1: 88 percent / PDC / CH2Cl2 / 6 h / Heating 2: 97 percent / H2 / 5percent Pd/C / ethanol / 3 h / 760 Torr View Scheme

1: 88 percent / PDC / CH2Cl2 / 6 h / Heating 2: 97 percent / H2 / 5percent Pd/C / ethanol / 3 h / 760 Torr 3: 77 percent / pyridine / CH2Cl2 / 1 h / Ambient temperature 4: TiCl3/C8K / 1,2-dimethoxy-ethane / 1 h / Heating View Scheme

dipyridinium dichromate in dichloromethane 6 h; Heating;