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.
具有以下式子的4-取代脯氨酸衍生物可以通过将具有以下式子的化合物与具有以下式子的化合物反应而制备得到:
式子1: ##STR1##
其中,R1为烷基、环烷基、芳基或芳基烷基,R1'为烷基、环烷烯基、芳基或芳基烷基,R2为烷基、芳基、芳基烷基或环烷基,R3为氢、烷基、芳基、芳基烷基或环烷基。
其中,化合物1与化合物2反应得到化合物3(一种新的中间体),烷基化该化合物得到化合物4(一种新的中间体),将该化合物转化为化合物5(一种新的中间体),并将该化合物氧化以得到所需的脯氨酸,其具有以下式子:
式子2: ##STR2##
式子3: ##STR3##
式子4: ##STR4##
式子5: ##STR5##
式子6: ##STR6##
式子7: ##STR7##