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Several heteroannulated pyridinones were prepared from the methyl esters of N-Boc-β,β-diheteroaryldehydroalanines by treatment with acetic acid. The latter were obtained by a bis-Suzuki coupling of a β,β-dibromodehydroalanine with heteroarylboronate compounds. The products were obtained in good yields and the cyclization reaction involves the nucleophilic attack of one of the heteroaromatic rings...
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