1: 90 percent / CuI / Pd(PPh3)4 / toluene / 8 h / 80 °C 2: 69 percent / Me2BBr / CH2Cl2 / 2 h / -78 °C 3: 85 percent / TEMPO; TCCA / CH2Cl2 / 1 h / 25 °C 4: NaClO2; NaH2PO4; 2-methyl-2-butene / 2-methyl-propan-2-ol; H2O; tetrahydrofuran / 0.5 h / 25 °C 5: NaBH4; CeCl3*7H2O / methanol / 1 h / 0 °C View Scheme