Vinyl compounds, and a liquid-crystalline medium

Details Vinyl compounds, and a liquid-crystalline medium Vinyl compounds, and a liquid-crystalline medium

C - Chemistry, Metallurgy

07

C

C07C 22/08 (2006.01) C07C 22/00 (2006.01) C07C 22/04 (2006.01) C07C 25/24 (2006.01) C07C 43/192 (2006.01) C07C 43/225 (2006.01) C07C 381/00 (2006.01) C07D 211/18 (2006.01) C07D 213/26 (2006.01) C07D 239/26 (2006.01) C07D 319/06 (2006.01) C07D 339/08 (2006.01) C09K 19/30 (2006.01)

Patent

CA 2088771

- 99 - Abstract Vinyl compounds of the formula 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 monosubstituted by halogen, it also being possible for one or more CH2 groups in these radicals to be replaced, in each case indepen- dently of one another, by -O-, -S-, Image , -CO-, -CO-O-, -O-CO- or -O-CO-O- in such a manner that oxygen atoms are not linked directly to one another, A1 and A2 are each, independently of one another, a (a) trans-1,4-cyclohexylene radical in which, in addition, one or more non-adjacent CH2 groups may be replaced by -O- and/or -S-, (b) 1,4-phenylene radical in which, in addition, one or two CH groups may be replaced by N, (c) radical from the group consisting of 1,4-cyclohexenylene, 1,4-bicyclo(2,2,2)- octylene, piperidine-1,4-diyl, naphthalene- 2,6-diyl, decahydronaphthalene-2,6-diyl and 1,2,3 t 4-tetrahydronaphthalene-2,6-diyl, where the radicals (a) and (b) may be substituted by CN or fluorine, Z1 and Z2 are each, independently of one another, -CO-O-, -O-CO-, -CH2O-, -OCH2-, -CH2CH2-, -CH=CH-, -C?C- or a single bond, and one of the radicals Z1 and Z2 iS alternatively -(CH2)4- or -CH=CH-CH2CH2-, - 100 - Q is a single bond, -O-, -CH2-CH2-, -C=C-, trans- CH=CH-, -COO- or -CH20-, X1 is H, F or Cl, X2 is F, Cl, CF3, or SF5, Y is H, F or Cl, r is 0 to 4, n is 0 or 1, and m is 0, 1, 2 or 3, with the proviso that, in the case where Y = H and Q = a single bond, X1 and x2 are Cl, are suitable as components of liquid-crystalline media.

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