4-Quinolinecarboxylic acid → Quinoline-4-carbonyl chloride hydrochloride

Participants

Reaction Steps

To 4-quinolinecarboxylic acid (5.0 g, 29.1 mmol) at 0° C. under argon was added thionyl chloride (20.0 ml, 0.27 mol). The reaction mixture was slowly warmed to room temperature and stirred for 1 hour. Dichloromethane (100 ml) was added and the reaction mixture was refluxed for 3 hours. The solvents were removed by distillation and the residue was dried at 130° C. in high vacuum to afford 5.8 g (87%) of 4-quinolinecarboxylic acid chloride hydrochloride as a green crystals, m.p. 249°-251° C.

Provenance & Evidence