Indole → 1-[(4-Nitrophenyl)methyl]-1H-indole

Participants

Reaction Conditions

Reaction Steps

A mixture of 5.28 g of sodium hydride (0.22 mol, mineral oil suspension) in 200 ml of dimethyl sulfoxide is treated with a solution of 23.4 g (0.2 mol) of indole in 100 ml of dimethyl sulfoxide. It is heated at 65° C. for 1 hour, then allowed to cool and 37.7 g (0.22 mol) of 4-nitrobenzyl chloride are then added dropwise. The solution is heated to 60° C., kept at room temperature for 14 hours and then poured into 700 ml of ater with stirring. The mixture is extracted in portions with a total of 300 ml of methylene chloride, the organic phase is dried using anhydrous sodium sulfate, filtered and the filtrate is concentrated in vacuo. The residue is purified on a silica gel column (silica gel 60, Merck AG, Darmstadt; eluent methylene chloride/ethanol 9:1, v/v).

Provenance & Evidence