How is 2,6-Dimethoxypyrazine (CAS: 4774-15-6) typically synthesized?

2,6-Dimethoxypyrazine can be synthesized through the reaction of 2-methoxy-6-nitropyridine with stannous chloride in an aqueous solvent. The nitro group is reduced to an amino group, followed by the addition of methanol to form the dimethoxy derivative. This method provides good selectivity and yield, with the final product purified by recrystallization.