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| Number | Title | Issue Date |
| 8124817 | Process for the preparation of ring compounds In a process for the preparation of ring compounds via a combinatorial synthesis, the reaction procedure is based on a Suzuki coupling, subsequent halo-demetallation and finally a further Suzuki coupling. The Suzuki couplings are each carried out with a boronic acid... | 02/28/2012 |
| 7842845 | Process for the preparation of ring compounds In a process for the preparation of ring compounds via a combinatorial synthesis, the reaction procedure is based on a Suzuki coupling, subsequent halo-demetallation and finally a further Suzuki coupling. The Suzuki couplings are each carried out with a boronic acid... | 11/30/2010 |
| 7786332 | Process for the preparation of ring compounds In a process for the preparation of ring compounds via a combinatorial synthesis, the reaction procedure is based on a Suzuki coupling, subsequent halo-demetallation and finally a further Suzuki coupling. The Suzuki couplings are each carried out with a boronic acid... | 08/31/2010 |
| 7411100 | Process for the preparation of ring compounds In a process for the preparation of ring compounds via a combinatorial synthesis, the reaction procedure is based on a Suzuki coupling, subsequent halo-demetallation and finally a further Suzuki coupling. The Suzuki couplings are each carried out with a boronic acid... | 08/12/2008 |
| 7385067 | Process for the preparation of compounds having a CFO bridge The invention relates to a process for the preparation of compounds containing at least one —CF2—O— bridge in the molecule, in which a) an acid is added onto at least one ketene dithioketal, b) the... | 06/10/2008 |
| 7351452 | Liquid crystalline compounds containing a biphenyl core A compound of formula (I) or a dimer thereof; where R1 and R2 are independently selected from optionally substituted alkyl, optionally substitituted alkenyl, optionally substit... | 04/01/2008 |
| 7318950 | Chiral compounds II The invention relates to chiral compounds of formula (I) R1—X1-(A1-Z1)m-G-(Z2-A2)n-X2—R2, wherein R1, R2, X1, X2 | 01/15/2008 |
| 7270856 | Cyclobutane derivatives The invention relates to novel cyclobutane derivatives of the formula (I), in which R1, R2, A, Z, m, n and o have the meaning indicated in claim 1, to the use thereof as components of liquid-crystalline media, and to liquid-crystal and e... | 09/18/2007 |
| 7244545 | Fluorinated compound, fluoropolymer and process for its production The present invention provides a fluorinated compound having functional groups in a high concentration so that adequate characteristics of the functional groups can be obtained and having high transparency in a wide wavelength region, a fluoropolymer, and a process ... | 07/17/2007 |
| 7182885 | Fluorinated indenes and 1,7-dihydroindacenes of negative dielectric anisotropy Fluorinated indenes and 1,7-dihydroindacenes of the general formulae (I) and (II) of negative dielectric anisotropy (Δε | 02/27/2007 |
| 7135210 | Liquid crystal compounds The invention relates to liquid crystal compounds of formula (I), where X1, X2, X3, Z1, Z2, L1, L2, L3, L4, L5, L6, L7, L8,... | 11/14/2006 |
| 7074462 | Ester compounds and their use in liquid crystalline media The invention relates to compounds of the formula I and to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I ... | 07/11/2006 |
| 7074464 | Perfluoropropenyl-containing compound, liquid crystal composition and liquid crystal display element A compound represented by the formula (1). wherein Ra is alkyl having 1 to 10 carbon(s) and, in that alkyl, any of —CH2— may be replaced with —O—, —S—, —CO—, —CH═CH— or —C≡C... | 07/11/2006 |
| 7029730 | CFO-bridged, axially substituted cyclohexane derivatives The invention relates to CF2O-bridged cyclohexane derivatives, in particular compounds of formula (I), R1-(-A1-Z1-)k1-Q-CF2O-A2-(-Z3-A3-)K3-R2, wherein Q represents group (a); W1, W2 represent —CH2— and/or —O— inde... | 04/18/2006 |
