WO2006040009A2 - Chroman-derivate sowie ihre verwendung in flüssigkristallinen medien - Google Patents
Chroman-derivate sowie ihre verwendung in flüssigkristallinen medien Download PDFInfo
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- 0 *C(CC1)Oc2c1cc(-c1ccc(*)cc1)c(I)c2I Chemical compound *C(CC1)Oc2c1cc(-c1ccc(*)cc1)c(I)c2I 0.000 description 20
- RPMUDXVQHUECRE-UHFFFAOYSA-N CC1COC(C)OC1 Chemical compound CC1COC(C)OC1 RPMUDXVQHUECRE-UHFFFAOYSA-N 0.000 description 2
- GDAWHRVZNWKKCU-UHFFFAOYSA-N CC(Cc1c2)COc1c(C)c(-c(cc1C)cc(I)c1N)c2I Chemical compound CC(Cc1c2)COc1c(C)c(-c(cc1C)cc(I)c1N)c2I GDAWHRVZNWKKCU-UHFFFAOYSA-N 0.000 description 1
- VZYSNPQRCFSFRK-UHFFFAOYSA-N CCCCC(CC1)CCC1C(C(F)=C1F)=CC2C1OC(C)CC2 Chemical compound CCCCC(CC1)CCC1C(C(F)=C1F)=CC2C1OC(C)CC2 VZYSNPQRCFSFRK-UHFFFAOYSA-N 0.000 description 1
- ZPAFXUXFFBEJPE-UHFFFAOYSA-N CCCCCC(CC1)CCC1c(c(F)c1F)cc2c1OC(CCC)C=C2 Chemical compound CCCCCC(CC1)CCC1c(c(F)c1F)cc2c1OC(CCC)C=C2 ZPAFXUXFFBEJPE-UHFFFAOYSA-N 0.000 description 1
- PSMNNEZJWWXSJR-UHFFFAOYSA-N CCc(cc1)ccc1-c(cc(CCC(C)=O)c(O)c1F)c1F Chemical compound CCc(cc1)ccc1-c(cc(CCC(C)=O)c(O)c1F)c1F PSMNNEZJWWXSJR-UHFFFAOYSA-N 0.000 description 1
- QKPHVMLZCDIGDD-UHFFFAOYSA-N CCc(cc1)ccc1-c(cc(CCC(C)O)c(O)c1F)c1F Chemical compound CCc(cc1)ccc1-c(cc(CCC(C)O)c(O)c1F)c1F QKPHVMLZCDIGDD-UHFFFAOYSA-N 0.000 description 1
- AJKNNUJQFALRIK-UHFFFAOYSA-N Fc(cccc1F)c1F Chemical compound Fc(cccc1F)c1F AJKNNUJQFALRIK-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
- C09K19/3402—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having oxygen as hetero atom
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
- C07D311/58—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4
- C07D311/60—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4 with aryl radicals attached in position 2
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
- C07D311/58—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
- C09K19/3402—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having oxygen as hetero atom
- C09K2019/3422—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having oxygen as hetero atom the heterocyclic ring being a six-membered ring
- C09K2019/3425—Six-membered ring with oxygen(s) in fused, bridged or spiro ring systems
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
Definitions
- the present invention relates to chroman derivatives, processes for their preparation and their use as component (s) in liquid-crystalline media. Moreover, the present invention relates to liquid crystal and electro-optical display elements containing the liquid-crystalline media of the invention.
- liquid-crystalline compounds according to the invention can be used as component (s) of liquid-crystalline media, in particular for displays based on the principle of the twisted cell, the guest-host effect, the effect of deformation of upright phases DAP or ECB (Electrically Controlled Birefringence), based on the IPS effect (In Plane Switching) or the effect of dynamic dispersion.
- Benzo-fused oxygen heterocycles are suitable components for liquid crystalline mixtures that can be used in liquid crystal and electro-optic display elements.
- the compounds according to the invention should have the broadest possible nematic phase and should be miscible with nematic base mixtures, especially at low temperatures.
- chromane derivatives of the invention excellent liquid-crystalline component (s) are suitable media. With their help, it is possible to obtain stable, liquid-crystalline media, in particular suitable for TFT or STN displays.
- the compounds of the invention are both thermal and
- the compounds according to the invention have a broad nematic phase range as well as a high voltage holding ratio. Another advantage is the good solubility of the compounds of the invention, due to which they are particularly suitable for increasing the
- the physical properties of the liquid crystals according to the invention can be varied within wide limits.
- the erfindungs ⁇ derivatives according to the invention also characterized by positive elastic properties.
- Liquid-crystalline media with very low optical anisotropy values are of particular importance for reflective and transflective applications, i. Such applications in which the respective LCD experiences no or only supportive backlight.
