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    • 11. 发明授权
    • Chiral esters of .alpha.-substituted phenylalkanoic acids and mesogenic
hydroxy compounds, and their use as a doping substance in liquid
crystal phases
    • α-取代苯基链烷酸和介晶羟基化合物的手性酯,以及它们在液晶相中作为掺杂物质的用途
    • US4874545A
    • 1989-10-17
    • US62062
    • 1987-06-12
    • Gerd HeppkeGunter ScherowskyChristian BahrLutz Lehmann
    • Gerd HeppkeGunter ScherowskyChristian BahrLutz Lehmann
    • C09K19/54C07C67/00C07C69/65C07C69/734C07C69/92C07C241/00C07C245/08C07C251/02C07C251/24C07C255/32C07C291/02C07C291/08C07D239/26C09K19/20C09K19/30C09K19/32C09K19/34G02F1/13
    • C07D239/26C09K19/0225C09K19/2028C09K19/3068C09K19/321C09K19/3402C09K19/3441C09K19/3463C09K19/3491C09K2019/3422
    • The novel compounds are chiral esters of .alpha.-substituted phenylalkanoic acids and mesogenic hydroxy compounds, the symbols in the general formula (I) ##STR1## being defined as follows: MO=molecular radical of a mesogenic hydroxy compound MOH after removal of one H, the radical MO being expressed by the general formula (II)R.sup.2 --(A.sup.1).sub.n1 --(B--).sub.n2 (A.sup.2).sub.n3 --O (II) whereR.sup.2 =straight-chain or branched (C.sub.1 -C.sub.12)-alkyl, it being possible for one or two non-adjacent CH.sub.2 groups to be replaced by O and/or S atoms, or, if n1=1, also F, Cl, Br, CN or CF.sub.3,A.sup.1, A.sup.2 =independently of one another 1,4-phenylene, diazine-2,5-diyl, diazine-3,6-diyl, 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, 1,3-dithiane-2,5-diyl or 1,4-bicyclo(2,2,2)octylene, it being possible for these groups also to be at least monosubstituted by F, Cl, Br, CN, CF.sub.3 and/or (C.sub.1 -C.sub.12)-alkyl (one or two non-adjacent CH.sub.2 groups may be replaced by O and/or S atoms),B=CO--O, O--CO, CH.sub.2 --CH.sub.2, OCH.sub.2, CH.sub.2 O, CH.dbd.N, N.dbd.CH, N.dbd.N, N(O).dbd.N,n1, n2, n3=independently of one another 0, 1 or 2, n1 and n3 not being 0 simultaneously,Y=an electron-attracting substituent,Z=H or an electron-attracting substituent, but not identical with Y, andR.sup.1 =benzyl or phenyl, it being possible for these groups to be substituted in the aromatic moiety in the same way as A.sup.1 and A.sup.2,with the exception of the compounds with Z=H, Y=F, Cl or Br, R.sup.2 =(C.sub.1 -C.sub.11)-alkoxy, A.sup.1 and A.sup.2 =phenyl, n.sup.1, and n.sup.3 =1 and n.sup.2 =0.The compounds are preferably used in tilted smectic liquid crystal phases, which are converted into ferroelectric liquid crystal phases by these compounds; they show high values of spontaneous polarization.
    • 新化合物是α-取代的苯基链烷酸和介晶羟基化合物的手性酯,通式(I)中的符号定义如下:MO =去除后的介晶羟基化合物MOH的分子量 一个H,基团MO由通式(II)R2-(A1)n1-(B-)n2(A2)n3-O(Ⅱ)表示,其中R2 =直链或支链(C1-C12) - 烷基,一个或两个不相邻的CH2基团可以被O和/或S原子替代,或者如果n1 = 1,则F,Cl,Br,CN或CF3,A1,A2独立地为一个 另外的1,4-亚苯基,二嗪-2,5-二基,二嗪-3,6-二基,1,4-亚环己基,1,3-二恶烷-2,5-二基,1,3-二噻烷-2,5 - 二基或1,4-二环(2,2,2)亚辛基,这些基团也可能至少被F,Cl,Br,CN,CF 3和/或(C 1 -C 12) - 烷基( 一个或两个不相邻的CH 2基团可以被O和/或S原子替代),B = CO-O,O-CO,CH 2 -CH 2,OCH 2,CH 2 O,CH = N,N = CH,N = N(O)= N,n1,n2,n3 =独立地 彼此0,1或2,n1和n3不同时为0,Y =吸电子取代基,Z = H或吸电子取代基,但不与Y相同,R1 =苄基或苯基,其为 除了具有Z = H,Y = F,Cl或Br的化合物,R2 =(C1-C11) - 烷氧基,A1(C1-C11) - 烷氧基)之外,这些基团可以以与A1和A2相同的方式在芳族部分被取代 而A2 =苯基,n1和n3 = 1,n2 = 0。 这些化合物优选用于通过这些化合物转化成铁电液晶相的倾斜的近晶液相; 他们表现出高度的自发极化。