Merck Patent Gesellschaft MIT Beschrankter Haftung

Merck Patent Gmbh

Merck Patent Gesellschaft MIT Beschraenkter Haftung

Merck Patent Gesellschaft

Merck Patent Gesellschaft MIT

Merck Patent Gesellschaft MIT Beschr&auml;nkter Haftung

Merck Gmbh

Michael Schwarz

Ulrich Heywang

Michael Casutt

Ingeborg Stein

Kazuaki Tarumi

Inge Stein

Eike Poetsch

Brigitte Schuler

Roland Martin

Michael Kompter

Hideo Ichinose

Volker Meyer

Hiroshi Numata

Thekla Kurz

Akiko Takashima

Frank Pfl&uuml;cker

Yasuyoshi Namiki

Jurgen Eckstein

Juergen Eckstein

Volker Reiffenrath

Marcus Reuter

Werner Binder

Frank Pfluecker

Joeran Stoldt

Arnulf Heubner

Ulrich Koop

Holger Krummradt

Hans Neunhoeffer

Thomas Koppe

Bernd Reckmann

Peter Mackert

Stefan Zehner

J Urgen Eckstein

Wolfgang Melichar

Jürgen Eckstein

Stephan Gürtler

J&uuml;rgen Eckstein

Volker Scholz

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

The invention relates to the use of quinoxaline derivatives of formula I, represented by formulas 1and 1, as photostable UV filters, in particular in cosmetic and pharmaceutical preparations for protecting the human epidermis or human hair against UV radiation, above all in the 280&#x2013;400 nm range. 

Tricyclic quinoxaline and quinoline derivatives as a UV filter

A novel process for carrying out reactions of carbonyl compounds with organometallic reagents, in particular with Grignard reagents, is described.

Reaction of carbonyl compounds with organometallic reagents

The invention relates to a method for selectively dissociating cyclic carboxylic acid anhydrides. According to the inventive method, a chiral amino alcohol with a tertiary amino group that may have a partially or completely bridged structure is used as the chiral auxiliary reagent.

Method for selectively dissociating cyclic carboxylic acid anhydrides

Process for the preparation of UV filter substances

Liquid crystalline medium

2-phenyl-benzimidazolesulfonic acids as UV-B filters

Liquid-crystalline medium and liquid-crystal display containing same

Liquid-crystalline medium

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

The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it comprises one or more compounds of the formula I ##STR1## and one or more compounds of the formula I.sup.* ##STR2## in which R, Y, L and s are as defined herein.

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

Preparation of a D-(+)-biotin intermediate

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

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

Growing community of inventors

Weiterstadt, Germany

Michael Schwarz