(5,5-dimethyl-3-oxocyclohexen-1-yl) trifluoromethanesulfonate

(4-cyano-2-methoxyphenyl) trifluoromethanesulfonate

1-trimethylsilylethyl trifluoromethanesulfonate

1-triethylsilylethyl trifluoromethanesulfonate

4-Bromophenyl trifluoromethanesulfonate