Patent ID: 6943275

Claim:
A process of preparing a compound of formula I comprising: a) reacting a compound of formula Ia with a base in the presence of carbondisulfide or a dialkyl trithiocarbonate of the formula [(R′S) 2 CS] and an alkylating agent (R′X), and b) reacting the resulting compound of formula Ib with a Grignard reagent R 1 MgX and/or R 2 MgX in the presence of a copper catalyst, wherein A 1 and A 2 are, independently of each other, an aromatic 5-ring, 6-ring or 7-ring which optionally contains one or more hetero atoms and is optionally substituted with one or more identical or different groups R, R is halogen or has one of the meanings of R 1 , R 1 and R 2 are, independently of each other, straight chain, branched or cyclic alkyl with 1-20 C-atoms, which may be unsubstituted, mono- or poly-substituted by F, Cl, Br, I or CN, optionally one or more non-adjacent CH 2 groups are replaced, independently from one another, by —O—, —S—, —NH—, —NR 0 —, —SiR 0 R 00 —, —CO—, —COO—, —OCO—, —OCO—O—, —SO 2 —, —S—CO—, —CO—S—, —CH═CH— or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another, optionally substituted aryl or heteroaryl, or P-Sp, R 0 and R 00 are, independently of each other, H or alkyl with 1-12 C-atoms, P is a polymerizable or reactive group, Sp is a spacer group or a single bond, X is halogen, and R′ is straight, branched or cyclic alkyl with 1-20 C-atoms, which may be unsubstituted, mono- or poly-substituted by F, Cl, Br, I or CN, optionally one or more non-adjacent CH 2 groups are replaced, independently from one another, by —O—, —S—, —NH—, —NR 0 —, —SiR 0 R 00 —, —CO—, —COO—, —OCO—, —OCO—O—, —SO 2 —, —S—CO—, —CO—S—, —CH═CH— or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another, or alkyl aryl with 1-20 C-atoms.