1.1: 92 percent / 4-dimethylaminopyridine / pyridine / 15 h 2.1: 80 percent / AgF / pyridine / 21 h / 20 °C 3.1: 78 percent / 3-chloroperoxybenzoic acid; NaHCO3 / CH2Cl2; H2O / 9 h / 20 °C 4.1: NaOMe / methanol / 24 h / 0 °C 4.2: Amberlite IR 120 (H+) / H2O / 4 h 5.1: 30 percent / aq. ammonia; H2 / Pd(OH)2/C / H2O / 96 h / 760 Torr View Scheme