1: 55 percent / lead tetraacetate / benzene / 1 h / Ambient temperature 2: 61 percent / benzene / 6 h / Heating 3: 60 percent / LiCl, 1,8-diazabicyclo<5.4.0>undec-7-ene / acetonitrile / 1 h / 20 °C 4: 100 percent / aluminum hydride / tetrahydrofuran / 2.5 h / 0 °C 5: 90 percent / CBr4, ethylenebis(diphenylphosphine) / CH2Cl2 / 2.5 h / -35 °C 6: 153 mg / acetonitrile / 1.5 h / 20 °C 7: 1.) n-BuLi, 2.) HMPA / 1.) THF, hexane, -100 deg C, 2 min, 2.) THF, hexane, from -100 deg C to RT 8: 61 percent / tetra-n-butylammonium fluoride / tetrahydrofuran / 15 h / Ambient temperature 9: potassium carbonate / methanol; H2O / 7.5 h / Ambient temperature 10: AcOH / H2O View Scheme

Multi-step reaction with 2 steps 1: 55 percent / lead tetraacetate / benzene / 1 h / Ambient temperature2: 61 percent / benzene / 6 h / Heating  

With  lead(IV) acetate in  benzene 1 h;  Ambient temperature;   

With  toluene-4-sulfonic acid; ethane-1,2-dithiol in  chloroform 3 h;  Heating;