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    4.
    发明专利
    未知

    公开(公告)号：DE3925971A1

    公开(公告)日：1991-02-07

    申请号：DE3925971

    申请日：1989-08-05

    Applicant: HOECHST AG

    Inventor： ESCHER CLAUS DR ,  DUEBAL HANS-ROLF DR ,  HARADA TAKAMASA ,  HEMMERLING WOLFGANG DR ,  ILLIAN GERHARD DR ,  MUELLER INGRID DR ,  MURAKAMI MIKIO ,  OHLENDORF DIETER DR ,  WEGENER PETER DR ,  WINGEN RAINER DR

    IPC: C09K19/20 ,  C09K19/34 ,  C09K19/46

    Abstract: The novel liquid crystalline mixtures, which additionally contain an optically active compound as a dopant in the case of ferroelectric behaviour are based on at least 2 components of the general formula (I) and at least one carboxylic ester of the general formula (XI) or (XII) in which x is an integer of from 2 to 14 and n is an integer of from 6 to 14 in which a and b independently of one another may denote an integer of from 2 to 14 and -X- may denote an or an -O- group; in which A denotes, for example, pyrimidine-2,5-diyl, -Y- denotes, for example, -O- or -S-, -M- denotes, for example, -O- or -CH2-, -R denotes, for example, CH3 and c, d and e denote, for example, integers such as 2, 3 or 4. The mixtures, which may also contain further components, have advantageous properties for use in electrooptical display elements, such as low melting points and low crystallisation temperatures.

    5.
    发明专利
    未知

    公开(公告)号：DE3907601A1

    公开(公告)日：1990-09-13

    申请号：DE3907601

    申请日：1989-03-09

    Applicant: HOECHST AG

    Inventor： MUELLER INGRID DR ,  DUEBAL HANS-ROLF DR ,  ESCHER CLAUS DR ,  HEMMERLING WOLFGANG DR ,  ILLIAN GERHARD DR ,  MURAKAMI MIKIO ,  OHLENDORF DIETER DR ,  WINGEN RAINER DR

    IPC: G02F1/13 ,  C07D317/30 ,  C07D317/72 ,  C07D405/12 ,  C07D409/12 ,  C09K19/06 ,  C09K19/34 ,  C09K19/58

    Abstract: Optically active 1,3 dioxolane derivatives containing a mesogenic residue, of the general formula (I), are suitable as doping agents especially in ferro-electrical liquid crystal mixtures. The meanings of the symbols in the general formula are: R is constructed similarly to the part of the general formula to the right of X or an alkyl or alkylene residue which may be substituted; R , R , R = H or alkyl (R may also be alkenyl) which may also be substituted [R , R together with the C(2) of the dioxolane ring may be a cycloaliphate or a keto group]; j, l, n = zero, 1 or 2 and k, m = zero or 1 provided that if k = zero, n = zero also, if n = zero, m = zero also and l , -A , -A = aromatic, heterocyclic or aliphatic ring system; -M ,- M = -CO-O, -O-CO, -CH2CH2, -CH=CH, -CH2O, -OCH2, -C=C and X = CH=CH, CH2-CH2. The special advantage of the compounds with the general formula (I) is that they can induce a high twisting capacity in a cholesteric phase without substantially affecting in the smectic C* phase the value of the spontaneous polarisation already in the mixture. They are therefore suitable for pitch compensation, especially for ferro-electrical liquid crystal mixtures.