- the chroman derivatives of the invention have a wide range of applications. Depending on the choice of substituents, these compounds may serve as base materials from which liquid crystalline media are predominantly composed. However, liquid-crystalline base materials from other classes of compounds may also be added to the compounds according to the invention in order, for example, to influence the dielectric and / or optical anisotropy of such a dielectric and / or to optimize its threshold voltage and / or its viscosity.
- the chroman derivatives according to the invention are colorless in the pure state and form liquid-crystalline mesophases in a temperature range which is favorably located for the electro-optical application. Chemically, thermally and against light, they are stable.
- the present invention thus provides chroman derivatives of the general formula (I)
- R k is H, F, Cl, NCS, CN, SF 5 , an alkyl or alkoxy radical having 1 to 15 C atoms, an alkenyl or alkenyloxy radical having 2 to 15 C atoms, an alkyl radical which is substituted by one or more fluorine atoms or alkoxy radical having 1 to 15 C atoms or an alkenyl or alkenyloxy radical having 2 to 15 C atoms substituted by one or more fluorine atoms,
- a 1 , A 2 are each independently, the same or different a) trans-1,4-cyclohexylene, in which also one or more non-adjacent CH 2 groups can be replaced by -O- and / or -S-,
- Piperidine-1 4-diyl, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl and 1,2,3,4-tetrahydronaphthalene-2,6-diyl, or
- Z 1 , Z 2 are each, independently of one another, the same or different -O-,
- -O-CO-CF CF-, -C ⁇ C- or a single bond
- L 1 , L 2 , L 3 are each independently, same or different H, F,
- n 0, 1, 2, 3 or 4, preferably 0, 1, 2 or 3 and particularly preferably 0, 1 or 2, and
- L 1 , L 2 , L 3 and L 4 each independently, identically or differently H, F, Cl, NCS, CN, SF 5 , a substituted by one or more fluorine atoms alkyl or alkoxy radical having 1 to 15 carbon atoms or a substituted by one or more fluorine atoms alkenyl or Alkenyloxyrest having 2 to 15 carbon atoms, preferably H, F, Cl or CN, and particularly preferably H or F, wherein
- one of the two radicals L 2 and L 3 additionally can also assume the meaning of R 2 with respect to formula (I) and
- L b and L b are each independently, identically or differently H, F, Cl or CN and one of the two radicals additionally also - (Z 2 -A 2 -) n R 2 ,
- R 1 , A 1 , Z 1 , L 1 , L 2 , L 3 , L 4 and m have the meanings given in relation to formula (II).
- Another object of the present invention is the use of chroman derivatives of the formulas (I) and (II) and chromene derivatives of the formulas (III) to (VI) as component (s) in liquid-crystalline media.
- liquid-crystalline media having at least two liquid-crystalline components which contain at least one chroman and / or chromene derivative of the formulas (I) to (VI).
- the present invention also provides liquid-crystal display elements, in particular electro-optical display elements, which contain a liquid-crystalline medium according to the invention as a dielectric.
- the compounds of the formula (I) to (VI) according to the invention have a negative ⁇ . Due to the negative ⁇ , these compounds are particularly suitable for use in VA displays.
- the present invention thus also relates in particular to VA TFT displays with dielectrics which contain at least one chroman derivative and / or chromene derivative of the formulas (I) to (VI) with negative ⁇ .
- the compounds of the formula (I) to (VI) according to the invention have a positive ⁇ . Due to the positive ⁇ , these compounds are particularly suitable for use in highly polar mixtures.
- the present invention thus also relates in particular to TFT displays with a low threshold voltage (so-called “low-V th TFT displays”) and IPS displays (so-called “in plane switching displays”), with dielectrics having at least one chroman - And / or chromene derivative of the formulas (I) to (Vl) with positive ⁇ included.
- the compounds of the formula (I) to (VI) according to the invention additionally have a low birefringence ⁇ n in addition to a positive ⁇ , these compounds are suitable in particular for use in reflective and transflective liquid crystal display elements and other low birefringence liquid crystal displays ⁇ n, so-called "low ⁇ n mode displays", such as reflective and transflective TN displays.
- the present invention thus also relates in particular to reflective and transflective TN displays with dielectrics which contain at least one chroman and / or chromene derivative of the formulas (I) to (VI) with a positive ⁇ .
- the chroman and chromene derivatives of the formulas (I) to (VI) according to the invention with positive ⁇ find use as polar clarifiers in displays which are operated at a temperature at which the control media are in the isotropic phase or in an optically isotropic phase Phase present.
- Such displays are e.g. in DE-A-102 17 273, DE-A-102 53 325, DE-A-102 53 606 and DE-A-103 13 979.
- formulas (I) to (VI) includes all isotopes of the chemical elements bound in the compounds of formulas (I) to (VI).
