Convenient synthesis of fluorinated alkanes and cycloalkanes by hydrogenation of perfluoroalkylalkenes under ultrasound irradiation

The use of ultrasound dramatically decreased the reaction time of the hydrogenation of sterically hindered and electron poor perfluoroalkylalkenes. The reaction was performed at room temperature under hydrogen at atmospheric pressure. The yields are approximately the same for the various linear alkenes and higher in the cycloalkene series.