295 | 3/6/2014 | WO | 00 |
| Number | Date | Country | |
|---|---|---|---|
| 61805958 | Mar 2013 | US |
