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酰胺的“一瓶”催化不对称还原型Bischler-Napieralski反应:生物活性1-取代四氢异喹啉的对映选择性合成

卢广生, 韩增, 叶剑良*, 黄培强*   

  1. 福建省化学生物学重点实验室(厦门大学),化学与化工学院,厦门大学,厦门,361005
  • 投稿日期:2025-12-25
  • 基金资助:
    国家自然科学基金(22571267和21931010)资助项目.

One-pot, Catalytic Asymmetric Reductive Bischler-Napieralski-Type Reaction of Amides: An Enantioselective Entrance to Biologically Active 1-Substituted Tetrahydroisoquinolines

Lu Guang-Sheng, Han Zeng, Ye Jian-Liang*, Huang Pei-Qiang*   

  1. Fujian Key Laboratory of Chemical Biology (Xiamen University), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
  • Received:2025-12-25
  • Contact: *E-mail: yejl@xmu.edu.cn; pqhuang@xmu.edu.cn
  • Supported by:
    National Natural Science Foundation of China (22571267 and 21931010).

Herein, we report the one-pot, catalytic asymmetric reductive Bischler-Napieralski-type reaction of amides as the first demonstration of a new strategy for the asymmetric reductive transformation of amides, which allowed for the one-pot, enantioselective entrance to tetrahydroisoquinoline (THIQ). The method features a tandem sequence involving the Tf2O/2-F-Pyr.-promoted Bischler-Napieralski dehydracyclization and an aqueous Noyori-type catalytic asymmetric transfer hydrogenation (CATH). By this one-pot method, a variety of THIQ derivatives were synthesized in high yields and in excellent enantioselectivities. This protocol accommodates N-arylethyl aromatic amides bearing either electron-rich or electron-deficient group on the acyl moiety, and N-arylethyl aliphatic amides. The synthetic utility of this methodology was demonstrated via the efficient, catalytic enantioselective synthesis of four alkaloids: (S)-salsolidine, (S)-laudanosine, (S)-xylopinine, and (S)-N-norlaudanidine, and medicinal agent ACT-335827. Additionally, formal synthesis of alkaloid (S)-cryptostyline III and medicinal agents such as almorexant was achieved.

Key words: amide, amide activation, tetrahydroisoquinoline, Bischler-Napieralski-type cyclization, catalytic asymmetric transfer hydrogenation, alkaloid