 is caused to react with at least one compound of the general formula VII, in which    R0, R0, R0, R0, R0, R0, and R0, have the meanings stated above, in a reaction medium, optionally in the presence of at least one suitable coupling agent, optionally in the presence of at least one base,    or with at least one compound of the general formula VIII, in which    R0, R0, R0, R0, R0, R0, and R0 have the meanings stated above and LG stands for a leaving group, preferably for a chlorine radical or bromine atom, in a reaction medium, optionally in the presence of at least one base,    to form at least one compound of the general formula I