Carbon tetrafluoride → Perfluoro 4,4-dimethyl-3-isopropyl-2-pentene

1 mmol (450 mg) of perfluoro(3-ethyl-2,4-dimethyl-2-pentene) and 4.0 mmol (568.8 mg) of trifluoromethyltrimethylsilane were weighed into a 10-ml fluororesin-made reaction container, then 1 ml of dimethyl formamide and 0.1 mmol of acidic potassium fluoride (KHF2, 7.8 mg) were added therein. A fluororesin-made magnetic stirrer was placed and the mixture was stirred vigorously for 1 hour at room temperature, and then 1.0 mmol of trifluoromethyltrimethylsilane (142.2 mg) and 0.1 mmol of acidic potassium fluoride (KHF2, 7.8 mg) were added and the mixture was further stirred vigorously for 1 hour at room temperature. After completion of the reaction, the transparent lower perfluorocarbon layer was analyzed by gas chromatography using a capillary column (NB-1, 0.25 μm, 1.5 mm ID×60 m). The yield of the main product perfluoro(2,4,4-trimethyl-3-isopropyl-2-pentene) was 74.5% by weight. As the by-product, perfluoro 4,4-dimethyl-3-isopropyl-2-pentene was obtained at the yield of 25.5% by weight. The starting material perfluoro(3-ethyl-2,4-dimethyl-2-pentene) was consumed completely by the reaction.

1. customA fluororesin-made magnetic stirrer was placed
2. stirringthe mixture was further stirred vigorously for 1 hour at room temperature
3. customAfter completion of the reaction

ORD record

ord-13ce255a86bf4c28b9543ff9474bc153

Source dataset

uspto-grants-2004_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06710214B2