1: 2-methyl-3-nitropyridine; N,N-dimethyl-formamide dimethyl acetal in N,N-dimethyl-formamide T=120°C; 17 h; 2: With palladium 10 on activated carbon; hydrogen in methanol; formic acid 23 h; 3: acetic anhydride With 4-(N,N-dimethlyamino)pyridine; triethylamine in dichloromethane

potassium carbonate in methanol