Preparation process of hydroxy-4 quinoleins

C - Chemistry – Metallurgy – 07 – D

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260/289.8

C07D 215/22 (2006.01) C07D 215/233 (2006.01)

Patent

CA 1193262

PRECIS DE LA DIVULGATION: L 'invention concerne un procédé de préparation d'hydroxy-4 quinoléines de formule générale (I): Image (I) dans laquelle R représente un atome d'hydrogène ou 1 à 3 substituants identiques ou différents choisis parmi les atomes d'halogène, les radicaux alcoyles contenant 1 à 4 atomes de carbone, alcoyloxyles dont la partie alcoyle contient 1 à 4 atomes de carbone ou trifluorométhyle en position 2, 3, 5, 6, 7 ou 8; par oxydation, en milieu basique, sous pression, au moyen d'un excès d'oxygène ou d'air, d'une tétrahydro-1,2,3,4 quinolinone-4 de formule (II): Image (II) dans laquelle R est défini comme précédemment.

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