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US 4,057,416 AGranted
3-Alkylthio-, 3-alkylsulfinyl-, and 3-alkylsulfonylisothiazole derivatives as herbicides
AssigneeFMC Corporation
InventorLoren Kenneth Gibbons
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Abstract
A new class of herbicidal compounds consisting of 1-alkyl- and 1,1-dialkyl-3-(3,4-substituted-5-isothiazolyl)ureas and N-(3,4-substituted-5-isothiazolyl)-alkanamides in which the 3-substituent consists of alkylthio, alkylsulfinyl, and alkylsulfonyl, and the 4-substituent consists of cyano, and carbamoyl, exhibits preemergence and postemergence herbicidal activity, controlling effectively the growth of a wide spectrum of grassy and broad-leaved plant species. The synthesis of members of this class is described in detail, and the utility of representative compounds is exemplified.
Claims19
A substituted isothiazole of the formula:
- ##STR3## wherein R.sub.1 is alkyl or alkenyl of up to six carbon atoms;
- Z is --NR.sub.2 R.sub.3 or R.sub.4 in which R.sub.2 is methyl, R.sub.3 is methyl or hydrogen, and R.sub.4 is alkyl of one to six carbon atoms;
- M is cyano or carbamoyl;
- and X is ----, --SO--, or --SO.sub.2 --.
1 more element
Dependencies are inferred from the claim text.