有机化学    

研究论文

铜催化2-芳基吲哚酰基化/环化反应合成吲哚[2,1-a]异喹啉酮衍生物

杨梦娜a, 唐裕才a,*, 蒋洁a, 李佳丽a, 潘若涵a, 陈宇a, 段京林a, 张松柏a   

  1. a湖南文理学院化学与材料工程学院, 水处理功能材料湖南省重点实验室,电镀废水回用技术湖南省工程技术研究中心 常德 415000
  • 收稿日期:2024-05-21 修回日期:2024-06-26
  • 基金资助:
    湖南省教育厅基金项目(No. 23B0650, 23A0503)、湖南省自然科学基金项目(2022JJ30419)和大学生创新创业项目(S202110549001S)资助.

Copper(I)-catalyzed acylation/cyclization of 2-aryl-N-acryloyl indole with benzohydrazides toward indolo[2,1-α]isoquinoline derivatives

Mengna Yanga, Yucai Tanga,*, Jie Jianga, Jiali Lia, Ruohan Pana, Yu Chena, Jinglin Duana, Songbai Zhanga   

  1. aCollege of Chemistry and Materials Engineering, Hunan Provincial Key Laboratory of Water Treatment Functional Materials, Hunan Province Engineering Research Center of Electroplating Wastewater Reuse Technology, Hunan University of Arts and Science, Changde 415000
  • Received:2024-05-21 Revised:2024-06-26
  • Contact: *E-mail: yctang1009@163.com
  • Supported by:
    Scientific Research Foundation of Hunan Provincial Education Department (23B0650 and 23A0503), the Natural Science Foundation of Hunan Province (2022JJ30419) and the Innovation and Entrepreneurship Training Program for College Students (S202110549001S).

吲哚[2,1-a]异喹啉酮衍生物是一类重要的生物活性分子, 表现出良好的抗菌活性。本文发展了一种以CuI为催化剂, 叔丁基过氧化氢为氧化剂条件下以2-芳基吲哚和苯甲酰肼为原料,实现不饱和双键的自由基酰基化/环化反应构建吲哚[2,1-a]异喹啉酮衍生物。该方法具有良好的官能团耐受性,一系列酰基取代的吲哚[2,1-a]异喹啉酮类化合物以中等到良好的收率得到 (41 examples)。自由基捕捉实验表明,该反应可能经历了自由基历程。

关键词: 吲哚[2,1-a]异喹啉酮, CuI, 2-芳基吲哚, 苯甲酰肼, 酰基化/环化

Indole[2,1-α]isoquinolines are an important class of bioactive molecules and shows good antibacterial activity. In the present study, an efficient copper(I)-catalyzed acylation/cyclization has been developed for the construction of indolo[2,1-α]isoquinoline derivatives by utilizing 2-aryl-N-acryloyl indole and benzohydrazide as reactants in the presence of CuI as catalyst and tert-butyl hydroperoxide as oxidant. The present protocol exhibits good functional group tolerance and a series of acylated indole[2,1-α]isoquinolines were synthesized in moderate to good yields (41 examples). Radical trapping experiments indicated that the reaction may involve a radical process.

Key words: indolo[2,1-a]isoquinolin-6(5H)-ones, CuI, 2-aryl-N-acryloyl indoles, benzohydrazide, acylation/cyclization