PERFLUORO-2,5,8,11,14,17-HEXAMETHYL-3,6,9,12,15,18-HEXAOXAHENEICOSANOYL FLUORIDE synthesis
- Product Name:PERFLUORO-2,5,8,11,14,17-HEXAMETHYL-3,6,9,12,15,18-HEXAOXAHENEICOSANOYL FLUORIDE
- CAS Number:13140-24-4
- Molecular formula:C21F42O7
- Molecular Weight:1162.15
Yield:-
Reaction Conditions:
with potassium fluoride at 10; for 1 h;Green chemistry;
Steps:
7.1 7.1: Preparation of F[CF(CF3)CF2O]6CF(CF3)C(O)F
F[CF(CF3)CF2O]6CF(CF3)C(O)F, a precursor of hydrofluoroether F[CF(CF3)CF2O]7CH3, was formed by oligomerization of hexafluoropropylene oxide. To the reaction vessel, potassium fluoride (10.0 g), hexafluoropropylene oxide dimer (150.0 g) and tetraethylene glycol dimethyl ether (2.5 L) were added at 10 ° C under stirring.To the round bottom flask was introduced hexafluoropropylene oxide (830 g, 5.0 mol) over 1 hour.The lower acyl fluoride phase product is collected and consists mainly of hexafluoropropylene oxide oligomers. The crude product was further purified by distillation to obtain a product of a hexafluoropropylene oxide heptamer having a purity of 98% as determined by gas chromatography, and used in the next alkylation reaction. The structure of the product was characterized by infrared spectroscopy and 19F NMR.
References:
CN109608312,2019,A Location in patent:Paragraph 0088-0090
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