1: 55 percent / LiCl, 1,8-diazabicyclo<5.4.0>undec-7-ene (DBU) / dimethylsulfoxide / 30 h / Ambient temperature 2: (Ph3P)3RhCl, Et3SiH / benzene / 0.58 h / 70 °C 3: aq. HF / acetonitrile / 0.83 h / Ambient temperature 4: 9.6 mg / NaBH4 / methanol / 0.45 h / -15 - -13 °C 5: 70 percent / p-TsOH*H2O / benzene / 1.08 h / Ambient temperature View Scheme