Synthesis of Novel Organic–Inorganic Hybrid Cages via Cobalt-catalyzed Cyclotrimerization of Dimethylethynylsilyl Groups on a Silsesquioxane

Novel organic–inorganic hybrid cages composed of a half-caged silsesquioxane skeleton and a benzene ring have been synthesized by cobalt-catalyzed intramolecular cyclotrimerization of a silsesquioxane bearing three dimethylethynylsilyl groups.