Chinese Journal of Organic Chemistry ›› 2024, Vol. 44 ›› Issue (11): 3365-3374.DOI: 10.6023/cjoc202404037 Previous Articles     Next Articles

ARTICLE

Brønsted碱促进的β-(2-羟基芳基)乙烯磺酰氟与β,γ-不饱和酮酯(炔酮)串联环化反应合成多取代4H-色烯

唐德林, 罗锦昀, 杜广芬*(), 蔡志华, 何林*()   

  1. 石河子大学化学化工学院 新疆石河子 832000
  • 收稿日期:2024-05-22 修回日期:2024-06-08 发布日期:2024-07-10
  • 基金资助:
    国家自然科学基金(21662029); 石河子大学国际合作(GJHZ202204)

Synthesis of Multisubstituted 4H-Chromenes via Brønsted Base- Mediated Tandem Cyclization Reactions of β-(2-Hydroxyaryl) Ethenesulfonyl Fluorides and β,γ-Unsaturated Ketoesters (Ynones)

Delin Tang, Jinyun Luo, Guangfen Du*(), Zhihua Cai, Lin He*()   

  1. School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832000
  • Received:2024-05-22 Revised:2024-06-08 Published:2024-07-10
  • Contact: *E-mail:duguangfen@shzu.edu.cn;helin@shzu.edu.cn
  • Supported by:
    National Natural Science Foundation of China(21662029); International Cooperation Project of Shihezi University(GJHZ202204)

Under the catalysis of 20 mol% Cs2CO3, β-(2-hydroxyaryl) ethenesulfonyl fluorides reacted with ketoesters throu- gh a tandem intermolecular/intramolecular Michael addition process at room temperature, affording 11 multisubstituted 4H- chromenes bearing a useful sulfonyl fluoride groups in 56%~70% yields. In addition, under the mediation of 50 mol% Cs2CO3, β-(2-hydroxyaryl) ethenesulfonyl fluorides couple with ynones through a similar tandem process at 50 ℃, giving 12 multisubstituted 4H-chromenes in 25%~80% yields.

Key words: β-(2-hydroxyaryl) ethenesulfonyl fluorides, β,γ-unsaturated ketoesters (ynones), 4H-chromenes