Abstract: Direct conversion of alcohol tetrahydropyranyl (THP) ethers into the corresponding benzyl ethers can be conveniently performed by reaction with triethylsilane and benzaldehyde in the presence of a catalytic amount of trimethylsilyl trifluoromethanesulfonate (TMSOTf) in a one-pot procedure. Key words: THP ethers, benzyl ethers, triethylsilane, benzaldehyde, one-step conversion of protecting group