The utility of ionic liquids (8-ethyl-1,8-diazabicyclo[5,4,0]-7-undecene tr
ifluoromethanesulfonate and 8-methyl-1,8-diazabicydo[5,4,0]7-undecene trifl
uoromethanesulfonate) as a safe: recyclable reaction medium for the synthes
is of alpha -fluoro-alpha,beta -unsaturated esters by the Horner-Wadsworth-
Emmons reaction with aldehydes in the presence of base, is described. (C) 2
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