1: 1.) n-butyllithium / 1.) ether, hexane, -77 deg C, 15 min; 2.) ether, room temp., 1 h 2: 1.) n-butyllithium / 1.) THF, hexane, <-5 deg C, 5 min; 2.) THF, room temp., 1 h View Scheme

n-butyllithium 1.) THF, hexane, <-5 deg C, 5 min; 2.) THF, room temp., 1 h; Yield given. Multistep reaction;