中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

106 records (took 0.024 seconds)

    61.
    发明专利
    未知

    公开(公告)号：NO922978L

    公开(公告)日：1992-07-28

    申请号：NO922978

    申请日：1992-07-28

    Applicant: HOECHST AG

    Inventor： ILLIAN GERHARD ,  MUELLER INGRID ,  HARADA TAKAMASA

    IPC: C07C13/16 ,  C07C15/02 ,  C07C43/20 ,  C07C69/92 ,  C07C69/94 ,  C07C69/96 ,  C07D20060101 ,  C07D213/30 ,  C07C69/86 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D285/12 ,  C07D405/12 ,  C07D417/12 ,  C07F7/08 ,  C09K19/08 ,  C09K19/20 ,  C09K19/34 ,  C09K19/42 ,  C09K19/46 ,  G02F1/13

    Abstract: PCT No. PCT/EP91/00129 Sec. 371 Date Jul. 24, 1992 Sec. 102(e) Date Jul. 24, 1992 PCT Filed Jan. 24, 1991 PCT Pub. No. WO91/11441 PCT Pub. Date Aug. 8, 1991.Geminal dimethylalkyl compounds, process for their preparation and their use in liquid-crystalline mixtures Geminal dimethylalkyl compounds of the formula (I) (I) in which: R1 is, for example, straight-chain or branched (with or without an asymmetric carbon atom) alkyl or alkenyl having 2 to 16 carbon atoms, A1, A2 and A3 are, for example, identical or different 1,4-phenylene, 1,4-cyclohexylene or pyrimidine-2,5-diyl, M1 and M2 are, for example, identical or different CO-O or O-CO, G is for example, identical or different straight-chain or branched alkylene having 1 to 16 carbon atoms, k, l, m and n are zero or 1, and R6 is straight-cain alkyl having 1 to 10 carbon atoms, can advantageously be employed in liquid-crystalline mixtures. In liquid-crystalline mixtures, said compounds result in a melting point depression, in a shift in the temperature limit of the Sc phase in ferroelectric mixtures and in other improvements of important electrooptical characteristic values.

    CHIRAL ARYL-2,3-EPOXYALKYL-ETHERS AND THE CORRESPONDING THIO COMPOUNDS THEREOF, AND THE USE THEREOF AS DOPES IN LIQUID-CRYSTAL PHASES
    62.
    发明专利
    CHIRAL ARYL-2,3-EPOXYALKYL-ETHERS AND THE CORRESPONDING THIO COMPOUNDS THEREOF, AND THE USE THEREOF AS DOPES IN LIQUID-CRYSTAL PHASES 未知

    公开(公告)号：CA1290755C

    公开(公告)日：1991-10-15

    申请号：CA548549

    申请日：1987-10-05

    Applicant: HOECHST AG

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

    IPC: C07D405/12 ,  C07D409/12 ,  C09K19/34 ,  C09K19/58 ,  G02F1/13

    Abstract: Chiral aryl-2,3-epoxyalkyl ethers or the corresponding thio compounds, and the use thereof as dopes in liquidcrystal phases The novel compounds are aryl-2,3-epoxyalkyl ethers or thioethers or the corresponding thiirane compounds having a mesogenic aromatic component and a chiral component having a three-membered heterocyclic ring, wherein, in the general formula (I), (I) the symbols have the following meaning: R1 = straight-chain or branched (C1-C12) alkyl, where one or two non-neighbouring CH2 groups may be replaced by O or S atoms, A = diazine-2,5-diyl or diazine-3,6-diyl, X and Y = O and/or S, and R2, R3 and R4, independently of one another = H, straightchain (C1-C10)alkyl or branched (C3-C10)alkyl, where R2, R3 and R4 are not simultaneously H. The compounds are preferably employed in tilted smectic liquid-crystal phases which they convert into ferroelectric liquid-crystal phases; they have high values for spontaneous polarization or they induce high values for spontaneous polarization.

    63.
    发明专利
    未知

    公开(公告)号：NO913774D0

    公开(公告)日：1991-09-26

    申请号：NO913774

    申请日：1991-09-26

    Applicant: HOECHST AG

    Inventor： ILLIAN GERD ,  WINGEN RAINER ,  MUELLER INGRID

    IPC: C07D239/26 ,  C07D239/34 ,  C07F7/10 ,  C09K19/34 ,  C09K19/40 ,  C09K19/42 ,  G02F1/13 ,  C07D239/00 ,  C09K

    Abstract: Cyclohexylphenylpyrimidines of the formula (I) anched, chiral or achiral alkyl or alkenyl having 2 to 16 carbon atoms, in which one or two nonadjacent -CH2- groups may be replaced by -0-, -S-, -CO-, -COO-, -OCO-, -Si(CH3)2- or -C(CH3)2-, and in which one or more hydrogen atoms of the alkyl or alkenyl radical may be replaced by fluorine atoms, and in which the terminal CH3 group of the alkyl may also be replaced by R2 is straight-chain or branched, chiral or achiral alkyl having 1 to 10 carbon atoms, are particularly suitable components for ferroelectric liquid-crystal mixtures since they result in favorable properties, such as, for example, high contrast, when used in electrooptical switching and display devices.

    67.
    发明专利
    未知

    公开(公告)号：NO912279D0

    公开(公告)日：1991-06-13

    申请号：NO912279

    申请日：1991-06-13

    Applicant: HOECHST AG

    Inventor： MUELLER INGRID ,  HEMMERLING WOLFGANG ,  WINGEN RAINER

    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)n?X, 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.

    68.
    发明专利
    未知

    公开(公告)号：DE3767821D1

    公开(公告)日：1991-03-07

    申请号：DE3767821

    申请日：1987-10-01

    Applicant: HOECHST AG

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

    IPC: C07D405/12 ,  C07D409/12 ,  C09K19/34 ,  C09K19/58 ,  G02F1/13

    Abstract: The novel compounds are aryl-2,3-epoxyalkyl ethers or thioethers or the corresponding thiirane compounds having a mesogenic aromatic component and a chiral component having a three-membered heterocyclic ring, wherein, in the general formula (1), (I) the symbols have the following meaning: R1=straight-chain or branched (C1-C12) alkyl, where one or two non-neighboring CH2 groups may be replaced by O or S atoms. A=diazine-2,5-diyl or diazine-3,6-diyl, X and Y=O and/or S, and R2, R3 and R4, independently of one another=H, straight-chain (C1-C10) alkyl or branched (C3-C10) alkyl, where R2, R3 and R4 are not simultaneously H. The compounds are preferably employed in tilted smectic liquid-crystal phases which they convert into ferroelectric liquid-crystal phases; they have high values for spontaneous polarization or they induce high values for spontaneous polarization.

Patent Agency Ranking