1: 97 percent / conc. H2SO4, acetic acid / 1 h / 50 °C 2: 56 percent / dimethyldioxirane / acetone / 0 °C 3: 98 percent / K2CO3 / acetone / Heating 4: 85 percent / AlCl3 / acetonitrile / 0.5 h / Ambient temperature 5: 85 percent / K2CO3 / methanol / 1.5 h / Heating 6: 76 percent / H2 / 10percent Pd/C / methanol; ethyl acetate / Ambient temperature View Scheme