1: 1.) (C6H11)2NMgBr / 1.) THF, -50 deg C, 2.) 0 deg C 2: 1.) NaOMe, 2.) Zn/AcOH, conc. HCl / 1.) CH2Cl2, MeOH, room temperature 2.) THF, room temperature 3: LiSPr / hexamethylphosphoric acid triamide / Ambient temperature View Scheme