| 7026021 | Fluorinated heterocycles and their use in liquid-crystal mixtures Compounds of the general formula (I) where: R1, R2 are each independently a) H b) -M1-A1-R5 | 04/11/2006 |
| 6916513 | 2,4′-Substituted 6-cyclohexyl-trans-decalines The invention relates to 2,4′-substituted 6-cyclohexyl-trans-decalins of the general formula I in which R1, R2 and Z are as defined in Claim 1, to the use thereof as components of liquid-... | 07/12/2005 |
| 6903230 | Process for producing a fluorine-containing compound It is to provide a process for synthesizing an intended fluorine-containing compound having a geminal difluoro structure with a high yield, by subjecting a carbonyl compound which is readily available to a two-stage reaction. A compound (1) such as ethyl 4-ox... | 06/07/2005 |
| 6780477 | Liquid crystalline compounds The invention relates to liquid-crystalline compounds of the formula I in which R1, R2, A1, A2, A3, A4, Z1, Z2, a, b and c ar... | 08/24/2004 |
| 6713135 | Materials for inducing alignment in liquid crystals and liquid crystal displays The present invention provides novel polyimides, poly(amic acids) and poly(amide esters) thereof, and optical alignment layers derived therefrom, for inducing alignment of liquid crystals and liquid crystal displays. The novel compositions comprise side-chain polyme... | 03/30/2004 |
| 6685995 | Ester compounds, liquid crystal compositions and liquid crystal display devices Liquid crystalline compounds suitable for driving at a low voltage and at a wide temperature range, and suitable for high speed response, liquid crystal compositions comprising the compound, and liquid crystal display devices comprising the liquid crystal... | 02/03/2004 |
| 6632484 | Dialkyne compounds Described are dialkyne compounds of the formula I ##STR1## in which n, m, R1, R2, X1, X2, X3, X4, Z1, Z2, A1, A2, Q, Y1 and Y2 a... | 10/14/2003 |
| 6630210 | Pentafluorosulfuranylbenzene derivatives The invention relates to pentafluorosulfuranylbenzene derivatives of the formula I ##STR1## in which R1, A1, A2, Z1, L1, L2, L3 and n are as defined herein and to the use thereof... | 10/07/2003 |
| 6610219 | Functional materials for use in optical systems Functional optical materials for optical systems that are typically useful in optical waveguides, optical switching systems, optical modulators, optical computing systems and the like. Included are polymer systems and electrooptical chromophores. Polymers... | 08/26/2003 |
| 6551666 | Cyclohexane derivatives and liquid-crystalline medium The invention relates to cyclohexane derivatives of the formula I ##STR1## in which n, m, p, R1, X1, X2, Z1, Z2, Z3, A1 A2 and Y are as defined above.... | 04/22/2003 |
| 6475595 | Fluorocyclohexene derivatives, and liquid-crystalline medium Fluorocyclohexene derivatives of formula I R1 --(A1 --Z1)n --A--(Z2 --A2)m --Z3 --B--(Z4 --A3)p --R2 I, in which n, m, p, R1 | 11/05/2002 |
| 6458433 | Difluorophenyl derivatives, liquid-crystal compounds, and liquid-crystal composition Disclosed are liquid crystalline compounds which (i) are characterized in that the compounds have a wide temperature range in which the compounds exhibit a liquid crystal phase, are low in viscosity, and have a negative and large Ɗ&3xb5;, (ii) are readil... | 10/01/2002 |
| 6391397 | High transverse dipole moment aryl compounds A fluorinated phenyl compound having the general formula [1]: ##STR1## wherein each of s, v and x=0 or 1, each of t and u=1, 2 or 3, and each of y and z=0, 1 or 2; A, B and C are independently selected from conjugated cyclic moieties including heterorings... | 05/21/2002 |
| 6380432 | Materials for inducing alignment in liquid crystals and liquid crystal displays The present invention provides novel aromatic diamines useful in preparing polyimides for optical alignment layers in liquid crystal displays. The novel compositions comprise side-chains general formula I --L1 --D--L2 --Cf wher... | 04/30/2002 |
