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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).

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