WO1996011897A1 - Derive difluoroxymethane et composition a cristaux liquides - Google Patents
Derive difluoroxymethane et composition a cristaux liquides Download PDFInfo
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- WO1996011897A1 WO1996011897A1 PCT/JP1995/002099 JP9502099W WO9611897A1 WO 1996011897 A1 WO1996011897 A1 WO 1996011897A1 JP 9502099 W JP9502099 W JP 9502099W WO 9611897 A1 WO9611897 A1 WO 9611897A1
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Definitions
- the present invention relates to a difluoromethane derivative as a liquid crystal compound suitable as a liquid crystal material in various liquid crystal displays, and a liquid crystal composition containing the same.
- Liquid crystal display devices use the optical anisotropy and dielectric anisotropy of liquid crystal materials.
- the display types are twisted nematic (TN type) and super twisted nematic (STN type).
- TN type twisted nematic
- STN type super twisted nematic
- DS type Dynamic scattering type
- GH type guest-host type
- DAP type etc.
- driving methods a static driving method, a time-division driving method, an active matrix driving method, a two-frequency driving method, and the like are known.
- the properties of the liquid crystal material used in such a liquid crystal display element vary depending on the application, but all liquid crystal materials are stable against external environmental factors such as moisture, air, heat, light, and the like.
- a liquid crystal material used for a liquid crystal display element has several types to obtain the optimum dielectric anisotropy ( ⁇ £) or refractive index anisotropy ( ⁇ ) required for each display element. It is composed of from ten or more liquid crystal compounds. For this reason, compatibility with other liquid crystal compounds, particularly in recent years, is desired to have good low-temperature compatibility in view of demands for use in various environments.
- an active matrix method particularly a TFT (thin film transistor) method
- TFT thin film transistor
- STN method which has a large display capacity but is simple and inexpensive in the manufacturing process, is also widely used as a display for personal computers and the like.
- V, h the threshold voltage (V, h ) is represented by the following equation (HJDeuling. Et al .. Mol. Cryst. Liq. Crst..27 (1975) 81).
- ⁇ is the elastic constant, £. Is the dielectric constant of vacuum. From the above formula, it is customary to use a material with a large dielectric anisotropy ( ⁇ £) to lower the threshold voltage. Meanwhile c have been actively, in the liquid crystal compound having a fluorine atom as a substituent, its increasing dielectric constant anisotropy, it is effective to increase the number of substituted fluorine atoms on the molecule It is known that there is. However, it has been empirically known by those skilled in the art that the substitution number of fluorine atoms on the compound molecule and the viscosity have a proportional relationship, and that the temperature range of the liquid crystal phase decreases as the number of substitution of fluorine atoms increases. I have. Therefore, it is considered to be difficult to improve only the dielectric anisotropy by suppressing the rise in viscosity and the decrease in the liquid crystal phase temperature range.
- (b-3) >>> (b-1), (b-2), (b-)> (a)
- the compound (b-3) has an ester bonding group as a bonding group between molecular skeletons, It is considered that the large polarization of the ester carbonyl group effectively contributes to the dielectric constant of the long axis of the compound molecule and shows a very large dielectric anisotropy.
- (b-3) is not a favorable compound in terms of response speed because it has a significantly higher viscosity than (a), (b-1), (b-2) and (b-4).
- Compound (c) also has a relatively large dielectric anisotropy, but has a high viscosity like (b-3), and thus cannot be said to satisfy the requirements.
- compound (d) is a molecular against the polarization of the fluorine atoms at the molecular ends Since the depolarization of the 1 0 CF 2- group, which is the bonding group of, is in the opposite direction, the dielectric constant in the molecular long axis direction is canceled out, and the large dielectric anisotropy I expected that I could not expect sex.
- compound (e) relatively large dielectric anisotropy can be expected due to the contribution of the polarization of the CF 20- group, but a high clearing point cannot be expected because the skeleton structure is a bicyclic compound. So I thought.
- compound (d) the effect of one CF 2 ⁇ first binding groups including (e), in particular knowledge about the relationship between the dielectric constant different properties and viscosity, current Fushimi that it is completely unknown I got out.
- An object of the present invention is to provide a novel liquid crystal compound having a large dielectric anisotropy and a remarkably low sharpness as a low voltage liquid crystal compound in various modes including an active matrix system and an STN system, and a novel liquid crystal compound.
- An object of the present invention is to provide a liquid crystal composition containing the same.
- the present inventors have studied the physical properties of a novel difluoromethoxymethane derivative that can be derived from the X-dipentyl benzoate derivative. We found that it effectively contributes to the increase in the dielectric constant in the direction of the molecular long axis, has a large dielectric anisotropy, and has a very low viscosity despite having fluorine atoms in the molecule. Further, those in which a fluorine-based substituent is selected as a terminal substituent of these compounds are used in the active matrix method, and those in which other substituents such as cyano group are selected are used in various compounds such as STN. The present invention was found to be a novel low-voltage liquid crystal compound useful in the above mode, and completed the present invention.
