1: 1.) n-BuLi / 1.) THF, cyclohexane, -78 deg C, 5 min, 2.) THF, cyclohexane, -78 deg C 2: aq. HCl / ethanol / 4 h / Heating View Scheme

1: 1.) n-BuLi / 1.) THF, cyclohexane, -78 deg C, 5 min, 2.) THF, cyclohexane, -78 deg C 2: aq. HCl / ethanol / 6 h / Heating View Scheme