5-Bromo-2,3-dichlorotoluene → HCID 66865196, compound

Participants

Reaction Conditions

Reaction Steps

To 1M solution of 1-(trifluoromethyl)ethenyl zinc bromide in tetrahydrofuran (see J. Org. Chem. 1991, 56, 7336 for preparation) (19 mL) was added a solution of 5-bromo-2,3-dichlorotoluene (2.2 g) in N,N-dimethylformamide (10 mL), then tetrahydrofuran was distilled off under reduced pressure. Dichlorobis(triphenylphosphine)palladium(II) (0.26 g) was added to the residual N,N-dimethylformamide solution, which was stirred at 100° C. for 3.5 hours under nitrogen atmosphere and then cooled to room temperature. To the resulting mixture was added tetrahydrofuran-hexane 2:5 mixture (200 mL) and filtered, and the filtrate was washed with water (100 mL) and brine, dried over anhydrous sodium sulfate and concentrated under reduced pressure to provide a residue. The residue was purified by column chromatography on silica gel eluted with hexane to afford the title compound as a brown oil (2.3 g).

Provenance & Evidence