Iodoethane → HCID 14182035, compound

Temperature

80 °C

A solution of 4-bromo-2,6-difluorophenol (1.04 g) in dry N,N-dimethylformamide (10 cm3) was added over 5 minutes to a well stirred mixture of sodium hydride (0.24 g of a 50% dispersion in oil) in dry N,N-dimethylformamide (5 cm3). After 30 minutes, ethyl iodide (0.78 g) was added in one portion. After stirring the reaction mixture for 30 minutes, analysis by gas liquid chromatography appeared to show no reaction; further ethyl iodide (5 g) was therefore added, and the reaction mixture was heated at 80° C. for 15 minutes. Later analysis showed similar retention times for both starting material and product, and the reaction may already have been complete prior to the second addition of ethyl iodide. The reaction mixture was washed, poured into water, and extracted with ethyl acetate. The combined organic extracts were dried over anhydrous sodium sulphate and evaporated under reduced pressure to give a red oil. The oil was purified by column chromatography on a silica gel support, eluting with an 8:1 parts by volume mixture of n-hexane and ethyl acetate to give 4-bromo-2,6-difluorophenetole as a colourless oil (1.02 g).

1. stirringAfter stirring the reaction mixture for 30 minutes
2. customno reaction
3. customthe reaction
4. washThe reaction mixture was washed
5. additionpoured into water
6. extractionextracted with ethyl acetate
7. dry with materialThe combined organic extracts were dried over anhydrous sodium sulphate
8. customevaporated under reduced pressure
9. customto give a red oil
10. customThe oil was purified by column chromatography on a silica gel support
11. washeluting with an 8:1 parts by volume mixture of n-hexane and ethyl acetate

ORD record

ord-0c2252cd8cdf4ddcbd694ed83403e3a1

Source dataset

uspto-grants-1993_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05225607