The present invention relates to a method for preparing Montelukast acid or its sodium salt by reacting a thiol compound with a Montelukast intermediate in the presence of a base in a medium comprising an ionic liquid compound. In accordance with the inventive method, highly pure Montelukast acid or its sodium salt, which is advantageously used as a raw material in the preparation of Montelukast, a leukotriene antagonist, can be easily prepared in a high yield.
本发明涉及一种通过在含有
离子液体化合物的介质中,在碱的存在下,将
硫醇化合物与Montelukast中间体反应,制备Montelukast酸或其钠盐的方法。根据这一创新方法,可以轻松高产地制备高纯度的Montelukast酸或其钠盐,这在制备Montelukast,一种
白三烯拮抗剂的原料中具有优势。