1: With sodium bis(2-methoxyethoxy)aluminium dihydride in tetrahydrofuran; toluene T=0°C; 1 h; 2: With iodine in tetrahydrofuran; toluene T=-78 - 20°C;

1: 86 percent / BuLi / tetrahydrofuran / -78 °C 2: 1.) Red-Al, 2.) I2 / 1.) 0 deg C, ether, 2.) CH2Cl2, -78 deg C View Scheme