| abstract |
The invention relates to chiral valerolactone derivatives of the formula I <IMAGE> I wherein R1 is C1-18 alkyl in which one or two non-adjacent -CH2 groups are optionally replaced by -O-, -CO-O-, -O-CO- or -S-, A is -H2-, -C-(CH3)2- or -CH2CH2, Sp is a spacer, which optionally contains a chiral carbon atom, Z0 is -COO-, -CH2O-, -CH2CH2-, -C 3BOND C- or -CH 3BOND CH-, MG is a mesogenic group, and n and p are each 0 or 1, and the use thereof as components of liquid-crystalline media for electrooptical displays. |