Process for the preparation of novel derivatives of...

C - Chemistry – Metallurgy – 07 – D

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260/244.7

C07D 498/06 (2006.01) C07D 209/90 (2006.01)

Patent

CA 1209573

PRECIS DE LA DIVULGATION: La présente invention concerne un procédé pour préparer de nouveaux dérivés de formule (I) et leurs sels d'acides pharmaceutiquement acceptables Image où R est hydrogène, alcoyle (1-4 carbones), R1 est hydro- gène, chlore ou brome, R2 est hydrogène, alcoyle (1-4 carbones), aralcoyle (7-12 carbones), cycloalcoylalcoyle (4-7 carbones), R3 est hydroxyméthyle, alcoylthiométhyle, cyanométhyle, carboxy éventuellement estérifié par un alcool aliphatique (1-5 carbones) ou amidifié par H-NR4R5, ou R4 est hydrogène ou alcoyle (1-4 carbones) et R5 est alcoyle (1-4 carbones), ou R4 et R5 forment un hétérocycle. Les dérivés (I) et leurs sels pharmaceutiquement accepta- bles sont utiles comme médicaments, notamment agonistes dopaminergiques, inhibiteurs de sécrétion de prolactine, sérotoninergiques, antihypertenseurs et, pour certains, vasodilatateurs.

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