Fluorobenzene derivatives and liquid-crystalline medium

Details Fluorobenzene derivatives and liquid-crystalline medium Fluorobenzene derivatives and liquid-crystalline medium

C - Chemistry, Metallurgy

07

C

31/105, 260/297,

C07C 43/225 (2006.01) C07C 17/093 (2006.01) C07C 17/12 (2006.01) C07C 17/26 (2006.01) C07C 17/269 (2006.01) C07C 25/18 (2006.01) C07C 25/24 (2006.01) C07C 43/174 (2006.01) C07C 255/50 (2006.01) C07D 213/64 (2006.01) C09K 19/12 (2006.01) C09K 19/14 (2006.01) C09K 19/30 (2006.01) C09K 19/32 (2006.01) C09K 19/34 (2006.01)

Patent

CA 2040423

Fluorobenzene derivatives of the formula I, Image in which R is H, an alkyl or alkenyl radical of 1 to 15 carbon atoms which is unsubstituted or monosubstituted by CN or CF3 or at least monosubstituted by halogen, it being pos- sible for one or more CH2 groups in these radicals also to be replaced, in each case independently of one another, by -O-, -S-, Image , -CO-, -CO-O-, -O-CO- or -O-CO-O- in such a manner that O atoms are not linked directly to one another, A1 and A2, in each case independently of one another, are a (a) trans-1,4-cyclohexylene radical, in which one or more non-adjacent CH2 groups can also be replaced by -O- and/or -S-, (b) 1,4-phenylene radical, in which one or two CH groups can also be replaced by N, (c) radical from the group comprising 1,4-cyclo- hexenylene, 1,4-bicyclo(2.2.2)octylene, piperidine-1,4-diyl, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl and 1,2,3,4- tetrahydronaphthalene-2,6-diyl, it being possible for the radicals (a) and (b) to be substituted by CN or fluorine, Z1 and Z2, in each case independently of one another, are -CO-O-, -O-CO-, -CH2O-, -OCH2-, -CH2CH2-, -CH=CH-, -CC- (sic) or a single bond, one of the radicals Z1 and Z2 is also -(CH2)4- or -CH=CH-CH2CH2-, L is H or F, -65- m is 0, 1 or 2, X is F or Cl, and Q is a single bond, -CF2-, -OCF2- or -OCHF-, with the proviso that L is F, if Q is a single bond, are suitable as components of liquid-crystalline media.

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