Process for preparing imidazobenzodiazepins and their salts

C - Chemistry – Metallurgy – 07 – D

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260/239.4

C07D 487/04 (2006.01)

Patent

CA 1175823

PRECIS DE LA DIVULGATION: L'invention concerne un procédé pour préparer les produits (I): Image (I) où R1 est hydrogène, halogène, nitro, CF3, R2 est hydrogène, halogène, R3 et R4 forment un 4-alcoyl pipérazin-1-yl, 4- cycloalcoylalcoyl-pipérazin-1-yl, 4-phényl pipérazin-1-yl, pipéridino, ainsi que leurs sels avec les acides, procédé essentiellement caractérisé en ce que l'on traite un produit (II): Image (II) par une amine (III): Image (III) et, le cas échéant, salifie. Le procédé de l'invention per- met d'obtenir les produits de formule (I) qui possèdent d'intéressantes propriétés sédatives, hypnotiques, anxiolyti- ques, tranquillisantes, anticonvulsivantes et myorelaxantes, en un nombre de stades inférieur à celui de l'art antérieur.

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