[EN] PROCESS FOR PREPARATION OF TADALAFIL<br/>[FR] PROCÉDÉ DE PRÉPARATION DE TADALAFIL
申请人:ZAKLADY FARM POLPHARMA SA
公开号:WO2009148341A1
公开(公告)日:2009-12-10
Process for the preparation of tadalafil of high pharmaceutical purity is characterized in that the sequence of reactions comprising acetylation of methyl (1R,3R)-1-(1,3-benzodioxol-5-yl)-2,3,4,9- tetrahydro- 1H-pyrido[3,4-b]indole-3-carboxylate with acetyl chloride and cyclisation of the formed intermediate with methyl amine, is performed as a 'one-pot' process, without isolating the intermediate methyl (1R,3R)-1-(1,3-benzodioxol-5-yl)-2-(chloroacetyl)-2,3,4,9- tetrahydro- 1H-pyrido[3,4-b]indole-3-carboxylate.
高纯度制备他达拉非的工艺过程特点在于,通过甲酰化甲基(1R,3R)-1-(1,3-苯并二氧杂环[5,6]己-5-基)-2,3,4,9-四氢-1H-吡啶并[3,4-b]吲哚-3-羧酸乙酯和乙酰氯,以及将形成的中间体与甲基胺环化的反应序列,以“一锅法”进行,而不分离中间体甲基(1R,3R)-1-(1,3-苯并二氧杂环[5,6]己-5-基)-2-(氯乙酰基)-2,3,4,9-四氢-1H-吡啶并[3,4-b]吲哚-3-羧酸乙酯。