The reductive Mg-promoted defluorinative-silylation of 2, 2, 3, 3, 3- pentafluoropropiophenone readily produces the α-trifluoromethyl enol silyl ether, which then react with electrophiles to give a variety of 2-substituted-3, 3, 3-trifluoropropiophenones in excellent yields. The same protocol is applicable for the preparation of enol silyl ether of 3, 3, 3-trifluoropropiophenone. Fluoride ion catalyzed 1, 2-desilylative-defluorination of 2, 3, 3, ...