- Compounds of the formulas (I) to (VI) also as chiral dopants and in general for the achievement of chiral mesophases.
- R 1 , R 2 , A 1 , A 2 , Z 1 , Z 2 , L 1 , L 2 , L 3 , L 4 , L 5 , L 6 , m and n have the meanings indicated, if not expressly stated otherwise. If the radicals A 1 and Z 1 and also A 2 and Z 2 occur more than once, they may independently of one another take on the same or different meanings.
- Cyc means a 1, 4
- Cyclohexylene radical Che is a 1,4-cyclohexenylene radical, Dio is 1,3-dioxane-2,5-diyl radical, Thp is a tetrahydropyran-2,5-diyl radical, di-1, 3-dithian-2,5-diyl radical, Phe a 1, 4-phenylene radical, Pyd is a pyridine-2,5-diyl radical, Pyr is a pyrimidine-2,5-diyl radical, Bco is a bicyclo- (2,2,2) -octylene radical and Dec is a decahydronaphthalene radical, where Cyc and / or Phe unsubstituted or mono- or polysubstituted by -CH 3 , -Cl, -F and / or -CN may be substituted.
- R 1 is H, a linear alkyl or alkoxy radical having 1 to 10 C atoms or a linear alkenyl or alkenyloxy radical having 2 to 10 C atoms.
- R 1 is halogen, it preferably means F or Cl, more preferably F.
- R 2 is F, Cl, CN, SF 5 , CF 3 , OCF 3 or OCHF 2 , particularly preferably F, CN, CF 3 or OCF 3 and in particular F ,
- a 1 and A 2 are preferably Phe, Cyc, Che, Pyd, Pyr or Dio, and particularly preferably Phe or Cyc. Further preferred compounds of the formulas (I) to (VI) which contain no more than one of the radicals Dio, Dit, Pyd, Pyr or Bco.
- Phe is especially preferred
- the cyclohexene-1,4-diyl group preferably has the following structures:
- L 1, L2 1, L3, L4 1, L5 and L is preferably H or F.
- Preferred chroman derivatives of the general formula (I) are the following formulas (Ia) to (Id):
- R 1 , R 2 , A 1 , A 2 , Z 1 , Z 2 , L 1 , L 2 , L 3 , m and n have the meanings given in relation to formula (I).
- Preferred chroman derivatives of the general formula (Ia) are the following formulas (Ia1) to (Ia6): wherein R 1 , R 2 , A 1 , A 2 , Z 1 , Z 2 , L 1 , L 2 and L 3 have the meanings given in relation to formula (I).
- a particularly preferred compound of sub-formula (Ia1) is that of sub-formula (Ia1a):
- R 1 and R 2 have the meanings given in relation to formula (I) and L 1 , L 2 , L 3 and L 4 independently of one another, identically or differently, denote H or F.
- Particularly preferred compounds of sub-formula (Ia2) are those of sub-formula (Ia2a) to (Ia2c):
- R 1 and R 2 are the meanings given in relation to formula (I) a and LL 11 ,, LL 22 , LL 33 , LL 44 , LL 55 and LL 66 independently of one another, the same or different H or F mean.
- a particularly preferred compound of sub-formula (Ia3) is that of sub-formula (Ia3a):
- R 1 and R 2 have the meanings given in relation to formula (I) and L 1 , L 2 , L 3 , L 4 , L 5 , L 6 , L 7 and L 8 independently, identically or differently H or F. mean.
- Particularly preferred compounds of sub-formula (Ia4) are those of sub-formulas (Ia4a) to (Ia4c):
- R 1 and R 2 have the meanings given in relation to formula (I) and L 1 , L 2 , L 3 and L 4 independently of one another, identically or differently, denote H or F.
- Particularly preferred compounds of the sub-formula (Ia5) are those of the sub-formulas (Ia5a) to (Ia5i), in particular those of the sub-formulas (Ia5a) to (Ia5c),
- R 1 and R 2 have the meanings given in relation to formula (I) and L 1 , L 2 , L 3 , L 4 , L 5 and L 6 independently, identically or differently mean H or F.
- Preferred chroman derivatives of the general formula (Ib) are the following formulas (IbI) to (Ib6):
- R 1 , R 2 , A 1 , A 2 , Z 1 , Z 2 , L 1 , L 2 and L 3 have the meanings given in relation to formula (I).
- chroman derivatives of the general formulas (Ib1) to (Ib6) in which L 3 H and L 1 and L 2 are independently, identically or differently H or F, it being particularly preferred if at least one of Radicals L 1 and L 2 F means.
- Particularly preferred compounds of sub-formula (IbI) are those of sub-formulas (IbIa) to (IbIc):
- R 1 and R 2 have the meanings given in relation to formula (I) and L 1 and L 2 are independently, identically or differently H or F, particularly preferably at least one of L 1 and L 2 is F, in particular but both of the leftovers.
