TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: In the process, two different transition metal compounds are used as catalysts. The metal is present in the compound, preferably in oxidation step that differs by a unit from one another. The metals are further stabilized by ligands such as amine, phosphine, N-heterocyclic carbon, nitrile or olefin. The traces are removed by water during the reaction.Preferred Components: The metal is copper, palladium (both preferred), silver, platinum, manganese, iron, gold cobalt, nickel, molybdenum, rhodium, iridium or ruthenium. The transition metal compound is a copper (I) salt and palladium (II) acetylacetonate. The ligand is a cyclic amine. The ligand is optionally substituted by chelating cyclic amine such as phenanthroline, bipyridine or terpyridine. The two different metals are present in the compound, preferably in oxidation step that differs by two units from one another. The amount of catalyst is 0.001-100, preferably 0.01-5 mol.%, related to the total amount of electrophilic carbon. The reaction temperature is 80-200, preferably 120-160degreesC.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The carboxylic compound is of formula:(R-C(=O)-(O-))n M(m+)qY(p-)r.The counter ion (M(m+)) is metal cations such as lithium, sodium, potassium, magnesium, calcium, boron, aluminum, silver, copper, manganese, iron, cobalt, nickel, molybdenum or ruthenium. The electrophilic carbon is of formula (R1-X or (N2)+). The electrophilic carbon is a carbonyl derivative such as carboxylic acid chloride, carboxylic acid anhydride aldehyde, ketone, ester, alpha, beta-unsaturated aldehyde, alpha, beta-unsaturated ketone or alpha, beta-unsaturated ester.n,m,q,p = 1-6;r = 0-6;M = metal or organic compound;R,R1 = organic residue, preferably a straight, branched or cyclic 1-20C alkyl, 2-20C-alkenyl, 6-20C-aryl and heteroaryl selected from pyridine, pyrimidine, pyridazine, pyrazine, triazine, tetrazine, pyrrole, pyrazole, isoxazole, imidazole, oxazole, thiazole, thiophene, furan which may be further substituted by linear branched or cyclic 1-10C alkyl, 2-20C alkenyl, 6-10C aryl, 6-10C heteroaryl, 1-10C-alkoxy, 1-10C aryloxy, 1-10C alkylaminocarbonyl, 1-10C arylaminocarbonyl, 1-10C acyl, 1-10C dialkylamino, 1-10C arylamino, formyl, oxo, thio, hydroxy, carboxyl, NO2, CN, nitroso or halo such as F, Cl, Br or I;X = I, Br, Cl or pseudohalides (toluolsulfate, methylsulfonate, trifluorosulfonate, trifluorine acetate or carboxylate); andY1 = anion. EXAMPLE - A solution of ortho-nitrobenzoic acid was deprotonated with stoichiometric base. The resulting carboxylic acid salt (0.02 mmol) was mixed with 4-chloro-1-bromobenzol (1 mmol) in the presence of palladium (II) salt, optionally a triphenyl phosphine ligand (0.06 mmol) and/or additive (1.5 mmol) in N-methylpyrrolidone solvent (3 ml) and stirred at 120degreesC for 24 hours. The reaction mixture was precipitated by addition of additives and dried to give decarboxylated compound.