It is provided a method for obtaining Irbesartan polymorph A, with few synthesis steps, by coupling the intermediate of formula (II) with the compound of formula (III), neutralising one of its alkaline salts in an aqueous medium and recrystallising the crude product obtained. The utilisation of said method obviates protection and deprotection of the tetrazole ring and is therefore of considerable interest for obtaining Irbesartan on a large industrial scale. The invention also refers to the synthesis intermediate of formula (II).
本发明提供了一种获取伊贝
特普利多晶A的方法,该方法步骤少,通过将公式(II)的中间体与公式(III)的化合物偶联,在
水介质中中和其中一种碱性盐并再结晶得到粗品。使用该方法可避免
四唑环的保护和去保护,因此对于大规模工业生产伊贝
特普利非常有利。该发明还涉及公式(II)的合成中间体。