Plant protecting and regulating compositions – Plant growth regulating compositions – Organic active compound containing
Reexamination Certificate
1999-10-07
2002-04-23
Raymond, Richard L. (Department: 1611)
Plant protecting and regulating compositions
Plant growth regulating compositions
Organic active compound containing
C504S292000, C504S294000, C504S333000, C504S348000, C548S240000, C549S427000, C549S498000, C564S099000, C568S329000
Reexamination Certificate
active
06376429
ABSTRACT:
The invention relates to the technical field of the herbicides and plant growth regulators, in particular that of the herbicides for the selective control of weeds and weed grasses in useful plant crops.
It is already disclosed in various patents that certain benzoylcyclohexanediones, inter alia also those which carry, for example, a radical linked via a bridge in the 3-position of the phenyl ring, have herbicidal properties. Thus in JP-A 08 020554 those benzoylcyclohexanediones are described which carry a substituted phenoxymethyl radical in the position mentioned. JP-A 02 00222 describes benzoylcyclohexanediones which likewise carry a radical linked via a bridge in the 3-position mentioned, this bridge containing at least one atom from the group consisting of oxygen, sulfur and nitrogen. WO 99/10327, WO 99/07688 and WO 99/03845 describe benzoylcyclohexanediones which in the 3-position carry a heterocyclic radical linked via a carbon chain, which in the case of WO 99/07688 is also interrupted by heteroatoms.
The use of the benzoylcyclohexanediones known from these patents is, however, frequently associated with disadvantages in practice. Thus the herbicidal or plant growth-regulating activity of the known compounds is not always adequate, or if the herbicidal activity is adequate undesired damage to the useful plants is observed.
The object of the present invention is the provision of compounds which have a herbicidal and plant growth-regulating action and which overcome the disadvantages known from the prior art.
The object is achieved by benzoylcyclohexanediones, specifically substituted in the 3-position of the phenyl ring, of the formula (I)
in which the substituents and symbols have the following meaning:
R
1
is an optionally substituted hydrocarbon radical, which optionally additionally contains one or more, identical or different heteroatoms from the group consisting of phosphorus, oxygen, sulfur, nitrogen, fluorine, chlorine, bromine and iodine;
R
2
, R
3
, R
4
and R
5
independently of one another are hydrogen, hydroxyl, thio, amino, cyano, nitro, halogen or an optionally substituted hydrocarbon radical, which optionally additionally contains one or more, identical or different heteroatoms from the group consisting of phosphorus, oxygen, sulfur, nitrogen, fluorine, chlorine, bromine and iodine;
R
6
is OR
12
, alkylthio, haloalkylthio, alkenylthio, haloalkenylthio, alkynylthio, haloalkynylthio, alkylsulfinyl, haloalkylsulfinyl, alkenylsulfinyl, haloalkenylsulfinyl, alkynylsulfinyl, haloalkynylsulfinyl, alkylsulfonyl, haloalkylsulfonyl, alkenylsulfonyl, haloalkenylsulfonyl, alkynylsulfonyl, haloalkynylsulfonyl, cyano, cyanato, thiocyanato or halogen;
R
7
is hydrogen, tetrahydropyran-3-yl, tetrahydropyran-4-yl, tetrahydrothiopyran-3-yl, alkyl, cycloalkyl, alkoxy, alkoxyalkyl, alkylcarbonyl, alkoxycarbonyl, alkylthio, phenyl, where the eight last-mentioned groups are optionally substituted by one or more, identical or different radicals from the group consisting of halogen, alkylthio and alkyloxy, or
two radicals R
7
bonded to a common carbon atom form a chain from the group consisting of OCH
2
CH
2
O, OCH
2
CH
2
CH
2
O, SCH
2
CH
2
S and SCH
2
CH
2
CH
2
S, this optionally being substituted by one to four methyl groups, or
two radicals R
7
bonded to directly adjacent carbon atoms form a bond or, with the carbon atoms carrying them, form a 3- to 6-membered ring optionally substituted by one or more, identical or different radicals from the group consisting of halogen, alkyl, alkylthio and alkoxy;
R
12
is hydrogen, alkyl, haloalkyl, alkoxyalkyl, formyl, alkylcarbonyl, alkoxycarbonyl, alkylaminocarbonyl, dialkylaminocarbonyl, alkylsulfonyl, haloalkylsulfonyl, benzoyl or phenylsulfonyl, the two last-mentioned groups optionally being substituted by one or more, identical or different radicals from the group consisting of alkyl, haloalkyl, alkoxy, haloalkoxy, halogen, cyano and nitro;
L is a C
1
-C
6
-alkylene chain which is optionally substituted by one or more, identical or different radicals R
2
;
Y is a divalent unit from the group consisting of O, S, N—H, N-alkyl, CHR
7
and C(R
7
)
2
;
Z is a direct bond, a divalent unit from the group consisting of O, S, SO, SO
2
, N—H, N-alkyl, CHR
7
and C(R
7
)
2
;
v is 1 or 2;
w is 0, 1, 2, 3 or 4,
with the proviso that —L—R
1
should not be optionally substituted CH
2
—O-phenyl when R
2
and R
3
are each chlorine and R
4
and R
5
are each hydrogen.
