1: sodium hydroxide / tetrahydrofuran / 20 h / 26 °C 2: N,N-dimethyl-formamide / 0.5 h / 100 °C View Scheme

1: aq. NaOH / 2 h / 0 °C 2: 1.) n-BuLi, LiC10H7, 2.) H2O / 1.) THF, hexane, -78 deg C, 1 h, 2.) THF, hexane, from -78 to 20 deg C, overnight View Scheme