1.1: 83 percent / TFA 2.1: H2O2 / Na2WO4 2.2: 25 percent / NaHCO3 3.1: 60 percent / Et2NH 4.1: 63 percent / EDC; HOBt; N-ethylmorpholine 5.1: LiOH 6.1: 61 percent / EDC; HOBt; N-ethylmorpholine 7.1: LiOH 8.1: aq. HCl / acetic acid 9.1: pentafluorophenyl diphenylphosphinate; N-ethylmorpholine / dimethylformamide 10.1: TBAF; MS 4A / tetrahydrofuran / 24 h 11.1: 88 percent / TPAP; NMO; MS 4A / CH2Cl2 View Scheme