[EN] AN IMPROVED PROCESS FOR THE PREPARATION OF ALFUZOSIN AND ITS NOVEL POLYMORPH [FR] PROCÉDÉ AMÉLIORÉ POUR LA PRÉPARATION D'ALFUZOSINE ET DE SON NOUVEAU POLYMORPHE
The present invention relates to a simple process for the preparation of alfuzosin, it's bases and its pharmaceutically acceptable salts thereof.
本发明涉及一种用于制备奥法唑嗪及其碱和其药用可接受盐的简单工艺。
Process for the Preparation of Alfuzosin Hydrochloride
申请人:Kankan Rajendra Narayanrao
公开号:US20100256370A1
公开(公告)日:2010-10-07
A process for preparing alfuzosin or a salt thereof comprising: (a) condensing 4-amino-2-chloro-6,7-dimethoxyquinazoline with 3-methylaminopropionitrile in the presence of a polar aprotic solvent selected from the group consisting of diglyme, dimethyl formamide, t-butanol, hexamethylphosphoramide or mixtures thereof to form N-(4-amino-6,7-dimethoxyquinazol-2-yl)-N-methyl-2-cyanoethylamine (b) hydrogenating the N-(4-amino-6,7-dimethoxyquinazol-2-yl)-N-methyl-2-cyanoethylamine using a hydrogenating agent under a pressure of less than 10 kg/cm
2
to form N-(4-amino-6,7-dimethoxyquinazol-2-yl)-N-methylpropylenediamine and optionally converting the N-(4-amino-6,7-dimethoxyquinazol-2-yl)-N-methylpropylenediamine to an acid addition salt thereof; and (c) converting tetrahydrofuroic acid to an intermediate form and condensing the intermediate form with the N-(4-amino-6,7-dimethoxyquinazol-2-yl)-N-methylpropylenediamine or with the acid addition salt to yield alfuzosin base, and optionally converting alfuzosin base to a salt of alfuzosin.
[EN] CRYSTALLINE ALFUZOSIN BASE<br/>[FR] BASE D'ALFUZOSINE CRISTALLINE
申请人:HETERO DRUGS LTD
公开号:WO2006030449A1
公开(公告)日:2006-03-23
The present invention relates to crystalline alfuzosin base and processes for preparation of the said crystalline solid. Thus, for example, alfuzosin base (HPLC purity: 97%) is added to methanol and heated to reflux to form a clear solution, the solution is cooled to 25° - 30°C and stirred for 12 hours at the same temperature, the resulting solution is cooled to 10°- 15°C and stirred for 2 hours, and the resulting solid is filtered, washed with methanol and dried at 50°- 60°C for 4 hours to give 99.95% pure alfuzosin base.
The invention relates to processes for the preparation of alfuzosin or pharmaceutically acceptable salts thereof in high purity. More particularly, it relates to the preparation of pure crystalline alfuzosin base. The invention also relates to pharmaceutical compositions that include the pure alfuzosin or a pharmaceutically acceptable salt thereof.
The present invention relates to crystalline alfuzosin base and processes for preparation of the said crystalline solid. Thus, for example, alfuzosin base (HPLC purity: 97%) is added to methanol and heated to reflux to form a clear solution, the solution is cooled to 25-30° C. and stirred for 12 hours at the same temperature, the resulting solution is cooled to 10-15° C. and stirred for 2 hours, and the resulting solid is filtered, washed with methanol and dried at 50-60° C. for 4 hours to give 99.95% pure alfuzosin base.