silver fluoride in acetonitrile 18 h; in the dark;

1: 60 percent / 6 M HCl / methanol / 1.) reflux, 3 h, 2.) room temp., 18 h 2: 5.2 g / 1.) Et3N, 2.) diphenyl phosphorazidate / 1.) room temp., 1 h, 2.) reflux, 18 h 3: 44 percent / 6 M HCl / tetrahydrofuran / 1.) 60 deg C, 3 h, 2.) room temp., 18 h 4: H2 / 20percent Pd/C / methanol / 18 h / 2585.7 Torr 5: 83 percent / Et3N / acetonitrile / 1.) reflux, 3 h, 2.) room temp., 18 h View Scheme