potassium permanganate in water; tert-butyl alcohol

sulfuric acid T=115 - 120°C; 28 h;

1: 83 percent / dimethylformamide / 3 h / Heating 2: 76 percent / aq. H2SO4 / 28 h / 115 - 120 °C View Scheme

1: 77 percent / aq. HBr, NaNO2 / H2O / 1) ice-bath cooling, 2.5 h, 2) rt, overnight, 3) heating, 1 h 2: 83 percent / dimethylformamide / 3 h / Heating 3: 76 percent / aq. H2SO4 / 28 h / 115 - 120 °C View Scheme

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