Patent ID: 7973203

Claim:
A process for the preparation of trans-indenofluorene compounds of the formula (Ia) or cis-indenofluorene compounds of the formula (Ib) which comprises reacting at least one compound of the formula (IIa) or (IIb) respectively with at least one compound of the formula (III) R-Hal formula (III) in the presence of at least one organic base and at least one organic, polar, aprotic solvent, wherein said organic base is a metal alkoxide, and wherein R′ is identical or different on each occurrence and stands for hydrogen, fluorine, chlorine, bromine, iodine, a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 40 C atoms, a branched alkyl, alkoxy or thioalkoxy group having 3 to 40 C atoms, a cyclic alkyl, alkoxy or thioalkoxy group having 3 to 40 C atoms or an alkenyl group having 2 to 40 C atoms, where the above-mentioned alkyl, alkoxy, thioalkoxy or alkenyl radicals are optionally substituted by one or more radicals R 2 and where one or more non-adjacent CH 2 groups is optionally replaced by —R 2 C═CR 2 —, —C≡C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , NR 2 , C═O, P(═O)R 2 , C═S, C═Se, C═NR 2 , —O—, —S— or —CONR 2 — and where one or more H atoms is optionally replaced by F, or an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms, which is optionally substituted by one or more radicals R 2 , or an aryloxy or heteroaryloxy group having 5 to 40 aromatic ring atoms, which is optionally substituted by one or more radicals R 2 , or a diarylamino group having 12 to 40 aromatic ring atoms, which is optionally substituted by one or more radicals R 2 , or a combination of these systems; two or more substituents R 1 optionally form a mono- or poly-cyclic, aliphatic or aromatic ring system, Hal is a leaving group, R is identical or different on each occurrence and stands for a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 40 C atoms or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 40 C atoms, each of which is optionally substituted by one or more radicals R 2 , where one or more non-adjacent CH 2 groups is optionally replaced by —R 2 C═CR 2 —, —C≡C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , NR 2 , C═O, C═S, C═Se, C═NR 2 , —O—, —S— or —CONR 2 — and where one or more H atoms is optionally replaced by F, or an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms, which is optionally substituted by one or more radicals R 2 , or an aryloxy or heteroaryloxy group having 5 to 40 aromatic ring atoms, which is optionally substituted by one or more radicals R 2 , or a combination of these systems, R 2 is on each occurrence, identically or differently, H or an aliphatic or aromatic hydrocarbon radical having 1 to 20 C atoms, n is independently of one another, an integer 0, 1 or 2, and m is independently of one another, an integer 0, 1, 2, 3 or 4.