The invention provides a method for obtaining the intermediate (II), useful for manufacturing Valsartan and a drug directed to a treatment of arterial hypertension or heart failure. The process comprises a) Imination of the aldehyde group of a compound (VII) by L-Valine (IV) salts with organic or inorganic bases and a polar solvent or water, where X means halogen or an —OSO2R group, where R is CF3, tolyl, methyl or F; to give an imine-type compound (VIII), where B+ is the protonated form of an organic base or an alkaline cation; b) Reduction of the imine group of the compound (VIII) followed by acidification, to give the compound (VI); and c) N-Acylation of the compound (VI) with valeryl chloride to give the compound (II). Steps a) and b) can be performed in a “one pot” reaction.
本发明提供了一种获得中间体(II)的方法,该中间体对于制造
缬沙坦和用于治疗动脉高血压或心力衰竭的药物很有用。该过程包括a) 用有机或
无机碱和极性溶剂或
水的
L-缬氨酸(IV)盐使化合物(VII)的醛基发生
亚胺化反应,其中X表示卤素或—OSO2R基团,其中R为
CF3、
甲苯基、甲基或F;以得到
亚胺型化合物(VIII),其中B+是有机碱或碱性阳离子的质子化形式;b) 还原化合物(VIII)的
亚胺基团,然后酸化,以得到化合物(VI);和c) 用
戊酰氯对化合物(VI)进行N-酰化反应,以得到化合物(II)。步骤a)和b)可以在“一锅法”反应中完成。