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研究论文

炔基亚砜的分子内交叉偶联/[3,3]-硫鎓离子重排策略构建环烷并[c]呋喃

郭闻涛, 孟书玉, 王全瑞*   

  1. 复旦大学化学系 上海 200438
  • 收稿日期:2025-07-02 修回日期:2025-08-24
  • 基金资助:
    国家自然科学基金(No. 21971042)资助项目.

Intramolecular Cross-Coupling/[3,3]-Sulfonium Rearrangement of Alkynyl Sulfoxides for the Construction of Cycloalkano[c]furans

Guo Wentaoa, Meng Shuyua, Wang Quanruia,*   

  1. aDepartment of Chemistry, Fudan University, Shanghai 200438
  • Received:2025-07-02 Revised:2025-08-24
  • Contact: *E-mail: E-mail: qrwang@fudan.edu.cn
  • Supported by:
    National Natural Science Foundation of China (No. 21971042).

报道了一种基于分子内串联重排反应的双环呋喃类化合物的合成策略。该串联反应由三氟化硼乙醚络合物催化的炔基硫醚与炔基亚砜的分子内交叉偶联引发,随后经历[3,3]-σ硫鎓离子重排及5-exo-dig环化反应,最终以中等产率以及100%原子经济性获得产物环烷并[c]呋喃。所得呋喃类化合物的合成应用价值已通过对产物中烷硫基和呋喃环的后修饰反应得到验证。

关键词: [3,3]-重排, 硫鎓离子, 杂环化, 环烷并[c]呋喃, 分子内反应

An intramolecular tandem rearrangement for the synthesis of bicyclic furans is reported. The reaction was initiated by an intramolecular cross-coupling of the built-in alkynyl sulfoxide and alkynyl sulfide motifs in the presence of BF3·Et2O, followed by a [3,3]-sigmatropic sulfonium rearrangement and 5-exo-dig cyclization, affording cycloalkano[c]furans as final products in moderate yields with 100% atom economy. The synthetic utility of the resulting furans has been demonstrated through late-stage diversification by utilizing the alkylthio groups or the furan rings.

Key words: [3,3]-rearrangement, sulfonium ion, heterocyclization, cycloalkano[c]furan, intramolecular reaction