Abstract
Abstract Platinum-catalyzed hydroarylation of alkynes was applied to thiophenes. Reaction of thiophenes with ethyl propiolate in trifluoroacetic acid in the presence of a K2PtCl4/AgOTf catalyst gave bis(substituted thienyl)propionates in good yields. The same Pt-catalyzed reaction with propiolic acid proceeded efficiently to provide bis(substituted thienyl)propionic acids in high yields.
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