申请人:Chinoin Gyogyszer- Es Vegyeszeti Termekek Gyara Rt.
公开号:US04820838A1
公开(公告)日:1989-04-11
The invention relates to a process for the preparation of a new crystalline monohydrate of 1-(3', 4'-diethoxy-benzyl-6, 7-diethoxy-3,4-dihydro-isoquinolinium-theophylline-7-acetate and if desired of pure 1-(3', 4'-diethoxy-benzyl)-6,7-diethoxy-3, 4-dihydro-isoquinolinium-theophylline-7-acetate free of contaminating oxidation products which comprises reacting 1-(3',4'-diethoxy-benzyl)-6,7-diethoxy-3,4-dihydro-isoquinolinium with theophylline-7-acetate acid in the presence of water and one or more organic solvent(s) and if desired dehydrating the 1-(3',4'-diethoxy-benzyl) 6,7-diethoxy-3,4-dihydro-isoquinolinium-theophyl line-7-acetate-monohydrate thus obtained.
本发明涉及一种制备1-(3',4'-二乙氧基苯基)-6,7-二乙氧基-3,4-二氢异喹啉基茶碱-7-醋酸盐的新晶体单水合物的方法,如果需要,还包括制备不含污染氧化产物的纯1-(3',4'-二乙氧基苯基)-6,7-二乙氧基-3,4-二氢异喹啉基茶碱-7-醋酸盐。该方法包括在水和一个或多个有机溶剂的存在下,将1-(3',4'-二乙氧基苯基)-6,7-二乙氧基-3,4-二氢异喹啉基与茶碱-7-醋酸盐酸反应,如果需要,还包括脱水制备所得的1-(3',4'-二乙氧基苯基)-6,7-二乙氧基-3,4-二氢异喹啉基茶碱-7-醋酸盐单水合物。