1: 40.5 percent / xylene / 6 h / Heating 2: 50 percent / bis(triphenylphosphine)nickel dicarbonyl / bis-(2-methoxy-ethyl) ether / 12 h / Heating 3: 98 percent / lithium aluminum hydride / diethyl ether / 0.33 h / Ambient temperature 4: 81 percent / pyridinium chlorochromate / CH2Cl2 / 3 h / Ambient temperature View Scheme