The novel potassium channel openers benzopyran-4-amides have been synthesized via palladium-catalyzed amidation of 4-bromobenzopyrans under an atmoshere in the presence of an equivalent of potassium iodide.
Synthesis of key intermedia tes benzopyran-4-carboxylic acids of new potassium channel openers benzopyran-4-amides via palladium-catalyzed hydroxycarbonylation
Key intermediates benzopyran-4-carboxylicacids of an important class of potassiumchannelopenersbenzopyran-4-amides have been synthesized viapalladium-catalyzedhydroxycarbonylation.