1: 85 percent / Et3N; p-acetamidophenylsulfonyl azide / acetonitrile / 0 - 20 °C 2: 63 percent / Rh(OAc)2 / benzene / 14 h / Heating 3: 70 percent / Et3N / CH2Cl2 / 0 - 20 °C 4: 86 percent / Pd(PPh3)4; LiCl / tetrahydrofuran / 17 h / Heating View Scheme

1: 85 percent / Et3N; p-acetamidophenylsulfonyl azide / acetonitrile / 0 - 20 °C 2: 86 percent / Rh(OAc)2 / benzene / 14 h / Heating View Scheme

1: 85 percent / Et3N; p-acetamidophenylsulfonyl azide / acetonitrile / 0 - 20 °C 2: 63 percent / Rh(OAc)2 / benzene / 14 h / Heating 3: 70 percent / Et3N / CH2Cl2 / 0 - 20 °C View Scheme

1: 85 percent / Et3N; p-acetamidophenylsulfonyl azide / acetonitrile / 0 - 20 °C 2: 86 percent / Rh(OAc)2 / benzene / 14 h / Heating 3: 91 percent / HBr / H2O / 12 h / 135 °C View Scheme

1: 85 percent / Et3N; p-acetamidophenylsulfonyl azide / acetonitrile / 0 - 20 °C 2: 86 percent / Rh(OAc)2 / benzene / 14 h / Heating 3: 98 percent / Et3N / CH2Cl2 / 6 h / 20 °C 4: 85 percent / aq. HCO2H; Pd(OAc)2(PPh3)2; Et3N / dimethylformamide / 1 h / 60 °C 5: 96 percent / aq. HBr / 12 h / 135 °C View Scheme

1: 85 percent / Et3N; p-acetamidophenylsulfonyl azide / acetonitrile / 0 - 20 °C 2: 86 percent / Rh(OAc)2 / benzene / 14 h / Heating 3: 98 percent / Et3N / CH2Cl2 / 6 h / 20 °C 4: 85 percent / aq. HCO2H; Pd(OAc)2(PPh3)2; Et3N / dimethylformamide / 1 h / 60 °C View Scheme