Iodine → Ethanone, 2,2-difluoro-2-iodo-1-(2-methylphenyl)-

HRID 1782287Notes

Reaction equation

C[Si](Cl)(C)C.Cl[C:7]([F:18])([F:17])[C:8]([C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=1[CH3:16])=[O:9].[I:19]I.O>C(#N)C.[Zn]>[F:17][C:7]([F:18])([I:19])[C:8]([C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=1[CH3:16])=[O:9]

Participants

Conditions

Temperature: 55 °C

Procedure

To a suspension of zinc (1.6 g) in acetonitrile (40 mL) were added trimethylsilyl chloride (3.1 mL) and 2-chloro-2,2-difluoro-1-(2-methylphenyl)ethanone (4.0 g), and the mixture was stirred at 55° C. for 3 hr. The reaction mixture was allowed to cool to room temperature, iodine (3.5 g) was added, and the mixture was further stirred for 2 hr. Water was added to the reaction mixture, and the mixture was extracted with diethyl ether. The extract was washed with aqueous sodium hydrogen sulfite solution, aqueous sodium hydrogencarbonate solution and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by basic silica gel column chromatography (eluent: hexane) to give the title compound as a yellow oil (yield 2.6 g, 46%).

Workup

temperatureto cool to room temperature
stirringthe mixture was further stirred for 2 hr
extractionthe mixture was extracted with diethyl ether
washThe extract was washed with aqueous sodium hydrogen sulfite solution, aqueous sodium hydrogencarbonate solution and saturated brine
dry with materialdried over anhydrous sodium sulfate
concentrationconcentrated under reduced pressure
customThe residue was purified by basic silica gel column chromatography (eluent: hexane)

Sources & evidence

ORD record: ord-458204c058a546459660b75e02c2c7f6
Source dataset: uspto-grants-2009_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07498337B2

Reaction notes

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