The present invention relates to processes for the purification of montelukast by the preparation of acid addition salts and tert-amylamine salt. The preparation of acid addition salts is very efficient and does not lead to the increase of impurities arising from the dehydration of the tertiary alcohol, such as styrene impurity, while the use of tert-amylamine salt highly reduces the content of styrene impurity and montelukast sulfoxide.
                            本发明涉及通过制备酸加成盐和tert-戊基胺盐的纯化蒙特卢卡斯特的过程。酸加成盐的制备非常高效,不会导致
三级醇脱
水产生的
苯乙烯杂质等杂质的增加,而使用tert-戊基胺盐则高度降低
苯乙烯杂质和蒙特卢卡斯特亚砜的含量。