Patent ID: 7462297

Claim:
A chiral dopant having a laterally alkylated phenyl unit of formula I: in which: Q* is K is —CH 2 —, —O—, —CH 2 CH 2 —, —OCH 2 —, —CH 2 O—, —OCF 2 —, —CF 2 O—, —C≡C—, —CH═CH— or a single bond, L and M are alkyl, cycloalkyl, O-alkyl, or aryl, where L must be different from M, R is —H, F, Cl, or an alkyl radical having 1 to 12 carbon atoms or alkenyl radical having 2 to 12 carbon atoms, which is unsubstituted or at least monosubstituted by halogen, and in which one or more non-adjacent —CH 2 — groups are optionally replaced by —O— or —S— and/or —C≡C—, A are, independently of one another, a single bond, 1,4-phenylene, in which one or more H atoms are optionally replaced by F, 1,4-cyclohexylene, in which one or two CH 2 groups are optionally replaced by —O—, or 1,4-bicyclo[2.2.2]octanyl, Z are, independently of one another, a single bond, —CH 2 -CH 2 —, —O—CH 2 —, —CH 2 —O—, —CF 2 —O—, —O—CF 2 —, —CF 2 -CF 2 - or —C≡C—, V and W are, independently of one another, H, F, Cl, or a linear or branched alkyl or alkoxy having 1 to 12 carbon atoms which is unsubstituted or monosubstituted or polysubstituted by halogen, X and Y are, independently of one another, H, F, Cl, trimethylsilyl, or a linear or branched alkyl or alkoxy having o or p carbon atoms which is unsubstituted or monosubstituted or polysubstituted by halogen, o and p are, independently of one another, identical or different and are integers in the range from 1 to 12, and n is 1 to 3, with the proviso that X and/or Y is/are either an unsubstituted or halogen-substituted alkyl or alkoxy radical having o or p carbon atoms, where the sum o+p is ≧2, or a trimethylsilyl radical.