- Particularly preferred compounds of sub-formula (Ib2) are those of sub-formulas (Ib2a) to (Ib2c):
- R 1 and R 2 have the meanings given in relation to formula (I) and L 1 and L 2 are independently, identically or differently H or F, particularly preferably at least one of L 1 and L 2 is F, in particular but both of the leftovers.
- Particularly preferred compounds of sub-formula (Ib4) are those of sub-formulas (Ib4a) and (Ib4b):
- R 1 and R 2 have the meanings given in relation to formula (I) and L 1 and L 2 are independently, identically or differently H or F, particularly preferably at least one of L 1 and L 2 is F, in particular but both of the leftovers.
- Preferred chroman derivatives of the general formula (II) are the following formulas (IIa) to (Hd):
- R 1 , A 1 , Z 1 , L 1 , L 2 , L 3 , L 4 and m have the meanings given in relation to formula (II) and R 2 with respect to formula (I).
- Preferred chroman derivatives of the general formula (IIa) are the following formulas (Ila1) to (Ila3):
- R 1 , A 1 , Z 1 , L 1 , L 2 and L 3 have the meanings given in relation to formula (II) and R 2 with respect to formula (I).
- Particularly preferred compounds of the sub-formula (Mal) are those of the sub-formula (IIa1a) and (Halb):
- R 1 and R 2 have the meanings given in relation to formula (I) and L 1 and L 2 independently of one another, identically or differently, denote H or F.
- Preferred chroman derivatives of the general formula (IIb) are the following formulas (I IbI) to (IIb3):
- R 1 , A 1 , Z 1 , L 1 , L 2 and L 3 have the meanings given in relation to formula (II) and R 2 with respect to formula (I).
- Particularly preferred compounds of the sub-formula (IIb1) represent those of the sub-formulas (MbIa) and (IIbi b):
- R 1 and R 2 have the meanings given in relation to formula (I) and L 1 and L 2 are independently, identically or differently H or F, particularly preferably at least one of L 1 and L 2 is F, in particular but both of the leftovers.
- the chroman derivatives of the general formulas (Ila1) to (Ila3) preferably have the following structures:
- R 1 , A 1 , Z 1 , m and L 1 have the meanings given in relation to formula (II).
- L 1 is preferably F or CF 3 .
- R 2 assumes the meanings given in relation to formula (I).
- R 1 , A 1 , Z 1 , m and L 1 have the meanings given in relation to formula (II).
- L 1 is preferably F or CF 3 .
- R 2 assumes the meanings given in relation to formula (I).
- the compounds of the formula (II), (IIa) to (Hd) and their sub-formulas include compounds having a ring in the mesogenic group R 1 (-A 1 -Z 1 ) m - of the subformulae a and b:
- R 1 -A 1 -Z 1 -A 1 -A 1 -Z 1 - m R 1 -A 1 -A 1 -Z 1 -A 1 -Z 1 - n
- sub-formulas a, b, c, d, e, g, h and i are particularly preferred.
- the preferred compounds of sub-formula a include those of sub-formulas aa to ad:
- sub-formula b include those of sub-formulas ba and bb:
- sub-formula Ic include those of sub-formulas ca to cm:
- the preferred compounds of sub-formula d include those of sub-formulas da to dn:
- the preferred compounds of sub-formula e include those of sub-formulas ea to ej:
- R 1 phe-Z 1 -phe- eg
- the preferred compounds of sub-formula f include those of sub-formulas fa to fe:
- the preferred compounds of partial formulas g to n include those of the following partial formulas ga to ma:
- R 1 , A 1 and Z 1 have the meanings given above. If A 1 and / or Z 1 occur several times in one of the subformulae, they may independently of one another be the same or different.
- R 1 preferably denotes a linear alkyl or alkoxy radical having 1 to 7 C atoms or a linear alkenyl or alkenyloxy radical having 2 to 7 C atoms and particularly preferably a linear alkyl radical having 1 to 7 C Atoms or a linear alkenyl radical having 2 to 7 carbon atoms.
- Z 1 is preferably -CH 2 CH 2 -, -C ⁇ C-, -CF 2 CF 2 -, -COO-, -OCO-, -CF 2 O- or -OCF 2 -.
- R 1 or R 2 in the formulas above and below denotes an alkyl radical, this may be straight-chain or branched. It is particularly preferably straight-chain, has 1, 2, 3, 4, 5, 6 or 7 C atoms and accordingly denotes methyl, ethyl, propyl, butyl, pentyl, hexyl or heptyl, furthermore octyl, nonyl, decyl, undecyl, dodecyl , Tridecyl, tetradecyl or pentadecyl.
