[C:1]([O:9][CH3:10])(=[O:8])[C:2]1[CH:7]=[CH:6][N:5]=[CH:4][CH:3]=1.[CH3:11][I:12]>CO>[I-:12].[CH3:10][O:9][C:1]([C:2]1[CH:7]=[CH:6][N+:5]([CH3:11])=[CH:4][CH:3]=1)=[O:8]700 g of methyl isonicotinate and 1.4 kg of methyl iodide were admixed in 2.0 liters of methanol and the resultant solution was stirred and refluxed for 5 hours. After cooling, the mixture was filtered off and the product was washed with ether and dried to obtain 1.385 kg of 4-methoxycarbonyl-1-methylpyridinium iodide (97.2% yield).
Wird geladen…