1: 1) BuLi / 1) THF, hexane, -65 deg C, 20 min, 2) THF, -80 deg C, 2h 2: 1) KOCl / 1) dioxane, 2) THF 3: 1) 0.10M HCl, 2) 2.0M NaOH / 1) CH3CN, RT, 18h, 2) 70 deg C, 15 min View Scheme

1: 1.) 1.37 M n-BuLi / 1.) hexane, THF, 20 min, -70 deg C; 2.) hexane, THF, 12 h, -70 deg C 2: 0.25 N aq. HCl / 48 h / Ambient temperature View Scheme