1: AlCl3 / toluene / Ambient temperature 2: HCO2H, aq. H2O2 3: aq. KH2PO4, Na2S2O4 4: aq. NaOH View Scheme

1: AlCl3 / toluene / Ambient temperature 2: HCO2H, aq. H2O2 View Scheme

1: 70.2 percent / AlCl3 / toluene / 120 h / Ambient temperature 2: 84 percent / aq. NaOBr / dioxane / 1.) ice-cooling, 10 h, 2.) r.t., 5 h 3: 90.3 percent / H2SO4 / 48 h / Heating 4: 90.7 percent / LiAlH4 / diethyl ether / 15 h / Heating View Scheme

1: 70.2 percent / AlCl3 / toluene / 120 h / Ambient temperature 2: 84 percent / aq. NaOBr / dioxane / 1.) ice-cooling, 10 h, 2.) r.t., 5 h View Scheme

aluminium trichloride in toluene 120 h; Ambient temperature;