1: 85 percent / aq. KOH, aq. Bu4NOH / CH2Cl2 / 16 h / 25 °C 2: 1.) butyllithium / 1.) THF, hexane, a) -78 deg C, 6 h, b) from -78 deg C to RT, overnight, 2.) THF, hexane, RT View Scheme

n-butyllithium 1.) THF, hexane, a) -78 deg C, 6 h, b) from -78 deg C to RT, overnight, 2.) THF, hexane, RT; Yield given. Multistep reaction;