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  • Title: Palladium(II)-catalyzed direct intermolecular alkenylation of chromones.
    Author: Kim D, Hong S.
    Journal: Org Lett; 2011 Aug 19; 13(16):4466-9. PubMed ID: 21797199.
    Abstract:
    A new efficient method for the direct alkenylation of chromones via a palladium(II)-catalyzed C-H functionalization reaction was developed. The use of pivalic acid with Cu(OAc)(3)/Ag(2)CO(3) provided superior reactivity in the cross-coupling of chromones with alkene partners. This approach represents a significant advance over the existing two-step method and afforded various 3-vinylchromone derivatives, which are privileged structures in many biologically active compounds and versatile synthetic building blocks.
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