Fluorolactonization of unsaturated carboxylic acids with F-TEDA-BF4 in ionic liquids
摘要:
Fluorolactonization of unsaturated carboxylic acids under action of the electrophilic reagent F-TEDA-BF4 in ionic liquids (ILs) has been studied. This reaction proceeds in ILs faster and provides a better stereoselectivity in comparison to acetonitrile as reaction media. Gem-difluorinated gamma-lactones have been synthesized by interaction of unsaturated carboxylic acids with F-TEDA-BF4 in ILs. (C) 2011 Elsevier Ltd. All rights reserved.
silver(I)-mediated decarboxylativefluorination of paraconicacids using Selectfluor® as a fluorine source is reported. Readily available paraconicacids undergo decarboxylativefluorination with Selectfluor® mediated by AgNO3 to give the corresponding β-fluorinatedγ-butyrolactones in moderate to good yields. This approach serves as a direct and site-selective strategy for the introduction of a fluorine atom at