n-butyllithium 1.) n-hexane, ether, -35 deg C, 1 h; 2.) 25 deg C, 2 h;

1: 79 percent / lithium aluminium hydride / tetrahydrofuran / 20 °C 2: 90 percent / 1.) nBuLi / 1.) n-hexane, ether, -35 deg C, 1 h; 2.) 25 deg C, 2 h View Scheme

1: 60 °C / Irradiation 2: 79 percent / lithium aluminium hydride / tetrahydrofuran / 20 °C 3: 90 percent / 1.) nBuLi / 1.) n-hexane, ether, -35 deg C, 1 h; 2.) 25 deg C, 2 h View Scheme

n-butyllithium 1.) Et2O, -35 deg C, 2.) Et2O, -35 deg C; Multistep reaction. Title compound not separated from byproducts;