Novel potential HIV protease inhibitors are obtained by an enantioconvergent synthesis of mimicking Phe-Pro dipeptides, achieved through the coupling between Boc(L)Phe or Boc(L)Tyr and both enantiomers of syn-2-benzylpyrrolidin-3-ol and their corresponding pyrrolidin-3-one analogs. The stereochemistry and enantiopurity of intermediate 3-hydroxypyrrolidines 5a and 5b are determined through 1H NMR analysis, and through the synthesis and 19F NMR assignments of the corresponding Mosher’s esters 13a and 13b. The enantiopure compounds 5a and 5b are obtained with 100% diastereoselectivity using specific experimental reductive conditions upon Meldrum’s acid derivatives of activated aromatic amino acids.
新型潜在的HIV蛋白酶抑制剂通过模仿苯丙
氨酸-脯
氨酸二肽的镜像收敛合成获得,该合成通过Boc(L)Phe或Boc(L)Tyr与syn-
2-苯基吡咯烷-3-醇的两种对映体及其相应的
吡咯烷-3-
酮类似物之间的耦合实现。中间体
3-羟基吡咯烷 5a 和 5b 的立体
化学和对映体纯度通过1H NMR分析以及对应莫舍酯13a和13b的合成及19F NMR分析进行确认。使用特定的还原实验条件,在活化芳香
氨基酸的梅尔德鲁姆酸衍
生物上获得对映体纯化合物5a和5b,且实现了100%的非对映选择性。