Preparation of substituted aromatic compounds

1 5 31815215152153151815215aryl, alkyl1 to 5 1-5 11 22 151532 1 5 6 9 6 9 1 5 1 5 A process for preparing compounds of the formula (II), where the substituents Rto Rare each independently H, CH, straight-chain or branched C-C-alkyl, CH(OC-C-alkyl), CH(C-C-alkyl)(OC-C-alkyl), CH(OC-C-alkyl), CH(CH)(OC-C-alkyl), C-C-alkoxy, N(C-C-alkyl), phenyl, substituted phenyl, aryl, heteroaryl, S(C-C-alkyl) or a radical C, and the symbols Xare each carbon or a maximum of two neighboring Xare nitrogen or XRand XRtogether are O, NH, N(C-C-alkyl), N(C═O-C-C-alkyl), N(SiR)or S, or where neighboring radicals Rto Rform the following structural unit, where Xto Xand Rto Rhave the same meaning as Xto Xand Rto Rwhich comprises reacting chloro- or fluoroaromatics of the formula (I) with carbon electrophiles and lithium metal.