Patent ID: 7022857

Claim:
A process for preparing compounds of the formula (II), where the substituents R 1 to R 5 are each independently H, CH 3 , straight-chain or branched C 1 –C 8 -alkyl, CH(OC 1 –C 6 -alkyl) 2 , CH(C 1 –C 5 -alkyl)(OC 1 –C 5 -alkyl), CH 2 (OC 1 –C 5 -alkyl), CH(CH 3 )(OC 1 –C 5 -alkyl), C 1 –C 8 -alkoxy, N(C 1 –C 5 -alkyl) 2 , phenyl, substituted phenyl, aryl, heteroaryl, S(C 1 –C 5 -alkyl) or a radical C aryl, alkyl , and the symbols X 1 to 5 are each carbon with at least one X 1-5 being nitrogen or with at least one X 1-5 being nitrogen and X 1 R 1 and X 2 R 2 together are O, NH, N(C 1 –C 5 -alkyl), N(C═O—C 1 –C 5 -alkyl), N(SiR 3 ) 2 or S, or where neighboring radicals R 1 to R 5 form the following structural unit, where X 6 to X 9 and R 6 to R 9 have the same meaning as X 1 to X 5 and R 1 to R 5 and the radical C aryl, alkyl is straight-chain or branched, substituted or unsubstituted C 1 –C 8 -alkyl, 1-hydroxyalkyl having from 1 to 8 carbon atoms, CN, 2-hydroxyalkyl having from 2 to 5 carbon atoms, 3-hydroxyalkyl having from 3 to 5 carbon atoms, 1-NHR-, CH(OC 1 –C 5 -alkyl) 2 , C(C 1 –C 5 -alkyl)(OC 1 –C 5 -alkyl), CH 2 (OC 1 –C 5 -alkyl), CH(CH 3 )(OC 1 –C 5 -alkyl), C 1 –C 5 -alkoxy, N(C 1 –C 5 -alkyl) 2 , phenyl, substituted phenyl, aryl, heteroaryl, CO 2 H, CO 2 alkyl, (C═O) 0.5 , substituted 1-vinylalkyls, CH 3 —C(═O), R—C(═O) or CHO, wherein R is an alkyl having from 1 to 5 carbon atoms, which comprises reacting chloro- or fluoroaromatics of the formula (I) with carbon electrophiles and lithium metal.