1: HCl / diethyl ether / 0.75 h / 0 °C 2: TBAF / tetrahydrofuran / 22 h / Ambient temperature 3: 80 percent / ZnI2 / CHCl3 / 72 h / Ambient temperature 4: pyridine, DMAP / 22 h 5: NaBH4 / dimethylsulfoxide / 3 h / 85 °C 6: PhI(OOCCF3)2, H2O / ethanol / 0.17 h / Ambient temperature View Scheme