Hydrochloric Acid → Methyl 6-chloropyridine-3-carboxylate

Participants

Reaction Steps

Hydrochloric acid (gas) was bubbled through a solution of 6.11 g (38.8 mmol) of 6-chloronicotinic acid in approximately 350 ml of methanol. The resultant reaction mixture was reacted for approximately two hours at reflux temperature, then cooled to room temperature and concentrated in vacuo to provide a white residue. This residue was redissolved in methylene chloride and the resultant solution was washed with a saturated sodium bicarbonate solution. The organic portion was dried over sodium sulfate, filtered and then reduced to dryness in vacuo to provide 7.28 g of a tan solid. This solid was crystallized from pentane, followed by recrystallization from hexane to provide the desired titled compound.

Provenance & Evidence