Williamson Ether Synthesis:S2 R-0R'C多：→R一9-R'+:8: OH OCH,CH (1)Na (②)CH,CH2-OTs cyclohexanol ethoxycyclohexane (92%) H OCH (1)NaH (②)CH,-13 3,3-dimethyl-2-pentanol 2-methoxy-3,3-dimethylpentane (90%)Williamson Ether Synthesis: SN2