1: 1.) Mg, 1,2-dibromoethane, I2 / 1.) THF, toluene, from 70 to 80 deg C, 2.) THF, toluene, from 40 to 50 deg C 3: 95 percent / Et3N, trichlorosilane / xylene / 6.5 h / 80 - 130 °C View Scheme

1: 1.) Mg, 1,2-dibromoethane, I2 / 1.) THF, toluene, from 70 to 80 deg C, 2.) THF, toluene, from 40 to 50 deg C 3: 95 percent / Et3N, trichlorosilane / xylene / 6.5 h / 80 - 130 °C View Scheme

hydroxylamine in benzene 1) 5 deg C, 0.3 h; 2) 5 deg C --> room temperature, 0.5 h;

1: 54 percent / sodium azide / acetonitrile / 16 h / Ambient temperature 2: 33 percent / 4 h / 10 °C / Irradiation View Scheme