The present invention is a process for the preparation of diphenylazetidinone derivatives of the formula (I) or forms thereof comprising the substituents X, R
1
and/or R
2
as defined herein. More specifically, the invention comprises methods for the preparation of these compounds by cyclization of certain □-amino carboxamides or □-amino carboxylic esters. These diphenylazetidinone compounds are useful in the treatment of high blood serum cholesterol levels and the maintenance of the reduced cholesterol levels achieved thereby.
本发明涉及一种制备式(I)的二苯基氮代氮杂环
丙酮衍
生物或其形式的方法,其中含有此处定义的取代基X、R1和/或R2。更具体地,本发明涉及通过某些□-
氨基羧酰胺或□-
氨基
羧酸酯的环化制备这些化合物的方法。这些二苯基氮代氮杂环
丙酮化合物在治疗高血清
胆固醇水平和维持由此达到的降低
胆固醇水平方面是有用的。