Crystal of 2-ethoxy-1-[[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-benzimidazole-7-carboxylic acid and process for producing the same
申请人:Hashimoto Hideo
公开号:US20080182994A1
公开(公告)日:2008-07-31
A process for producing crystals of 2-ethoxy-1-[[2′-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-benzimidazole-7-carboxylic acid (compound (I)), characterized by dissolving or suspending the compound (I) or a salt thereof in a solvent comprising an aprotic polar solvent and crystallizing it. By the process, the contaminants which are contained in the compound (I) or its salt and are difficult to remove, such as tin compounds, analogues of the compound (I), and a residual organic solvent, can be easily removed. Crystals of the compound (I) can be efficiently and easily mass-produced in high yield on an industrial scale.
一种制备2-乙氧基-1-[[2'-(1H-四唑-5-基)联苯-4-基]甲基]-1H-苯并咪唑-7-羧酸晶体(化合物(I))的方法,其特征在于将化合物(I)或其盐溶解或悬浮在包含无水极性溶剂的溶剂中,并结晶。通过该方法,化合物(I)或其盐中难以去除的污染物,如锡化合物,化合物(I)的类似物和残留的有机溶剂,可以轻松去除。化合物(I)的晶体可以在工业规模上高效且容易地大量生产。