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An efficient one‐step synthesis of piperidin‐2‐yl and pyrrolidin‐2‐yl flavonoid alkaloids was achieved in good to excellent yields by a highly regioselective phenolic Mannich reaction of chrysin with cyclic imines or iminium salts. Performing the reaction in a mixture of H2O/THF in the absence of an external reagent afforded the C‐6 alkylated product exclusively. The same reaction in water in the...
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