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Merck Patent Gesellschaft MIT Beschrankter Haftung

Merck Patent Gesellschaft

Werner Binder

Eike Poetsch

Michael Heckmeier

Volker Meyer

Peer Kirsch

Joachim Krause

Melanie Klasen-Memmer

Alexander Hahn

Volker Reiffenrath

Brigitte Schuler

Georg Luessem

Mark John Goulding

Lars Lietzau

Kevin Adlem

Warren L Duffy

Georg Lüssem

Achim Götz

Atsutaka Manabe

Kazuaki Tarumi

Bernhard Rieger

Andreas Taugerbeck

Ekkehard Bartmann

Markus Czanta

Ulrich Finkenzeller

Thomas Geelhaar

Helmut Haensel

Michael Schwarz

Michael Kompter

Juergen Eckstein

Stephan Gürtler

Stephan Guertler

Warren Duffy

The present invention relates to chemical compounds containing five or more benzene rings arranged in a linear manner and two bridging units between these rings, where at least one of these units represents a &#x2014;CFO&#x2014; bridge. The invention additionally relates to liquid-crystalline media and to high-frequency components comprising these media, in particular antennae, especially for the gigahertz range.

Liquid-crystalline compounds

The invention relates to pyran derivatives of the formula I and to a process and intermediates for their preparation and derivatisation, and to the use thereof in liquid-crystalline media.

Pyran compound or at least one derivative thereof

The invention relates to novel dioxane derivatives of the formula R-(A-Z)-G-(Z-A)-R, in which G denotes (I) or (II), and in which R, R, A, A, Z, Z, m and n have the meanings indicated in claim, to the use thereof as component(s) of liquid-crystalline media, and to liquid-crystal and electro-optical display elements which contain the liquid-crystalline media according to the invention. 

Spiro[3.3] heptyl-dioxan derivatives and their use in liquid crystal media

The invention relates to tetrahydropyran derivatives of the general formula I and to processes for the preparation thereof. 

Tetrahydropyran derivatives

The invention relates to liquid-crystalline compounds of the formula (I), where R, X, L, Y and W are as defined in claim 1, and to the use thereof in liquid-crystalline media, to liquid-crystalline media comprising at least one compound of the formula (I) and to electro-optical displays containing a liquid-crystalline medium of this type 

The invention relates to liquid-crystalline phenol esters of the formula I in whichR, A, Z, m, L and Y are as defined in Claim, to liquid-crystalline media comprising at least one phenol ester of the formula I, and to electro-optical displays containing such a liquid-crystalline medium.

Liquid-crystalline phenol esters

The invention relates to pyran derivatives of formula I and processes and intermediates for their preparation and derivatisation, and the use thereof in liquid-crystalline media.

Pyran derivatives containing an exocyclic double bond

The present invention relates to a process for the preparation of a compound of the general formulaR-(A-Z-)B&#x2014;CFO-A-(A)&#x2014;R'&#x2003;&#x2003;(I)in which 

Method for production naphthalene derivatives

The invention relates to liquid-crystalline phenol esters of the formula I in which

Aldehydes containing a difluorooxymethylene bridge, of the general formula IOHC-(A)-Z-(A-Z)-(A-Z)-AIand the use and preparation thereof and the preparation of 1,3-dioxane compounds.

Aldehydes containing a difluorooxymethylene bridge

A tetrahydropyran derivative comprising at least three cyclic rings and one aromatic endgroup of the formula Aa process for preparing said tetrahydropyran derivatives, and the use of said tetrahydropyran derivatives as a component in a liquid crystal composition.

Pyrans as liquid crystals

Tetrahydropyran derivatives having at least one ester group (&#x2014;CO&#x2014;O&#x2014;) and at least one group &#x2014;CN, &#x2014;NCS,&#x2014;F, &#x2014;Cl, &#x2014;OCHF, &#x2014;OCF, &#x2014;CF, &#x2014;OCHFCF, &#x2014;OCFCHFCF, SF, or &#x2014;OCFCF; a process for preparing said tetrahydropyran derivatives, and the use of said tetrahydropyran derivatives as a component in a liquid crystal composition.

A liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, including one or more compounds of the general formula I: ##STR1## in which, R is H, an alkyl or alkenyl radical having 1 or 2 to 15 carbon atoms respectively which is unsubstituted, monosubstituted by CN or .sub.CF. or at least monosubstituted by halogen, where one or more CH.sub.2 groups in these radicals may also, in each case independently of one another, be replaced by --O--, --S--, ##STR2## --CO--, --CO--O--, --O--CO--, or --O--CO--O-- in such a way that O atoms are not linked directly to one another,

Liquid-crystalline compounds, and liquid-crystalline medium

The invention relates to difluorovinyl ethers of the general formula I ##STR1## in which R, A, X and m are as defined in claim 1, and to the use of these compounds as components of liquid-crystalline media, and to liquid-crystal and electro-optical display elements which contain the novel liquid-crystalline media.

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Dieburg, Germany

Werner Binder