1: C5H5NHBr3, pyridine / CH2Cl2 2: LiCl, Li2CO3, HMPA 3: EtONa / benzene 4: p-TsN3, triethylamine / diethyl ether 5: Irradiation 6: 100 percent / 5percent aq. NaOH / methanol / 6 h / 12 °C 7: triethylamine, (PhO)2P(O)N3 / benzene / 20 h / Heating 8: 18 h / Heating 9: 1.) NaHCO3, Me2SO4, 2.) NaOH / 1.) MeOH, 35 deg C, 40 h, 2.) MeOH, H2O, 40 deg C, 2 h View Scheme