1: 80 percent / p-TsOH / benzene / Ambient temperature 2: 86 percent / (PHO)2P(O)N3, Ph3P, (NCO2Et)2 / tetrahydrofuran / 0.17 h / Ambient temperature 3: 89 percent / 80percent aq. AcOH / 7 h / Ambient temperature 4: 92 percent / NaIO4 / dioxane; H2O / 0.17 h / Ambient temperature 5: 93 percent / H2CrO4 / acetone / 10 h / 0 °C 6: 54 percent / iodobenzenediacetate, I2 / CCl4 / 0.25 h / Heating; Irradiation 7: 19 percent / n-Bu3SnH / benzene / 1.5 h / Heating View Scheme