EP0260275A1 - Optisch aktive verbindungen - Google Patents
Optisch aktive verbindungenInfo
- Publication number
- EP0260275A1 EP0260275A1 EP87901017A EP87901017A EP0260275A1 EP 0260275 A1 EP0260275 A1 EP 0260275A1 EP 87901017 A EP87901017 A EP 87901017A EP 87901017 A EP87901017 A EP 87901017A EP 0260275 A1 EP0260275 A1 EP 0260275A1
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- EP
- European Patent Office
- Prior art keywords
- optically active
- coo
- groups
- formula
- active compounds
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/24—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D213/28—Radicals substituted by singly-bound oxygen or sulphur atoms
- C07D213/30—Oxygen atoms
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- C07C43/188—Unsaturated ethers
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- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/24—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D213/54—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
- C07D213/55—Acids; Esters
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- C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
- C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
- C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
- C07D239/26—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
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- C07D319/04—1,3-Dioxanes; Hydrogenated 1,3-dioxanes
- C07D319/06—1,3-Dioxanes; Hydrogenated 1,3-dioxanes not condensed with other rings
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- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
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- C09K19/3441—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having nitrogen as hetero atom
- C09K19/3444—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having nitrogen as hetero atom the heterocyclic ring being a six-membered aromatic ring containing one nitrogen atom, e.g. pyridine
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Definitions
- the invention relates to optically active compounds of the formula I.
- a 2 , A 3 each unsubstituted or 1,4-phenylene substituted by one or and A and two F and / or Cl atoms and / or CH 3 groups and / or CN groups, which also includes one or two CH groups can be replaced by N, 1,4-cyclohexylene, wherein one or two non-adjacent CH 2 groups can also be replaced by O atoms and / or S atoms, piperidine-1,4-diyl, 1,4-bicyclo- (2,2,2) -octylene-, naphthalene -2,6-diyl, decahydronaphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl groups,
- Z 1 and Z 2 each -CO-O-, -O-CO-, -CH 2 CH 2 -, -OCH 2 -, -CH 2 O-, -C ⁇ C- or a single bond,
- the compounds of the formula I can be used as components of chiral-tapped smectic liquid-crystalline phases.
- Chiral-chopped smectic liquid-crystalline phases with ferroelectric properties can be produced by adding a suitable chiral dopant to base mixtures with one or more chopped smectic phases (LA Beresnev et al., Mol. Cryst. Liq. Cryst. 89, 327 (1982 HR Brand et al., J. Physique 44, (lett.), L-771 (1983), such phases can be used as dielectrics for fast switching displays based on the principle of SSFLC technology described by Clark and Lagerwall (NA Clark and ST Lagerwall, Appl.
- the elongate molecules are arranged in layers, the molecules being one
- the tilt direction changes by a small angle with respect to an axis perpendicular to the layers ate a helical structure is formed.
- the smectic layers are arranged perpendicular to the plates of the cell. The helical arrangement of the tilt directions of the molecules is suppressed by a very small distance between the plates (approx. 1-2 ⁇ m). This will make the
- a major disadvantage for many applications of the currently available materials with chiral-chased smectic phases is their relatively high optical anisotropy, the switching times which are not sufficiently short due to relatively high viscosity values, and that the dielectric anisotropy values are greater than zero or, if negative, has little non-zero values. Negative values of the dielectric anisotropy are required if the required planar orientation is brought about by superimposing the control field with an AC holding field with a small amplitude (JM Geary, SID conference, Orlando / Florida, April / May 1985, lecture 8.3).
- the compounds of the formula I are therefore particularly suitable as components of chiral-chopped smectic liquid-crystalline phases.
- chemically particularly stable chiral-chopped smectic liquid-crystalline phases with favorable ferroelectric phase ranges, in particular with wide Sc * phase ranges, negative or also positive dielectric anisotropy, low optical anisotropy, favorable pitch height and high values for the spontaneous polarization and for such phases very short switching times can be produced.
- P is the spontaneous polarization in nC / cm 2 .
