The selective cleavage of tetrahydropyranyl (THP), methoxymethyl (MOM), 1-ethoxyethyl (EE), 1-methyl-1-methoxyethyl (MME) and trimethylsilyl (TMS) ether groups with silica-aluminagels prepared by the sol-gel method has been investigated. The deprotection rate follows the order: TMS > MME ⪢ EE > THP ⪢ MOM. The selective deprotection of diol derivatives with mixed protecting groups was achieved efficiently