2,2,3,3,3-Pentafluoropropanol → Methyl 2,2,3,3,3-pentafluoropropyl carbonate

Temperature

120 °C

In a flask (500-ml volume) equipped with 10 distillation columns, 2,2,3,3,3-pentafluoropropanol (100 g, 0.67 mol), dimethyl carbonate (180 g, 2.0 mol) and a 28% sodium methoxide/methanol solution (1.3 g) were charged. The flask was heated to 120° C. to allow the starting materials to react for 10 hours while removing the methanol from the distillation columns by evaporation. After allowing the mixture to cool to room temperature, an aqueous solution of ammonium chloride was added to the mixture and the mixture was shaken to remove the sodium methoxide. The organic layer was washed with water, dried and distilled to give methyl 2,2,3,3,3-pentafluoropropyl carbonate as a colorless liquid (71 g, yield 51%). The chemical structure of the produced compound was determined based on the IR and NMR absorbance spectra shown in FIG. 7 and FIG. 8 respectively and the mass spectrometry spectrum (M/e=208).

1. customto react for 10 hours
2. customwhile removing the methanol
3. distillationfrom the distillation columns
4. customby evaporation
5. temperatureto cool to room temperature
6. additionan aqueous solution of ammonium chloride was added to the mixture
7. customto remove the sodium methoxide
8. washThe organic layer was washed with water
9. customdried
10. distillationdistilled

ORD record

ord-b1fd55473c5449a3ab3e758cd1fe68cf

Source dataset

uspto-grants-1997_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05633099