- the range of liquid-crystalline substances which are suitable for the production of ferroelectric mixtures from various application points of view is also very broadly broadened.
- the compounds of formula I have a wide range of applications. Depending on the choice of the substituents, these compounds can serve as base materials from which liquid-crystalline phases are predominantly composed; However, it is also possible to add compounds of the formula I to liquid-crystalline base materials from other classes of compounds, for example to improve the dielectric and / or optical anisotropy and / or the spontaneous polarization and / or the phase range and / or the tilt angle and / or the pitch and / or the Switching times of such a phase vary.
- the compounds of the formula I are also suitable as intermediates for the preparation of other substances which can be used as constituents of liquid-crystalline phases.
- the compounds of the formula I are colorless in the pure state and have low optical anisotropy values. Some of the compounds of the formula I show liquid-crystalline mesophases in a temperature range which is favorably located for electro-optical use, but isotropic or monotropic liquid-crystalline compounds of the formula I can also be used advantageously as components of chiral-chopped smectic phases. They are very stable chemically, thermally and against light.
- the invention thus relates to the optically active compounds of the formula I and the use of the compounds of the formula I as components of liquid-crystalline phases.
- the invention also relates to chiral tilted smectic liquid-crystalline phases containing at least one optically active compound of the formula I.
- the invention further relates to such phases containing at least one compound of the formula I and liquid crystal display elements, in particular electro-optical display elements, which contain such phases.
- Ph in the following means a 1,4-phenylene group, in which one or two CH groups can also be replaced by N, Cy a 1,4-cyclohexylene group, in which one or two non-adjacent CH 2 groups also have O- Atoms can be replaced and Bi a bicyclo (2,2,2) octylene group.
- R 1 , R 5 , n, A 2 , A3, A 4 , Q, X, X ', Q', Y ', Z 1 and Z 2 have the meaning given, unless expressly stated otherwise .
- the compounds of the formula I include, in particular, compounds of the subforms Ia and Ib (with two rings)
- the preferred compounds of the formula Ib include those of the sub-formulas Ibl to Ib4:
- the preferred compounds of formula Ic include those. of the sub-formulas Ic1 to Ic4:
- the preferred compounds of the formula Id include those of the sub-formulas Idl and Id3:
- R 1 and R 5 each independently represent alkyl.
- a 2 , A 3 and A 4 si.nd preferably Cy or Ph.
- Ph preferably denotes a 1,4-phenylene (Phe), a pyrimidine-2,5-diyl (pyr ), a pyridine-2,5-diyl (pyn), a pyrazine-3,6-diyl or a pyridazine-2,5-diyl group, particularly preferably Phe, Pyr or Pyn.
- the compounds according to the invention preferably no longer contain as a 1,4-phenylene group in which one or two CH groups are replaced by N.
- Cy preferably represents a 1,4-cyclohexylene group.
- -Ph-Ph- is particularly preferred.
- -Ph-Ph- is preferably -Phe-Phe-, Phe-Pyr or Phe-Pyn.
- the groups are particularly preferred
- Z 1 and Z 2 are preferably simple formations, in the second place preferably -O-CO-, -CO-O-, -C ⁇ C- or -CH 2 CH 2 -
- Z 1 is -CO-O, -O-CO-, -C ⁇ C- or -CH 2 CH 2 -, in particular the -CH 2 CH 2 - and the -C ⁇ C group.
- X in the compounds of the formulas above and below is halogen, CN or CH 3 , preferably Cl or CH 3 .
- Q alkylene with 1 to 2 carbon atoms, -O-, -O-CO- and -COO-.
- Compounds of the formulas above and below with branched groups R 1 and R 5 may be important.
- Branched groups of this type usually contain no more than two chain branches.
- R 1 or R is preferably a straight-chain group or a branched group with no more than one chain branch.
- Preferred branched radicals are isopropyl, 2-butyl
- -CO-O-, -O-CO- or a single bond are particularly preferred.
- Q ' is preferably -CH 2 -, -CH 2 CH 2 -, -CH 2 CH 2 CH 2 - or a single bond, particularly preferably a single bond.
