Highly Regio- and Stereoselective Ruthenium(II)-Catalyzed Direct <i>ortho</i>-Alkenylation of Aromatic and Heteroaromatic Aldehydes with Activated Alkenes under Open Atmosphere

Abstract

Various aromatic and heteroaromatic aldehydes reacted with activated alkenes in the presence of a catalytic amount of [{RuCl(2)(p-cymene)}(2)], AgSbF(6), and Cu(OAc)(2)·H(2)O to give substituted alkene derivatives in a highly regio- and stereoselective manner. The corresponding alkene derivatives were further converted into unusual four-membered cyclic ketones or a polycyclic isochromanone derivative via a photochemical rearrangement. Notably, the catalytic reaction was conducted under an open atmosphere.