- R 1 or R 2 is an alkyl radical in which one CH 2 group has been replaced by -O-, this may be straight-chain or branched. It is preferably straight-chain and has 1 to 10 carbon atoms. Particularly preferably, the first CH 2 group of this alkyl radical is replaced by -O-, so that the radical R 1 is alkoxy and methoxy, ethoxy, propoxy, butoxy, pentyloxy, hexyloxy, heptyloxy, octyloxy or nonyloxy.
- Preferred alkenyl groups are C 2 -C 7 -I E-alkenyl, C 4 -C 7 -EE-alkenyl,
- alkenyl groups are vinyl, 1E-propenyl, 1E-butenyl, 1E-pentenyl, 1E-hexenyl, 1E-heptenyl, 3-butenyl, 3E-pentenyl, 3E-hexenyl, 3E-heptenyl, 4- Pentenyl, 4Z-hexenyl, 4E-hexenyl, 4Z-heptenyl, 5-hexenyl and 6-heptenyl. Groups of up to 5 carbon atoms are especially preferred.
- R 1 is an alkyl radical in which one CH 2 group has been replaced by -O- and one by -CO-, these are preferably adjacent. Thus, they include an acyloxy group -CO-O- or an oxycarbonyl group -O-CO-. These are particularly preferably straight-chain and have 2 to 6 C atoms.
- R 1 is a monosubstituted by CN or CF 3 alkyl or alkenyl radical, this radical is preferably straight-chain and the substitution by CN or CF 3 in ⁇ -position.
- R 1 or R 2 is an alkyl or alkenyl radical which is at least monosubstituted by halogen, this radical is preferably straight-chain.
- Halogen is preferably F or Cl. In the case of multiple substitution, halogen is preferably F.
- the resulting radicals also include perfluorinated radicals. For single substitution, the fluoro or chloro substituent may be in any position, but preferably in the ⁇ position.
- Branched groups of this type preferably contain no more than one chain branch.
- the formulas (I) to (VI) include both the racemates of these compounds and the optical antipodes and mixtures thereof.
- the compounds of the general formulas (I) to (VI) can be prepared by methods known per se, as described in the literature (for example in the standard works such as Houben-Weyl, Methods of Organic Chemistry, Georg Thieme Verlag, Stuttgart) are under reaction conditions which are known and suitable for the reactions mentioned. One can make use of known per se, not mentioned here variants.
- the starting materials for the above processes are either known or can be prepared in analogy to known compounds. They are thus available according to generally available literature regulations or commercially available.
- the starting materials can also be formed in situ, such that they are not isolated from the reaction mixture, but immediately further reacted to give the compounds of the general formulas (I) to (VI).
- a preferred synthesis of the compounds of the general formulas (Ib) and (III) can be carried out according to the methods described in the literature, for example in Houben Weyl, Methods of Organic Chemistry, Georg Thieme Verlag, Stuttgart, New York, 4. Aufl. 1993, described methods.
- a preferred process is the preparation of compounds of general formula (Ib) by ring-closing metathesis of the appropriately substituted dienes 3, which are available according to S. Chang, RH Grubbs, J. Org. Chem. 1998, 63, 864-866.
- the chromenes of the general formula (III) thus obtained can be converted by catalytic hydrogenation to the chromans of the general formula (Ib), as shown in Scheme 1.
- the compounds of general formula (Ib) according to the invention may also be obtained by intramolecular cyclization of diols, e.g. by S. Kelly, B.C. Vanderplas, in J. Org. Chem. 1991, 56, 1325-1327 and shown in Scheme 2.
- the ketones 5 are obtained, which after reduction to the alcohol 6, e.g. with sodium borohydride and by subsequent treatment with sulfuric acid in glacial acetic acid to the compounds of formula (Ib) cyclize.
- Salicylaldehydes can be used as starting material for compounds 3 and 4.
- One possible method of preparing these salicylaldehydes is the reaction of commercial liquid crystal precursors 7 according to Scheme 3 below.
- the salicylaldehydes 9 can be obtained directly by ortho-metalation, trapping with a formamide derivative such as DMF and subsequent deprotection, for example by LR. Hardcastle, P. Quayle, ELM Ward in Tetrahedron Lett. 1994, 35, 1747-1748.
- the phenols 7 may also be first halogenated and then metalated after protection of the hydroxyl group by halogen-lithium exchange and reacted analogously to Scheme 4 to salicylaldehydes, e.g. from G.G. Finger, MJ. Gortakowski, R.H. Shiley, R.H. White in J. Amer. Chem. Soc. 1959, 81, 94-101 and shown in Scheme 4.
- the preparation of the chroman derivatives of the general formula (II) according to the invention is preferably carried out by reacting
- R 1 , A 1 , Z 1 and m have the meanings given in relation to formula (II), with a fluorinated in ortho position fluoroaromatics in an organic solvent and at low temperatures to the corresponding propanol derivative of the general formula (Villa) or (VIIIb) implements,
- R 1 , A 1 , X 1 , X 2 , X 3 , X 4 , Z 1 and m have the meanings given in relation to formula (II), and
- the chroman derivative obtained in this way can optionally be converted by dehydrogenation to the corresponding chromene derivative.
