1: 92 percent / p-toluenesulfonic acid / benzene / 6 h / Heating 2: 1.) lithium aluminum hydride, 2.) hydrochloric acid / 1.) ether, 4 h, 2.) room temperature, 3 h View Scheme

1: 92 percent / p-toluenesulfonic acid / benzene / 6 h / Heating 2: 1.) lithium aluminum hydride, 2.) hydrochloric acid / 1.) ether, 4 h, 2.) room temperature, 3 h 3: 84 percent / pyridine / Ambient temperature View Scheme