Achieving closure: A platinum‐catalyzed cycloisomerization reaction (see scheme; [Pd/Cu]=[PdCl2(PPh3)2]/CuI, Ar=aryl, X=Br,I) is used for the efficient straightforward synthesis of biologically relevant pyrrolo‐[3,2‐c]azepin‐4‐one derivatives.
The synthesis of potentially bioactive pyrroloazepinones based on the catalytic intramolecularcyclization of alkyne-substituted 1H-pyrrole-2-carboxylic acid amides has been developed. In the presence of either H2PtCl6·6H2O at 120 °C or AuCl3 at room temperature pyrrolo[3,2-c]azepin-4-ones are formed.