- Y is preferably CH 3 , -CN or Cl, particularly preferably Cl or CR 3 .
- R 5 is preferably straight-chain or branched alkyl having 1 to 10, in particular 1 to 7,
- Preferred compounds of the formula I are those in which X and Y 'do not simultaneously denote methyl.
- Preferred compounds of the formula I and Ia to Ig are those in which at least one of the radicals contained therein has one of the preferred meanings indicated.
- optically active radicals R 1 or R -C * HX-Q
- -X'-Q'-C * HY '-R 5 in these preferred compounds is given below:
- R 1 -C * HX-Q may be the same or different from -X'-Q'-C * Be HY'-R 5 .
- -X '-Q'-C * HY'-R 5 and R 1 -C * HX-Q are different and have a preferred meaning given for -X'-Q'-C * HY'-R 5 .
- R 1 , R 5 , n, X, Y ', A 2 , A 3 , A 4 , Z 1 and Z 2 have the meaning given in claim 1.
- -A 4 -Z 1 -A 2 - (Z 2 -A 3 ) n - is preferably a group of the following formulas 1 to 16 or its mirror image:
- the compounds of the formula I are prepared by methods known per se, as are described in the literature (for example in the standard works such as Houben-Weyl, Methods of Organic Chemistry, Georg-Thieme-Verlag, Stuttgart), and under reaction conditions who are known and suitable for the implementations mentioned. Use can also be made of variants which are known per se and are not mentioned here in any more detail.
- the starting materials can also be formed in situ in such a way that they are not isolated from the reaction mixture, but instead are immediately reacted further to give the compounds of the formula I.
- the compounds of the formula I can be prepared by reducing a compound which otherwise corresponds to the formula I but contains one or more reducible groups and / or CC bonds instead of H atoms.
- Preferred starting materials for the reduction correspond to the formula I, but can be
- a -CH CH group and / or instead of a -CH 2 group, a -CO group and / or instead of an H atom, a free or functional (e.g. in the form of their p-toluenesulfonate) contain modified OH group.
- the reduction can take place, for example, by catalytic hydrogenation at temperatures between about 0 ° and about 200 ° and pressures between about 1 and 200 bar in an inert solvent, for example an alcohol such as methanol, ethanol or isopropanol, an ether such as tetrahydrofuran (THF) or dioxane , an ester such as ethyl acetate, a carboxylic acid such as acetic acid or a hydrocarbon such as cyclohexane.
- an inert solvent for example an alcohol such as methanol, ethanol or isopropanol, an ether such as tetrahydrofuran (THF) or dioxane , an ester such as ethyl acetate, a carboxylic acid such as acetic acid or a hydrocarbon such as cyclohexane.
- an inert solvent for example an alcohol such as methanol, ethanol or isopropanol, an ether such
- Suitable catalysts are suitably noble metals such as Pt or Pd, which can be used in the form of oxides (for example PtO 2 , PdO), on a support (for example Pd on carbon, calcium carbonate or strontium carbonate) or in finely divided form.
- Pt or Pd which can be used in the form of oxides (for example PtO 2 , PdO), on a support (for example Pd on carbon, calcium carbonate or strontium carbonate) or in finely divided form.
- Ketones can also by the methods of Clemmensen (with zinc, amalgamated zinc or tin and hydrochloric acid, expediently in aqueous alcoholic solution or in a heterogeneous phase with water / toluene at temperatures between about 80 and 120 °) or Wolff-Kishner (with hydrazine, expedient reduced in the presence of alkali such as KOH or NaOH in a high-boiling solvent such as diethylene glycol or triethylene glycol at temperatures between about 100 and 200 °) to the corresponding compounds of the formula I which contain alkyl groups and / or —CH 2 CH 2 bridges become.
