The invention relates to a improved process for the preparation of Losartan and its potassium salt, which comprises: (i) reacting bromo OTBN with BCFI in the presence of a base and a phase transfer catalyst to produce a cyano aldehyde; reacting the formed cyano aldehyde with sodium azide in the presence of tributyl tin chloride to produce aldehyde tetrazole; reducing the formed aldehyde tetrazole with sodium borohydride to produce Losartan; and, if desired, converting the formed Losartan to its potassium salt by known method.
这项发明涉及一种改进的制备洛卡
特普及其
钾盐的方法,包括:(i) 在碱和相转移催化剂的存在下,将
溴代
OTBN与
BCFI反应以产生
氰基醛;将形成的
氰基醛与
叠氮化
钠在三
丁基锡氯化物存在下反应以产生醛
四唑;用
硼氢化钠还原形成的醛
四唑以产生洛卡
特普;如有需要,通过已知方法将形成的洛卡
特普转化为其
钾盐。