Gold(I)-catalyzed intra- and intermolecular alkenylations of β-yne-pyrroles: facile formation of fused cycloheptapyrroles and functionalized pyrroles.

An efficient gold(I)-catalyzed alkenylation of β-alkyne-substituted pyrroles is reported. The intramolecular reaction gives straightforward access to different types of seven-membered-ring-fused pyrroles with endo-selectivity, and the intermolecular reaction with alkynes provides functionalized pyrrole derivatives.