TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: The reaction is carried out at a temperature of 20-60 degrees C. Preferred Components: The metal generates metal ions of charge greater than 1. The metal is a transition metal or a metal of column IIA, IIIA, IVA, VA or IIIB of the Periodic Table, preferably cadmium, magnesium, nickel, tin, zinc, aluminum, scandium, vanadium, cobalt, indium, gallium, titanium, lead, tungsten and samarium, bismuth, iron, or silver.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: (III) is trifluoromethane sulfonic acid or Nafion (RTM: Sulfonated tetrafluoroethylene based fluoropolymer-copolymer). (IV) is 1,1,1-trifluoro-N-(trifluoromethylsulfonyl)methanesulfonamide. The solvent from the solvent phase is a non-aqueous polar solvent, preferably dimethylformamide, dimethyl sulfoxide, methyl cyanide, phenyl cyanide, nitromethane, toluene, methanol and/or ethanol. The solvent from the solvent is water or a homogeneous mixture containing water. The substrate is present in the reaction medium at a molar concentration of 10-3 to 1 M. The frequency of ultrasound is 15 kHz to 2 MHz. The amplitude of ultrasound is greater than 6.5 mu m. The ultrasound is provided by an ultrasound probe. EXAMPLE - Triflic acid (0.375 g) was introduced under nitrogen atmosphere in a cylindrical glass reactor. Then distilled acetonitrile (2.5 ml) was added, where the molar concentration of triflic acid was 1 M. All solvents used in these syntheses were distilled, stored and collected under nitrogen atmosphere. Magnesium (0.305 g) was introduced in order to have acid-stoichiometric amounts of acid metal (i.e. 2 moles of triflic acid per mole of magnesium). This reagent was introduced into the Schlenk tube. The reaction mixture was added into a tub of an ultrasonic frequency of 35 KHz and a power of 70 W at 20 degrees C for 4 hours to obtain magnesium powder in suspension. The solution was filtered. The acetonitrile filtrate was evaporated to obtain a light brown powder (0.4073 g) identified by spectral analysis and elemental as magnesium triflate.