有机化学    

研究论文

有机碱驱动合成多取代苯并[b]噻吩-4-醇类化合物

任传清*, 李欣欣, 郭家伟, 季晓晖, 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 陕西汉中 723000
  • 收稿日期:2025-11-23 修回日期:2026-01-03
  • 基金资助:
    国家自然科学基金项目(No.22101165)和陕西省教育厅重点实验室项目(No. 23JS002)资助.

Synthesis of Multi-substituted Benzo[b]thiophene-4-ol Derivatives by Organobase-driven

Ren Chuanqing*, Li Xinxin, Guo Jiawei, Ji Xiaohui, Liu Bo   

  1. Shaanxi Key laboratory of Catalysis, School of Chemical & Environmental Science, Shaanxi University of Technology, Han-zhong, Shaanxi 723000
  • Received:2025-11-23 Revised:2026-01-03
  • Contact: *E-mail: rcqing2008@126.com
  • Supported by:
    National Natural Science Foundation of China(No. 22101165) and the Project of the Key Laboratory of Education Department of Shaanxi Province (No. 23JS002).

多取代苯并[b]噻吩骨架是一类重要的合成中间体. 本论文以3-取代基-1-噻吩基-2-丙烯-1-酮类化合物和硝基烷烃类化合物为底物,通过有机碱驱动环合反应合成了一系列多取代苯并[b]噻吩-4-醇类化合物. 实验探索表明,最佳实验条件如下:以2.5 mmol DBU(1,8-二氮杂二环[5.4.0]十一碳-7-烯)为碱,1.0 mmol 的3-取代基-1-噻吩基-2-丙烯-1-酮类化合物和1.2 mmol 硝基烷烃化合物为底物,在DMF(N,N-二甲基甲酰胺)溶剂中,于常温下反应8 h,合成了一系列多取代苯并[b]噻吩-4-醇类化合物,产率高达88%,产物结构经1H NMR、13C NMR以及HR-MS(ESI)分析确证,并对该反应合成机理进行了探讨. 该合成方法具有条件温和,实用高效的特点.

关键词: 有机碱驱动, 苯并[b]噻吩, 合成

Multi-substituted benzo[b]thiophene skeleton is an important synthetic intermediate. In this paper, a series of Multi-substituted benzo[b]thiophene-4-ol derivatives were successfully constructed from 3-substituted group-1-(thiophen-3-yl)prop-2-en-1-one and nitroso compound via Organobase-driven cycloaddition reactions. Optimization experiments showed that the best experimental conditions were as follows: using DBU (1,8-Diazabicyclo[5.4.0]undec-7-ene) (2.5 mmol) as base,the 3-substituted group-1-(thiophen-3-yl)prop-2-en-1-one (1.0 mmol) and nitroso compound (1.2 mmol) reacted at r.t. for 8 h in DMF(N,N-Dimethylformamide), Multi-substituted Benzo[b]thiophene-4-ol derivatives were synthesized with a yield of 88%. The composition and structure has been characterized by1H NMR,13C NMR and HR-MS(ESI). The mechanism for the reaction was proposed in this paper. The menthod has the characteristics of mild conditions and practical efficiency.

Key words: organobase-driven, benzo[b]thiophene, synthesis