1: 1.) NaH / 1.) THF, hexane, RT, overnight, 2.) THF, hexane, RT, 24 h 2: 1.) LDA or NaH / 1.) THF, cyclohexane, 0 deg C, 20 min, 2.) THF, cyclohexane, RT, 18 h View Scheme

lithium diisopropyl amide 1.) THF, cyclohexane, 0 deg C, 20 min, 2.) THF, cyclohexane, RT, 18 h; Multistep reaction;