Poly-4-vinylpyridinium Poly(Hydrogen Fluoride): A Solid Hydrogen Fluoride Equivalent Reagent
作者:George A. Olah、Xing-Ya Li、Qi Wang、G. K. Surya Prakash
DOI:10.1055/s-1993-25924
日期:——
Poly-4-vinylpyridinium poly(hydrogen fluoride) (PVPHF), containing 35-60% hydrogen fluoride by weight, was prepared as a solid hydrogen fluoride equivalent reagent. PVPHF with 60% hydrogen fluoride by weight was found to be a versatile fluorinating agent for the hydrofluorination and bromofluorination of alkenes and alkynes, fluorination of alcohols as well as other fluorination reactions. Low hydrogen fluoride content PVPHF (3 equivalents of hydrogen fluoride to 1 equivalent of 4-vinylpyridine unit) was also found to be an efficient reagent for bromofluorination of alkenes in the presence of 1,3-dibromo-5,5-dimethylhydantoin. Fluorosulfonic acid-modified PVPHF showed enhanced reactivities for the fluorination of secondary alcohols.
The combination of ammonium hydrogenfluoride and porous aluminiumfluoride (NH4HF2-AlF3) is a useful solidreagent for introducing fluorine to simple alkenes with N-halosuccinimide under sonication to afford the halofluorinated compounds.
Halofluorination of alkenes with ionic liquid EMIMF(HF)2.3
作者:Hideaki Yoshino、Seijiro Matsubara、Koichiro Oshima、Kazuhiko Matsumoto、Rika Hagiwara、Yasuhiko Ito
DOI:10.1016/j.jfluchem.2003.11.015
日期:2004.3
Halofluorination of alkene by means of N-halosuccinimide and ionic liquid, 1-ethyl-3-methylimidazorium oligo hydrogenfluoride (EMIMF(HF)2.3), was demonstrated. Various alkenes were converted into P-halo organofluorides in good yields after non-aqueous work-up. (C) 2003 Elsevier B.V. All rights reserved.
A new method for introducing iodo and bromo fluorides into organic molecules using elemental fluorine
作者:Shlomo Rozen、Michael Brand
DOI:10.1021/jo00218a020
日期:1985.9
ICHIHARA, JUNKO;FUNABIKI, KOTARO;HANAFUSA, TERUKIYO, TETRAHEDRON LETT. , 31,(1990) N2, C. 3167-3170