Gold-Catalyzed Oxidative Cyclization of 4‑Allenyl-1-ynes with 8‑Methylquinoline Oxide

Abstract

Gold-catalyzed oxidative cyclizations of 4-allenyl-1-ynes with 8-methylquinoline oxide are described; diverse products are produced depending on the allenyl substituents. This reaction comprises initial formation of α-oxo gold carbenes that are attacked by allene to form allyl cation intermediates