Patent ID: 6706338
Filing Date: 2004-03-16
Classification: C07B,C07C,C07D,C09K

Abstract:
A liquid-crystalline compound of formula I, whereinR1 is a straight-chain or branched alkyl radical having 1 to 15 C atoms which is unsubstituted, singly substituted by CN or CF3, at least singly substituted by halogen, wherein optionally one or more CH2 groups are substituted by â€”Oâ€”, â€”COâ€”, 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 directly linked together, R2 is CN, SF5, H, F, Cl, NCS, SCN or a straight-chain or branched alkyl radical having 1 to 15 C atoms which is unsubstituted, singly substituted by CN or CF3, at least singly substituted by halogen, wherein optionally one or more CH2 groups are substituted by â€”Oâ€”, â€”COâ€”, 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 directly linked together, A1, A2, A3 and A4 are each, independently, a 1,4-cyclohexenylene radical in which one or two non-adjacent CH2 groups are optionally replaced by â€”Oâ€” or â€”Sâ€”, a 1,4-phenylene radical in which one or two CH groups are optionally replaced by N, or a radical selected from the group consisting of piperidine-1,4-diyl, 1,4-bicyclo[2.2.2]octylene, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl, and 1,2,3,4-tetrahydronaphthalene-2,6-diyl, wherein each is optionally singly substituted or polysubstituted by halogen, Z1 and Z2 are each, independently, â€”COâ€”Oâ€”, â€”Oâ€”COâ€”, â€”CF2Oâ€”, â€”OCF2â€”, â€”CH2Oâ€”, â€”OCH2â€”, â€”CH2CH2â€”, â€”(CH2)4â€”, â€”C2F4â€”, â€”CF2CH2â€”, â€”CH2CF2â€”, â€”CF&boxH;CFâ€”, â€”CH&boxH;CHâ€”, â€”Câ‰¡Câ€” or a single bond, a is 0, 1 or 2, b is 0, 1 or 2, and c is 0, 1 or 2, wherein a+b+c&lE;2.