Chiral compounds

A chiral compound of formula I

• wherein
• X1, X2, Y1 and Y2 are independently of each other H;
• F;
• Cl;
• Br;
• I;
• CN;
• SCN;
• SF5;
• straight chain or branched alkyl with 1 to 25 C atoms which may be unsubstituted, mono- or poly-substituted by F, Cl, Br, I or CN, one or more non-adjacent CH2 groups optionally being replaced, in each case independently from one another, by —O—, —S—, —NH—, —NR0—, —C(═O)—, —C(═O)O—, —OC(═O)—, —OC(═O)—O—, —S—C(═O)—, —C(═O)—S—, —CH═CH—or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another;
• a polymerizable group;
• or cycloalkyl or aryl group with 1 to 20 C atoms that is optionally mono- or polysubstituted by L or by a polymerizable group,
• R0 is H or alkyl with 1 to 4 C atoms,
• x1 and x2 are independently of each other 0, 1 or 2,
• y1 and y2 are independently of each other 0, 1, 2, 3 or 4,
• B and C are independently of each other an aromatic or partially or fully saturated aliphatic six-membered ring, wherein one or more CH groups are optionally replaced by N and one or more CH2 groups are optionally replaced by O and/or S,
• one of W1 and W2 is -Z1-A1-R, and the other is R1, provided that W1 and W2 are not both H at the same time,
• U1 and U2 are independently of each other CH2, O, S, C(═O) or C(═S),
• V1 and V2 are independently of each other (CH2)n,
• n is an integer from 1 to 7,
• Z1 is —O—, —S—, —C(═O)—, —C(═O)—O—, —OC(═O)—, —O—C(═O)O—, —C(═O)—NR0—,
• —NR0—C(═O)—, —OCH2—, —CH2O—, —SCH2—, —CH2S—, —CF2O—, —OCF2—, —CF2S—, —SCF2—, —CH2CH2—, —CF2CH2—, —CH2CF2—, —CF2CF2—, —CH═N—,
• —N═CH—, —N═N—, —CH═CH—, —CF═CH —, —CH═CF—, —CF═CF—, —C≡C—, —CH═CH—C(═O)O—, —OC(═O)—CH═CH— or a single bond,
• A1 is a single bond,
• R is:
• H;
• F;
• Cl;
• Br;
• I;
• CN;
• SCN;
• OH;
• SF5;
• straight chain or branched alkyl with 1 to 25 C atoms which is unsubstituted, mono- or polysubstituted by F, Cl, Br, I or CN, one or more non-adjacent CH2 groups optionally being replaced, in each case independently from one another, by —O—, —S—, —NH—, —NR0—, —C(═O)—, —C(═O)O—, —OC(═O)—, —OC(═O)—O—, —S—C(═O)—, —C(═O)—S—, —CH═CH— or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another, and
• R1 is:
• H, F and straight chain alkyl with 1 to 12 C atoms wherein one or more H atoms may be replaced with F or CN, and one or more non-adjacent CH2 groups are optionally replaced, in each case independently from one another, by —O—, —S—, —NH—, —N(CH3)—, —CO—, —COO—, —OCO—, —OCO—O—, —S—CO—, —CO—S—, —CH═CH— or —C≡C—, in such a manner that oxygen atoms are not linked directly to one another.