申请人:Merck Patent Gesellschaft mit beschrankter Haftung
公开号:US05230827A1
公开(公告)日:1993-07-27
Derivatives of 2,3-Difluorobenzoic acid compounds of the formula I ##STR1## in which R.sup.1 and R.sup.2, independently of one another, are each an alkyl group having 1 to 15 C atoms, in which, in addition, one or two non-adjacent CH.sub.2 groups may be replaced by --O--, --CO--, --CH.dbd.CH-- and/or --C.tbd.C--, and A.sup.1 and A.sup.2, independently of one another, are each 1,4-phenylene which is unsubstituted or substituted by one or two fluorine atoms, and in which, in addition, one or two CH groups may be replaced by N, or are trans1,4-cyclohexylene, or one of the two A.sup.1 and A.sup.2 groups is alternatively a single bond, are suitable as components of liquid-crystalline phases.
公式I的2,3-二氟苯甲酸衍生物化合物,其中R1和R2各自独立地是具有1至15个碳原子的烷基基团,此外,一个或两个不相邻的CH2基团可以被--O--,--CO--,--CH.dbd.CH--和/或--C.tbd.C--所替换,而A1和A2各自独立地是未取代或取代一个或两个氟原子的1,4-苯基,此外,一个或两个CH基团可以被N所替换,或者是反式1,4-环己基,或者其中的A1和A2中的一个是单键,这些化合物适用于液晶相的组分。