Patent ID: 7973203
Filing Date: 2011-07-05
Classification: C07C,H01L

Abstract:
1. 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) 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 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 R 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.