Hydrochloric Acid → 4-(4-Chloro-2-fluorophenyl)-6-methylnicotinic acid

Participants

Reaction Steps

To a solution of Methyl 4-(4-chloro-2-fluorophenyl)-6-methylnicotinate (700 mg, 2.50 mmol) in MeOH (5 mL) was added NaOH (200 mg, 7.51 mmol) in water (5 mL). The reaction mixture was stirred at room temperature for 2 h. Then it was evaporated under reduced pressure and the residue obtained was adjusted to pH ˜3 by adding 1.5N HCl solution. The product was extracted with dichloromethane. The organic phase was dried over Na2SO4, and concentrated under reduced pressure to afford 4-(4-chloro-2-fluorophenyl)-6-methylnicotinic acid (500 mg, 1.730 mmol, 69% crude yield) as white solid. The material was carried forward without further purification. LC/MS (ESI) m/e 266.0 [(M+H)+, calcd for C13H10ClFNO2 266.0]; LC/MS retention time (Method I): tR=1.51 min.

Provenance & Evidence