Patent ID: 8124817

Claim:
A chiral compound of formula XIII wherein Y is a group of formulae XIV to XVII wherein one or two CH groups in the aromatic ring systems of formula XIII may each be replaced by N; m and n, independently of one another, are identical or different and are each 0 or 1, and the sum m+n is 1 or 2; X is a single bond, —CH 2 —CH 2 —, —CH═CH—, —C≡C— or L, independently of one another, are identical or different and are each R, F, Cl, Br, I, OH, OR, SH, SR, CN, NO 2 , NO, CHO, COOH, COOR, CONH 2 , CONHR, CONR 2 , CF 3 , NH 2 , NHR or NR 2 ; R is an alkyl, alkenyl or acyl group having up to 12 carbon atoms or an aryl group having 6 carbon atoms which is optionally substituted by an alkyl group having from 1 to 12 carbon atoms; a, b, c, d, e and f, independently of one another, are identical or different and are each 0, 1 or 2, the sum a+b+c+d+e+f is 1 to 8, and at least one of a, b, c, d, e and f is 2; and R 1 and R 2 independently of one another, are identical or different and are each H, F, Cl, CN, NCS, a straight-chain or branched, optionally chiral alkyl radical or alkoxy radical having from 1 to 12 carbon atoms or an alkenyl radical or alkynyl radical having from 2 to 8 carbon atoms, in each of which, in addition, one CH 2 group may be replaced by —O—, —CO—, —O—CO—, —COO— or —CH═CH— in such a way that heteroatoms are not linked directly to one another and/or one or more H may be replaced by halogen, wherein at least one of R 1 and R 2 is a branched alkyl radical or branched alkoxy radical having from 1 to 12 carbon atoms, in each of which, in addition, one CH 2 group may be replaced by —O—, —CO—, —O—CO—, —COO— or —CH═CH— in such a way that heteroatoms are not linked directly to one another and/or one or more H are each optionally replaced by halogen, and wherein in the case where m is 0 or n is 0, one CH 2 group in R 1 or R 2 is optionally replaced by one of the following groups: a) trans-1,4-cyclohexylene, in which, in addition, one or more non-adjacent CH 2 groups may each be replaced by —O— or —S—, b) a radical from the group consisting of 1,4-bicyclo[2.2.2]octylene, piperidine-1,4-diyl, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl and 1,2,3,4-tetrahydronaphthalene-2,6-diyl, or c) 1,4-cyclohexenylene, and in which the radicals a), b) and c) may also be substituted by CN and/or halogen.