高等学校化学学报 ›› 2024, Vol. 45 ›› Issue (5): 20240033.doi: 10.7503/cjcu20240033

• 有机化学 • 上一篇    下一篇

钯催化合成噻吩并[2,3-b]噻喃-4-酮类化合物

任传清(), 季晓晖, 张强, 曹小燕, 季建伟, 刘波   

  1. 陕西理工大学化学与环境科学学院, 陕西省催化基础与应用重点实验室, 汉中 723000
  • 收稿日期:2024-01-19 出版日期:2024-05-10 发布日期:2024-03-06
  • 通讯作者: 任传清 E-mail:rcqing2008@126.com
  • 基金资助:
    国家自然科学基金(22101165);陕西省教育厅重点实验室项目(23JS002)

Synthesis of Thieno[2,3-b]thiopyran-4-one Derivatives by Palladium Catalysts

REN Chuanqing(), JI Xiaohui, ZHANG Qiang, CAO Xiaoyan, JI Jianwei, LIU Bo   

  1. Shaanxi Key Laboratory of Catalysis,School of Chemical & Environmental Science,Shaanxi University of Technology,Hanzhong 723000,China
  • Received:2024-01-19 Online:2024-05-10 Published:2024-03-06
  • Contact: REN Chuanqing E-mail:rcqing2008@126.com
  • Supported by:
    the National Natural Science Foundation of China(22101165);the Project of the Key Laboratory of Education Department of Shaanxi Province, China(23JS002)

摘要:

噻吩并[2,3-b]噻喃骨架化合物是一类广泛存在于天然产物中的重要有机分子, 也是一类重要的生物活性分子. 本文以1,6-二取代基-4-(1,3-二硫戊环-2-亚基)-己烯-5-炔-3-酮类化合物为原料, 通过钯催化环合反应合成了一系列噻吩并[2,3-b]噻喃-4-酮类化合物. 通过实验筛选的最佳条件如下: 以摩尔分数为30%的 Pd(OAc)2作为催化剂, 采用1.0 mmol的底物和1.2 mmol K2CO3, 在DMF溶剂中, 于100 ℃反应8 h, 合成了噻吩并[2,3-b]噻喃-4-酮类化合物, 产率高达87%, 产物结构经核磁共振波谱(1H和13C NMR)及高分辨质谱[HRMS(ESI)]分析确证, 并对反应机理进行了探讨. 研究结果表明, 该方法条件温和、 操作安全且收率高.

关键词: 醋酸钯, 催化, 噻吩并[2,3-b]噻喃, 二硫缩烯酮

Abstract:

Thieno[2,3-b]thiopyrans are important core structures found in a variety of natural products and other biologically important molecules with a wide range of biological activities. In this work, a series of thieno[2,3-b]thiopyran-4-one derivatives was constructed from 1,6-disubstituted group-4-(1,3-dithiolan-2-ylidene)-1-en-5-yn-3-one via palladium-catalyzed cycloaddition reactions. Optimization experiments showed that the best experimental conditions were as follows: using Pd(OAc)2 (30%, molar fraction) as catalyst, the substrate(1.0 mmol) and K2CO3(1.2 mmol) reacted at 100 ℃ for 8 h in NN-dimethylformamide(DMF), thieno[2,3-b]thiopyran-4-one derivatives were synthesized with a yield of 87%. The composition and structure has been characterized by menas of nuclear magnetic resonance(1H NMR and 13C NMR) and high resolution mass spectrometer(electrospray ionization)[HRMS(ESI)]. The mechanism for the reaction was proposed. The menthod had the advantages of mild conditions, safe operation and higher yields.

Key words: Palladium acetate, Catalyze, Thiophene[2, 3-b]thiapyran, Ketene dithioacetal

中图分类号: 

TrendMD: