Highly efficient enantioselective synthesis of 1,3-disubstituted 2,5-diketopiperazine derivatives via microwave irradiation
作者:Si Yeon Han、Young-Dae Gong
DOI:10.1080/00397911.2019.1671983
日期:2019.12.17
Abstract Chiral 2,5-diketopiperazine (2,5-DKP) derivatives have a broad range of biological activities in the medicinal field. The synthetic protocols of 1,3-disubstituted 2,5-DKPs via base-catalyzed cyclization of chloroacetamide have been reported. However, there are several drawbacks, such as an overly long reaction time, low to moderate yield, and racemization of the products. The sequence modified
摘要 手性2,5-二酮哌嗪(2,5-DKP)衍生物在医药领域具有广泛的生物活性。1,3-二取代的 2,5-DKPs 通过碱催化环化氯乙酰胺的合成方案已有报道。然而,存在一些缺点,例如过长的反应时间、低到中等的产率以及产物的外消旋化。本文修饰的 1,3-二取代 2,5-DKP 序列涉及微波辅助环化。它提高了产率并缩短了反应时间。此外,采用 N-PMB 保护可防止外消旋化,这在碱催化的环化反应中经常发生。因此,成功建立了通过微波反应快速合成对映体纯1,3-二取代2,5-DKPs的方法。