1: 81 percent / 4 Angstroem molecular sieves, silver triflate / CH2Cl2; toluene / 0.67 h / -40 °C 2: HOAc, H2 / Pd-C / ethanol 3: 79 percent / NaOMe / Ambient temperature View Scheme

lithium aluminium tetrahydride; aluminium trichloride in diethyl ether; dichloromethane 1 h; Heating;