1: 4M NaOH, 30percent H2O2 / 2-methyl-propan-2-ol / 3 h / 15 - 20 °C 2: 49 percent / 4-dimethylaminopyridine, triethylamine / CH2Cl2 / 15 h / Ambient temperature 5: 100 percent / H2 / platinum (10percent) on carbon / ethyl acetate / 8.5 h / Ambient temperature 6: 95 percent / toluene-p-sulphonic acid / acetone; H2O / 3 h / Heating 7: 100 percent / pyridine / 48 h 8: BH3-THF / tetrahydrofuran / 0 deg C, 10 min, RT, 6 h 9: 88 percent / 5percent KOH / methanol / 48 h / Ambient temperature 10: 65 percent / pyridinium dichromate / CH2Cl2 / 60 h 11: 20 mg / K2CO3, hydrazine hydrate 85percent, triethylene glycol / 150 deg C, 1 h, 220 deg C, 5.5 h View Scheme

1: With boron trifluoride diethyl etherate in dichloromethane T=20°C; 2 h; 2: With water in dichloromethane