Liquid-crystalline compounds

Details Liquid-crystalline compounds Liquid-crystalline compounds

C - Chemistry, Metallurgy

07

C

C07C 43/225 (2006.01) C07C 17/26 (2006.01) C07C 17/269 (2006.01) C07C 17/354 (2006.01) C07C 25/00 (2006.01) C07C 25/18 (2006.01) C07C 25/24 (2006.01) C07C 39/24 (2006.01) C07C 39/42 (2006.01) C07C 43/174 (2006.01) C07C 43/192 (2006.01) C07C 49/813 (2006.01) C07C 63/72 (2006.01) C07C 69/76 (2006.01) C07C 69/96 (2006.01) C07C 255/37 (2006.01) C07C 323/09 (2006.01) C07D 239/26 (2006.01) C07D 319/06 (2006.01) C09K 19/12 (2006.01) C09K 19/30 (2006.01)

Patent

CA 2093212

- 86 - Abstract Liquid-crystalline compounds of the formula I I Image in which. R is H, an alkyl or alkenyl radical having 1 to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF3 or at least mono- substituted by halogen, it also being possible for one or more CH2 groups in these radicals each to be replaced, independently of one another, by -O-, -S-, Image , -CO-, -CO-O-, -O-CO- or -O-CO-O- in such a way that oxygen atoms are not linked directly to one another, Z1 and Z are each, independently of one another, -CH2CH2-, -CH=CH-, -C=C- or a single bond, and one of the radicals Z1 and Z is alternatively - (CH2)4- or -CH=CH-CH2Ch2- A and A1 are each, independently of one another, trans-1,4-cyclohexylene in which, in addi- tion, one or two non-adjacent CH2 groups may be replaced by -O-, or are 1,4-phenylene which is unsubstituted or monosubstituted or disubstituted by fluorine and/or C1 sand in which, in addition, one or two CH groups may be replaced by N, m is 0, 1, 2 or 3, o and s is 0, 1 or 2, where (s+o) is ? 2, W is -O-, -COO- or a single bond, Q is -O-, -Ch=CH- or a single bond, r is 1 to 7, t is 0 to 7, and Y is F, C1 CF3, OCF3, CHF2, OCHF2 or OCH2F, are suitable as components for liquid-crystalline media.

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