Patent ID: 6723866
Filing Date: 2004-04-20
Classification: C07D,C09K

Abstract:
A liquid-crystalline compound of the formula I in whichR1 is an alkyl radical having from 1 to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF3 or mono-to per halo-substituted by halogen, where one or more CH2 groups in these radicals are optionally replaced by â€”Oâ€”, â€”Sâ€”, â€”CH&boxH;CHâ€”, â€”Câ‰¡Câ€”, â€”OCâ€”Oâ€” or â€”Oâ€”COâ€” in such a way that O atoms are not linked directly to one another, A1 and A2 are each, independently of one another, a) a 1,4-cyclohexenylene or 1,4-cyclohexylene radical, in which one or two non-adjacent CH2 groups are optionally replaced by â€”Oâ€” or â€”Sâ€”, b) a 1,4-phenylene radical, in which one or two CH groups are optionally replaced by N, c) a radical selected from the group consisting of piperidine-1,4-diyl, 1,4-bicyclo[2.2.2]octylene, phenanthrene-2,7-diyl, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl and 1,2,3,4-tetrahydronaphthalene-2,6-diyl, where the radicals a), b) and c) are optionally monosubstituted or polysubstituted by halogen atoms, Z1 and Z2 are each, independently of one another, â€”COâ€”Oâ€”, â€”Oâ€”COâ€”, â€”CF2Oâ€”, â€”OCF2â€”, â€”CH2Oâ€”, â€”OCH2â€”, â€”CH2CH2â€”, â€”(CH2)4â€”, â€”C2F4â€”, â€”CH2CF2â€”, â€”CF2CH2â€”, â€”CF&boxH;CFâ€”, â€”CH&boxH;CHâ€”, â€”Câ‰¡Câ€” or a single bond, with the proviso that at least one of Z1 and Z2 is â€”CF2Oâ€” or â€”OCF2â€”, a is 0, 1 or 2, b is 1 or 2, and L1, L2 and L3 are each, independently of one another, H, F or Cl.