How is 2-Ethyl-3-methylpyrazine (CAS: 15707-23-0) typically synthesized?

2-Ethyl-3-methylpyrazine is synthesized through the condensation of acetylacetone with ethyl acetate or methyl acetate. Commonly, this process involves the use of a catalyst such as p-toluenesulfonic acid to improve yield and selectivity. The reaction typically achieves a yield of 70-80%, and careful control of reaction conditions ensures high-quality product.