作者:Zurina Shaameri、Sharifah Hidayah Sharif Ali、Mohd Fazli Mohamat、Bohari M. Yamin、Ahmad Sazali Hamzah
DOI:10.1002/jhet.1078
日期:2013.3
A brief and efficient approach for the synthesis of (±)‐5‐benzyl‐4‐hydroxy‐2‐pyrrolidine (1) from phenylalanine racemate is described. The key step is the stereocontrolled reduction of the keto functionality of benzylated pyrrolidinone intermediate (6) via sodium borohydride in carboxylic acid medium furnishing both (R,R)‐ and (S,S)‐configured diastereomers. The natural (R,R) enantiomer (2), however
描述了一种由苯丙氨酸外消旋体合成(±)-5-苄基-4-羟基-2-吡咯烷(1)的简便有效方法。关键步骤是在提供(R,R)和(S,S)构型的非对映异构体的羧酸介质中通过硼氢化钠立体控制降低苄基吡咯烷酮中间体(6)的酮官能度。然而,天然的(R,R)对映异构体(2)从其外消旋混合物中结晶出来。2的结构已通过NMR,IR,元素分析仪和单晶X射线晶体学技术确认。