Jf. Huot et al., FLUORINATED KETENE DITHIOACETALS .4. PERFLUOROKETENE DITHIOACETALS ASSTARTING MATERIALS FOR THE SYNTHESIS OF ALPHA-TRIFLUOROMETHYL-GAMMA-LACTONES, Synlett, (3), 1995, pp. 247-248
alpha-Trifluoromethyl gamma-lactones are synthesized from 1,1-diethylt
hioperfluoropropene by a three step procedure: substitution of the vin
ylic fluorine by an enolate, reduction, hydrolysis.