[EN] A METHOD OF PREPARING 2-ETHOXY-1-((2'-(5-OXO-4,5-DIHYDRO-1,2,4-OXADIAZOL-3-YL)BIPHENYL- 4-YL)METHYL)-1H-BENZO[D]IMIDAZOLE-7-CARBOXYLATES AND CONVERSION THEREOF TO AZILSARTAN<br/>[FR] PROCÉDÉ DE PRÉPARATION DE 2-ÉTHOXY-1-((2'-(5-OXO-4,5-DIHYDRO-1,2,4-OXADIAZOL-3-YL)BIPHÉNYL- 4-YL)MÉTHYL)-1H-BENZO[D]IMIDAZOLE-7-CARBOXYLATES ET LEUR CONVERSION EN AZILSARTAN
申请人:ZENTIVA KS
公开号:WO2012139536A1
公开(公告)日:2012-10-18
A method of preparing alkyl 2-ethoxy-1-((2'-(5-oxo-4,5-dihydro- 1,2,4-oxadiazol-3- yl)biphenyl-4-yl)methyl)-1H-benzo[d]imidazole-7-carboxylates of the general formula I, wherein R is either a branched or unbranched C1-C4 alkyl, ArCH2, Ar2CH, or Ar3C, wherein Ar is a substituted or unsubstituted phenyl, in which an alkyl 2-ethoxy-1 -((2'- ((hydroxyamino)iminomethyl)biphenyl-4-yl)methyl)- 1H-benzo[d]imidazole-7-carboxylate of the general formula V is reacted with a cyclization agent in a solvent in the presence of suitable bases. (I) (V)
将通用公式I中的烷基2-乙氧基-1-((2'-(5-氧代-4,5-二氢-1,2,4-噁二唑-3-基)联苯-4-基)甲基)-1H-苯并[d]咪唑-7-羧酸酯制备方法,其中R为支链或直链C1-C4烷基,ArCH2,Ar2CH或Ar3C,其中Ar为取代或未取代苯基,在溶剂中在适当碱的存在下,将通用公式V中的烷基2-乙氧基-1-((2'-((羟胺基)亚胺基)联苯-4-基)甲基)-1H-苯并[d]咪唑-7-羧酸酯与缩合剂反应。