How is 6-Chloro-2-methyl-3-nitropyridine (CAS: 56057-19-3) typically synthesized?

6-Chloro-2-methyl-3-nitropyridine is commonly synthesized through electrophilic aromatic substitution reactions. A typical method involves the nitration of 2-methylpyridine followed by chlorination. The reaction proceeds under mild conditions using concentrated sulfuric acid as a catalyst and nitric acid as the nitrating agent. Chlorine gas is then introduced to the intermediate product to achieve the final structure.