We herein demonstrate that the amidebasegenerated in situ from CsF and N(TMS)3 catalyzes the deprotonative coupling reactions of terminal alkynes with polyfluoroarenes, wherein mono‐ and dialkynylations occur efficiently for penta‐ and hexafluorobenzenes, respectively. Tetraalkynylated products could also be synthesized from dialkynylated compounds.
Transition-Metal-Free Sonogashira-Type Cross-Coupling of Alkynes with Fluoroarenes
作者:Guanyi Jin、Xuxue Zhang、Song Cao
DOI:10.1021/ol401317m
日期:2013.6.21
A novel, inexpensive, and efficient palladium-, copper-, ligand-, and amine-free Sonogashira-type cross-coupling reaction of terminal alkynes with unreactive aryl fluorides in the presence of sodium, sodium methoxide, and calcium hydroxide under the assistance of a Grignard reagent was developed. A plausible mechanism was also suggested.
Wei, Ye; Zhao, Huaiqing; Kan, Jian, Journal of the American Chemical Society, 2010, vol. 132, p. 2522 - 2523