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    31.
    发明专利
    未知

    公开(公告)号：DE3887048D1

    公开(公告)日：1994-02-24

    申请号：DE3887048

    申请日：1988-09-14

    Applicant: HOECHST AG

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

    IPC: C09K19/42 ,  C09K19/34 ,  C09K19/46 ,  C09K19/58 ,  G02F1/137 ,  G02F1/141

    Abstract: The novel liquid-crystalline mixtures (in the case of ferroelectric behavior they additionally contain an optically active compound as dope) are constructed from at least 2 mixture components of the general formula (I): (I) wherein n=6 to 14 and x=2 to 14. In addition, the mixtures may also contain cyclohexanecarboxylates of the general formula (II) (II) where R1=(C10-C16) or (C8-C14)alkoxy and R2=(C2-C9)alkyl, alkenyloxyphenylpyrimidine derivatives of the general formula (III) (III) where R3=(C7-C16)alkyl or (C6-C14)alkoxy and y=4-14, and/or alkoxyphenyl derivatives of alkylpyrimidine, of the general formula (IV) (IV) where m and p=6 to 14.

    34.
    发明专利
    未知

    公开(公告)号：DE3883090D1

    公开(公告)日：1993-09-16

    申请号：DE3883090

    申请日：1988-03-22

    Applicant: HOECHST AG

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

    IPC: G02F1/137 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C09K19/34 ,  G02F1/141

    Abstract: New 3-phenylpyrimidines are of formula (I). In (I), R1 and R2 independently = linear or branched alk(en)yl with k to 16 C atoms, with or without asymmetrical C atoms, in which one or more nonadjacent CH2 gps. can be replaced by -O- or -S-; A and B independently = gps. of formula (a) or (b); R1, 2 = R1 or R2; m and n = 0 or 1 but m and n not both = 1; provided that: a) if m = 0, k = 8 and the CH2 gp. in R2 next to the phenyl ring is replaced by -O-; b) if m = 1 and n = 0, k = 2; and c) is m = 0 and n = 1, k = 2 and the CH2 gp. in R2 next to the phenyl ring is replaced by -O-. The prepn. of (I) is also claimed. 29 cpds. are claimed, including (S)-2-heptylthio-5- (4-(6-methyloctyloxy) phenol-pyrimidine (IA).

    38.
    发明专利
    未知

    公开(公告)号：DE3832503A1

    公开(公告)日：1990-03-29

    申请号：DE3832503

    申请日：1988-09-24

    Applicant: HOECHST AG

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

    IPC: G02F1/13 ,  C07D317/24 ,  C07D317/30 ,  C07D317/32 ,  C07D405/12 ,  C07D405/14 ,  C09K19/34 ,  C09K19/54 ,  G09F9/35

    Abstract: Novel optically active esters of 5-ethyl- and 5-vinyl-1,3- dioxolane-4-carboxylic acid, their use as dopes in liquid-crystal mixtures, and liquid-crystal mixtures containing the novel esters. Optically active 1,3-dioxolanyl derivatives of the general formula (I) are suitable as dopes in liquid-crystal mixtures. The symbols in the general formula have the following meanings: R has an analogous structure to the moiety on the right of X in the general formula or is an alkyl or alkylene radical, which may be substituted, R and R are H or alkyl, which may also be substituted [R and R are alternatively, together with the C(2) of the dioxolane ring, a cycloaliphatic radical] R is vinyl or ethyl, with the proviso that at least one radical R is vinyl or ethyl if R is analogous to the moiety on the right of X in the formula (I), -A , -A and -A are aromatic, heterocyclic or aliphatic ring systems, -M and -M are -CO-O, -O-CO, -CH2CH2, -CH=CH, -CH2O,-OCH2 or -C=C, and X is O, S or O-CO-O. The particular advantage of the compound of the general formula (I) is that it is able to induce high twisting power in a cholesteric phase.

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