Indole → 1-(4-methoxyphenyl)-1H-indole

Participants

Reaction Steps

A slurry of 2.63 g (22.5 mmol) indole, 5.26 g (22.5 mmol) 4-iodoanisole, 0.43 g (3 mmol) CuBr and 4.14 g (30 mmol) K2CO3 in 60 ml anhydrous N-methylpyrrolidinone (NMP) was heated to reflux with stirring for 16 hr. The solution was allowed to cool and then poured into water and shaken with ethyl acetate. The entire biphasic system was filtered through a pad of Celite, the phases were separated, and the organic phase was dried over MgSO4 and concentrated. The crude product was chromatographed on silica (5-7% EtOAc-Hexane) to afford 3.53 g 1-(4-methoxyphenyl)-1H-indole as a colorless solid.

Provenance & Evidence