Trifluoromethanesulfonic anhydride → 3,3,4,4,4-Pentafluorobutyl trifluoromethanesulphonate

Participants

Reaction Conditions

Reaction Steps

198.49 g (703.51 mmol) of trifluoromethanesulphonic anhydride were initially charged under argon. The flask was immersed in an oil bath having a temperature of 70° C. and heated to an internal temperature of 56° C. 88.2 ml (738.68 mmol) of 3,3,4,4,4-pentafluorobutanol were added dropwise over a period of 35 min to the reaction mixture. The mixture was stirred at a bath temperature of 70-73° C. and an internal temperature of 69° C. for 2 hours. The reaction mixture was concentrated under reduced pressure and the residue was taken up in 1500 ml of dichloromethane. The mixture was washed once with 300 ml of cold water, once with 300 ml of cold aqueous saturated sodium bicarbonate solution and once with 300 ml of cold water. The organic phase was dried with magnesium sulphate, filtered off and concentrated. This gave 192.86 g (92.6% of theory) of the target compound.

Provenance & Evidence