Dimethyl Sulfate → Methyl perfluorobutyl ether

A 500 ml, 3-necked round bottom flask equipped with an overhead stirrer, an addition funnel, and a condenser was charged with anhydrous cesium fluoride (27.4 g, 0.18 mole), anhydrous diethylene glycol dimethyl ether (258 g), and dimethyl sulfate (22.7 g, 0.18 mole). Perfluorocyclohexanone (50 g, 0.18 mole) was then added dropwise to the resulting stirred mixture, and stirring was continued for 18 hours after the addition. Water (approximately 200 ml) was added to the resulting mixture, and the lower fluorochemical phase of the mixture was separated from the upper phase and washed once with saturated aqueous sodium chloride solution. Since the fluorochemical phase still contained about 12% diglyme, water was added to it, and the resulting product was azeotropically distilled to yield 32.8 g of c--C6F11OCH3 (b.p.=100° C.), which was free of diglyme. The product identity was confirmed by IR, GCMS, and 1H and 19F NMR.

1. customA 500 ml, 3-necked round bottom flask equipped with an overhead stirrer, an addition funnel, and a condenser
2. stirringstirring
3. additionafter the addition
4. customthe lower fluorochemical phase of the mixture was separated from the upper phase
5. washwashed once with saturated aqueous sodium chloride solution
6. additionSince the fluorochemical phase still contained about 12% diglyme, water was added to it
7. distillationthe resulting product was azeotropically distilled
8. customto yield 32.8 g of c

ORD-Eintrag

ord-90945a8decc34de693478c3fa4543fa4

Quelldatensatz

uspto-grants-1999_07

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05919393