- the reaction in step a) preferably takes place in the presence of a Lewis acid.
- Lewis acids it is possible in principle to use all compounds known to the person skilled in the art, provided that they have no acidic protons.
- Particularly preferred are strong Lewis acids, in particular BF 3 etherate.
- the reaction can also be carried out without the addition of a Lewis acid.
- organic solvents all solvents suitable for this purpose can be used in step a). Preferred as
- solvents are diethyl ether, tetrahydrofuran (THF) and dimethoxyethane (DME) and mixtures thereof.
- low temperature is meant in the present application, a temperature in the range of -4O ° C to -100 ° C, preferably from -65 ° C to -85 ° C.
- the preparation of the oxetanes can be carried out according to all methods known in the art. Preferably, however, starting from diols of the following formulas, which are either commercially available or are easy to prepare. A process for their preparation is described e.g. in EP 0 967 261 B1. These diols can then be converted into oxetanes, for example, by the method described by Picard et al., Synthesis, 1981, 550-552, as shown in Scheme 5 below.
- the preparation of the ortho-metallated fluoroaromatics can also be carried out by all methods known to the person skilled in the art.
- preferred methods are the ortho-metallation of fluoroaromatics with butyllithium (BuLi), optionally with the addition of TMEDA or similar compounds for increasing the reactivity of the aggregated butyllithium, Schlosser-Lochmann base or lithium diisopropylamide (LDA) in each case at low temperatures or the halogen-metal exchange of iodine fluoroaromatics or bromine fluoroaromatics with BuLi at low temperatures (for example according to Org. React. 6, 1951 , 339-366) or iso-propylmagnesium chloride
- this step can also be followed by a re-metallization.
- lithium aromatics can be easily converted into the corresponding zinc aromatics by reaction with a ZnCl 2 solution.
- the ortho-metalated fluoroaromatic is then reacted with the oxetane in an organic solvent at low temperature, preferably in the presence of a Lewis acid as shown in Schemes 6a and 6b.
- the structurally isomeric alcohols can also be obtained in this way.
- the opening of the oxetane takes place with high regioselectivity on the less substituted side.
- the propanol derivative formed from the ortho-metalated fluoroaromatic and oxetane is then reacted in the presence of about 1 equivalent of a strong, non-nucleophilic base, e.g. Alkali hydride selected from NaH, KH, RbH or CsH, and potassium hexamethyldisilazane (KHMDS), preferably alkali metal hydride, more preferably KH, intramolecularly cyclized in an organic solvent.
- KHMDS potassium hexamethyldisilazane
- the products obtained in this way may optionally be reused as starting materials.
- the cyclization reactions may be followed by further reactions, e.g. the functionalization of the aromatic radical by introduction of further halogen substituents, such as chlorine, bromine or iodine, or by introduction of boronic acid groups by literature methods.
- further halogen substituents such as chlorine, bromine or iodine
- a preferred synthesis for the construction of aryl-substituted fluoro-benzochroman derivatives of the general formula (Ia) is carried out by Suzuki coupling of corresponding boronic acids or boronic acid esters with 7-bromo-8-fluoro-chromans or 7-bromo-6,8-difluoro-chromans according to the following scheme 10.
- the required boronic acid derivatives are prepared from bromine-substituted precursors by known methods, as disclosed, for example, in J. Org. Chem. 1995, 60, 7508-7510.
- the synthesis can be adapted by the choice of suitable starting materials to the particular desired compounds of general formula (Ia). That way you can among others, the particularly preferred compounds of the subformulae (IIIa) and (Ia2b) represent.
- the present invention also provides liquid-crystalline media comprising in addition to one or more compounds of the formulas (I) to (VI) according to the invention as further constituents 2 to 40, preferably 4 to 30 components.
- these media contain, in addition to one or more compounds according to the invention, 7 to 25 components.
- These further constituents are preferably selected from nematic or nematogenic (monotropic or isotropic) substances, in particular substances from the classes of azoxybenzenes, benzylideneanilines, biphenyls, terphenyls, 1,3-dioxanes, 2,5-tetrahydropyrans, phenyl or cyclohexyl benzoates, cyclohexane.
