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.
制备奥扎唑星或其盐的方法包括:(a)在极性无水溶剂的存在下,将4-氨基-2-氯-6,7-二甲氧基喹唑啉与3-甲基氨基丙腈缩合,所述极性无水溶剂选自二甘醚、二甲基甲酰胺、叔丁醇、六甲基磷酰胺或其混合物,形成N-(4-氨基-6,7-二甲氧基喹唑啉-2-基)-N-甲基-2-氰乙胺;(b)使用氢化剂在小于10千克/平方厘米的压力下氢化N-(4-氨基-6,7-二甲氧基喹唑啉-2-基)-N-甲基-2-氰乙胺,形成N-(4-氨基-6,7-二甲氧基喹唑啉-2-基)-N-甲基丙二胺,并可选择将N-(4-氨基-6,7-二甲氧基喹唑啉-2-基)-N-甲基丙二胺转化为其酸加合盐;(c)将四氢呋喃酸转化为中间体形式,将中间体形式与N-(4-氨基-6,7-二甲氧基喹唑啉-2-基)-N-甲基丙二胺或与酸加合盐缩合,得到奥扎唑星原料,可选择将奥扎唑星原料转化为奥扎唑星的盐。