2,2,2-Trifluoroethyl iodide adds to terminal alkenes under free radical  conditions in good yields if the radical initiator is added in successive  portions to the reaction mixture. Reduction of the resulting secondary iodides  with sodium borohydride gives the corresponding trifluoroethyI-substituted  products in overall yields of 40-60%. The reaction seems to be restricted  to vinyl double bonds
                                    在自由基条件下,
2,2,2-三氟乙基碘与末端烯烃加成,如果将自由基
引发剂分批加入反应混合物,可以获得良好的产率。通过使用
硼氢化钠还原生成的二级
碘化物,总体产率在40-60%的范围内得到了相应的三
氟乙基取代产物。该反应似乎仅限于
乙烯双键上。