[EN] AN IMPROVED PROCESS FOR THE PREPARATION OF TERBINAFINE HYDROCHLORIDE<br/>[FR] PROCEDE AMELIORE DE PREPARATION DE CHLORHYDRATE DE TERBINAFINE
申请人:HYDEX CHEMICALS PVT LTD
公开号:WO2005110968A1
公开(公告)日:2005-11-24
The present invention relates to an improved process for preparation of terbinafine hydrochloride ,which is (E) - N- Methyl -N-(1-Naphtylmethyl)-6,6-dimethylhept-2-ene-4-ynyl-1-amine has the formula (I), which comprises reacting t-butylacetylene with ethylmagnesium bromide in THF (ii) adding acrolein at a temperature in the range of 0-10o C to get , 6,6-dimethyl-hept-1-ene-4-yne-3-ol, (iii) reacting it with a mixture of phosphorous oxychloride and hydrochloric acid in methanol (iv) extracting the reaction mass with aliphatic/aromatic solvent & removing the solvent (v) reacting the residue with N-(1-naphtylmethyl)methyl amine in the presence of a base to give Terbinafine (vi) adding hydrochloric acid and extracting the Terbinafine Hcl formed with a chlorinated solvent and (vii) recovering the chlorinated solvent under vacuum and adding ethylacetate to separate Terninafine hydrochloride which is filtered and dried.
本发明涉及一种改进的制备盐酸特比萘芬的方法,其为(E)-N-甲基-N-(1-萘甲基)-6,6-二甲基庚-2-烯-4-炔基-1-胺,化学式为(I),包括以下步骤:(i)将叔丁基乙炔与溴化乙基镁在THF中反应,(ii)在0-10摄氏度范围内加入丙烯醛以得到6,6-二甲基庚-1-烯-4-炔-3-醇,(iii)将其与磷氧氯化物和盐酸的混合物在甲醇中反应,(iv)用脂肪/芳香溶剂提取反应混合物并去除溶剂,(v)在碱的存在下将残渣与N-(1-萘甲基)甲基胺反应以得到特比萘芬,(vi)加入盐酸并用氯化溶剂提取形成的盐酸特比萘芬,(vii)在真空下回收氯化溶剂并加入乙酸乙酯以分离特比萘芬盐酸盐,然后过滤和干燥。