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
Chinese Journal of Organic Chemistry . 2024, (11): 3365 -3374 .  DOI: 10.6023/cjoc202404037