- ring A ,, A 2 each independently preparative Nsu 1, 4-xylene group to Shikuro, one or more hydrogen atoms of the 6-membered ring halogen atoms Or 4-substituted phenylene group, trans-substituted 3-diene Xan—2,5-diyl or pyrimidine 2,5-diyl;
- ring A 3 is a 1,4-phenylene group in which one or more hydrogen atoms of a 6-membered ring may be substituted by a halogen atom;
- Jifuruorooki Shimetan derivative according to X is OCF 3 in the general formula (I) (5).
- ring A is a 1,4-phenylene group in which one or more hydrogen atoms of a 6-membered ring may be substituted with a halogen atom
- Z , Is —OCF 2 —, Z 2 , and Z 3 are both covalent bonds
- X is a linear or branched alkyl, alkenyl, or alkoxy group having 1 to 10 carbon atoms. Fluoroxime derivative.
- a liquid crystal composition comprising at least one difluorooxymethane derivative according to any one of (1) to (12).
- R represents an alkyl group having 1 to 10 carbon atoms
- X represents F, C and C Fs, OC 3 , OCF 2 H or an alkyl group having 1 to 10 carbon atoms
- Q, 2 , Q each independently represent H or F
- 0 represents 1 or 2
- p represents 0 or 1.
- Y, and Y 2 each independently represent one CH 2 CH 2 —, one CH 2 CH— or a covalent bond
- ring D represents a trans-4-cyclohexylene group or a 1,4-phenylene group.
- a liquid crystal composition comprising one kind.
- At least one difluoroquine methane derivative according to any of (1) to (12) is contained, and as a second component, a compound represented by the general formula (V), (VI), (VII), (VIII) and (IX)
- R 2 represents a fluorine atom, an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms.
- one or two or more non-adjacent CH 2 groups are oxygen Y 3 —CH 2 CH, a COO— or a covalent bond
- Q 6 and Q 6 each independently represent a hydrogen or a fluorine atom
- E represents a trans-1, 4 -Cyclohexylene, 1,4-phenylene, trans-1,3-dioxane-1,2,5-diyl
- ring G represents trans-1,1,4-cyclohexylene; 4-phenylene; q And r independently represent 0 or 1.
- R 3 represents an alkyl group having 1 to 10 carbon atoms
- Q 7 represents a hydrogen or fluorine atom
- k represents 0 or 1.
- R '"F y ' ten ' ⁇ (In the formula, R 4 represents an alkyl group having 1 to 10 carbon atoms, I represents trans-4-cyclohexylene or 4-phenylene, and Q 8 and Q s represent a hydrogen or fluorine atom. And Y 4 represents —COO— or C ⁇ C ⁇ 1, and f and h stand for 0 or 1, respectively.)
- R 5 and R 6 each independently represent an alkyl group, an alkoxy group or an alkoxymethyl group having 1 to 10 carbon atoms, and J represents trans-4-cyclohexylene, 1,3-pyrimidine one 2, 5-Jiiru or teeth 4 shows an phenylene, K is shown a Kinren or 1, 4 one phenylene les emissions trans one cog 4 Shikuro, Y 6 one C three C one, one COO-, One CH 2 CH 2 — or indicates a covalent bond.
- R 7 represents an alkyl group or an alkoxy group having 1 to 10 carbon atoms.
- R 8 represents an alkyl group having 1 to 10 carbon atoms, and one or two or more non-adjacent CH 2 groups thereof) May be substituted by an oxygen atom, and M represents trans-1,4-hexyl, or hexylene or 3-pyrimidine-1,5-diyl; ring N and!:; T each independently xylene or teeth 4 full trans one said 4-cyclopropyl Te - indicates L down, Y 7 is - CH 2 CH 2 -, -COO- or indicates a covalent bond, Y 8 the three C one one COO- or G represents 0 or 1, and represents water or a fluorine atom.)
- a liquid crystal composition containing at least one compound selected from the group consisting of compounds represented by the following formulas: object.
- a liquid crystal composition comprising at least one compound selected from the group consisting of:
- difluoromethane O Roo carboxymethyl methane derivative represented by the general formula (I) is a compound represented by the general formula group of the following (I a) ⁇ (I e ) c
- Sub-picture M M L68II / 960AV
- R and R ′ represent a linear or branched alkyl group having 1 to 10 carbon atoms, an anoL kenyl group or an alkoxy group.
- These compounds (1) to (66 1) show a large dielectric anisotropy and have low demarcation.
- compounds with F, CF 3 or CN groups as substituents on the molecule end of a very large dielectric anisotropy compounds having a 0CF 3 or 0CHF 2 group is at a significantly low ⁇ .
- compounds having a fluorine atom in the lateral direction with respect to the long axis of the compound molecule show a larger dielectric anisotropy and have excellent compatibility.
