申请人:Council of Scientific and
Industrial Research
公开号:EP1407773A1
公开(公告)日:2004-04-14
Described herein is a process for the preparation of S(-)Amlodipine salts which comprises reaction of S(-)Amlodipine base with a solution of pharmaceutically acceptable acid such as benzene sulfonic acid, oxalic acid, maleic acid, succinic acid and p-toluene sulfonic acid. The reaction is carried out in the presence of an organic solvent at room temperature. The organic solvents include alcohols like ethanol, methanol, 2-propanol, hydrocarbons like toluene and polar solvents like dimethyl sulfoxide. The salt is obtained by addition of water and isolation of the salt formed by filtration. The unique feature of the invention is production of S(-) Amlodipine besylate in good chemical yield, high enantiomeric purity and with the quality required for preparation of pharmaceutical composition i.e. tablet formulation.
本文描述了一种制备S(-)氨氯地平盐的过程,包括将S(-)氨氯地平碱与苯磺酸、草酸、马来酸、琥珀酸和对甲苯磺酸等药用可接受的酸溶液反应。该反应在有机溶剂存在下在室温下进行。有机溶剂包括乙醇、甲醇、2-丙醇等醇类、甲苯等烃类和二甲基亚砜等极性溶剂。通过加水并通过过滤分离形成的盐来获得盐。该发明的独特特点是以良好的化学产率、高对映纯度和制备制药组合物(如片剂配方)所需的质量生产S(-)氨氯地平苯甲酸盐。