- phenylcyclohexyl or cyclohexyl esters phenyl or cyclohexyl esters of cyclohexylbenzoic acid, phenyl or cyclohexyl esters of cyclohexylcyclohexanecarboxylic acid, cyclohexylphenyl esters of benzoic acid, cyclohexanecarboxylic acid or cyclohexylcyclohexanecarboxylic acid, phenylcyclohexanes, cyclohexylbiphenyls, phenylcyclohexylcyclohexanes,
- L and E which may be identical or different, each independently represent a bivalent radical from the group consisting of -Phe-, -Cyc-, -Phe- , -Phe-Cyc, -Cyc-Cyc, -Pyr-, -Dio, -Thp-, -G-Phe- and -G-Cyc- and their mirror images formed group, wherein Phe is unsubstituted or substituted by fluorine 1 , 4-phenylene, cyc trans-1, 4-cyclohexylene or 1,4-cyclohexenylene, pyr pyrimidine-2,5-diyl or pyridine-2,5-diyl, dioio-1,3-dioxane-2,5-diyl, Thp tetrahydropyran-2,5-diyl and G 2- (trans-1,4-cyclohexyl) -
- one of L and E is Cyc or Phe.
- E is preferably Cyc, Phe or Phe-Cyc.
- the inventive media contain one or more components selected from the compounds of formulas 1, 2, 3, 4, 5 and 6, wherein L and E are selected from the group Cyc and Phe and simultaneously one or more components selected from the Compounds of the formulas 1, 2, 3, 4, 5 and 6, wherein one of the radicals L and E is selected from among
- Group Cyc and Phe and the other radical is selected from the group -Phe-Phe-, -Phe-Cyc-, -Cyc-Cyc-, -G-Phe- and -G-Cyc-, and optionally one or more Components selected from the compounds of the formulas 1, 2, 3, 4, 5 and 6, wherein the radicals L and E are selected from the group -Phe-Cyc, -Cyc-Cyc, -G-Phe and -G -Cyc-.
- R 'and / or R are each independently of one another alkyl, alkenyl, alkoxy, alkoxyalkyl, alkenyloxy or alkanoyloxy having up to 8 C atoms, -F, -Cl, -CN, -NCS, - (O) i CH 3 (K + I) F k Cl I , where i is 0 or 1, k and I are independently, the same or different, 0, 1, 2 or 3, but with the proviso that the sum (k + I) 1, 2 or 3 is.
- R 'and R each independently represent alkyl, alkenyl, alkoxy, alkoxyalkyl, alkenyloxy or alkanoyloxy having up to 8 C atoms in a smaller subgroup of the compounds of formulas 1, 2, 3, 4, 5 and 6 This smaller subgroup is called group A and the compounds are denoted by the subformulae 1a, 2a, 3a, 4a, 5a and 6a In most of these compounds, R 1 and R "are different from one another, one of these radicals usually being alkyl, alkenyl Is alkoxy or alkoxyalkyl.
- R " is -F, -Cl, -NCS or - (O) i CH 3 - (k +
- the compounds in which R "has this meaning are designated by the sub-formulas 1b, 2b, 3b, 4b, 5b and 6b.
- R has the meaning -F, -Cl, -NCS, -CF 3 , -OCHF 2 or -OCF 3 .
- R 1 has the meaning given for the compounds of the subformulae 1a to 6a and is preferably alkyl, alkenyl, alkoxy or alkoxyalkyl.
- R denotes -CN.
- This subgroup is referred to below as group C and the compounds of this subgroup are correspondingly assigned with partial formulas 1c, 2c, 3c 4c, 5c and 6c
- R 1 has the meaning given for the 5 compounds of the subformulae 1 a to 6a and is preferably alkyl, alkenyl, alkoxy or alkoxyalkyl ,
- the media according to the invention contain, besides the inventive 5 compounds of formulas (I), (II), (III), (IV), (V) and / or (VI) is preferably one or more compounds selected are from the groups A 1 B and / or C.
- the mass fractions of the compounds from these groups in the media according to the invention are preferably:
- Group A 0 to 90%, preferably 20 to 90%, particularly preferably 30 to 90%;
- Group B 0 to 80%, preferably 10 to 80%, particularly preferably 10 to 70%;
- Group C 0 to 80%, preferably 5 to 80%, particularly preferably 5 to 50%;
- the sum of the mass fractions of the compounds of the groups A, B and / or C contained in the respective erfindungs ⁇ contemporary media is preferably 5 to 90% and particularly preferably 10 to 90%.
- the media according to the invention preferably contain 1 to 40%, particularly preferably 5 to 30%, of the compounds according to the invention. Furthermore preferred are media containing more than 40%, particularly preferably 45 to 90%, of compounds according to the invention.
- the media preferably contain one, two, three, four or five compounds of the invention.
- L 1 , L 2 are independently -H or -F,
- n independently 1, 2, 3, 4, 5, 6, 7 or 8.
- the preparation of the liquid-crystal mixtures according to the invention is carried out in a conventional manner.
- the desired amount of the components used in lesser amount is dissolved in the components making up the main component, preferably at elevated temperature.
