Palladium Catalyzed Coupling of 5-Hydroxyuracil Trifluoromethanesulfonates (Triflates) with Alkenes and Alkynes

Abstract
Cross coupling of 5-hydroxyuracil triflates (1) with alkenes and alkynes in the presence of a palladium catalyst and triphenylphosphine affords 5-vinyluracils (2) and 5-alkylnyluracils (3), respectively, in good yields. Coupling of the triflate (1a) with organocopper reagents [R2Cu(CN)Li2] is also described.
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