1: H2 / Raney Ni / methanol 2: pTsOH / benzene / Heating 3: LiAlH4 / diethyl ether 4: 1.) Hg(OAc)2, 2.) NaBH4, 3.0 M NaOH / multistep reaction; solvent effect on regioselectivity of intramolecular alkoxymercuration View Scheme