Bismuth(III)-catalyzed cascade condensation of alkynyl alcohols with terminal alkynes: A facile construction of propargyl cyclic ethers
作者:Madhukar S. Pratapure、Ravindar Kontham
DOI:10.1016/j.tetlet.2022.154274
日期:2023.1
pent-4-yn-1-ols and hex-5-yn-1-ols) and terminal alkynes (aryl alkynes) to facile access to diverse propargyl cyclic ethers (2‑alkynyl tetrahydrofurans and 2‑alkynyl tetrahydropyrans). This simple and efficient cascade transformation proceeds through initial intramolecular hydroalkoxylation of alkynols to give corresponding cyclic enol ethers (via exo-dig or endo-dig mode of ring-closure) followed by