- Clemmensen with zinc, amalgamated zinc or tin and hydrochloric acid, expediently in aqueous alcoholic solution or in a heterogeneous phase with water / toluene at temperatures between about 80 and 120 °
- Wolff-Kishner with hydrazine, expedient reduced in the presence of alkali such as KOH
- arylsulfonyloxy groups with LiAlH. are reductively removed, in particular p-toluenesulfonyloxymethyl groups are reduced to methyl groups, advantageously in an inert solvent such as diethyl ether or THF at temperatures between about 0 and 100 °. Double bonds can be hydrogenated (even in the presence of CN groups!)
- NaBH 4 or tributyltin hydride in methanol for example, the corresponding cyclohexane derivatives are formed from 1-cyanocyclohexene derivatives.
- Esters of the formula I can also be obtained by esterifying corresponding carboxylic acids (or their reactive derivatives) with alcohols or phenols (or their reactive derivatives).
- Suitable reactive derivatives of the carboxylic acids mentioned are in particular the acid halides, especially the chlorides and bromides, and also the anhydrides, e.g. also mixed anhydrides, azides or esters, in particular alkyl esters with 1 to 4 carbon atoms in the alkyl group.
- Suitable reactive derivatives of the alcohols or phenols mentioned are in particular the corresponding metal alcoholates or phenolates, preferably an alkali metal such as Na or K.
- the esterification is advantageously carried out in the presence of an inert solvent.
- Particularly suitable are ethers such as diethyl ether, di-n-butyl ether, THF, dioxane or anisole, ketones such as acetone, butanone or cyclohexanone, amides such as DMF or phosphoric acid hexamethyltriamide, hydrocarbons such as benzene, toluene or xylene, halogenated hydrocarbons such as carbon tetrachloride or tetrachlorethylene and sulfoxides such as Dimethyl sulfoxide or sulfolane.
- Solvents immiscible with water can at the same time advantageously be used for azeotropically distilling off the water formed during the esterification.
- an excess of an organic base for example pyridine, quinoline or triethylamine, can also be used as a solvent for the esterification.
- the esterification can also be carried out in the absence of a solvent, for example by simply heating the components in the presence of sodium acetate.
- the reaction temperature is usually between -50 ° and + 250 °, preferably between -20 ° and + 80 °. At these temperatures, the esterification reactions are usually complete after 15 minutes to 48 hours.
- reaction conditions for the esterification largely depend on the nature of the starting materials used.
- a free carboxylic acid is usually reacted with a free alcohol or phenol in the presence of a strong acid, for example a mineral acid such as hydrochloric acid or sulfuric acid.
- a preferred reaction mode is the reaction of an acid anhydride or, in particular, an acid chloride with an alcohol, preferably in a basic medium, the bases being in particular alkali metal hydroxides such as sodium or potassium hydroxide, alkali metal carbonates or hydrogen carbonates such as sodium carbonate, potassium carbonate or potassium hydrogen carbonate, alkali metal acetates such as sodium - or Potassium acetate, alkaline earth metal hydroxides such as calcium hydroxide or organic bases such as triethylamine, pyridine, lutidine, collidine or quinoline are important.
- Another preferred embodiment of the esterification is that the alcohol or the phenol is first in the
- Dioxane derivatives or dithiane derivatives of the formula I are expediently prepared by reacting an appropriate aldehyde (or one of its reactive derivatives) with a corresponding 1,3-diol or a corresponding 1,3-dithiol (or one of its reactive derivatives), preferably in the presence an inert solvent such as benzene or toluene and / or a catalyst, for example a strong acid such as sulfuric acid, benzene or p-toluenesulfonic acid, at temperatures between 20 ° and about 150 °, preferably between 80 ° and 120 °.
- Acetals are primarily suitable as reactive derivatives of the starting materials.
- aldehydes and 1,3-diols or 1,3-dithiols mentioned and their reactive derivatives are known, and all of them can be prepared from compounds known from the literature without difficulty using standard organic chemistry processes.
- the aldehydes can be obtained by oxidation of corresponding alcohols or by reduction of corresponding carboxylic acids or their derivatives, the diols by reduction of corresponding diesters and the dithiols by reaction of corresponding dihalides with NaSH.
