4-Carbomethoxyperfluoro-2-methyl-3-oxapentanoyl fluoride → Dipotassium perfluoro-2,4-dimethyl-3-oxa-1,5-pentanedioate

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Reaction Steps

The procedure of Example 1 was followed using ~95% pure 4-carbomethoxyperfluoro-2-methyl-3-oxapentanoyl fluoride (12.5 g, 39 mmol), potassium trimethylsilanolate (10 g, 78 mmol), and dry ether (300 mL). Dipotassium perfluoro-2,4-dimethyl-3-oxa-1,5-pentanedioate (14.6 g, 98% yield) was isolated as a white solid: 19F NMR (D2O) δ -78.8 (m, CF3, 6F), -124.1 (m, CF, 1F), -130.3 ppm (m, CF, 1F). Anal. Calcd. for C6F8K2O5 : C, 18.85; F, 39.76; K, 20.46. Found: C, 17.45; F, 37.65, 37.53; K, 21.50, 21.30.

Provenance & Evidence