Cobalt-Catalyzed Regioselective Intramolecular Hydrosilylation of Olefins to Access Sila-heterocycles

An efficient and straightforward cobalt-catalyzed regioselective intramolecular hydrosilylation of olefins has been developed. Regioselectivity is controlled by the choice of ligands and substrates, which operate through two distinct mechanisms. This method has been successfully applied to both terminal and internal alkenes and phenyl and alkyl tethers between the silane and the alkene, demonstrating its versatility across a broad range of substrates.