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- W2077989769 abstract "L'acétylacétate d'éthyle et les diamino-3,4 oxo-5 dihydro-4,5 triazines-1,2,4 portant en position 6 un atome d'hydrogène, un méthyle ou un phényle, se condensent a reflux du xylène pour donner par cyclisation compétitive, à coté des dioxo-4,7 méthyl-9 tétrahydro-1,4,6,7 as-triazino[4,3-b]triazépines-1,2,4 obtenues en trés faible proportion, deux produits bicycliques prépondérants: les dioxo-4,9 méthyl-7 tétrahydro-1,4,8,9 as-triazino[4,3-b]triazépines-1,2,4 et les méthyl-2 oxo-7 dihydro-3,7 s-triazolo[3,2-c]triazines-1,2,4. Lors de la condensation de l'acétylacétate d'éthyle et des méthylamino-3 amino-4 oxo-5 dihydro-4,5 triazines-1,2,4,seules les dioxo-4,9 diméthyl-7,10 tétrahydro-4,8,9,10 as-triazino[4,3-b]triazépines-1,2,4 sont obtenues avec de bons rendements. The reaction of 3,4-diamino-5-oxo-4,5-dihydro-l,2,4-triazine or its 6-methyl or 6-phenyl substituted derivatives and ethyl acetoacetate gave three compounds: 4,7-dioxo-9-methyl-1,4,6,7-tetrahydro-as-triazino[4,3-b]-1,2,4-triazepine in poor yield, isomeric 4,9-dioxo-7-methyl-1,4,8,9-tetrahydro-as -triazino[4,3-b]-1,2,4-triazepine and by competitive cyclisation, 2-methyl-7-oxo-3,7-dihydro-s-triazolo[3,2-c]-1,2,4-triazine. By condensation of 3-methylamino-4-amino-5-oxo-4,5-dihydro-1,2,4-triazine with ethyl acetoacetate, the formation of 4,9-dioxo-7,10-dimethyl-4,8,9,10-tetrahydro-as-triazino[4,3-b]-1,2,4-triazepine was strongly favored." @default.
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- W2077989769 title "Recherches en série triazépine-1,2,4: II - Etude de la réaction de l'acétylacétate d'éthyle avec les diamino-3,4 oxo-5 dihydro-4,5 triazines-1,2,4" @default.
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- W2077989769 doi "https://doi.org/10.1002/jhet.5570120603" @default.
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