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- W2017495537 abstract "L'acide 2 à été synthétisé suivant la méthode de Hantzsch. La pyrolyse ou la décomposition dans différents solvants donnent la lactone 5, l'imide 6 et le lactame 7. La synthèse des produits 5 et 6 a été accomplie en faisant intervenir des réactions de voisinage. La synthèse de l'acide 3 a été effectuée par addition de méthyl lithium sur l'ester 15. La pyrolyse de cet acide 3 donne entre autres produits l'amide 20. L'ensemble des résultats peut être expliqué par l'interaction entre le groupe acide en C-4 et un des groupes nitriles, suivie de la réduction de la fonction portée en C-4 par la dihydro-1,4 pyridine, puis par des réactions de dismutations. A l'opposé de l'acide 1, aucun pyrrole n'a pu être détecté. The acid 2 was synthesised by the method of Hantzsch. Both pyrolysis of 2, and decomposition in various solvents at reflux, led to lactone 5, imide 6 and lactum 7. Synthesis of 5 and 6 were accomplished by making use of neighbouring group reactions. Synthesis of acid 3 was effected by the reaction of MeLi with ester 15. Pyrolysis of 3 gave, among other products, the imide 20. These results are explained by interaction between the carboxyl group at C-4 and one of the nitrile groups, and then reductions of the function at C4 by the dihydro-1,4-pyridine, followed by a disproportionation reaction. In contrast with acid 1, no pyrrole could be detected among the products from acid 3." @default.
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- W2017495537 title "Transformation de l'acide diméthyl-2,6 dicyano-3,5 dihydro-1,4 pyridine carboxylique—IV" @default.
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