Merck Patent Gesellschaft MIT Beschrankter Haftung

Merck Patent Gmbh

Merck Patent Gesellschaft MIT Beschraenkter Haftung

Merck Patent Gesellschaft MIT

Merck Patent Gesellschaft MIT Beschr&auml;nkter Haftung

Merck Gmbh

Ulrich Heywang

Michael Schwarz

Ingeborg Stein

Roland Martin

Michael Casutt

Inge Stein

Thekla Kurz

Michael Kompter

Eike Poetsch

Peer Kirsch

Detlef Pauluth

Michael Heckmeier

Elvira Montenegro

Atsutaka Manabe

Volker Meyer

Frank Pfl&uuml;cker

Henning Bottcher

Gerd Bauer

Jurgen Seubert

Hartmut Hartner

Heinrich Bollinger

Harry Schwartz

Ulrich Fechtel

Ralf Emmert

Hans-Rudolf Muller

Bernd Muller

Gerhard Cimbollek

Alexandra Schneider

J&uuml;rgen Eckstein

Gerald Faller

Gunther Holzemann

Alexander Putz

J Urgen Eckstein

Rainer Christ

The invention relates to a photostable liquid-crystalline medium comprising  

Photostable liquid-crystalline medium

The invention relates to a photostable liquid-crystalline medium comprising  and to the use thereof for electro-optical purposes, and to displays containing this medium.

Photostable liquid crystalline medium

Process for the preparation of UV filter substances

2-phenyl-benzimidazolesulfonic acids as UV-B filters

The invention relates to ketotricyclo&lsqb;5.2.1.0&rsqb;-decane derivatives of the formula I

Ketotricyclo&lsqb;5.2.1.0&rsqb;decane derivatives

Method for debenzylation of dibenzylbiotin

The invention relates to the use of .alpha.-hydroxyketoalkyl derivatives as light protection filters for cosmetic or pharmaceutical products, the .alpha.-hydroxyketoalkyl group being linked, if appropriate via a spacer, to a chromophoric group which has an absorption maximum in a wavelength range of between 280 and 400 nm and has a conjugated .pi.-electron system of at least 8 .pi.-electrons, and to new .alpha.-hydroxyalkyl derivatives, processes for their preparation and pharmaceutical and cosmetic formulations comprising these derivatives as light protection substances.

.alpha.-hydroxyketoalkyl derivatives as light protection filters

Process for the preparation of cinnamic acid derivatives

The use of a benzylidenenorcamphor compound of the formula I ##STR1## wherein Phe is a phenyl group which is unsubstituted or substituted by 1 to 5 hydroxyl, alkyl or alkoxy groups having 1 to 10 C atoms, and n is 1 or 2. as sunscreen filters, and also novel compounds of the formula I, their preparation and use as UV filters, in particular in cosmetic or pharmaceutical preparations.

Benzylidenenorcamphor derivatives

A light-stable cosmetic composition for protection from UV rays having a wavelength of between 280 and 400 nm, which contains at least one tetraalkylquercetin in a cosmetically acceptable oil-based medium, and new tetraalkylquercetins.

Light-stable cosmetic composition

The invention relates to an improved process for the preparation of thioglycolic acid alkyl esters by heating a reaction mixture which essentially comprises thioglycolic acid, an alcohol and an acid catalyst, the water formed being removed by distillation using a water separator, in which the resulting product mixture is passed over a basic ion exchanger, if appropriate after removal of the acid catalyst.

Process for the preparation of thioglycolic acid alkyl esters

The invention relates to ketotricyclo�5.2.1.0!decane derivatives of the formula I ##STR1## wherein Phe is a phenylene group which is unsubstituted or substituted by 1 to 4 hydroxyl, alkyl or alkoxy groups having 1 to 10 C atoms, and their preparation and use as UV filters, in particular in cosmetic or pharmaceutical preparations.

Ketotricyclo �.5.2.1.0! decane derivatives

The invention relates to bis(methylidene)phenylene derivatives of the formula

Bis(methylidene)phenylene derivatives

A process for preparing substituted 4-methylidenecinnamic acid derivatives of Formula (I). ##STR1## The variables are defined herein. The compounds of Formula (I) can be used, for example, as UV absorbers.

Process for preparing substituted 4-methylidenecinnamic acid derivatives

The invention relates to ketotricyclo[5.2.1.0]decane derivatives of the formula I ##STR1## wherein Phe is a phenyl group which is unsubstituted or substituted by 1 to 5 hydroxyl, alkyl or alkoxy groups having 1 to 10 C atoms,

Ketotricyclo[5.2.1.0]decane derivatives

Growing community of inventors

Darmstadt, Germany

Ulrich Heywang