Synthesis and Applications of Cyclohexenyl Halides Obtained by a Cationic Carbocyclisation Reaction
作者:Pedro Alonso、Pilar Pardo、Raquel Fontaneda、Francisco J. Fañanás、Félix Rodríguez
DOI:10.1002/chem.201702490
日期:2017.9.21
alkenyl halides (mainly fluorides, chlorides and bromides) from alkynol or enyne derivatives by an acid‐mediated cationic cyclisation reaction is disclosed. This high‐yielding, scalable and technically simple method complements and challenges conventional methodologies. This study includes the development of biomimetic cationic cyclisation reactions of polyenyne derivatives to give interesting halogen‐containing
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