1: 89 percent / 2 h / Heating 2: 66 percent / 30percent aq. H2O2 / acetic acid / 2 h / Heating 3: 1.) NaH / 1.) 1,2-dimethoxyethane, 5 min, 2.) reflux, 2 h View Scheme

1: 93 percent / thionyl chloride / toluene / 2 h / 80 °C 2: 89 percent / 2 h / Heating 3: 66 percent / 30percent aq. H2O2 / acetic acid / 2 h / Heating 4: 1.) NaH / 1.) 1,2-dimethoxyethane, 5 min, 2.) reflux, 2 h View Scheme

1: 66 percent / 30percent aq. H2O2 / acetic acid / 2 h / Heating 2: 1.) NaH / 1.) 1,2-dimethoxyethane, 5 min, 2.) reflux, 2 h View Scheme

sodium hydride 1.) 1,2-dimethoxyethane, 5 min, 2.) reflux, 2 h; Yield given. Multistep reaction;