公开(公告)号：DE4423044A1

公开(公告)日：1996-01-04

申请号：DE4423044

申请日：1994-07-01

Applicant: HOECHST AG

Inventor： SCHEROWSKY GUENTER PROF DR ,  HENSCHEL DIRK

IPC: C07D303/16 ,  C07D405/12 ,  C09K19/34 ,  C09K19/58 ,  C07D405/14 ,  C07D409/14

Abstract: 1-(3-Alkyloxiran-2-yl)alkyl esters (I) of mesogenic carboxylic acids are new. Pref. (I) are of formula (IA): R = (a) H, CN, F, Cl, -CF3, -CHF2, -CH2F, -OCF3, -OCHF2 or -OCH2F; (b) 1-20C alkyl (opt. with asymmetrical C atom), in which CH2 gp(s). may be replaced by -O-, -S-, -CO-, -CS-, -CH=CH-, -C?=C-, cyclopropan-1,2-diyl, -SiMe2-, 1,4-phenylene (Phe), trans-1,4-cyclohexylene (Cyc) or trans-1,3-cyclopentylene and/r with F, Cl, Br, -OR , -SCN, -OCN or -N3 substit(s).; or (c) (optically active or racemic) gps. of formula (IIA-R): R = linear 1-12 alkyl, in which CH2 gp(s). may be replaced by -O- and/or -CH=CH- without directly linked O atoms; R = H; 1-16C alkyl (opt. with an asymmetrical C atoms), in which 1 or more CH2 gps. may be replaced by -O- and/or -CH=CH-, without directly linked O atoms, and/or with 1 or more F or Cl substit(s).; or R + R = -(CH2)4- or -(CH2)5-; Y = Cl, F or CN; Z = -CO- or -CH2-; M = -O-, -S-, -CO-, -CO-O-, -O-CO-, -O-CO-O-, -CO-S-, -S-CO-, -CS-O-, -O-CS-, -S-CS-S-, -O-CS-O-, -S-CO-S-, -CS-, -CH2-O-, -O-CH2-, -CH2-S-, -S-CH2-, -CH=CH- or -C?=C-; A = Phe, pyridin-2,5-diyl (Pyd), naphthalen-2,6-diyl or bicyclo(2.2.2)octan-1,4-diyl, opt. with 1 or more F, Cl and/or CN substit(s).; pyrazin-2,5-diyl (Pyr), pyridazin-3,6-diyl, pyrimidin-2,5-diyl or thiophen-2,5-diyl or thiophen-2,4-diyl, opt. with one F, Cl and/or CN substit.; Cyc, opt. with 1 or 2 CN and/or Me substits.; (1,3,4)-thiadiazol-2,5-diyl; 1,3-dioxan-2,5-diyl (Dio); 1,3-dithian-2,5-diyl; piperazin-1,4- or -2,5-diyl; 1,3-dioxaborinan-2,5-diyl; or a B gp. (sic); a, b, c, d, e, f, g, h, i, k = 0 or 1 but b + d+ f+ h must = at least 2. Also claimed are liquid crystal (LC) mixts. contg. (I), esp. ferroelectric and antiferroelectric LC mixts.