Patent ID: 7179915

Claim:
A process for preparing compounds (I) and (II) where A and A′ are the same or different at each instance and are N or C—H; X and X′ are the same or different at each instance and are —CH═CH—, —CR═CH—, —CR═CR—, N—H, N—R 1 , O, S, or Se; R and R′ are the same or different at each instance and are F, CL, Br, NO 2 , CN, a straight-chain or branched or cyclic alkyl or alkoxy group having from 1 to 20 carbon atoms in which one or more nonadjacent CH 2 groups are optionally replaced by —O—, —S—, —NR 1 —, or —CONR 2 — and in which one or more hydrogen atoms are optionally replaced by F, or an aryl or heteroaryl group having from 4 to 14 carbon atoms which are optionally substituted by one or more nonaromatic R radicals, and a plurality of R substituents, either on the same ring or on the two different rings, optionally form a further mono- or polycyclic ring system; R 1 and R 2 are the same or different and are H or an aliphatic or aromatic hydrocarbon radical having from 1 to 20 carbon atoms; a is 0,1,2,3, or 4; and b is 0,1, or 2; by reacting a compound (Ia), (IIa), (IIIa) where Y is F, Cl, Br, OH, or a straight-chain, branched, or cyclic alkoxy group having from 1 to 8 carbon atoms or a phenoxy group; R 3 and R 4 are the same or different at each instance and have the definition of R 1 and R 2 or CF 3 ; with a compound (Ib), (IIb) where the A, A′, X, X′, R, R′ radicals, a, and b are each as defined above, with addition of a Lewis acid.