Gold(I)‐Catalyzed Cycloisomerization of ortho‐(Propargyloxy)arenemethylenecyclopropanes Controlled by Adjacent Substituents at Aromatic Rings

Gold(I)-catalyzed cycloisomerization of ortho-(propargyloxy)arenemethylenecyclopropanes afforded two different types of products, that is, products of methylenecyclopropane migration and cycloisomerization products of the methylenecyclopropane moiety, controlled jointly by electronic and steric effects of the adjacent substituents. Furthermore, the corresponding cycloisomerization products could be also produced in an enantiomerically enriched manner.