Trifluoroacetic acid → 1,1,3,3,3-Pentafluoro-2-oxopropane-1-sulfonic acid

Participants

Reaction Steps

25.6 g (0.10) mol of ethyl 2-ketopentafluoropropanesulfonate was stirred at 25° while 17.1 g (0.15 mol) of trifluoroacetic acid was added. The mixture was allowed to stand overnight, then heated on a spinning band still to reflux at 60°. Fractional distillation of the reaction mixture at pot temperatures below 100° and at a pressure of 2.6 mm resulted in the isolation of 18.4 g of 2-ketopentafluoropropanesulfonic acid, representing a yield of 81%, bp 73°.

Provenance & Evidence