申请人:Sepracor Inc.
公开号:US05925761A1
公开(公告)日:1999-07-20
Processes for preparing compounds having the general formula: ##STR1## wherein R.sup.1a is protected carboxy, carboxy, hydroxymethyl, protected hydroxymethyl, or methyl are disclosed. Processes of the invention begin with a starting material of the general formula II ##STR2## and elaborate the product by reductive amination of an aldehyde of formula IVa ##STR3## with .alpha.,.alpha.-diphenyl-4-piperidinemethanol.
本发明公开了制备具有一般式为:##STR1## 其中R.sup.1a是保护羧基,羧基,羟甲基,保护羟甲基或甲基的化合物的方法。本发明的方法从一般式II的起始物质开始,##STR2## 并通过使用公式IVa的醛与.alpha.,.alpha.-二苯基-4-哌啶甲醇进行还原胺化反应来制备产物。