摘要 |
The present invention relates to compounds of the general formula I in which the variables are each defined as follows: Z<SUP>1</SUP>, Z<SUP>2 </SUP>are each independently hydrogen, optionally substituted C<SUB>1</SUB>-C<SUB>20</SUB>-alkyl in which the carbon chain may be interrupted by oxygen atoms in ether function, sulfur atoms in thioether function or by nonadjacent imino or C<SUB>1</SUB>-C<SUB>4</SUB>-alkylimino groups, or reactive radicals by means of which polymerization can be brought about, A<SUP>1</SUP>, A<SUP>2 </SUP>are each independently spacers having from 1 to 30 carbon atoms, in which the carbon chain may be interrupted by oxygen atoms in ether function, sulfur atoms in thioether function or by nonadjacent imino or C<SUB>1</SUB>-C<SUB>4</SUB>-alkylimino groups, Y<SUP>1</SUP>, Y<SUP>2 </SUP>are each independently a chemical single bond, oxygen, sulfur, -CO-, -O-CO-, -CO-O-, -S-CO-, -CO-S-, -NR-CO- or -CO-NR-, Y<SUP>3</SUP>, Y<SUP>4 </SUP>are each independently a chemical single bond, oxygen, sulfur, -CR-CR-, -C≡C-, -CR-CR-CO-O-, -O-CO-CR-CR-, -C≡C-O-, -O-C≡C-, -CH<SUB>2</SUB>-CH<SUB>2</SUB>-, -CH<SUB>2</SUB>-O-, -O-CH<SUB>2</SUB>-, -CH<SUB>2</SUB>-S-, -S-CH<SUB>2</SUB>-, -CO-, -O-CO-, -CO-O-, -S-CO-, -CO-S-, -NR-CO-, -CO-NR-, -O-CO-O-, -O-CO-NR- or -NR-CO-O-, R is hydrogen or C<SUB>1</SUB>-C<SUB>4</SUB>-alkyl, Y<SUP>5 </SUP>independently of Y<SUP>1 </SUP>and Y<SUP>2</SUP>, is as defined therefor above or is -O-COO-, T<SUP>1</SUP>, T<SUP>2 </SUP>are divalent saturated or unsaturated, optionally substituted iso- or heterocyclic radicals, r, t are each independently 0 or 1 and s is 0, 1, 2 or 3, where the particular variables T<SUP>2 </SUP>and Y<SUP>3</SUP>, in the case that s>1, may be the same as one another or different from one another and both the hydrogen atoms in the 2,6-naphthyl radical and the hydrogen atoms bonded to carbon atoms in the variables Z<SUP>1</SUP>, Z<SUP>2</SUP>, A<SUP>1</SUP>, A<SUP>2</SUP>, Y<SUP>3</SUP>, Y<SUP>4</SUP>, R, T<SUP>1 </SUP>and T<SUP>2 </SUP>may be substituted partly or fully by halogen atoms. The invention further relates to a polymerizable or nonpolymerizable liquid-crystalline composition comprising one or more of the inventive compounds, to an oligomer or polymer obtainable by oligomerization or polymerization of a polymerizable inventive liquid-crystalline composition, to a process for printing or coating a substrate by applying a polymerizable inventive liquid-crystalline composition to the substrate and subsequent polymerization, to the use of the inventive liquid-crystalline composition or of the inventive oligomer or polymer for producing optical or electrooptical components, to a process for preparing selected inventive compounds, and to intermediates which are particularly suitable for preparing the selected inventive compounds.
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