Regioselective Synthesis of Natural 6-Prenylpolyhydroxyisoflavone (Lupisoflavone) and Lupisoflavone Hydrate with Hypervalent Iodine Reagents

[摘要]：The Pd(0)-catalyzed coupling reaction of 6-iodotetraalkoxyisoflavone, which was obtained from the oxidative rearrangement of 3'-iodotetraalkoxychalcones, with 2-methyl-3-butyn-2-ol in heating condition affords 6-alkynylisoflavone. Hydrogenation of 6-iodotetraalkoxyisoflavone followed by acid-catalyzed dehydration with p-TsOH center dot H2O gave lupisoflavone.

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