申请人:E. R. Squibb & Sons, Inc.
公开号:US04588819A1
公开(公告)日:1986-05-13
4-Substituted proline derivatives having the formula ##STR1## can be prepared by reacting the compound having the formula ##STR2## with a compound having the formula ##STR3## to obtain a compound having the formula ##STR4## (a novel intermediate), alkylating that compound to obtain a compound having the formula ##STR5## (a novel intermediate), converting that compound to a compound having the formula ##STR6## (a novel intermediate), and oxidizing that compound to yield the desired proline having the formula ##STR7## wherein R.sub.1 is alkyl, cycloalkyl, aryl or arylalkyl, R.sub.1 ' is alkyl, cycloalkenyl, aryl or arylalkyl, R.sub.2 is alkyl, aryl, arylalkyl or cycloalkyl and R.sub.3 is hydrogen, alkyl, aryl, arylalkyl or cycloalkyl.
具有以下公式的4-取代脯氨酸衍生物可以通过将具有以下公式的化合物与具有以下公式的化合物反应来制备:获得具有以下公式的化合物(一种新的中间体),烷基化该化合物以获得具有以下公式的化合物(一种新的中间体),将该化合物转化为具有以下公式的化合物(一种新的中间体),然后氧化该化合物以产生具有以下公式的所需脯氨酸,其中R.sub.1为烷基、环烷基、芳基或芳基烷基,R.sub.1'为烷基、环烯烷基、芳基或芳基烷基,R.sub.2为烷基、芳基、芳基烷基或环烷基,R.sub.3为氢、烷基、芳基、芳基烷基或环烷基。