C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 405/12 (2006.01) C07D 405/14 (2006.01)
Patent
CA 2219617
The invention refers to a process for the production of the form I of the terazosin monohydrochloride anhydrous by heating terazosin suspended in 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 with a methanol solution of hydrochloric acid.
L'invention concerne un procédé pour la production de la forme I du monochlorhydrate de térazosine anhydre par chauffage de térazosine en suspension dans 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, avec une solution méthanolique d'acide chlorhydrique.
Cannata Vincenzo
Ferrario Tiziano
Galbiati Barbara
Alfa Chemicals Italiana S.r.l.
Marks & Clerk
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