- Compounds (57 1) to (61 3) have two CF20- groups in the molecule, and are (67) to (103) and (143) to (32 It has even lower viscosity when compared to the compound of 0).
- the compounds (610) to (613) are compounds having remarkably excellent characteristics as a viscosity reducing agent.
- the difluorooxymethane derivative represented by the general formula (I), which is a compound of the present invention can be suitably produced by the following production steps.
- a benzonitrile derivative represented by the general formula (A) as a raw material for production, in an alcohol solvent such as ethyl alcohol, ethylene glycol or ethylene glycol, sodium hydroxide, potassium hydroxide Hydrolysis using a base such as, or a mineral acid such as hydrochloric acid or sulfuric acid as a catalyst leads to a carboxylic acid derivative (B).
- the carboxylic acid derivative (B) is used according to a general esterification method, for example, using an ion exchange resin such as a mineral acid such as hydrochloric acid or sulfuric acid, or an organic acid amberlite such as p-toluenesulfonic acid as an acid catalyst.
- N, N * dicyclohexylcarbodiimide (DCC) with a phenol derivative represented by the general formula (C) as a catalyst to produce an ester derivative represented by the general formula (D) .
- (D) can also be produced by reacting (B) with thionyl chloride to form an acid chloride, and then reacting with (C) in the presence of a base such as pyridine.
- the ester derivative (D) is converted to Lawesson's reagent [2,4-bis (4-methoxyphenyl)]-1,3-dithia-2,4-diphosphethane-1,4 using benzene or toluene as a solvent.
- thioester (thione type) derivative (E) is prepared by converting dimethyl ether sulphate (DAST) (Synthesis, 787 (1973)) from room temperature to the boiling point of the solvent using dichloromethane and chloroform as solvent. Gem-fluorination of the thiocarbonyl group to produce the desired difluorooxymethane derivative.
- DAST dimethyl ether sulphate
- a Grignard reagent is prepared from a bromobenzene derivative (F), and a dithiocarboxylic acid derivative (G) is produced by reacting with carbon disulfide to obtain a thionyl chloride.
- the thioester (thione-type) derivative (E) is produced by reacting with a phenol derivative (C) after inducing the thiocarboxylic acid chloride in the above process, and the difluorochloroquine is also produced by reacting DAST in the same manner as described above.
- a methane derivative can be manufactured.
- the compound (7) is obtained by subjecting an alkylbenzoic acid derivative 1 to a general esterification method, for example, hydrochloric acid
- a general esterification method for example, hydrochloric acid
- mineral acids such as sulfuric acid, sulfuric acid, etc.
- organic acids such as p-toluenesulfonic acid
- ion exchange resins such as amberlite, as acid catalysts, or use N, N'-dicyclohexyl carposimide (DCC).
- DCC N, N'-dicyclohexyl carposimide
- 3,4,5-Trifluorophenol which is a raw material for synthesis, can be produced using 3,4,5-trifluorotrifluorobenzene as a starting material. That is, as shown in the following formula, the method of S.0. Lawesson et al. (J. Am. Chem. So, 81, 230 (1959)) (: Grignard reagent is reacted with t-butylhydroperoxide or Grignard prepared from 3,4,5-trifluorotrifluorobenzene according to the method of R. LKidwewll et al. (0 rg. Synth .. V, 918 (1973)).
- the product can be produced by treating a reagent with a trialkyl borate to form a borate ester derivative, and then oxidizing with a hydrogen peroxide solution.
- compound (37) is 2-fluoro-41- (trans-14-alkylcyclohexyl) benzonitrinole 4 Is hydrolyzed in ethylene glycol or diethylene glycol in the presence of sodium hydroxide to obtain benzoic acid derivative 5, and then, according to a general esterification method, for example, mineral acids such as hydrochloric acid and sulfuric acid, and p-toluenesulfonic acid.
- an ion-exchange resin such as organic acid amberlite such as Amberlite as an acid catalyst, or use N, N'-dicyclohexylcarboimide (DCC) as a catalyst for 3,4,5-trifluoro It is esterified with phenol to produce 4-trifluorobenzoate derivative 6.
- 6 reacts with a Rotten reagent under reflux of toluene to form a thioester (thione type) derivative 7, and then DAST in dichloromethane can be used to produce (37).
- a phenol having various substituents is used, and from various known benzoic acid derivatives, the compounds (28) to (36 ), (3 8) to (1 8 1) can be manufactured,
- the compound (242) can be produced by the following method. That is, 4-benzene is coupled with a Grignard reagent prepared from 3,4,5-trifluorotrifluorobenzene in the presence of a noble metal catalyst such as palladium chloride to obtain a biphenyl derivative 8, and then metal powder such as iron powder is added to 8. The bromide is allowed to act in the presence of the body to produce the promobiphenyl derivative 9. Then, according to the report of LKidwell et al. (Org.
