C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 405/12 (2006.01) C07D 405/14 (2006.01)
Patent
CA 2219615
The invention refers to a process for the production of the form I of the terazosin monohydrochloride anhydrous by treating at the boiling temperature terazosin monohydrochloride dihydrate with a mixture made by methanol and by a solvent selected from the alcohols, straight or branched, from C2 to C6, the esters of the carboxylic aliphatic acids from C1 to C8 with the alcohols, straight or branched, from C1 to C8, the aliphatic ketones from C3 to C8, the aliphatic ethers, straight, branched or cyclic, from C4 to C8, the aliphatic amides and the aliphatic nitriles.
L'invention concerne un procédé pour la production de la forme I du monochlorhydrate de térazosine anhydre par traitement à la température d'ébullition du monochlorhydrate de térazosine dihydraté avec un mélange de méthanol et d'un solvant choisi parmi les alcools, linéaires ou ramifiés, de C2 à C6, les esters d'acides carboxyliques aliphatiques de C1 à C8 avec des alcools, linéaires ou ramifiés, de C1 à C8, les cétones aliphatiques de C3 à C8, les éthers aliphatiques, linéaires, ramifiés ou cycliques, de C4 à C8, les amides aliphatiques et les nitriles aliphatiques.
Cannata Vincenzo
Ferrario Tiziano
Galbiati Barbara
Alfa Chemicals Italiana S.r.l.
Marks & Clerk
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