The present invention is directed to a process of preparing montelukast or a salt thereof with minimal amounts of impurities, such as a dehydration impurity (compound (VI)) or a cyclic ether impurity (compound (VIII)).
本发明涉及一种制备蒙特卢卡斯特或其盐的方法,该方法可在最小量的杂质存在下进行,例如脱
水杂质(化合物(VI))或
环醚杂质(化合物(VIII))。