- the compound (348) is a compound represented by the formula 4- (trans-14- (trans-alkylalkylcyclohexyl) cyclo).
- Xyl] benzonitrile 11 hydrolyzed according to a conventional method.
- the above-mentioned reaction operation was performed using known carboxylic acid derivatives and phenol derivatives. And other known reaction operations in combination and selection.
- the compound (524) is 2-fluoro-4- (trans-4-alkylcyclohexyl) benzonitrile
- 2-Fluoro-4- (trans-14-alkylcyclohexyl) benzoic acid obtained by hydrolyzing 13 in a conventional manner was prepared in the same manner as in (Ic) using 13 as a raw material.
- Compound (524) can be produced from the phenylphenol derivative in the same manner as described above.
- the compound (650) is obtained by digesting (4-hydroxycyclohexyl) (4-cyanophenyloxy) methane 15 according to a conventional method. It can be produced in the same manner as in (lb) using carboxylic acid derivative 16 as a raw material.
- carboxylic acid derivative 16 as a raw material.
- phenol derivatives having various substituents are used in place of 3,4,5-trifluorophenol, and various fluorine-substituted (4-alkylcyclohexyl) (4-cyanophenyloxy)
- Compounds (6 14) to (649), (65 1) and (652) can be produced using a methane derivative. (Equation 9)
- the compound (653) can be prepared by the same method as in the production of (1a) from 41-benzoic acid 17 and 41-cyanophenol. Then, an oxidized body 19 is produced, and furthermore, it is produced by allowing 4-alkylpenylacetylene to act on 19 in the presence of a noble metal catalyst such as Pt or Pd.
- compounds (654) to (666) can be produced by using phenol derivatives having various substituents in place of 4-cyanophenol and using various known benzoic acid derivatives.
- the liquid crystal composition of the present invention may be composed of only two or more compounds selected from Group A. Further, one or more compounds of Group A may be contained as the first component, and one or more other compounds may be contained as the second component. When the second component is contained, the compound of Group A is preferably contained in a proportion of 0.1 to 99% by weight.
- Group B compounds represented by the general formulas (1 [), ([11]) and (IV) (these are referred to as Group B) can be used.
- Preferred compounds in Group B include the following (II-1 to IX-14).
- the compounds in Group B are compounds with a positive dielectric anisotropy value, have extremely excellent thermal stability, and are especially typified by TFTs that require characteristics such as a high voltage holding ratio or a large non-resistance value. It is a useful compound when preparing a liquid crystal composition for an active matrix system.
- the amount of the compound in Group B can be arbitrarily used in the range of 1 to 99% by weight based on the total weight of the liquid crystal composition, but is preferably 10 to 90% by weight.
- 97% by weight more preferably 40-95% by weight, is suitable.
- compounds represented by the general formulas (V) to (IX) (these compounds are hereinafter referred to as group C) can also be used.
- group C compounds represented by 1 A (V) to (Vi 1) in the group C, the following compounds can be preferably mentioned.
- the compounds represented by the above general formulas (V) to (VU) have a positive and large dielectric anisotropy value, and are used particularly for the purpose of reducing the threshold voltage. It is also used for expanding the nematic range, such as viscosity adjustment, ⁇ n adjustment, and increasing the clearing point. It is also used for the purpose of improving steepness.
- the compounds represented by the general formulas (VH [) and (IX) are positive compounds having a negative or weak dielectric anisotropy value.
- the compound represented by the general formula (VIH) can be used mainly for the purpose of reducing viscosity and adjusting ⁇ .
- the compound represented by (IX) can be used for the purpose of expanding the nematic range such as increasing the clearing point and for the purpose of adjusting ⁇ .
- the compounds of Group J are useful when preparing a liquid crystal composition for a super twist nematic (STN) display system, and are in the range of 1 to 99% by weight, preferably 10 to 97% by weight. More preferably, it can be used in the range of 40 to 95% by weight.
- At least one compound selected from the group C may be further contained in addition to the compound of the group A and the compound of the group B.
- it may contain at least one compound selected from the group B in addition to the compound of the group A and the compound of the group C. Good.
- the liquid crystal composition of the present invention is prepared by a conventional method. Generally, a method is used in which various components are dissolved at a high temperature.
- the liquid crystal composition of the present invention is improved and optimized according to the intended use by adding an appropriate additive.
- Such additives are well known to those skilled in the art and are described in detail in the literature and the like.
- a necessary twist angle is adjusted by inducing a helical structure of the liquid crystal, and a chiral dopant or the like for preventing reverse twist is added.
- liquid crystal composition of the present invention may be added with a dichroic dye such as a merocyanine, styryl, ab, azomethine, azoquine, quinophthalone, anthraquinone, or tetrazine type to add a guest host (GH) mode.
- a dichroic dye such as a merocyanine, styryl, ab, azomethine, azoquine, quinophthalone, anthraquinone, or tetrazine type to add a guest host (GH) mode.
