Abstract Reactions of trifluoromethane-and tridecafluorohexanesulfonyl chlorides with silyl enol ethers have been investigated in the presence of a ruthenium (II) phosphine complex. Perfluoroalkylation and chlorination occurred depending on the substituent of silyl enol ether; ie perfluoroalkylated compound was selectively obtained in the reactions with silyl enol ether possessing an electron-withdrawing group, on the other hand, chlorinated ...