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US 4,226,609 AGranted
Selected 3-trichloromethyl-5-cyclic amine-1,2,4-thiadiazole compounds and their use as ammonium nitrification inhibitors
AssigneeOlin Corporation
InventorsLawrence E. Katz, Walter A. Gay, Hansjuergen A. Schroeder
Life of this patent
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Abstract
Disclosed are selected 3-trichloromethyl-5-cyclic amine-1,2,4-thiadiazole compounds. These compounds can be applied to or spread upon soil by themselves or in inert carriers or with nitrogen-containing fertilizers to inhibit ammonium nitrification in the soil.
Claims36
A 3-trichloromethyl-5-cyclic amine-1,2,4-thiadiazole compound of the formula:
- ##STR16## wherein ##STR17## is either a 3, 4, 5, 6 or 7 membered saturated heterocyclic ring containing 1 to 3 hetero ring atoms;
- wherein Z comprises 2-6 carbon atoms and 0-2 hetero atoms, said hetero atoms being either nitrogen, oxygen or sulfur;
- and wherein the ring substituents R.sub.1 are selected from the group consisting of hydrogen, hydroxy, nitro, cyano, halo, alkyl, haloalkyl, amino, alkylamino, dialkylamine and alkoxy groups.
A method for inhibiting the nitrification of ammonium-nitrogen in soil which comprises treating the soil with an effective nitrification-inhibiting amount of one or more nitrification-inhibiting compounds having the formula:
- ##STR25## wherein ##STR26## is either a 3, 4, 5, 6 or 7 membered saturated heterocyclic ring containing 1 to 3 hetero ring atoms;
- wherein Z comprises 2-6 carbon atoms and 0-2 hetero atoms, said hetero atoms being either nitrogen, oxygen, or sulfur;
- and wherein the ring substituents R.sub.1 are selected from the group consisting of hydrogen, hydroxy, nitro, cyano, halo, alkyl, haloalkyl, amino, alkylamino, dialkylamino and alkoxy groups.
Dependencies are inferred from the claim text.