Abstract: This invention relates to a process for preparing functionalized aryl, heteroaryl, cycloalkenyl, or alkenyl compounds, by a transition-metal-catalyzed cross-coupling reaction of a substituted or unsubstituted aryl-X, heteroaryl-X, cycloalkenyl-X or alkenyl-X compound with an alkyl, alkenyl, cycloalkyl or cycloalkenyl halide, where X is a halide, diazonium, tosylate (p-toluenesulphonate), mesylate (methanesulphonate) or triflate (trifluoromethanesulphonate) leaving group.

Abstract: A process for preparing organic compounds of the general formula (I) R—R???(I), where R is a substituted or unsubstituted aromatic, heteroaromatic, cycloalkenylic or alkenylic radical and R? is a substituted or unsubstituted alkylic, alkenylic, cycloalkylic or cycloalkenylic radical, by reacting a corresponding compound of the general formula (II) R—X??(II), where X is chlorine, bromine, iodine, diazonium, mesylate (methanesulphonate), tosylate (p-toluenesulphonate) or triflate (trifluorosutphonate) and R is as defined for formula (I), with a corresponding compound of the general formula (III) R?—Y??(III), where Y is chlorine, bromine or iodine and R? is as defined for formula (I), wherein the reaction is carried out in the presence of a) stoichiometric amounts of elemental magnesium, based on the compound of the general formula (II), and b) catalytic amounts of a transition metal compound, based on the compound of the general formula (II), and, if appropriate, c) in the presence of a