The distinct reactivity of 1,6-enynes in the presence of a trinuclear metal complex
activated by a carboxylic acid is presented. The triplatinum catalyst enables the
cyclization of the substrate and subsequent incorporation of a nucleophile in the
final product. In contrast, sequential cyclization/double bond shift occurs under
analogous conditions in the presence of the corresponding tripalladium complex.
Key words
enynes - palladium - platinum - clusters - aromaticity - cyclization