1: 95 percent / MsN3, Et3N 2: 62 percent / 5 mol percent of rhodium pivalate <Rh2(piv)4> / benzene / 1 h / Heating 3: 1.) O3, 2.) DMS / 1.) CH2Cl2, MeOH 4: tetrahydrofuran / Ambient temperature 5: 100 percent / TFA 6: 1.) diphenyl phosphorazidate, Et3N, 2.) aq. HCl / 1.) toluene, reflux, 2.) reflux, 2 h 7: 49 percent / NaOMe / methanol / Ambient temperature 8: 95 percent / tetrahydrofuran / Ambient temperature View Scheme