Methanol → Methyl 2,2,3-trifluoro-3-[1,1,2,2,3,3-hexafluoro-3-(trifluoromethoxy)propoxy]propanoate

Participants

Reaction Conditions

Reaction Steps

A 2 liter glass flask equipped with a thermometer, reflux condenser, dropping funnel and stirrer was used. 159 g of CF3O(CF2)3OCHFCF2CH2OH, 520 g water, and 100 g sulfuric acid were added to the flask. 190 g KMnO4 were added manually to the liquid over a period of 2 hours while stirring. The reaction temperature increased to 95° C. over time. After a post reaction time of two hours, an aqueous solution of sodium bisulfite was added until a clear solution was formed. 100 g of methanol and in total 400 g of 50% aqueous sulfuric acid were added. Flash distillation of the reaction mixture resulted in a two phase distillate. Fractionation of the lower phase (120 g) gave 85.5 g of CF3O(CF2)3OCHFCF2COOCH3 (bp 34-35° C./6 mbar; yield 50%).

Provenance & Evidence