申请人:Abbott Laboratories
公开号:US05932766A1
公开(公告)日:1999-08-03
The present invention discloses a process for the preparation of a compound having formula 4: ##STR1## The process comprises the step of reacting an enolate having the formula: ##STR2## with a Grignard reagent. The enolate salt is formed in situ from the reaction of a protected ester wherein M is an alkali metal. R.sub.6 and R.sub.7 are each hydrogen or are independently selected from ##STR3## wherein R.sub.a and R.sub.b are independently selected from hydrogen, lower alkyl and phenyl and R.sub.c, R.sub.d and R.sub.e are independently selected from hydrogen, lower alkyl, trifluoromethyl, alkoxy, halo and phenyl; and ##STR4## wherein the naphthyl ring is unsubstituted or substituted with one, two or three substitutents independently selected from lower alkyl, trifluoromethyl, alkoxy and halo. Alternatively, R.sub.6 is as defined above and R.sub.7 is R.sub.12 OC(O)-- wherein R.sub.12 is benzyl; or R.sub.6 and R.sub.7 taken together with the nitrogen atom to which they are bonded form ##STR5## wherein R.sub.f, R.sub.g, R.sub.h and R.sub.i are independently selected from hydrogen, lower alkyl, alkoxy, halogen and trifluoromethyl.
本发明公开了一种制备具有式4的化合物的方法:##STR1## 该方法包括将具有以下式的烯醇负离子:##STR2## 与格氏试剂反应的步骤。负离子盐在原位从受保护的酯反应中形成,其中M是碱金属。R.sub.6和R.sub.7分别为氢或独立选择自##STR3## 其中R.sub.a和R.sub.b独立选择自氢、低碳烷基和苯基,R.sub.c、R.sub.d和R.sub.e独立选择自氢、低碳烷基、三氟甲基、烷氧基、卤素和苯基;和##STR4## 其中萘环未取代或独立选择自低碳烷基、三氟甲基、烷氧基和卤素的一个、两个或三个取代基。或者,R.sub.6如上定义,R.sub.7为R.sub.12 OC(O)-,其中R.sub.12为苄基;或者R.sub.6和R.sub.7与它们结合的氮原子一起形成##STR5## 其中R.sub.f、R.sub.g、R.sub.h和R.sub.i独立选择自氢、低碳烷基、烷氧基、卤素和三氟甲基。