1: 1) tBuOH, KOH; 2) O2 / 1) 1 h, room temp., DMF; 2) 30 min, ice-cooling 2: 80 percent / cyclohexanone, aluminium isopropoxide / toluene / 0.75 h / Heating View Scheme

1: 1) tBuOH, KOH; 2) O2 / 1) 1 h, room temp., DMF; 2) 30 min, ice-cooling 2: 80 percent / KOH, H2O / dimethylformamide / 12 h / Ambient temperature View Scheme