[C:1](Cl)(=O)C(Cl)=O.[Cl:7][C:8]1[CH:13]=[C:12]([C:14]([OH:16])=[O:15])[CH:11]=[C:10]([CH3:17])[N:9]=1>C(Cl)Cl>[Cl:7][C:8]1[CH:13]=[C:12]([C:14]([O:16][CH3:1])=[O:15])[CH:11]=[C:10]([CH3:17])[N:9]=1Oxalyl chloride (1.9 g, 15 mmol) was added to 2-chloro-6-methyl-pyridine-4-carboxylic acid (1.7 g, 10 mmol) in methylene chloride (30 ml) and the mixture stirred for 2 hours. The volatiles were removed by evaporation and methanol (20 ml) added to the residue. The mixture was stirred for 1 hour and the volatiles removed by evaporation to give methyl 2-chloro-6-methyl-pyridine-4-carboxylate (1.85 g, 100%) as an off-white solid.
Wird geladen…