chloro-trimethyl-silane; sodium iodide in acetonitrile 12 h; Heating;

Multi-step reaction with 2 steps 1: 74 percent / 30 percent HBr/AcOH / CH2Cl2 / 24 h / Ambient temperature2: 56 percent / triethylsilane, trifluoroacetic acid / CH2Cl2 / 1) RT, 6 h, 2) reflux, 6 h