有机化学 ›› 2023, Vol. 43 ›› Issue (9): 3297-3303.DOI: 10.6023/cjoc202304032 上一篇    下一篇

(S)-(–)-Xylopinine和(S)-(+)-Laudanosine的不对称合成

张俊杰, 徐学涛*()   

  1. 五邑大学生物科技与大健康学院 广东江门 529020
  • 收稿日期:2023-04-25 修回日期:2023-05-19 发布日期:2023-05-23
  • 通讯作者: 徐学涛
  • 基金资助:
    广东省教育厅基金(2021KCXTD044)

Junjie Zhang, Xuetao Xu()   

  1. School of Biotechnology and Health Science, Wuyi University, Jiangmen, Guangdong 529020
  • Received:2023-04-25 Revised:2023-05-19 Published:2023-05-23
  • Contact: Xuetao Xu
  • Supported by:
    Department of Education of Guangdong Province(2021KCXTD044)

四氢原小檗碱家族天然产物具有较好的生物活性, 其中xylopinine具有良好的抗疟疾活性, laudanosine则具有癫痫治疗活性. 报道了一种不对称合成( S)-(–)-xylopinine和( S)-(+)-laudanosine的策略. 该策略主要通过叔丁基亚磺酰亚胺发生非对映选择性1,2-加成, 并结合分子内Pictet-Spengler反应为关键步骤, 完成了四氢原小檗碱的分子骨架构建. 依据此策略, 从已知原料3,4-二甲氧基苯乙酸出发, 经7步反应分别以11.1%和16.4%的总收率完成了( S)-(–)-xylo- pinine和( S)-(+)-laudanosine的简洁、快速不对称合成. 通过对比xylopinine之间的比旋光度和laudanosine之间的比旋光度, 可以证明所合成的两个天然产物C(14)均为 S构型.

关键词: xylopinine, laudanosine, 叔丁基亚磺酰胺, 非对映选择性加成

Tetrahydroprotoberberine alkaloids have good bioactivity against malaria and epilepsy, among them, xylopinine has good anti malaria activity, while laudanosine has epilepsy treatment activity. A concise asymmetric synthesis of ( S)-(–)- xylopinine and ( S)-(+)-laudanosine has been reported. The key strategies include diastereoselective nucleophilic addition to N-tert-butanesulfinimine, which is combined with Pictet-Spengler reaction as a key step for constructing the pivotal tetrahydroprotoberberine skeleton. This strategy provides a concise and rapid approach to ( S)-(–)-xylopinine (7 steps and 11.1% overall yield) and ( S)-(+)-laudanosine (7 steps and 16.4% overall yield) from known starting materials. The S configuration of synthetic xylopinine and laudanosine at C(14) is confirmed by comparing their specific rotation data.

Key words: xylopinine, laudanosine, N-tert-butanesulfinimine, asymmetric addition