Allyl bromide → 2-Methylindole-4-acetic acid allyl ester

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-methylindole-4-acetic acid (53 g) in N,N-dimethylformamide (500 ml) was added dropwise allyl bromide (31 ml), and added anhydrous potassium carbonate (59 g). The mixture was stirred at 50° C. for 1 hour. After cooling to room temperature, the reaction mixture was poured into a mixture of 2N hydrochloric acid-ethyl acetate and then extracted with ethyl acetate. The extraction was washed with water and a saturated aqueous solution of sodium chloride, successively, dried and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (hexane-ethyl acetate) to give the title compound (43.5 g) having the following physical data.

Provenance & Evidence