Triethylamine → 2-(3,4-Dimethylphenyl)-hexafluoro-2-propyl alpha-fluoroacrylate

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A solution of 27.3 g (0.1 mol) Of 2-(3,4-dimethylphenyl)hexafluoro-2-propanol and 10.1 g (0.1 mol) of triethylamine in 50 ml of dry diethyl ether was added dropwise with stirring at a temperature of 20° C. to a solution of 20 g (0.184 mol) of α-fluoroacryloyl chloride (obtained according to Example 4) in 50 ml of dry diethyl ether in the course of 35 minutes. The reaction mixture was then stirred at a temperature of 20° C. for a further 3.5 hours. The resulting solid was filtered off. The filtrate was distilled under reduced pressure after addition of 0.01 g of hydroquinone monomethyl ether. 17.7 g (51 percent of theory) of 2-(3,4-dimethylphenyl)-hexafluoro-2-propyl α-fluoroacrylate having a boiling point of 72° to 73° C. (under 0.4 mbar) were obtained.

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