4-trifluoromethylpyrazolyl-substituted pyridines and pyrimidines
AssigneeBayer CropScience AG
InventorsMichael Gerhard Hoffmann, Hendrik Helmke, Lothar Willms, Thomas Auler, Hermann Bieringer, Hubert Menne
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AssigneeBayer CropScience AG
InventorsMichael Gerhard Hoffmann, Hendrik Helmke, Lothar Willms, Thomas Auler, Hermann Bieringer, Hubert Menne
Estimating the term…
A description is given of 4-trifluoromethylpyrazolyl-substituted pyridines and pyrimidines of formula (I) and of their use as herbicides. In this formula (I) R1, R2, R3 and R4 are various radicals, A is an aromatic or heteroaromatic radical, and Z is a nitrogen or carbon atom.
A compound of the formula (I) or an N-oxide or salt thereof,
A compound of the formula (I) or an N-oxide or salt thereof,
A compound of the formula (I) or an N-oxide or salt thereof,
A compound of the formula (I) or an N-oxide or salt thereof,
A compound of the formula (I) or an N-oxide or salt thereof,
Dependencies are inferred from the claim text.
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Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms: containing three…
Having rings with two nitrogen atoms as the only ring hetero atoms: 1,2-Diazoles; Hydrogenated 1,2-diazoles
Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a…:…
Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms:…
Term ended 10 Aug 2023 (estimated)
4-Trifluoromethylpyrazolyl-substituted pyridines and pyrimidines
The invention pertains to the technical field of herbicides, particularly that of herbicides from the class of the heteroaryl-pyrazoles, for selectively controlling broadleaf and gramineous weeds in crops of useful plants.
From a variety of publications it is already known that certain pyridines and pyrimidines substituted by azole radicals, such as pyrazolyl, imidazolyl, and triazolyl, possess herbicidal properties. For instance, WO 99/28301 discloses pyridines and pyrimidines which carry an azole radical in position 2 and, in position 6, an aromatic or heteroaromatic radical attached via a carbon atom. WO 98/40379 describes pyridines and pyrimidines which carry an azole radical in position 2 and, in position 6, an aromatic or heteroaromatic radical attached via an atom from the group consisting of oxygen, nitrogen, and sulfur. The azole radical in position 2 can be substituted by a variety of radicals. That publication discloses various substituents for the pyrazolyl radical, all of which are in position 3. EP-A 1 101 764 describes herbicidal pyridines substituted in position 2 by 3-trifluoromethyl-1-pyrazolyl.
The examples which follow illustrate the invention.
A. Chemical Examples
Preparation of 5-methyl-2-(4-trifluoromethyl-1H-1-pyrazolyl)-4-(5-trifluoromethyl-3-thienyloxy)pyrimidine: