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得
厄贝沙坦多晶形A的方法,该方法具有少量合成步骤,通过将公式(II)的中间体与公式(III)的化合物耦合,在
水介质中中和其碱性盐之一,并重新结晶得到粗产品。使用该方法可避免对
四唑环的保护和去保护,因此在大规模工业生产中获得
厄贝沙坦具有相当的兴趣。该发明还涉及公式(II)的合成中间体。