- nitriles of the formula I corresponding acid amides, for example those in which a CONH 2 group is used instead of the radical X, can be dehydrated.
- the amides can be obtained, for example, from corresponding esters or acid halides by reaction with ammonia.
- Suitable water-releasing agents are, for example, inorganic acid chlorides such as SOCl 2 , RCl 3 , PCl 5 , POCl 3 , SO 2 Cl 2 , COCl 2 , furthermore P 2 O 5 , R 2 S 5 , AlCl 3 (for example as double compounds with NaCl), aromatic sulfonic acids and sulfonic acid halides. You can do it in the present or
- nitriles of the formula I mentioned above corresponding acid halides, preferably the chlorides, can also be reacted with sulfamide, advantageously in an inert solvent such as tetramethylene sulfone at temperatures between about 80 ° and 150 °, preferably at 120 °. After the usual work-up, the nitriles can be isolated directly.
- sulfamide advantageously in an inert solvent such as tetramethylene sulfone at temperatures between about 80 ° and 150 °, preferably at 120 °.
- Ethers of the formula I can be obtained by etherification of corresponding hydroxyl compounds, preferably corresponding phenols, the hydroxyl compound advantageously first being converted into a corresponding metal derivative, for example by. Treatment with NaH, NaNH 2 , NaOH, KOH, Na 2 CO 3 or K 2 CO 3 is converted into the corresponding alkali metal alcoholate or alkali metal phenolate.
- corresponding chlorine or bromine compounds of the formula I can also be reacted with a cyanide, advantageously with a metal cyanide such as NaCN, KCN or Cu 2 (CN) 2 , for example in the presence of pyridine in an inert solvent such as DMF or N-methylpyrrolidone at temperatures between 20 ° and 200 °.
- a cyanide advantageously with a metal cyanide such as NaCN, KCN or Cu 2 (CN) 2
- pyridine in an inert solvent such as DMF or N-methylpyrrolidone at temperatures between 20 ° and 200 °.
- optically active compounds of the formula I are obtained by using appropriate optically active starting materials and / or by separating the optical antipodes by means of chromatography using known methods.
- the phases according to the invention contain at least one, preferably at least two, compounds of the formula I.
- Particularly preferred are chiral tilted smectic liquid-crystalline phases, the achiral base mixture of which, in addition to compounds of the formula I, contains at least one other component with negative or small positive dielectric anisotropy.
- These further components of the chiral base mixture can make up 1 to 50%, preferably 10 to 25%, of the base mixture.
- Compounds of the sub-formulas Va to Vp are suitable as further components with small positive or negative dielectric anisotropy:
- R 4 and R 5 are each preferably straight-chain alkyl
- n is
- R 4 and R 5 each represent straight-chain alkyl or alkoxy each having 5 to 10 C atoms.
- the compounds of the sub-formulas Vc, Vh and Vi are suitable as additives for lowering the melting point and are normally added to the base mixtures in an amount of not more than 5%, preferably 1 to 3%.
- R 4 and R 5 in the compounds of the sub-formulas Vc, Vh and Vi are preferably straight-chain alkyl having 2 to 7, preferably 3 to 5, carbon atoms.
- Another class of compounds suitable for lowering the melting point in the phases according to the invention is that of the formula
- R 4 and R 5 di.e have the preferred meaning given for Vc, Vh and Vi.
- R 'and R''each preferably represent straight-chain
- Q 1 and Q 2 each represent 1,4-phenylene, trans-1,4-cyclohexylene, 4,4'-biphenylyl, 4- (trans-4-cyclohexyl) phenyl, trans, trans-4,4'-bicyclohexyl or one of the groups Q 1 and Q 2 also a single bond.
- Q 3 and Q 4 each represent 1,4-phenylene, 4,4'-biphenylyl or trans-1,4-cyclohexylene.
- One of the groups Q 3 and Q 4 can also mean 1,4-phenylene, in which at least one CH group has been replaced by N.
- R ''' is an optically active residue with an asymmetric carbon atom
- A is 1,4-phenylene or trans-1,4-cyclohexylene, Z ° CH or N and n is 0 or 1.
