Process for the manufacture of a polymorph of anhydrous...

Details Process for the manufacture of a polymorph of anhydrous... Process for the manufacture of a polymorph of anhydrous...

C - Chemistry, Metallurgy

07

D

C07D 405/14 (2006.01)

Patent

CA 2173407

A process for making anhydrous Terazosin Hydrochloride comprising the steps of: (a) suspending Terazosin base in n-butanol; (b) adding concentrated aqueous HCl, 1 molar equivalent per molar equivalent of Terazosin base; (c) heating the suspension to a temperature between about 40°C to about 70°C; and (d) cooling the mixture and recovering the desired anhydrous Terazosin Hydrochloride.

Procédé de fabrication de chlorhydrate de térazosine anhydre comprenant les étapes suivantes : (a) mise en suspension de base de térazosine dans du n-butanol; (b) addition de HCl concentré aqueux, à raison de 1 équivalent molaire par équivalent molaire de base de térazosine ; (c) chauffage de la suspension à une température variant entre environ 40 degrés C et environ 70 degrés C; et (d) refroidissement du mélange et récupération du chlorhydrate de térazosine anhydre recherché.

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