| 6348244 | Liquid-crystal compounds having large negative value of permittivity anisotropy, liquid-crystal composition, and liquid-crystal display element An object of the present invention is to provide novel liquid crystalline compounds having a negative and extremely large dielectric anisotropy value and a small optical anisotropy value together, to provide liquid crystal compositions comprising the liqu... | 02/19/2002 |
| 6342572 | Flame retardant benzocyclobutene resin with reduced brittleness The invention pertains to benzocyclobutene resins having flame retardant properties. Such resins have a high glass transition temperature (Tg>250° C.), low moisture absorption, low dielectric constant, good mechanical properties, flame retardancy (meets ... | 01/29/2002 |
| 6329529 | Nitrogen-based halogenating agents and process for preparing halogen-containing compounds Disclosed are a fluorinating agent represented by the general formula (1): ##STR1## wherein R1 to R4 are a substituted or unsubstituted, saturated or unsaturated alkyl group or a substituted or unsubstituted aryl group, and can be th... | 12/11/2001 |
| 6309561 | Liquid crystal compounds having a chiral fluorinated terminal portion Fluorine-containing, chiral liquid crystal compounds comprise (a) a chiral fluorochemical terminal portion comprising (i) at least one chiral center, which can optionally be heteroatom-substituted; (ii) a terminal fluoroalkyl, fluoroether, perfluoroalkyl,... | 10/30/2001 |
| 6242645 | Thermally stable aminosulfur trifluorides Diaryl-, dialkoxyalkyl-, alkylalkoxyalkyl-, arylalkoxyalkyl- and cyclic aminosulfur trifluorides fluorinating agents are disclosed.... | 06/05/2001 |
| 6231934 | Alkenyl compound, liquid crystal composition, and liquid crystal display device The liquid crystalline compound is expressed by the general formula (1) Ra-A1 -Z1 -A2 -Z2 -A3 -Z3 -A4 -Rb (1) wherein Ra represents an alkenyl group having 2 to 20 carbon atoms or an alk... | 05/15/2001 |
| 6222064 | Fluorination with aminosulfur trifluorides A fluorination method of oxygen and halogen sites with diaryl-, dialkoxyalkyl-, alkylalkoxyalkyl-, arylalkoxyalkyl- and cyclic aminosulfur trifluorides fluorinating reagents is disclosed.... | 04/24/2001 |
| 6200654 | 1,4-disubstituted 2,6-difluorobenzene compounds, and a liquid-crystalline medium 1,4-disubstituted 2,6-difluorobenzene compound of formula I ##STR1## wherein R is an alkyl or alkenyl radical, A1 and A2, in each case independently of one another, are (a) a trans-1,4-cyclohexylene radical in which a CH2 group may ... | 03/13/2001 |
| 6183822 | Polymerizable mesogenic fluorophenylenes The invention relates to polymerizable fluorophenylenes of formula I ##STR1## wherein P, Sp, X, n, L, Z1, Z2, A, B, m and R have the meaning of claim 1, to a polymerizable liquid crystalline composition comprising at least one polyme... | 02/06/2001 |
| 6171664 | Tolan derivatives, and liquid-crystalline medium The invention relates to tolan derivatives of the formula I ##STR1## in which R1, R2, A, Z, L1, L2, L3, L4, L5, L6, Q, m and n are as defined herein.... | 01/09/2001 |
| 6117361 | Liquid crystal compound having fluorine-substituted 1,4-phenylene moiety, liquid crystal composition and liquid crystal display element A compound represented by the following general formula (1) is provided. This has broader temperature range of nematic phase, lower viscosity and higher miscibility with other liquid crystal compounds at low temperature than those of conventional liquid c... | 09/12/2000 |
| 5981422 | Fluorous multiphase system Stoichiometric and catalytic chemical transformations may be carried out in solution using novel fluorous multiphase systems (FMS). The term "fluorous" is defined as a carbon-fluorine bond rich organic molecule which is generated by replacing hydrogen ato... | 11/09/1999 |
