in toluene T=80°C; 50 h;

in toluene T=80°C; 50 h;

in toluene T=80°C; 50 h;

1: chloroform / 24 h / |Reflux; |Inert atmosphere 2: 4-toluenesulfonyl azide; 1,8-diazabicyclo[5.4.0]undec-7-ene / acetonitrile / 1.25 h / 0 - 20 °C / |Inert atmosphere 3: tetrabutyl ammonium fluoride / tetrahydrofuran / 0 °C / |Inert atmosphere 4: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dimethyl sulfoxide / 1 h / 20 °C / |Inert atmosphere 5: dirhodium tetraacetate / dichloromethane / 4 h / 20 °C / |Inert atmosphere View Scheme

in dichloromethane RefluxInert atmosphere;

in toluene T=80°C; 50 h;

in toluene T=80°C; 50 h;

in toluene T=80°C; 50 h;

in toluene T=80°C; 50 h;

in toluene T=80°C; 50 h;