sulfuric acid in acetic acid T=100°C; 0.666667 h;

sulfuric acid; acetic acid 6 h;

1: 86 percent / NaNH2 / benzene; toluene / 1 h / 80 °C 2: 30 percent / trimethylbenzylammoniumhydroxide (Triton B) / dioxane; methanol / 15 h / Heating 3: 57 percent / concd H2SO4, CH3CO2H / 6 h View Scheme