manganese(IV) oxide; potassium hydroxide in diethyl ether; ethanol 1.5 h; dark;

1: 80 percent / Mg / diethyl ether; benzene / 1.) 0 deg C up to RT; 2.) RT, 1 h 2: 100 percent / sodium dichromate / acetic acid / 70 h / Heating 3: 80 percent / aq. KOH, KMnO4 / 1.5 h / Heating 4: 100 percent / thionyl chloride / 8 h / Heating 5: 78 percent / AlCl3 / 1.) 0 deg C up to RT; 2.) RT, 3 h 6: 79 percent / hydrazine hydrate / ethanol / 40 h / Heating 7: 45 percent / MnO2, KOH / diethyl ether; ethanol / 1.5 h / dark View Scheme

1: 100 percent / sodium dichromate / acetic acid / 70 h / Heating 2: 80 percent / aq. KOH, KMnO4 / 1.5 h / Heating 3: 100 percent / thionyl chloride / 8 h / Heating 4: 78 percent / AlCl3 / 1.) 0 deg C up to RT; 2.) RT, 3 h 5: 79 percent / hydrazine hydrate / ethanol / 40 h / Heating 6: 45 percent / MnO2, KOH / diethyl ether; ethanol / 1.5 h / dark View Scheme

1: 100 percent / thionyl chloride / 8 h / Heating 2: 78 percent / AlCl3 / 1.) 0 deg C up to RT; 2.) RT, 3 h 3: 79 percent / hydrazine hydrate / ethanol / 40 h / Heating 4: 45 percent / MnO2, KOH / diethyl ether; ethanol / 1.5 h / dark View Scheme

1: 78 percent / AlCl3 / 1.) 0 deg C up to RT; 2.) RT, 3 h 2: 79 percent / hydrazine hydrate / ethanol / 40 h / Heating 3: 45 percent / MnO2, KOH / diethyl ether; ethanol / 1.5 h / dark View Scheme

1: 80 percent / aq. KOH, KMnO4 / 1.5 h / Heating 2: 100 percent / thionyl chloride / 8 h / Heating 3: 78 percent / AlCl3 / 1.) 0 deg C up to RT; 2.) RT, 3 h 4: 79 percent / hydrazine hydrate / ethanol / 40 h / Heating 5: 45 percent / MnO2, KOH / diethyl ether; ethanol / 1.5 h / dark View Scheme

1: 79 percent / hydrazine hydrate / ethanol / 40 h / Heating 2: 45 percent / MnO2, KOH / diethyl ether; ethanol / 1.5 h / dark View Scheme

1: 80 percent / Mg / diethyl ether; benzene / 1.) 0 deg C up to RT; 2.) RT, 1 h 2: 100 percent / sodium dichromate / acetic acid / 70 h / Heating 3: 80 percent / aq. KOH, KMnO4 / 1.5 h / Heating 4: 100 percent / thionyl chloride / 8 h / Heating 5: 78 percent / AlCl3 / 1.) 0 deg C up to RT; 2.) RT, 3 h 6: 79 percent / hydrazine hydrate / ethanol / 40 h / Heating 7: 45 percent / MnO2, KOH / diethyl ether; ethanol / 1.5 h / dark View Scheme

1: 80 percent 2: Na2Cr2O7, acetic acid 3: 80 percent / KMnO4, aq. alkaline 4: thionyl chloride 5: 78 percent / AlCl3 6: 79 percent / hydrazine hydrate / ethanol 7: MnO2 / diethyl ether View Scheme