- the compounds of formula I are also suitable as components of nematic liquid crystalline phases, e.g. to avoid reverse twist.
- liquid-crystalline phases according to the invention consist of 2 to 25, preferably 3 to 15 components, including at least one compound of the formula I.
- the other constituents are preferably selected from the nematic or nematogenic substances, in particular the known substances, from the classes of the azoxybenzenes, benzylidene anilines, Biphenyls, terphenyls, phenyl or cyclohexyl benzoates, cyclohexane carboxylic acid phenyl or cyclohexyl esters, phenylcyclohexanes, cyclohexylbiphenyls, cyclohexylcyclohexanes, cyclohexylnaphthalenes, 1,4-bis-cyclohexylbenzenes, 4,4'-bis-cyclohexylbiphenyls, phenyl- or cyclohexylpyrimidines, phenyl- or cyclohex
- L and E each a carbo- or heterocyclic ring system from the one of 1,4-disubstituted benzene and cyclohexane rings, 4,4'-disubstituted biphenyl, phenylcyclohexane and cyclohexylcyclohexane systems, 2,5-disubstituted pyrimidine and 1,3-dioxane rings, 2,6-disubstituted naphthalene, di- and tetrahydronaphthalene, quinazoline and tetrahydroquinazoline,
- Y halogen preferably chlorine, or -CN
- R 'and R' ' are different from one another, one of these radicals usually being an alkyl or alkoxy group.
- R 'and R' ' are also common. Many such substances or mixtures thereof are commercially available. All of these substances are obtainable by methods known from the literature.
- the phases according to the invention contain about 0.1 to 99, preferably 10 to 95%, of one or more compounds of formula I. Also preferred are liquid-crystalline phases according to the invention, containing 0.1-40, preferably 0.5-30% of one or more compounds of formula I.
- the phases according to the invention are prepared in a conventional manner.
- the components are dissolved in one another, expediently at elevated temperature.
- Phases according to the invention are modified so that they can be used in all previously known types of liquid crystal display elements.
- conductive salts preferably ethyl-dimethyl-dodecyl-ammonium-4-hexyloxybenzoate, tetrabutylammonium-tetraphenylboranate or complex salts of crown ethers (see, for example, I. Haller et al., Mol. Cryst.Liq.Cryst. Volume 24, pages 249-258 (1973)) to improve the conductivity, pleochroic dyes for producing colored guest-host systems or substances for changing the dielectric anisotropy, the viscosity and / or the orientation of the nematic phases are added.
- Such substances are e.g. in DE-OS 22 09 127, 22 40 864, 23 21 632, 23 38 281, 24 50 088, 26 37 430, 28 53 728 and 29 02 177.
- Mp. Melting point
- Kp. Clearing point. Percentages above and below mean percentages by weight; all temperatures are given in degrees Celsius. "Conventional work-up” means: water is added, the mixture is extracted with methylene chloride, the mixture is separated off, the organic phase is dried, evaporated and the product is purified by crystallization and / or chromatography.
- K crystalline solid state
- S smectic phase (the index indicates the phase type)
- N nematic state
- Ch cholesteric phase
- I isotropic phase. The number between two symbols indicates the transition temperature in degrees Celsius.
- optically active 4- (4 '- (2-octyloxy) biphenyl-4-yl) -1-cyano-1- (2-hydroxypropyl) cyclohexane available from 4- (4' - (2-octyloxy ) -biphenyl-4-yl) -cyclohexane carbonitrile by alkylation with optically active propylene oxide and lithium diisopropylamide as base
- optically active 2-chloro-3-methylbutyric acid gives optically active 1- [4-cis- (4 '- (2-octyloxy ) -biphenyl-4-yl) -r-1-cyancyclohexyl] -2-propyl- (2-chloro-3-methylbutyrate).
