Oxidation of <i>g</i><i>em</i>-Borylsilylalkylcoppers to Acylsilanes with Air

1-Boryl-1-silylalkylcoppers react with molecular oxygen in the presence of pyridine to afford acylsilanes efficiently. The one-pot process consists of two reactions:  alkylation of 1-boryl-1-chloro-silylmethyllithium with Grignard reagents in the presence of copper(I) cyanide and aerobic oxidation of the alkylcopper species. This procedure enables us to access the divergent synthesis of acylsilanes.