Carbon tetrabromide → 3-(2-bromoethyl)-6-chloro-5-methyl-2-(triethylsilyl)-1H-indole

Participants

Reaction Steps

A solution 2-(6-chloro-5-methyl-2-(triethylsilyl)-1H-indol-3-yl)ethanol (1.44 g; 4.45 mmol) in THF (6 mL) was added to a solution of triphenyl phosphine (1.75 g; 6.67 mmol) and perbromomethane (2.21 g; 6.67 mmol) in THF (40 mL) pre-stirred for 30 minutes. The resulting mixture was stirred at room temperature for 18 hours. The reaction mixture was then filtered and concentrated under reduced pressure. The crude residue was purified by flash chromatography on silica gel (eluent 2 to 20% ethyl acetate in heptane) to afford 0.725 g (42%) of the title compound as a brown oil.

Provenance & Evidence