- a liquid crystal composition for use Or for NCAP made by microencapsulating nematic liquid crystal, or for polymer liquid crystal display device (PDLCD) represented by polymer network liquid crystal display device (PNLCD) where three-dimensional knitted polymer is manufactured in liquid crystal. It can also be used as a liquid crystal composition. It can also be used as a liquid crystal composition for birefringence control (ECB) mode or dynamic scattering (
- composition example 1 J Composition example 1 J
- the difluorooxymethane derivative of the present invention has a very large dielectric anisotropy ( ⁇ £) and a high viscosity in comparison with the compound having a similar structure described in the section of “Prior Art”. Is a compound that has remarkably low sharpness compared to a compound having the same molecular terminal substituent, and has excellent properties as a liquid crystal compound for low voltage in various modes including the active matrix method and STN method. .
- the difluoroquinemethane derivative of the present invention includes many other liquid crystal compounds, that is, fluorine compounds, ester compounds, Schiff base compounds, biphenyl compounds, monocyclohexane compounds, and bicyclohexane compounds. It has good compatibility with existing liquid crystalline compounds, including compounds and heterocyclic systems, and has particularly excellent properties at low temperatures. Further, by adding the compound of the present invention as a component of the liquid crystal composition, the drive voltage (threshold voltage) can be significantly reduced while suppressing the increase in viscosity.
- reaction product was purified by column chromatography using a silica gel as a filler and toluene as a developing solvent to obtain 22.8 g of colorless crystals. This is 3,4,5-trifluoro (4-propylphenyl) benzoate.
- the aqueous layer was further extracted with 150 ml of toluene, and the organic layers were mixed, and water (200 ml ⁇ 2), a saturated aqueous solution of sodium hydrogen carbonate (100 ml), 100 ml of a 10% aqueous solution of sodium hydrogen sulfite and water ( After washing successively with 200 ml, drying over anhydrous magnesium sulfate and concentration under reduced pressure gave 23.9 g of a brownish brown crystalline mixture.
- the reaction product was a column using silica gel as a filler and heptane as a developing solvent. After purification by chromatography The crystals were recrystallized from heptane to obtain 5.4 g of yellow needle crystals, which were mono- (0,3,4,5) -trifluorophenyl 4-propylphenylcarboate.
- the thione carboxylic acid ester derivative obtained by the above operation was subjected to gem-fluorination c, that is, in a 100 ml eggplant flask equipped with a nitrogen inlet tube, at room temperature, 4-propylphenylcarbothioic acid mono- 0-3,4,5—. 5.4 g of trifluorophenyl (17.4 mmol is dissolved in 50 ral of dichloromethane), 8.4 g (52.2 mmol) of acetylaminosulfur trifluoride (hereinafter abbreviated as DAST) is added, and the mixture is added at room temperature.
- DAST acetylaminosulfur trifluoride
- the residue was recrystallized from heptane to give 1.2 g of a colorless needle crystal, which was obtained using difluoro- (4-propylphenyl)-(3,4,5-trifluorophenyloxy) methane. is there.
- the following compounds can be produced by using 4-alkylbenzoic acids having different alkyl chains instead of 4-monopropylbenzoic acid.
- the following compounds can be produced by using various known phenol derivatives instead of 3,4,5-trifluorophenol.
- the mixture was extracted with water (50 ml ⁇ 2), 30 ml of a saturated aqueous solution of sodium hydrogencarbonate and water (50 ml ⁇ 2). After successive washing, the extract was dried over anhydrous magnesium sulfate and concentrated under reduced pressure to obtain 4.3 g of colorless crystals.
- the reaction product was purified by column chromatography using silica gel as the filler and heptane as the eluent, and then recrystallized from heptane to remove colorless needles (transition point: Cr 70.5-71.4 Is o) into 1.5. g obtained. This is difluoro- [4- (trans-4-1-propylcyclohexyl) phenyl]-(3,4,5-trifluorophenyloxy) methane.
- the reaction solution was further heated and refluxed for 1 hour on a warm bath and aged. Next, the reaction solution is cooled to 10 ° C or less under ice-cooling, 7.5 g (987 mmol) of carbon disulfide is added dropwise while maintaining the temperature at 10 or less, and the temperature is raised to room temperature, followed by stirring at room temperature for 3 hours. did.
- the reaction solution was cooled again to 10 ° C. or lower under ice cooling, and 50 ml of a 2N hydrochloric acid solution was added dropwise to terminate the reaction. After separating the getyl ether layer from the reaction solution, the aqueous layer was further extracted with 200 ml of getyl ether. The organic layers were mixed, washed twice with 200 ml of water, dried over anhydrous magnesium sulfate and concentrated to obtain 19.7 g of a dithiocarbonic acid derivative as a dark reddish purple solid.