Numerous compounds of the formula (I) according to the invention can occur in different tautomeric structures, depending on external conditions, such as solvent and pH.
In the case in which R
6
is hydroxyl, the following tautomeric structures are possible:
Depending on the type of substituents, the compounds of the formula (I) contain an acidic proton which can be removed by reaction with a base. Suitable bases are, for example, alkali metals, such as lithium, sodium and potassium, alkaline earth metals, such as calcium and magnesium, ammonia and organic amines. Such salts are likewise a subject of the invention.
A hydrocarbon radical is a straight-chain, branched or cyclic, saturated, partly saturated, unsaturated or aromatic radical, e.g. alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, cycloalkynyl or aryl. Combined terms, such as cycloalkylalkenyl, cycloalkynylalkyl and arylalkynyl, are also intended to be included by this definition. If this hydrocarbon radical also additionally contains heteroatoms, these can in principle, i.e. if the chemical structure permits it, be located in any desired position of the hydrocarbon radical. According to the definition, a heteroatom can also function as a connecting atom to the remainder of the molecule. A heteroatom can be present in single- or double-bonded form.
In formula (I) and all subsequent formulae, chain-like carbon-containing radicals such as alkyl, alkoxy, haloalkyl, haloalkoxy, alkylamino and alkylthio and the corresponding unsaturated and/or substituted radicals in the carbon structure such as alkenyl and alkynyl can in each case be straight-chain or branched. If not specifically indicated, in these radicals the lower carbon structures, e.g. having 1 to 6 carbon atoms or, in the case of unsaturated groups, having 2 to 4 carbon atoms, are preferred. Alkyl radicals, even in the combined meanings such as alkoxy, haloalkyl etc., are, for example, methyl, ethyl, n- or i-propyl, n-, i-, t- or 2-butyl, pentyls, hexyls, such as n-hexyl, i-hexyl and 1,3-dimethylbutyl, heptyls, such as n-heptyl, 1-methylhexyl and 1,4-dimethylpentyl; alkenyl and alkynyl radicals have the meaning of the possible unsaturated radicals corresponding to the alkyl radicals; alkenyl is, for example, allyl, 1-methylprop-2-en-1-yl, 2-methylprop-2-en-1-yl, but-2-en-1-yl, but-3-en-1-yl, 1-methylbut-3-en-1-yl and 1-methylbut-2-en-1-yl; alkynyl is, for example, propargyl, but-2-yn-1-yl, but-3-yn-1-yl, 1-methylbut-3-yn-1-yl. The multiple bond can be located in any desired position of the unsaturated radical.
Cycloalkyl is a carbocyclic, saturated ring system having three to eight carbon atoms, e.g. cyclopropyl, cyclopentyl or cyclohexyl. Analogously, cycloalkenyl is a monocyclic alkenyl group having three to eight carbon ring members, e.g. cyclopropenyl, cyclobutenyl, cyclopentenyl and cyclohexenyl, it being possible for the double bond to be located in any desired position. In the case of combined radicals, such as cycloalkylalkenyl, the first-mentioned radical can be located in any desired position of the second-mentioned radical.
In the case of a disubstituted amino group, such as dialkylamino, these two substituents can be identical or different.
Halogen is fluorine, chlorine, bromine or iodine. Haloalkyl, -alkenyl and -alkynyl are alkyl, alkenyl or alkynyl, each of which is partly or completely substituted by halogen, preferably by fluorine, chlorine and/or bromine, in particular by fluorine or chlorine, e.g. CF
3
, CHF
2
, CH
2
F, CF
3
CF
2
, CH
2
FCHCl, CCl
3
, CHCl
2
, CH
2
CH
2
Cl; haloalkoxy is for example, OCF
3
, OCHF
2
, OCH
2
F, CF
3
CF
2
O, OCH
Auler Thomas
Bieringer Hermann
Rosinger Christopher
Van Almsick Andreas
Willms Lothar
Frommer & Lawrence & Haug LLP
Hoechst Schering AgrEvo GmbH
Rao Deepak R.
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