A mild ring opening fluorination of epoxide with ionic liquid 1-ethyl-3-methylimidazorium oligo hydrogenfluoride (EMIMF(HF)2.3)
作者:Hideaki Yoshino、Kenichi Nomura、Seijiro Matsubara、Koichiro Oshima、Kazuhiko Matsumoto、Rika Hagiwara、Yasuhiko Ito
DOI:10.1016/j.jfluchem.2004.02.002
日期:2004.7
Ringopening fluorination of epoxides with hydrogenfluoride in ionic liquid 1-ethyl-3-methylimidazorium oligo hydrogenfluoride EMIMF(HF)2.3 was demonstrated. This ionic liquid released hydrogenfluoride graduately to make mild conditions without oligomerization of epoxides.
Hydrogenfluoride is a basic fluorinating reagent, but handling it is difficult. For this reason, some modified fluorinating reagents such as HF-pyridine, Et3N-HF, and poly(hydrogenfluoride) complex have been developed. Those reagents, however, still require aqueous work-up procedures which generate hydrogenfluoride. Recently, ionic liquids have received much attention because of the ease in handling