- S S-3-methyl-2-chloropentanoic acid in the presence of DCC with optically active 2- (p-hydroxyphenyl) -3- (3-methylpentyl) pyridine [can be prepared from 2- (pMethoxyphenyl) -3- (3-methylpenty1) pyridine esterified by basic ether cleavage with potassium tert-butoxide in NMP at 180 ° C.] and worked up as usual.
- S, S 3-Methyl-2-chloropentanoic acid p-A- (3-methylpentyl) pyridin2-yl] phenyl ester is obtained.
- a liquid-crystalline phase is produced consisting of
- a liquid crystalline phase consisting of
- a liquid-crystalline phase is produced consisting of
- a liquid crystalline phase consisting of
- a liquid crystalline phase consisting of
- a liquid crystalline phase consisting of
- a liquid crystalline phase consisting of
- a liquid crystalline phase consisting of
- a liquid crystalline phase consisting of
- a liquid crystalline phase consisting of
- Optically active compounds can be used as components of chirally tilted smectic liquid crystal phases.
- Optically active compounds can be used as components of chiral-chopped smectic liquid-crystalline phases.
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- Engineering & Computer Science (AREA)
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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DE3604905 | 1986-02-17 | ||
DE3604905 | 1986-02-17 | ||
DE3630771 | 1986-09-10 | ||
DE3630771 | 1986-09-10 |
Publications (1)
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EP0260275A1 true EP0260275A1 (de) | 1988-03-23 |
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EP87901017A Withdrawn EP0260275A1 (de) | 1986-02-17 | 1987-01-31 | Optisch aktive verbindungen |
EP87901018A Expired - Lifetime EP0257048B1 (de) | 1986-02-17 | 1987-01-31 | Optisch aktive verbindungen |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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EP87901018A Expired - Lifetime EP0257048B1 (de) | 1986-02-17 | 1987-01-31 | Optisch aktive verbindungen |
Country Status (6)
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US (1) | US5064569A (de) |
EP (2) | EP0260275A1 (de) |
KR (2) | KR880700795A (de) |
AT (1) | ATE110368T1 (de) |
DE (1) | DE3750419D1 (de) |
WO (2) | WO1987005017A2 (de) |
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DE3333677A1 (de) * | 1983-09-17 | 1985-04-04 | Merck Patent Gmbh, 6100 Darmstadt | Fluessigkristall-phase |
JPS6090290A (ja) * | 1983-10-05 | 1985-05-21 | Chisso Corp | カイラルスメクチツク液晶組成物 |
JPS60218358A (ja) * | 1984-04-13 | 1985-11-01 | Ajinomoto Co Inc | 液晶 |
EP0163229A3 (de) * | 1984-05-23 | 1988-08-17 | Hitachi, Ltd. | Ferroelektrische Flüssigkristallzusammensetzung |
DE3577211D1 (de) * | 1984-06-07 | 1990-05-23 | Seiko Instr Inc | Fluessigkristallverbindung. |
JPS6143A (ja) * | 1984-06-11 | 1986-01-06 | Chisso Corp | 強誘電性液晶化合物及び液晶組成物 |
EP0168043B1 (de) * | 1984-07-11 | 1990-11-07 | MERCK PATENT GmbH | Flüssigkristall-Phase |
EP0174816B1 (de) * | 1984-09-10 | 1990-05-23 | Ajinomoto Co., Inc. | Biphenyldiesterverbindungen und Flüssigkristallkompositionen die diese enthalten |
GB2170214A (en) * | 1985-01-26 | 1986-07-30 | Stc Plc | Ferroelectric smectic liquid crystal mixture |
EP0191600B1 (de) * | 1985-02-08 | 1991-12-27 | Ajinomoto Co., Inc. | Auf Polyphenyl basierende Esterverbindungen und sie enthaltende flüssigkristalline Zusammensetzungen |
