1,3,4-thiadiazoles useful as herbicides
AssigneeFBC Limited
InventorGraham P. Jones
Life of this patent
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Abstract
Herbicidal thiadiazolyloxyacetamides of the formula: ##STR1## wherein: R is an optionally-substituted alkyl, cycloalkyl or aryl group; R.sup.1 and R.sup.2, which may be the same or different, each represent hydrogen, alkyl, cycloalkyl, alkoxy, alkenyl, aryl, aralkyl or aryloxy, any alkyl or aryl moiety thereof being optionally substituted; or R.sup.1 and R.sup.2, together with the nitrogen atom to which they are attached, represent a heterocyclic or benzheterocyclic group, the hetrocyclic ring of which is 5- or 6-membered, and which may be substituted by one or more alkyl groups; and X is oxygen, sulphur or --S(O).sub.n --where n is 1 or 2, process for their preparation, and compositions containing them.
Claims14
A thiadiazolyloxyacetamide of the formula:
- ##STR6## wherein:
- R is alkyl of 1 to 8 carbon atoms, cycloalkyl of 3 to 7 carbon atoms, or phenyl which is unsubstituted or substituted by one or two halogen atoms or alkyl or alkoxy groups of 1 to 4 carbon atoms;
- R.sup.1 and R.sup.2, which may be the same or different, each represent hydrogen, alkyl of 1 to 8 carbon atoms, cycloalkyl of 3 to 7 carbon atoms, alkenyl of 2 to 6 carbon atoms, benzyl, or phenyl which is unsubstituted or substituted by one or two halogen atoms, nitro groups, or alkyl or alkoxy groups of 1 to 4 carbon atoms;
- or R.sup.1 and R.sup.2 are linked to form a 5- or 6-membered saturated carbon chain and which is unsubstituted or substituted by one or two alkyl groups of 1 to 4 carbon atoms;
- and X is oxygen, sulphur, or --S(O).sub.n -- where n is 1 or 2.
A thiadiazolyloxyacetamide selected from:
- 1-[5-[difluoro(isopropylthio)methyl]-1,3,4-thiadiazol-2-yloxyacetyl]-2-ethy lpiperidine;
- N,N-diallyl-2-[5-[difluoro(phenoxy)methyl]-1,3,4-thiadiazol-2-yloxy]acetami de;
- 2-[5-(ethylthio)difluoromethyl]-1,3,4-thiadiazol-2-yloxy]-N-methylacetanili de;
- N,N-diallyl-2-[5-[t-butylthiodifluoromethyl]-1,3,4-thiadiazol-2-yloxy]aceta mide;
- 2-[5-(ethylthio)difluoromethyl]-3'-fluoro-1,3,4-thiadiazol-2-yloxy]-N-methy lacetanilide;
- and
- 2'-chloro-2-[5-[difluoro(phenoxy)methyl]-1,3,4-thiadiazol-2-yloxy]-N-methyl acetanilide.
Dependencies are inferred from the claim text.