1: 85 percent / 98percent H2SO4 / ethanol / 11 h / Heating 2: 90 percent / hydrogen / 10percent palladium on carbon / methanol / 6 h / 760 Torr / Ambient temperature 3: 85 percent / sodium / ethanol / 1.) 1 h, room temp.; 2.) 60 deg C, 20 h View Scheme

1: 85 percent / 98percent H2SO4 / ethanol / 11 h / Heating 2: 32 percent / MnO2 / benzene / 96 h / Heating View Scheme