Facile access to boryltetralins and borylnaphthalenes via a cycloaddition using o-quinodimethanes.

Borylalkenes are found to serve as efficient dienophiles in a cycloaddition reaction with o-quinodimethanes, giving diverse boryltetralins, which are convertible into borylnaphthalenes via an oxidative aromatization.

Palladium-catalyzed disilylation of o-quinodimethanes: synthesis of 9- and 10-membered disilacarbocycles.

o-Quinodimethanes are efficiently inserted into a silicon-silicon bond of cyclic disilanes in the presence of a palladium-diphenyl-2-pyridylphosphine catalyst, giving 9- and 10-membered disilacarbocycles, that is, benzodisilonine and benzodisilecine.