1: 45 percent / NaOH / tetrabutylammonium hydrogen sulphate / H2O / 8 h / Heating 2: 1.) n-BuLi / 1.) THF, hexane, -78 deg C, 2.) 0 deg C, then 23 deg C, 12 h View Scheme

n-butyllithium 1.) THF, hexane, -78 deg C, 2.) 0 deg C, then 23 deg C, 12 h; Yield given. Multistep reaction;