US5076962A (en) * | 1985-03-12 | 1991-12-31 | Chisso Corporation | Ferroelectric chiral smectic liquid crystal composition |
DE3515373A1 (de) * | 1985-04-27 | 1986-11-06 | Merck Patent Gmbh, 6100 Darmstadt | Stickstoffhaltige heterocyclen |
DE3515374C2 (de) * | 1985-04-27 | 1998-02-26 | Hoechst Ag | Chirale getilte smektische flüssigkristalline Phasen und deren Verwendung in elektrooptischen Anzeigeelementen |
DE3667052D1 (en) * | 1985-07-01 | 1989-12-28 | Ajinomoto Kk | Biphenyl carbonic acid ester compounds and liquid crystal composition containing the same |
GB8520715D0 (en) * | 1985-08-19 | 1985-09-25 | Secr Defence | Secondary alcohol derivatives |
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DD240385A1 (de) * | 1985-08-26 | 1986-10-29 | Univ Halle Wittenberg | Anwendung ferroelektrischer fluessigkristalle |
DE3650014D1 (de) * | 1985-09-18 | 1994-09-08 | Merck Patent Gmbh | Smektische flüssigkristalline phasen. |
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DE3689329T2 (de) * | 1985-12-04 | 1994-07-07 | Ajinomoto Kk | Verbindungen auf der Basis der Phenylpyrimidine und sie enthaltende flüssigkristalline Zusammensetzungen. |
JPS62181238A (ja) * | 1986-02-05 | 1987-08-08 | Dainippon Ink & Chem Inc | 液晶性化合物 |
DE3604898A1 (de) * | 1986-02-17 | 1987-08-20 | Hoechst Ag | Chirale umsetzungsprodukte aus mesogenen molekuelbausteinen und bifunktionell reaktionsfaehigen weinsaeurederivaten und ihre verwendung als dotierstoff in fluessigkristall-phasen |
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DE3718174A1 (de) * | 1987-05-29 | 1988-12-15 | Hoechst Ag | Verwendung von optisch aktiven oxiran-2-carbonsaeureestern als dotierstoffe in fluessigkristallmischungen, diese enthaltende fluessigkristallmischungen und neue optisch aktive oxiran-2-carbonsaeureester |
US4959173A (en) * | 1987-09-29 | 1990-09-25 | Adeka Argus Chemical Co., Ltd. | Optically active ester compound |
DE3827603A1 (de) * | 1988-08-13 | 1990-03-15 | Hoechst Ag | Chirale smektische fluessigkristalle und diese enthaltende glasartige materialien zur darstellung und speicherung von information |
-
1987
- 1987-01-31 EP EP87901017A patent/EP0260275A1/de not_active Withdrawn
- 1987-01-31 WO PCT/DE1987/000035 patent/WO1987005017A2/de not_active Application Discontinuation
- 1987-01-31 DE DE3750419T patent/DE3750419D1/de not_active Expired - Lifetime
- 1987-01-31 WO PCT/DE1987/000036 patent/WO1987005018A2/de active IP Right Grant
- 1987-01-31 AT AT87901018T patent/ATE110368T1/de not_active IP Right Cessation
- 1987-01-31 EP EP87901018A patent/EP0257048B1/de not_active Expired - Lifetime
- 1987-10-16 KR KR1019870700934A patent/KR880700795A/ko not_active Application Discontinuation
- 1987-10-16 KR KR1019870700993A patent/KR880700796A/ko not_active Application Discontinuation
-
1989
- 1989-12-07 US US07/445,104 patent/US5064569A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
WO1987005017A3 (fr) | 1988-01-14 |
EP0257048B1 (de) | 1994-08-24 |
US5064569A (en) | 1991-11-12 |
EP0257048A1 (de) | 1988-03-02 |
WO1987005018A2 (fr) | 1987-08-27 |
DE3750419D1 (de) | 1994-09-29 |
ATE110368T1 (de) | 1994-09-15 |
KR880700795A (ko) | 1988-04-12 |
WO1987005018A3 (fr) | 1988-03-24 |
WO1987005017A2 (fr) | 1987-08-27 |
KR880700796A (ko) | 1988-04-12 |
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Inventor name: GEELHAAR, THOMAS Inventor name: KURMEIER, HANS-ADOLF Inventor name: WAECHTLER, ANDREAS Inventor name: SCHEUBLE, BERNARD |