公开(公告)号：DE19627899A1

公开(公告)日：1997-01-23

申请号：DE19627899

申请日：1996-07-11

Applicant: HOECHST AG

Inventor： HORNUNG BARBARA DIPL ING ,  WINGEN RAINER DR ,  MORR MICHAEL DR ,  LOETZSCH DETLEF DR ,  HEPPKE GERD PROF DR

IPC: G02F1/13 ,  C07C69/773 ,  C07C69/92 ,  C07C69/94 ,  C07D239/26 ,  C07D239/34 ,  C07D285/12 ,  C07D303/02 ,  C07D307/10 ,  C09K19/20 ,  C09K19/34 ,  C09K19/58 ,  C07C69/90 ,  C07D405/12 ,  C07D417/12 ,  C09K19/08 ,  G09F9/35

Abstract: Cpds. of formula (I) with multiple methyl branching are new: R (-A -M )a(-A -M )b(-A -M )c(-A )-G(C H(CH3)-CH2) n-R2 (I); A -A = 1,4-phenylene (opt. contg. one or more H atoms replaced by F, Cl and/or CN), pyrazine-2,5-diyl (opt. contg. 1-2H atoms replaced by Fl, Cl, and/or CN), pyridazine-3,6-diyl (opt. contg. 1-2H atoms replaced by Fl, Cl and/or CN), pyridine-2,5-diyl (opt. contg. one or more H atoms replaced by F, Cl and/or CN), pyrimidine-2,5-diyl (opt. contg. 1-2H atoms replaced by F, Cl and/or CN), trans-1,4-cyclohexylene (opt. contg. 1-2H atoms replaced by CN and/or CH3) (1,3,4)-thiazole-2,5-diyl, 1,3-dioxane-2,5-diyl, 1,3-dithiane-2,5-diyl, 1,3-thiazole-2,4-diyl (opt. contg. 1 H atom replaced by F, Cl and/or CN), 1,3-thiazole-2,5-diyl (opt. contg. 1 H atom replaced by F, Cl and/or CN), thiophene-2,4-diyl (opt. contg. 1 H atom replaced by F, Cl and/or CN), thiophene-2,5-diyl (opt. contg. 1-2 H atoms replaced by F, Cl and/or CN) or naphthalene-2,6-diyl(opt. contg. one or more H atoms replaced by F, Cl, and/or CN); C = chiral C atom; G = -CO-O-CH20, -CO-O-, -O-CO-, -O-CO-O-CH2-, -O-CO-O-, -O-CH2-, O, S or single bond; G' = -CO-O-, -CH2-O- or single bond; M - M = -CO-O-, -O-CO-, -O-CO-O-, -CH2-O-, -O-CH2-, -CH2-S-, -S-CH2-, -CH=CH- or single bond; R = optically active or racemic gp. of formula (1)-(9) H, CN, F, Cl, CF3, CHF2, CH2F, OCF3, OCHF2, 1-30C alkyl (opt. contg. one or more CH2 gps. replaced by O, S, -CO-O-, -O-CO-, -O-CO-O-, CO, CS, -CH=CH-1 or -C?=C - cyclopropane-1,2-diyl -Si(CH3)2-, 1,4-phenylene, trans-1,3-cyclohexylene or trans-1,3-cyclopentylene), with the provision that O and/or S atoms are not bonded to each other, and/or \- one H atoms in the alkyl gp. may be replaced by F, Cl, Br, -OR3, -SCN, -OCN or N3 R = 1-6C n-alkyl; R ,R ,R = H or 1-16C alkyl ,opt. contg. one or more CH2 gps. replaced by O and/or -CH=CH- with the provision that the O atoms are non-adjacent, and one or more H atoms in the alky gp. may be replaced by F or Cl; R ,R = R or they may be -(CH2)4- or -(CH2)5- when bonded to an oxirane, dioxolane or tetrahydrofuran system; a-c = 0-1; (a+b+c) = 1-3; and n = 2-6; Also claimed are (i) liq. crystals mixts. (LCM) contg. one or more cpds. (I) and (ii) switch and/or display devices comprising carrier plates, electrode, \- one polariser, \- one orientation layer and (LCM).