Intermolecular reactions of gold(I)-carbenes with furans by related mechanisms

The intermolecular gold(I)-catalyzed reactions of propargyl carboxylates, 1,6-enynes, or 7-substituted 1,3,5-cycloheptatrienes with furans afford cyclopentenones, polyenes or polycyclic compounds by related mechanisms initiated by the electrophilic addition of gold(I) carbenes to furans followed by ring-opening