- SUBSTITUTED N-(1,2,4-TRIAZOL-3-YL)ARYLCARBOXAMIDE COMPOUNDS AND THEIR USE AS HERBICIDES
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N-(1,2,4-triazol-3-yl)arylcarboxamides of formula (I) and their use as herbicides. The invention relates to N-(1,2,4-triazol-3-yl)arylcarboxamides of formula (I) and their use as herbicides. In said formula (I), X represents N or CR2, whereas R
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Page/Page column 145; 146
(2015/02/02)
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- Nucleophilic ring-opening of the azole and azine moieties in 6-nitro-1,2,4-triazolo[1,5-a]pyrimidin-7-ones
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The effects of the nature of the nucleophile and the structure of 6-nitrotriazolo[1,5-a]pyrimidinones on the direction of the ring opening were investigated. The triazole ring is opened under the action of strong bases, such as alkoxides or alkalis, to form 2-cyanoaminopyrimidinones and then 2-aminopyrimidinones. The results of the reactions with N-nucleophiles depend on the accessibility of position 5 of the heterocycle. Thus, sterically hindered secondary amines react with 5-methyltriazolopyrimidinones to give 2-guanidinopyrimidinones and then 2-aminopyrimidinones. In the absence of a substituent at position 5, the azine ring is opened to form 4-alkyl-3-amino-1,2,4-triazoles and 3-amino-2-nitroacrylamides. Under the action of primary amines, only the pyrimidine fragment is cleaved.
- Ulomsky,Voronin,Rusinov,Chupakhin
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p. 682 - 688
(2007/10/03)
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