Iodofluorination reaction of alkenes and alkynes using the iodonium ion electrochemically generated in situ from the iodide anion was carried out. The reaction proceeds at room temperature to provide iodofluorination products regioselectively.
It was found that potassium fluoride-poly(hydrogen fluoride) salts are useful fluorine sources for halofluorination of alkenes. The reaction proceeded with these salts and N-halosuccinimides or 1,3-dibromo-5,5-dimethylhydantoin in a regio- and stereoselective manner.
Halofluorination of Alkenes Using Dilute Hydrofluoric Acid
作者:Manabu Kuroboshi、Tamejiro Hiyama
DOI:10.1246/bcsj.68.1799
日期:1995.7
Iodofluorination of alkenes was achieved with N-iodosuccinimide, potassium hydrogendifluoride, and 1 M hydrofluoric acid using tetrabutylammonium fluoride as a phase-transfer catalyst. The active fluorinating reagent was shown to be tetrabutylammonium dihydrogentrifluoride by preparing the salt in a different way and by effecting the same transformation under anhydrous conditions. Bromofluorination
使用四丁基氟化铵作为相转移催化剂,用 N-碘代琥珀酰亚胺、二氟化氢钾和 1 M 氢氟酸实现烯烃的碘氟化。通过以不同的方式制备盐并在无水条件下进行相同的转化,活性氟化试剂显示为四丁基二氟化氢铵。烯烃的溴氟化也使用 1,3-二溴-5,5-二甲基乙内酰脲进行。用 DBU 处理 I-F 加合物可立体定向地提供氟烯烃。
Polymers as Reagents and Catalysts. XI. Stereospecific Iodofluorination of Alkenes in the Presence of Polymer Supported Hydrogen Fluoride
作者:Ana Gregorcic、Marko Zupan
DOI:10.1246/bcsj.60.3083
日期:1987.8
N-Iodosuccinimide reacted with phenyl substituted alkenes in the presence of insoluble polymer supported hydrogenfluoride, which was prepared by reaction of hydrogenfluoride with crosslinked poly(styrene-co-4-vinylpyridine) containing 40–45 mol% of 4-vinylpyridine, thus forming vicinal iodofluorides in high yields. Reactions proceeded with Markovnikov type regioselectivity, and in the case of (Z)-