申请人:Abbott Laboratories
公开号:US05229518A1
公开(公告)日:1993-07-20
The present invention relates to intermediates useful in the process for the preparation of a compound of the formula: ##STR1## wherein R.sub.2a is hydrogen or loweralkyl, R.sub.2b is hydrogen, loweralkyl, cycloalkyl or phenyl and R.sub.1 is loweralkyl, cycloalky, cycloalkylalkyl, phenyl or benzyl. These intermediates are compounds of the formula: ##STR2## wherein R.sub.1, R.sub.2a and R.sub.2b are defined as above.
本发明涉及在制备以下化合物的过程中有用的中间体:##STR1## 其中R.sub.2a是氢或较低的烷基,R.sub.2b是氢、较低的烷基、环烷基或苯基,R.sub.1是较低的烷基、环烷基、环烷基烷基、苯基或苄基。这些中间体是以下化合物的化合物:##STR2## 其中R.sub.1、R.sub.2a和R.sub.2b如上所定义。