boron trifluoride diethyl etherate; sodium iodide in acetonitrile T=0°C; 8 h;

chloro-trimethyl-silane; triethylamine 1.) DMSO, dichloromethane, 0 deg C, 7 h; 2.) dichloromethane, 0 -> 30 deg C, 1 h; Yield given. Multistep reaction;