Chiral compounds

A process comprising alkylating or acetalizing a compound of the formula

• to produce a compound of the formula
• wherein A11, Al2, A21, A22 each, identically or differently, denote 1,4-phenylene, 1,4-cyclohexylene, naphthalene-2,6-diyl, it being possible for all these groups to be unsubstituted, mono- or polysubstituted with L31,
• R11, R21, R31 each, identically or differently, denote H, F, Cl, CN, straight chain or branched alkyl with up to 7 C atoms which may be unsubstituted, mono- or polysubstituted by F, Cl, or CN, it being also possible for one or more non-adjacent CH2 groups to be replaced, in each case independently from one another, by —O—, —CO—, —C(O)O—, —OC(O)—, —OCO—O—, —SC(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, or a polymerizable group,
• Z11, Z12,
• Z21 and Z22 each, identically or differently, denote —O—, —CO—, —C(O)O—, —OC(O)—, —O—C(O)O—, —OCH2—, —CH2O—, —CF2O—, —OCF2—, —CH2CH2—, —CF2CH2—, —CH2CF2—, —CF2CF2—, —CH═CH—, —CF═CH—, —CH═CF—, —CF═CF—, —C≡C—, or a single bond,
• Z31 denotes —O—, —OC(O)—, —OCH2—, —CH2CH2—, —CF2CH2—, —CH2CF2—, —CF2CF2— or a single bond,
• L11, L21, L31 each, identically or differently, denote F, Cl, or alkyl or alkoxy with 1 to 7 C atoms, wherein one or more H atoms may be substituted by F or Cl,
• m1, m2 each, identically or differently, is 0, 1, 2 or 3,
• r1, r2, s1 each, identically or differently, are 0, 1 or 2, and
• s denotes 0 or 1.