- the dielectrics may also other, known in the art and in the
- Literature described additives contain. For example, 0 to 15%, preferably 0 to 10%, of pleochroic dyes and / or chiral dopants may be added.
- the individual compounds added are used in concentrations of from 0.01 to 6%, preferably from 0.1 to 3%.
- concentration data of the other constituents of the liquid-crystal mixtures, ie of the liquid-crystalline or mesogenic compounds are given without consideration of the concentration of these additives.
- mixtures according to the invention which, in addition to one or more compounds of the formulas (I), (II), (III), (IV), (V) and / or (VI), two, three or more compounds selected from Tables A and / or B included.
- ⁇ n and ⁇ values of the compounds according to the invention were obtained by extrapolation from liquid-crystalline mixtures which consist of 10% of the respective compound according to the invention and 90% either of the commercially available liquid crystal ZLI 4792 ( ⁇ n and positive ⁇ values) or also commercially available liquid crystal ZLI 2857 (negative ⁇ values), both Fa. Merck, Darmstadt, passed.
- Example 2 In analogy to the synthesis described in Example 1 is obtained by Wittig reaction of 5- (4-trans-ethyl-cyclohexyl) -3,4-difluoro-2- (1 -p-tolyl-allyloxy) benzaldehyde with methylenetriphenyl- ⁇ 5- phosphane, the 1- (4-trans-ethyl-cyclohexyl) -2,3-difluoro-4- (1 -p-tolyl-allyloxy) -5-vinyl-benzene in 83 percent. Yield as a colorless solid.
- Example 9 Analogously to Example 9, the following compounds of Examples 10 to 17 are obtained using the corresponding oxetane precursors. If the lithiated aromatic is prepared by halogen-metal exchange, the solvent used is diethyl ether.
- Example 4307 Analogously to Example 4307, the following compounds of Examples 4308 to 4333 are obtained using the corresponding precursors.
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- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
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- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
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- Pyrane Compounds (AREA)
Abstract
Description
Claims
Priority Applications (3)
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EP05796927A EP1831190A2 (de) | 2004-10-07 | 2005-09-28 | Chroman-derivate sowie ihre verwendung in flüssigkristallinen medien |
JP2007535058A JP2008522958A (ja) | 2004-10-07 | 2005-09-28 | クロマン誘導体類、それらの調製方法、およびそれらの使用 |
US11/576,859 US20080020148A1 (en) | 2004-10-07 | 2005-09-28 | Chromane Derivatives Method for Production and the Use Thereof |
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US (1) | US20080020148A1 (de) |
EP (2) | EP2258695B1 (de) |
JP (1) | JP2008522958A (de) |
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TW (1) | TW200630465A (de) |
WO (1) | WO2006040009A2 (de) |
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WO2007147516A1 (en) * | 2006-06-23 | 2007-12-27 | Merck Patent Gmbh | Mesogenic compounds, liquid crystal medium and liquid crystal display |
WO2008092491A1 (de) * | 2007-01-31 | 2008-08-07 | Merck Patent Gmbh | Chromanverbindungen zur verwendung als komponenten in flüssigkristallinen medien z.b. in elektrooptischen anzeigeelementen |
US8182717B2 (en) | 2008-04-11 | 2012-05-22 | Jnc Corporation | Liquid crystal composition and liquid crystal display device |
JP2013112631A (ja) * | 2011-11-28 | 2013-06-10 | Dic Corp | 重合性液晶化合物 |
DE102013103563A1 (de) | 2013-04-10 | 2014-10-16 | Basf Se | Verfahren zur Herstellung von Citronellal |
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JP2010516792A (ja) * | 2007-01-31 | 2010-05-20 | メルク パテント ゲゼルシャフト ミット ベシュレンクテル ハフツング | クロマン化合物 |
DE102008004891A1 (de) | 2007-01-31 | 2008-08-07 | Merck Patent Gmbh | Chromanverbindungen |
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US8182717B2 (en) | 2008-04-11 | 2012-05-22 | Jnc Corporation | Liquid crystal composition and liquid crystal display device |
JP2013112631A (ja) * | 2011-11-28 | 2013-06-10 | Dic Corp | 重合性液晶化合物 |
DE102013103563A1 (de) | 2013-04-10 | 2014-10-16 | Basf Se | Verfahren zur Herstellung von Citronellal |
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JP2008522958A (ja) | 2008-07-03 |
EP2258695A3 (de) | 2011-04-13 |
KR20070074595A (ko) | 2007-07-12 |
EP2258695B1 (de) | 2013-05-29 |
EP1831190A2 (de) | 2007-09-12 |
WO2006040009A3 (de) | 2006-07-27 |
US20080020148A1 (en) | 2008-01-24 |
EP2258695A2 (de) | 2010-12-08 |
TW200630465A (en) | 2006-09-01 |
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