Dimethyl Sulfoxide → 4-(3-chloropropoxy)-1H-indole

Participants

Reaction Steps

A mixture of 4-hydroxyindole (0.100 g, 0.75 mmol, 1.0 eq), powdered potassium hydroxide (0.042 g, 0.75 mmol, 1.0 eq), and DMSO (3 mL) was stirred at room temperature for 1 hour before 1-bromo-3-chloropropane (0.118 g, 0.75 mmol, 1.0 eq) was added. The above mixture was then stirred at room temperature for another 0.5 hour and then 15 mL of water was added to it. The resultant mixture was extracted with ethyl acetate (2×30 mL). The organic layer was collected, combined, washed with water (6×25 mL) and brine (2×20 mL), and dried over anhydrous Na2SO4. The solvent was removed in vacuo and the residue was purified by flash chromatography over silica gel using hexane/ethyl acetate (95/5) as an eluant to afford 4-(3-chloropropoxy)-1H-indole (0.130 g, yield: 83%).

Provenance & Evidence