triethylsilane; indium tribromide in toluene T=100°C; 1 h; Inert atmosphere;

triethylsilane; boron trifluoride 1.) CH2Cl2, 0 deg C, 1 min, 2.) 0 deg C to r.t., 3 h; Yield given. Multistep reaction;

in benzonitrile Kinetics; 70 or 80°C;

in chloroform Kinetics; react. of Sn-compd. with ethane at 90, 30, 40 and 50°C for 24 h in a sealed tube; distn.;

1: 82 percent / m-chloroperbenzoic acid / CH2Cl2 / 30 h / Ambient temperature 2: 22 percent / BrCCl3, tert-butylalcohol, KOH / 2 h / Ambient temperature 3: Et3N / acetone; H2O / 16 h / 80 °C View Scheme