1: 90 percent / LiAlH4 / diethyl ether / 3 h / Heating 2: CrO3 / pyridine / 2.5 h / Ambient temperature 3: 1.) NaH / 1.) DME, 30 min, room temperature; 2.) 6 h, room temperature. View Scheme

1: CrO3 / pyridine / 2.5 h / Ambient temperature 2: 1.) NaH / 1.) DME, 30 min, room temperature; 2.) 6 h, room temperature. View Scheme

sodium hydride 1.) DME, 30 min, room temperature; 2.) 6 h, room temperature.; Yield given. Multistep reaction;