- CRYSTALLINE FORMS OF N-(5,7-DIMETHOXY-[1,2,4]TRIAZOLO[1,5-A]PYRIMIDIN-2-YL)-2-METHOXY-4-(TRIFLUOROMETHYL)PYRIDINE-3-SULFONAMIDE
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The present invention relates to novel crystalline forms of N-(5,7-dimethoxy- [1,2,4]triazolo[1,5-a]pyrimidin-2-yl)-2-methoxy-4-(trifluoromethyl)pyridine-3-sulfonamide (pyroxsulam) A-G, to processes for their preparation, mixtures and compositions comprising them and to the methods of using said crystals and said compositions as pesticidal agents for treating crops and plants.
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Page/Page column 16-19
(2020/10/09)
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- A dingding sulphur grass amine preparation method (by machine translation)
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The invention provides a method for preparing dingding sulphur grass amine, belongs to herbicide preparation technical field. By dingding sulphur grass amine 2 - amino - 5, 7 - dimethoxy [1, 2, 4] triazolo [1, 5 - a] pyrimidine in the organic solvent and 2 - methoxy - 4 - (trifluoromethyl) - pyridine - 3 - sulfonyl chloride in the presence of organic base condensation under the reaction conditions. The condensation reaction is 4 - dimethylamino pyridine carried out under catalysis. The present invention provides a method for preparing dingding sulphur grass amine of higher yield, simple operation, high safety, and is suitable for industrial production. (by machine translation)
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Paragraph 0015-0016; 017
(2019/01/06)
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- Application of the tisler triazolopyrimidine cyclization to the synthesis of a crop protection agent and an intermediate
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A new synthetic route to the Dow AgroSciences early stage sulfonamide herbicide 3-(2-methoxy-4-trifluoromethyl)-N-(5,7-dimethoxy[1,2,4]triazolo[1,5-a] pyrimidin-2-yl)pyridinesulfonamide (pyroxsulam) has been developed. The synthesis is based on formation of the triazole ring as the final step, utilizing the Tisler triazolopyrimidine cyclization. A Tisler cyclization route to 2-amino-5,7-dimethoxy-1,2,4-trazolo[1,5-a]pyrimidine starting with 2-chloro-4,6-dimethoxypyrimidine has also been demonstrated.
- Bell, Bruce M.,Fanwick, Phillip E.,Graupner, Paul R.,Roth, Gary A.
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p. 1167 - 1171
(2012/12/23)
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- Process for the preparation of N-([1,2,4]triazolopyrimidin-2-yl)aryl sulfonamides
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The N-arylsulfilimine-catalyzed coupling of aromatic sulfonyl chlorides with N-([1,2,4]triazolopyrimidin-2-yl)amines to form N-([1,2,4]triazolo-pyrimidin-2-yl)aryl sulfonamides is improved by the selection of 3-picoline or 3,5-lutidine as the base.
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Page/Page column 5
(2008/06/13)
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