Synthesis process of derivatives of the general formula (I) in which R, R 'and R "independently represent one or more hydrogen, halogen (Cl, F, Br, I), cyano, nitro, linear or branched alkyl radicals 1 to 6 carbon atoms, linear or branched alkoxy of 1 to 6 carbon atoms, linear or branched alkyl carboxylate of 1 to 6 carbon atoms, trifluoromethyl, trifluoromethoxy and R "'represents a linear or branched alkyl or perfluoroalkyl group from 1 to 6 carbon atoms, or an aryl group optionally substituted with one or more radicals R "characterized in that a sulfonate of formula (II) is condensed in which R, R 'independently represent one or more hydrogen radicals, halogen (Cl, F, Br, I), cyano, nitro, linear or branched alkyl of 1 to 6 carbon atoms, linear or branched alkoxy of 1 to 6 carbon atoms, linear or branched alkyl carboxylate of 1 to 6 atoms carbon, trifluoromethyl, trifluoromethoxy and R1 represents a methyl, trifluoromethyl, C4Fg, CSF17 or phenyl radical optionally substituted with a methyl, bromine or nitro moiety with a sulfonamide of formula (III) in which R "represents one or more hydrogen, halogen radicals (Cl, F, Br, I), cyano, nitro, linear or branched alkyl of 1 to 6 carbon atoms, linear or branched alkoxy of 1 to 6 carbon atoms, linear or branched alkyl carboxylate of 1 to 6 carbon atoms, trifluoromethyl, trifluoromethoxy and R "'represents a linear or branched alkyl or perfluoroalkyl group of 1 to 6 carbon atoms, or an aryl group optionally substituted with one or more radicals R" in an organic solvent optionally in the presence of water, at a temperature between 20 ° C and 150º C in the presence of a mineral or organic base and a transfer agent and phase.Procedimiento de sintesis de derivados de fórmula general (I) en la que R, R' y R" representan independientemente entre si uno o varios radicales hidr6geno, halógeno (Cl, F, Br, I), ciano, nitro, alquilo lineal o ramificado de 1 a 6 atomos de carbono, alcoxi lineal o ramificado de 1 a 6 atomos de carbon
