Patent ID: 6541081
Filing Date: 2003-04-01
Classification: C07C,C09K

Abstract:
A liquid-crystalline ester compound of the formula I in whichR is an alkyl or alkenyl radical having 1 to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF3 or monosubstituted to perhalosubstituted by halogen, where one or more CH2 groups in these radicals, in each case independently of one another, are optionally replaced by â€”Oâ€”, â€”Sâ€”, â€”COâ€”, â€”COâ€”Oâ€”, â€”Oâ€”COâ€” or â€”Oâ€”COâ€”Oâ€” in such a way that O atoms are not linked directly to one another,A1 (a) is a trans-1,4-cyclohexylene radical in which, one or more non-adjacent CH2 groups are optionally replaced by â€”Oâ€” and/or â€”Sâ€”, (b) is a 1,4-phenylene radical, in which, in addition, one or two CH groups may be replaced by N, (c) is a 1,4-cyclohexenylene radical, (d) is a radical selected from the group consisting of 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, where the radicals (a), (b), (c) and (d) are optionally monosubstituted or polysubstituted by CN or fluorine, Z1 is â€”COOâ€”, â€”Oâ€”COâ€”, â€”CH2Oâ€”, â€”OCH2â€”, â€”C2H4â€”, â€”CH&boxH;CHâ€”, â€”CF2Oâ€”, â€”OCF2â€”, â€”Câ‰¡Câ€”, â€”(CH2)4â€”, â€”CH&boxH;CHC2H4â€”, â€”C2F4â€” or a single bond, L1 or L2 are each, independently of one another, H or F, Y is F, Cl, CN or an alkyl or alkoxy radical having 1 to 6 carbon atoms which is substituted by one or more halogen atoms, where one or more CH2 groups are optionally replaced by â€”Oâ€” or â€”CH&boxH;CHâ€” in such a way that O atoms are not linked directly to one another, and n is 0, 1 or 2, provided that, when Y&boxH;CN, L1 and/or L2 is F.