- the reaction product was purified by column chromatography using silica gel as a filler and a mixed solvent of heptanol and toluene as a developing solvent, and further recrystallized from heptane to obtain 6.7 g of yellow needle crystals.
- This is 2-fluoro- 4- (trans-1-4-propylcyclohexyl) phenylcarbothio Acid 0-4-1 Trifluoromethoxyphenyl.
- 2-fluoro-41- (trans-4-alkylcyclohexyl) iodobenzene having a different alkyl chain is used in place of 2-fluoro-41- (trans-14-propylcyclohexyl) hydrobenzene.
- the following compounds can be prepared by using:
- the following compounds can be produced by using various known phenol derivatives instead of 4-trifluoromethoxyphenol according to the above production method.
- the organic layers are mixed, washed sequentially with water (200 ml ⁇ 2), saturated aqueous sodium hydrogen carbonate solution (100 ml), 10% aqueous sodium hydrogen sulfite solution (100 ml) and water (200 ml ⁇ 2), dried over anhydrous magnesium sulfate, and reduced in pressure.
- the mixture was concentrated under reduced pressure to obtain 13.3 g of a brownish brown crystalline mixture.
- the reaction product was purified by column chromatography using silica gel as a filler and heptane as a developing solvent, and recrystallized from heptane to obtain 4.5 g of yellow needle crystals. This is the 4 1 [2-(trans-4 -Probicyclo) Xyl) ethyl] phenylcarboic acid—0—3,4,5—trifluorophenyl.
- Difluoro- ⁇ 2,6-difluoro-4-1 [2- (trans-41-propino L cyclohexyl) ethyl] phenyl] — (3,4,5-trifluorophenyl) methane
- the production process consists of four steps: hydrolysis of the benzonitrile derivative, intermediate production of the ester form, thioesterification, and gem-fluorination. Hereinafter, each step will be described in detail.
- the mixture was extracted with 200 ml of dichloromethane, and the extracted layers were mixed, washed successively with water (100 ml x 2), 100 ml of saturated aqueous sodium hydrogen carbonate solution and water (100 ml x 2), dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to give 25.1 g of the reaction product.
- the reaction product was silica gel as the filler.
- the residue was purified by column chromatography using toluene as a developing solvent, and further recrystallized from a mixed solvent of heptane and ethanol to obtain 16.6 g of colorless crystals. [Trans-41- (3-butenyl) cyclohexyl] phenyl ⁇ benzoate.
- the mixture was extracted with water (50 ml x 2), a saturated aqueous sodium hydrogen carbonate solution (30 ml) and water (50 ml x 2). After successive washing, the extract was dried over anhydrous magnesium sulfate and concentrated under reduced pressure to obtain 3.8 g of colorless crystals.
- the reaction product was purified by column chromatography using silica gel as a filler and heptane as a developing solvent, and then recrystallized from ethanol to obtain l.lg of colorless needle crystals. This is difluoro- ⁇ 4- [trans-41- (3-butenyl) cyclohexyl] phenyl ⁇ -(3,4,5-trifluorophenyloxy) methane.
- 4- (3,4,5-trifluorophenyl) phenol a raw material for the production of this compound, was produced by the following procedure. That is, to a 1000 ml three-necked flask equipped with a stirrer, a thermometer, a nitrogen inlet tube, a dropping port, and a cooling tube, 7.9 g (324.2 cc) of shaved magnesium was added, and 6,5.2 g of 3,4,5-trifluorov mouth mobenzene was added. A solution prepared by dissolving (308.8 recitation ol) in 80 ml of tetrahydrofuran (hereinafter abbreviated as THF) was added dropwise over 50 minutes while maintaining the internal temperature at 50 ° C.
- THF tetrahydrofuran
- the reaction solution was extracted with toluene (300 ml ⁇ 2) after filtering and separating insolubles.
- the extract layer was washed with water (300 ml ⁇ 3), dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to obtain 38.4 g of a black-brown solid.
- the concentrated residue was purified by a chromatography treatment using silica gel as a filler and heptane as a developing solvent, and then recrystallized from a mixed solvent of heptane and ethanol to obtain 19.0 g of colorless crystals. This is 3,4,5-tritrifluorobiphenyl. Next, the obtained biphenyl derivative was subjected to bromination.
- the promobiphenyl derivative obtained by the above operation was derived into a phenylphenol derivative by the following operation. That is, 1.5 g (60.9 mol) of shaved magnesium was added to a 300 ml three-necked flask equipped with a stirrer, thermometer, nitrogen inlet tube, and dropping funnel, and then 4-promo 3 ', 4', 5'-trifluorobiphenyl A solution of 16.6 g (58.0 mmol) dissolved in 30 ml of THF was added dropwise over 25 minutes so that the internal temperature was maintained at 50 ° C.
- the mixture was stirred and aged for 1 hour on a warm bath to maintain the same temperature to prepare a Grignard reagent.