    6.
    发明专利
    未知

    公开(公告)号：DE3842062A1

    公开(公告)日：1990-06-28

    申请号：DE3842062

    申请日：1988-12-14

    Applicant: HOECHST AG

    Inventor： MUELLER INGRID DR ,  HEMMERLING WOLFGANG DR ,  WINGEN RAINER DR

    IPC: C07D237/08 ,  C07C249/02 ,  C07C251/16 ,  C07C251/30 ,  C07D213/53 ,  C07D239/26 ,  C07D241/12

    Abstract: The invention concerns the preparation of explosion-proof trimethine salts which are only slightly soluble in water and have the formula (I), in which: R is an aryl or a heteroaryl group, which may contain one or more substituents, and X is an anion-equivalent of a non-oxidizing acid group which is inert with respect to trimethine cation and forms trimethine salts which are only slightly soluble in water, by formylation of compounds of the formula (II): R-CH2-COOH, in which: R has the same meaning as in formula (I), under the conditions of the Vilsmeier-Haack reaction, followed by aqueous hydrolysis of the formylation products to form water-soluble primary trimethine salts, and reaction of the water-soluble primary trimethine salts in the aqueous reaction mixture with acids of the formula (III): (H)nX, in which: X has the same meaning as in formula (I) and n is a number from 1 to 3, or with water-soluble salts of such acids, in at least stoichometric proportions, and separation of the resulting trimethine salts of formula (I) which are only slightly soluble in water. Trimethine salts of formula (I) can be used as intermediates in the synthesis of heterocyclic compounds, particularly pyrimidines and pyridines.

    10.
    发明专利
    未知

    公开(公告)号：DE3638119A1

    公开(公告)日：1988-05-11

    申请号：DE3638119

    申请日：1986-11-08

    Applicant: HOECHST AG

    Inventor： WINGEN RAINER DR ,  DUEBAL HANS-ROLF DR ,  HEMMERLING WOLFGANG DR ,  MUELLER INGRID DR ,  OHLENDORF DIETER DR

    IPC: C04B35/64 ,  B22F3/14 ,  B22F3/15 ,  B23B27/14 ,  C04B35/10 ,  C04B35/56 ,  C04B35/58 ,  C04B35/645 ,  C04B35/80 ,  C04B35/81 ,  C04B41/50 ,  C04B41/52 ,  C04B41/87 ,  C04B41/89 ,  C07C20060101 ,  C07C69/712 ,  C07C69/773 ,  C07C69/92 ,  C07D239/26 ,  C07D239/34 ,  C07D405/12 ,  C09K19/20 ,  C09K19/54 ,  C09K19/58 ,  G02F1/13 ,  C07C69/90 ,  C09K19/04 ,  G02F1/137 ,  G09F9/35

    Abstract: PCT No. PCT/EP87/00653 Sec. 371 Date May 5, 1989 Sec. 102(e) Date May 5, 1989 PCT Filed Nov. 2, 1987 PCT Pub. No. WO88/03525 PCT Pub. Date May 19, 1988.Arylcarboxylates of 2-hydroxypropionates are known, amongst other compounds, as dopes for converting tilted smectic liquid-crystal phases into ferroelectric liquid-crystal phases. The novel chiral aryloxypropionates of the general formula are two-fold chiral and in which the symbols have the following meaning: R1 denotes a straight-chain alkyl or alkoxy radical having 1 to 16 carbon atoms or a branched alkyl or alkoxy radical having 4 to 16 carbon atoms, it being possible for one or two non-adjacent CH2 groups to be replaced by a sulfur and/or oxygen atom; A denotes one, two or three aromatic or heteroaromatic rings which are linked to one another directly or via one or two COO groups; B denotes a chemical bond or one or two aromatic or heteroaromatic rings which are linked directly to one another; R2 (a) if B is a chemical bond, denotes an alkyl radical having 2 to 10 carbon atoms which contains an asymmetrical carbon atom which is substituted by CH3, halogen or a COOC2H5 group, or an alkyl radical having 3 to 10 carbon atoms which contains two adjacent, asymmetrical carbon atoms of which one is substituted by halogen and the other by a CH3 group, or which, together with an O, form an oxirane ring, or (b) if B denotes one or two aromatic or heteroaromatic rings which are bonded directly to one another, denotes alkoxy radicals having the same number of carbon atoms and the same structure of the alkyl group as under (a).

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