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    • 70. 发明授权
    • Heterocyclic 1,2-difluorobenzene derivatives
    • 杂环1,2-二氟苯甲醛衍生物
    • US5209866A
    • 1993-05-11
    • US363904
    • 1989-05-15
    • Volker ReiffenrathJoachim KrauseAndreas WachtlerThomas Geelhaar
    • Volker ReiffenrathJoachim KrauseAndreas WachtlerThomas Geelhaar
    • G02F1/13C07D213/30C07D213/65C07D239/26C07D239/34C07D241/12C07D285/12C09K19/34
    • C07D213/30C07D213/65C07D239/26C07D239/34C07D285/12C09K19/3444C09K19/3458C09K19/3497
    • Heterocyclic 1,2-difluorobenzene derivatives of the formula I ##STR1## in which R.sup.1 and R.sup.2, in each case independently of one another, are an alkyl groups (sic) having 1-15 C atoms in which, in addition, one or more CH.sub.2 groups may be replaced by a divalent radical selected from the group comprising --O--, --S--, --CO--, --O--CO--, --CO--O--, --CH.dbd.CH-- and --C.tbd.C--, where two heteroatoms are not linked directly to one another,A.sup.1 and A.sup.2, in each case independently of one another, are a 1,4-phenylene group which is unsubstituted or monosubstituted or polysubstituted by fluorine, and in which, in addition, one or two CH groups may be replaced by N, or are a 1,3,4-thiadiazole-2,5-diyl group or a trans-1,4-cyclohexylene group,m and n are each 0 or 2,o is 0 or 1, andp is 0, 1 or 2,where (o+p) is 1, 2 or 3 and, in the case where p=2, the A.sup.2 groups and n may be identical or different with the proviso that at least one of the groups A.sup.1 and A.sup.2 is a 1,3,4-thiadiazole-2,5-diyl group or an unsubstituted or substituted 1,4-phenylene group in which one or two CH groups have been replaced by N,are suitable as components of liquid-crystalline phases.
    • 其中R 1和R 2各自独立地为具有1-15个C原子的烷基(sic),其中另外还有一个或多个 CH2基团可以被选自-O - , - S - , - CO-,-O-CO-,-CO-O-,-CH = CH-和-CB 3 -C 其中两个杂原子彼此不直接连接,A1和A2在每种情况下彼此独立地是未被取代的或被氟单取代或多取代的1,4-亚苯基,并且其中,另外还有一个或 两个CH基团可以被N取代,或者是1,3,4-噻二唑-2,5-二基或反-1,4-亚环己基,m和n各自为0或2,o为0或 1,p为0,1或2,其中(o + p)为1,2或3,并且在p = 2的情况下,A2基团和n可以相同或不同,条件是至少一个 基团A1和A2是1,3,4-噻二唑-2,5-二基或未取代的或 其中一个或两个CH基团被N取代的取代的1,4-亚苯基适合作为液晶相的组分。