- the reaction solution was cooled to -20 under dry ice-acetone refrigerant, 7.2 g of trimethyl borate was added dropwise, and the mixture was stirred at the same temperature for 30 minutes.
- the extract was washed with saturated saline (200 ml ⁇ 2), dried over anhydrous magnesium sulfate, concentrated under reduced pressure to obtain 14.5 g of a brown solid, and the concentrated residue was recrystallized from a mixed solvent of heptane and toluene to obtain 10.9 g of colorless crystals.
- reaction product was purified by column chromatography using silica gel as a filler and using toluene as a developing solvent, and further recrystallized from a mixed solvent of heptanol and ethanol to obtain 10.5 g of a colorless crystal.
- This is 4 '(3', 4 ', 5 * 1 trifluoro) bihueniro (4' propyl) benzoate.
- the organic layers are mixed, washed sequentially with water (200 ml ⁇ 2), saturated aqueous sodium hydrogen carbonate solution (100 ml), 10 ml aqueous sodium hydrogen sulfite solution 100 ml, and water (200 ml X2), dried over anhydrous magnesium sulfate, concentrated under reduced pressure, and then brown. 10.9 g of a crystalline mixture was obtained.
- the concentrate was purified by column chromatography using silica gel as a filler and heptane as a developing solvent, and then recrystallized from heptane to obtain 6.3 g of yellow needle crystals. This is 4-propylphenylcarboic acid-0-4-(3 ', 4', 5 '1-trifluoride) biphenyl.
- the aqueous layer was further extracted with 50 ml of dichloromethane, and the extracted layers were mixed and washed sequentially with water (50 ml x 2), 30 ml of a saturated aqueous solution of sodium hydrogencarbonate and water (50 ml x 2). Thereafter, the extract was dried over anhydrous magnesium sulfate and concentrated under reduced pressure to obtain 5.9 g of colorless crystals.
- the reaction product was purified by column chromatography using silica gel as a filler and heptane as a developing solvent, and then recrystallized from heptane to obtain colorless needle-like crystals. This is difluoro- (4-propyl) It is phenyl (4 "(4", 4 ', 5'1).
- the following compounds can be produced by using 4-alkylbenzoic acids having different alkyl chains instead of 4-propylbenzoic acid according to the above production method.
- the following compounds can be produced by using various phenylphenol derivatives in place of 4- (3,4,5-trifluorophenyl) phenol according to the above production method.
- 4- [2- (4-Trifluoromethoxyphenyl) ethyl] phenol a raw material for the production of this compound, was produced by the following procedure. That is, 2.7 g (108.9 iol) of shaved magnesium was added to a 300 ml three-necked flask equipped with a stirrer, a thermometer, a nitrogen inlet tube, a dropping port, and a cooling tube, and the 3,4,5-trifluorov port was added. A solution of 21.8 g (103.7 mmol) of mobenzene dissolved in 30 ml of THF was added dropwise over 25 minutes so that the internal temperature was maintained at 50 ° C.
- reaction solution was extracted with toluene (200 ml x 2), washed sequentially with water (200 ml x 2), a saturated aqueous solution of sodium bicarbonate (100 ml) and water (200 ml x 2), dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to obtain 23.4 g of the reaction product. I got The concentrate was purified by distillation under reduced pressure to obtain 18.3 g of a colorless oil.
- reaction product was dissolved in 0 ml of toluene in a 1 L autoclave, 1.0 g of 5-Pd / C was added, and hydrogen reduction was performed at a hydrogen pressure of 100 kg / cm 2 and a temperature of 90 to 100 ° C. for 13 hours.
- the reaction solution was filtered to separate the catalyst and then concentrated under reduced pressure to obtain 17.2 g of a reaction product.
- the concentrate was purified by silica gel chromatography to obtain 0.3 g of colorless crystals. This is 4- [2- (3,4,5-trifluorophenyl) ethyl] benzene.
- reaction product was purified by column chromatography using silica gel as a filler and toluene as a developing solvent, and further recrystallized from a mixed solvent of hebutane and ethanol to obtain 11.4 g of colorless crystals.
- This is 4- (3- (3,4,5-trifluorophenyl) ethyl) phenyl (4-propyl) benzoate.
- the concentrate was purified by column chromatography using silica gel as a filler and heptane as a developing solvent, and then recrystallized from heptane to obtain 5.5 g of yellow needle crystals.
- This is 4- (4-phenylphenylcarboic acid) —0—4— [2- (3,4,5-trifluorophenyl) ethyl] phenyl.
- the aqueous layer is further extracted with 50 ml of dichloromethane, and the extracted layers are mixed and washed successively with water (50 m 1 ⁇ 2), 30 ml of a saturated aqueous sodium hydrogen carbonate solution and water (50 ml ⁇ 2). Thereafter, it was dried over anhydrous magnesium sulfate and concentrated under reduced pressure to obtain 5.5 g of colorless crystals.
