The trans-tetrafluoro-λ6-sulfane (SF4) group has been utilized as a unique three-dimensional building block for the linear connection of two independent N-heterocycles, pyridines and triazoles. The linearly connected heterocycliccompounds were synthesized by thermal Huisgen 1,3-dipolar cycloaddition between previously unknown pyridine SF4-alkynes and readily available azides, providing a series of
Synthesis of Pyridine-SF<sub>4</sub>-Alkynes via Light-Promoted Radical Coupling of Pyridine-SF<sub>4</sub>-Chlorides and EBX Reagents
作者:Elsayed M. Mahmoud、Hiroto Iwasaki、Kenshiro Hada、Yusuke Murata、Yuji Sumii、Norio Shibata
DOI:10.1246/bcsj.20220330
日期:2023.2.15
pyridine-heterocycles. They are prepared via a two-step procedure of the radical addition of pyridine-tetrafluoro-λ6-sulfanyl-chlorides and alkynes and subsequent base-promoted elimination of HCl. Herein we developed a straightforward alternative synthesisvia the radical coupling of pyridine-tetrafluoro-λ6-sulfanyl-chlorides with ethynylbenziodoxolone reagents under LED irradiation.