Preparation of angiotensin receptor blockers or pharmaceutically acceptable salts thereof
申请人:Jubilant Generics Limited
公开号:US11327065B1
公开(公告)日:2022-05-10
The present invention relates to a process for the preparation of angiotensin receptor blockers or its pharmaceutically acceptable salts thereof containing less than 10 ppm of the azido impurities. More particularly, the present invention relates to process for the preparation of Losartan, Losartan potassium of Formula I or its other pharmaceutically acceptable salts thereof containing less than 10 ppm of each of the azido impurities, wherein the azido impurity is selected from the group comprising of 5-(4′-(azidomethyl)-[1,1′-biphenyl]-2-yl)-1H-tetrazole, 4′-(azidomethyl)-[1,1′-biphenyl]-2-carbonitrile, 4′-((5-(azidomethyl)-2-butyl-4-chloro-1H-imidazol-1-yl)methyl)-[1,1′-biphenyl]-2-carbonitrile, 5-(4′-((5-(azidomethyl)-2-butyl-4-chloro-1H-imidazol-1-yl)methyl)-[1,1′-biphenyl]-2-yl)-1H-tetrazole, 5-(azidomethyl)-2-butyl-4-chloro-1H-imidazole, 4′-((4-(azidomethyl)-2-butyl-5-chloro-1H-imidazol-1-yl)methyl)-[1,1′-biphenyl]-2-carbonitrile, 5-(4′-((4-(azidomethyl)-2-butyl-5-chloro-1H-imidazol-1-yl)methyl)-[1,1′-biphenyl]-2-yl)-1H-tetrazole and 1-((1-((2′-(1H-tetrazol-5-yl)-[1,1′-biphenyl]-4-yl)methyl)-2-butyl-4-chloro-1H-imidazol-5-yl)methyl)-5-(4′-((5-(azidomethyl)-2-butyl-4-chloro-1H-imidazol-1-yl)methyl)-[1,1′-biphenyl]-2-yl)-1H-tetrazole. More particularly, the present invention relates to a simple, economical and industrially efficient process for the preparation of Losartan potassium of Formula I.
本发明涉及一种制备血管紧张素受体拮抗剂或其药用盐的方法,所述药用盐中含有少于10ppm的叠氮杂质。更具体地说,本发明涉及一种制备洛萨霉素、洛萨霉素钾(如I式所示)或其他其药用盐的方法,所述盐中含有少于10ppm的每种叠氮杂质,其中所述叠氮杂质选自下组:5-(4'-叠氮基甲基-[1,1'-联苯]-2-基)-1H-四氮唑,4'-叠氮基甲基-[1,1'-联苯]-2-腈,4'-((5-叠氮基甲基-2-丁基-4-氯-1H-咪唑-1-基)甲基)-[1,1'-联苯]-2-腈,5-(4'-((5-叠氮基甲基-2-丁基-4-氯-1H-咪唑-1-基)甲基)-[1,1'-联苯]-2-基)-1H-四氮唑,5-叠氮基甲基-2-丁基-4-氯-1H-咪唑,4'-((4-叠氮基甲基-2-丁基-5-氯-1H-咪唑-1-基)甲基)-[1,1'-联苯]-2-腈,5-(4'-((4-叠氮基甲基-2-丁基-5-氯-1H-咪唑-1-基)甲基)-[1,1'-联苯]-2-基)-1H-四氮唑,以及1-((1-((2'- (1H-四氮唑-5-基)-[1,1'-联苯]-4-基)甲基)-2-丁基-4-氯-1H-咪唑-5-基)甲基)-5-(4'-((5-叠氮基甲基-2-丁基-4-氯-1H-咪唑-1-基)甲基)-[1,1'-联苯]-2-基)-1H-四氮唑。更具体地说,本发明涉及一种简单、经济且工业上高效制备I式所示的洛萨霉素钾的方法。