- the reaction product was purified by column chromatography using silica gel as a filler and heptane as a developing solvent, and then recrystallized from heptane to obtain 1. lg of colorless needle-like crystals. This is difluoro mouth— (4-propylphenyl) -1- ⁇ 4- [2- (3,4,5-trifluorophenyl) ethyl] phenyloxy ⁇ methane.
- the following compounds can be produced by using 4-alkylbenzoic acids having different alkyl chains instead of 4-propylbenzoic acid.
- the following compounds can be produced by using various phenol derivatives which can be produced by the operation 1) in place of 4- (2,3- (3,4,5-trifluorotrifluoromethyl) phenol) according to the above production method. .
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Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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KR1019997012457A KR100264713B1 (ko) | 1994-10-13 | 1995-10-13 | 디플루오로옥시메탄 유도체를 포함하는 액정 조성물 |
AT95934292T ATE220656T1 (de) | 1994-10-13 | 1995-10-13 | Difluoroxymethan-derivate und flüssigkristall zusammensetzungen |
US08/776,298 US5858270A (en) | 1994-10-13 | 1995-10-13 | Difluorooxymethane derivative and liquid crystal composition |
EP95934292A EP0786445B1 (en) | 1994-10-13 | 1995-10-13 | Difluoroxymethane derivative and liquid crystal composition |
KR1019970702385A KR100264501B1 (ko) | 1994-10-13 | 1995-10-13 | 디플루오로옥시메탄 유도체 및 액정조성물 |
CA002202349A CA2202349C (en) | 1994-10-13 | 1995-10-13 | Difluorooxymethane derivative and liquid crystal composition |
DE69527434T DE69527434T2 (de) | 1994-10-13 | 1995-10-13 | Difluoroxymethan-derivate und flüssigkristall zusammensetzungen |
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JP27451194 | 1994-10-13 | ||
JP6/274511 | 1994-10-13 | ||
JP20553195 | 1995-08-11 | ||
JP7/205531 | 1995-08-11 |
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WO1996011897A1 true WO1996011897A1 (fr) | 1996-04-25 |
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PCT/JP1995/002100 WO1996011994A1 (fr) | 1994-10-13 | 1995-10-13 | Composition a cristaux liquides et afficheur a cristaux liquides |
PCT/JP1995/002099 WO1996011897A1 (fr) | 1994-10-13 | 1995-10-13 | Derive difluoroxymethane et composition a cristaux liquides |
PCT/JP1995/002101 WO1996011995A1 (fr) | 1994-10-13 | 1995-10-13 | Composition cristal liquide et afficheur a cristaux liquides |
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PCT/JP1995/002101 WO1996011995A1 (fr) | 1994-10-13 | 1995-10-13 | Composition cristal liquide et afficheur a cristaux liquides |
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US (3) | US5792386A (ja) |
EP (3) | EP0786445B1 (ja) |
JP (1) | JP2873096B2 (ja) |
KR (2) | KR100264501B1 (ja) |
CN (1) | CN1173912C (ja) |
AT (1) | ATE220656T1 (ja) |
CA (1) | CA2202349C (ja) |
DE (3) | DE69527434T2 (ja) |
TW (1) | TW343232B (ja) |
WO (3) | WO1996011994A1 (ja) |
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Also Published As
Publication number | Publication date |
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CN1158602A (zh) | 1997-09-03 |
CA2202349A1 (en) | 1996-04-25 |
DE69519936D1 (de) | 2001-02-22 |
EP0786445A4 (en) | 1998-02-11 |
DE69527434T2 (de) | 2003-03-20 |
DE69522699D1 (de) | 2001-10-18 |
EP0786445B1 (en) | 2002-07-17 |
CN1173912C (zh) | 2004-11-03 |
KR100264713B1 (ko) | 2000-08-16 |
JP2873096B2 (ja) | 1999-03-24 |
KR100264501B1 (ko) | 2000-09-01 |
EP0786509A4 (en) | 1998-04-01 |
EP0786508A4 (en) | 1998-04-01 |
US5858270A (en) | 1999-01-12 |
EP0786508B1 (en) | 2001-01-17 |
US5792386A (en) | 1998-08-11 |
EP0786445A1 (en) | 1997-07-30 |
TW343232B (en) | 1998-10-21 |
WO1996011994A1 (fr) | 1996-04-25 |
DE69527434D1 (de) | 2002-08-22 |
EP0786509B1 (en) | 2001-09-12 |
DE69519936T2 (de) | 2001-06-13 |
ATE220656T1 (de) | 2002-08-15 |
US5728319A (en) | 1998-03-17 |
KR970706223A (ko) | 1997-11-03 |
DE69522699T2 (de) | 2002-07-04 |
WO1996011995A1 (fr) | 1996-04-25 |
EP0786509A1 (en) | 1997-07-30 |
CA2202349C (en) | 2003-01-07 |
EP0786508A1 (en) | 1997-07-30 |
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