Carbon tetrabromide → 3-(2-bromoethyl)-2-(triethylsilyl)-1H-indole-5-carbonitrile

Participants

Reaction Steps

A solution 3-(2-hydroxyethyl)-2-(triethylsilyl)-1H-indole-5-carbonitrile (0.873 g; 2.91 mmol) in THF (6 mL) was added to a solution of triphenylphosphine (1.52 g; 5.81 mmol) and perbromomethane (1.93 g; 5.81 mmol) in THF (30 mL) pre-stirred for 30 minutes. The resulting mixture was stirred at room temperature overnight, filtered and concentrated under reduced pressure. The crude mixture was purified by flash chromatography on silica (eluent 2 to 40% ethyl acetate in heptane) to yield 0.906 g (86%) of the title compound as a white solid.

Provenance & Evidence