Fremgangsmate for fremstilling av 5-(1-piperazinyl)-benzofuran-2-karboksamid ved hjelp av overgangsmetallkatalysert aminering, samt forbindelser som er mellomprodukter i fremgangsmaten

摘要

Process for the preparation of 5-(1-piperazinyl)benzofuran-2-carboxamide in which, as intermediate step, 5-bromosalicylaldehyde or one of its derivatives is reacted in a transition metal-catalysed amination with R<2>-piperazine, in which R<2 >is as defined in claim 1.