The boron-metal exchange reaction of (arylsilyl)boranes with alkyllithiums, potassium tert-butoxide, and methylmagnesium. bromide affords the corresponding silyllithium, silylpotassium, and silylmagnesium compounds, respectively. Especially, the boron-lithium exchange reaction occurs even in hydrocarbon solvents such as toluene and hexane as well as in THF.