5-Azaindole → 3-Chloro-1H-pyrrolo[3,2-c]pyridine

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Reaction Steps

A solution of 1H-pyrrolo[3,2-c]pyridine (200 mg, 1.69 mmol) in dichloromethane (10 mL) was treated with N-chlorosuccinimide (332 mg, 2.5 mmol) and stirred at room temperature for about 5 hours. The reaction mixture was diluted with dichloromethane and washed with aq. sodium hydrogen carbonate solution, brine, dried over anhydrous sodium sulphate and concentrated. Purification by silica gel (100-200) column chromatography using methanol and dichloromethane gradient as eluent afforded 3-chloro-1H-pyrrolo[3,2-c]pyridine (103 mg, 40%).

Provenance & Evidence