1: 74 percent / PCC / CH2Cl2 / 16 h / Ambient temperature 2: 94 percent / BuLi / tetrahydrofuran; hexane / 5 h / Ambient temperature 3: 93 percent / hydrogen / 10percent Pd-C / cyclohexane / 20 h / 40 °C / 7500.6 - 11250.9 Torr 4: 1.) p-TsOH; 2.) hydrogen / 2.) 10percent Pd-C / 1.) benzene, reflux, 5 h; 2.) cyclohexane, 40 deg C, 13 bar, 20 h View Scheme

1: 94 percent / BuLi / tetrahydrofuran; hexane / 5 h / Ambient temperature 2: 93 percent / hydrogen / 10percent Pd-C / cyclohexane / 20 h / 40 °C / 7500.6 - 11250.9 Torr 3: 1.) p-TsOH; 2.) hydrogen / 2.) 10percent Pd-C / 1.) benzene, reflux, 5 h; 2.) cyclohexane, 40 deg C, 13 bar, 20 h View Scheme