C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 405/12 (2006.01) A61K 31/505 (2006.01) C07D 405/14 (2006.01)
Patent
CA 2224916
A new crystalline and anhydrous form of doxazosin mesylate is described. The new form is crystalline and anhydrous and is characterised in its X-ray spectrum by the following reflex positions of high and medium intensity: 15.40° 24.15° 16.85° 25.81° 18.06°. Owing to its crystalline properties, the new form of doxazosin mesylate according to the invention has surprising advantages both with regard to its synthesis and for pharmaceutical processing into solid dosage forms. A process for preparing the new form of doxazosin mesylate and medicaments containing the new form of doxazosin mesylate are also described.
Description d'une nouvelle forme cristalline et anhydre de mésylate de doxazosine. Cette nouvelle forme est caractérisée dans son spectre de diffraction des rayons X par les positions de réflexion suivantes d'intensité forte et moyenne : 15,40 degrés, 24,15 degrés, 16,85 degrés, 25,81 degrés, 18,06 degrés. En raison de ses propriétés cristallines, la nouvelle forme de mésylate de doxazosine dévoilée présente des avantages surprenants à la fois à l'égard de sa synthèse et de sa transformation pharmaceutique en formes posologiques solides. Un processus de préparation de la nouvelle forme de mésylate de doxazosine et des médicaments la contenant est également décrit.
Grafe Ingomar
Morsdorf Johann P.
Deeth Williams Wall Llp
Heumann Pharma Gmbh
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