1: 1.) n-BuLi/hexane / 1.) THF, r.t, 20 min; 2.) THF, -72 deg C, 2 h -> -20 deg C, 40 min 2: 1.) 70percent sodium bis(2-methoxyethoxy)aluminum hydride / tetrahydrofuran / 1.) 0 deg C, 1 h; 2.) r.t., 0.5 h View Scheme

Yield given. Multistep reaction;