Merck Patent Gmbh

Christian Jasper

Detlef Pauluth

Atsutaka Manabe

Volker Reiffenrath

Elvira Montenegro

Dagmar Klass

Constanze Brocke

Michael Wittek

Brigitte Schuler

Helmut Haensel

Joerg Von Hagen

David Maillard

Renate Seeger

Andreas Waechtler

Marcel Breuning

Michael Junge

Lars Lietzau

Markus Czanta

Izumi Saito

Dmitry Ushakov

Timo Uebel

Susann Gunst

Andreas Pohle

Sven Baran

Beate Schneider

Ewgenij Wakaresko

Hadia Saleh-Kassim

Joern Kolb

Jeremy Maurin

Marcel André Breuning

Atsutata Manabe

Volker Rieffenrath

The present invention relates to liquid-crystalline media comprising one or more compounds of formula DFS in which the groups and parameters occurring have the meanings indicated in claim, to high-frequency components comprising same, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, in particular for microwave phased-array antennas. The present invention further relates to novel mesogenic compounds.

Liquid-crystalline medium

The invention relates to compounds of the formula I, in which R, A, Z, m, L, L, Land X have the meanings indicated in Claim, to a process for the preparation thereof, and 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.

Naphthalene compounds for liquid-crystalline mixtures

The present invention relates to liquid crystal mixtures comprising one or more compounds of the formula A and, in addition one or more compounds of formula I or one or more compounds of formula II wherein the individual radicals have the respective meanings indicated in claim, to the use thereof for high-frequency components, and to high-frequency components, in particular antennae, especially for the gigahertz range, comprising these media.

The present invention relates to liquid-crystalline media comprising in which the parameters R-R, Z, Z, Zand rings A, A, A, A, A, A, and Aare as defined herein, and to components comprising these media for high-frequency technology, in particular phase shifters and microwave array antennas.

Liquid-crystalline medium and high-frequency components comprising same

The present invention relates to cell culture media comprising inorganic ester derivatives of tyrosine and/or cysteine. The poor solubility of tyrosine and the often non-sufficient stability of cysteine in cell culture media is overcome by substituting them with an inorganic ester derivative, e.g. with a phosphorylated derivative.

Cell culture media

The invention relates to a liquid-crystalline medium which comprises at least one compound of the formula I,  in such a way that O atoms are not linked directly to one another, and in which, in addition, one or more H atoms may be replaced by halogen, 

Liquid-crystal medium

A liquid-crystal medium having a component A which is one or more compounds of the formula IA and corresponding, novel mesogenic compounds and the preparation thereof. These liquid-crystal media, are used in components for high-frequency technology, and to components of this type which contain the media. The components are suitable, in particular, for phase shifters in the microwave and millimeter wave region, for microwave and millimeter wave array antennae and very particularly for so-called tunable 'reflectarrays'.

Mesogenic compounds, liquid crystal media and components for high frequency technology

The invention relates to substituted quinquephenyls of the formulae indicated in the claims and description. They are particularly suitable as UV-stabilizing component in liquid-crystalline media.

Substituted polyphenyls

The present invention relates to a method for the racemization of enantiomerically pure or enantiomerically enriched Praziquantel under basic conditions and a method for the production of (R)-Praziquantel in enantiopure or enantiomerically enriched form, which comprises the racemization method.

Method for the production of praziquantel

The invention relates to an electro-optical liquid-crystal display having a re-alignment layer for re-alignment of the liquid crystals whose field has a component, crucial for the re-alignment, parallel to the liquid-crystal layer, containing a liquid-crystalline medium, characterized in that it comprises one or more compounds of the formula I1 to I3, (I1) (I2) (I3) and at least one compound of the formula II, in which the parameters R, R*, Z, Sp, k, l, p, Yto Y, Rand Rhave the meanings indicated in claim

Liquid-crystalline medium and electro-optical liquid-crystal display

Compounds of formula I their use in liquid-crystalline media, for example, for the phase shifting of microwaves for tunable phased-array antennae, and their use for high-frequency components, in particular antennae, especially for the gigahertz range.

Alkynyl-tolanes, liquid-crystal mixtures containing them and components for high-frequency technology

The present invention relates to methods for the production of enantiopure or enantioenriched Praziquantel precursors and to methods for the production of enantiopure or enantioenriched Praziquantel comprising the methods for the production of the Praziquantel precursors. The present invention further relates to compounds or intermediates useful in such methods.

Method for the production of Praziquantel and precursors thereof

Compounds containing at least one C&#x2014;C triple bond of the formula IR-[A-Z]-AA-[Z-A]-[Z-A]-R&#x2003;&#x2003;I,which have neutral dielectric anisotropy, to the use thereof for high-frequency components, to liquid-crystalline media comprising the compounds, and to high-frequency components, in particular antennae, especially for the giga- and terahertz region, comprising these media. The liquid-crystalline media serve, for example, for the phase shifting of microwaves for tuneable phased-array antennae.

Compounds having a C&#x2014;C triple bond and use thereof in liquid-crystal mixtures

Compounds containing at least one C&#x2014;C triple bond within a chain of at least 3 ring systems which have positive dielectric anisotropy, the use thereof for high-frequency components, liquid-crystalline media containing these compounds, and high-frequency components, in particular antennae, especially for the gigahertz region, containing these media. The liquid-crystalline media serve, for example, for the phase shifting of microwaves for tuneable phased-array antennae.

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Seligenstadt, Germany

Christian Jasper