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The synthesis of (4 or 5)-aryl-2-aroyl-1H-imidazoles and 2-hydroxy-3,6-diarylpyrazines from aryl methyl ketones via a cascade process of DMSO-HBr oxidation and Debus reaction was investigated. Owing to the simple starting materials, mild conditions, easy operation, high bioactivity of imidazole and pyrazine derivatives, this protocol has great potential in medicinal chemistry.

Synthesis of 2-aroyl-(4 or 5)-aryl-1H-imidazoles and 2-hydroxy-3,6-diarylpyrazines via a cascade process