1: 65 percent / pyridinium dichromate / CH2Cl2 / 60 h 2: 20 mg / K2CO3, hydrazine hydrate 85percent, triethylene glycol / 150 deg C, 1 h, 220 deg C, 5.5 h View Scheme

With  potassium hydroxide in  methanol 48 h;  Ambient temperature;   

Multi-step reaction with 6 steps 2: 100 percent / H2 / platinum (10percent) on carbon / ethyl acetate / 8.5 h / Ambient temperature3: 95 percent / toluene-p-sulphonic acid / acetone; H2O / 3 h / Heating4: 100 percent / pyridine / 48 h5: BH3-THF / tetrahydrofuran / 0 deg C, 10 min, RT, 6 h6: 88 percent / 5percent KOH / methanol / 48 h / Ambient temperature