Abstract: The invention relates to a photostable liquid-crystalline medium comprising at least one compound of the formula I ?and at least one compound of the formula II ?and to the use thereof for electro-optical purposes, and to displays containing this medium.

Abstract: The invention relates to a photostable liquid-crystalline medium comprising at least one compound of the formula I and at least one compound of the formula II and to the use thereof for electro-optical purposes, and to displays containing this medium.

Abstract: The invention relates to a photostable liquid-crystalline medium comprising at least one compound of the formula I and at least one compound of the formula II and to the use thereof for electro-optical purposes, and to displays containing this medium.

Abstract: The invention relates to a photostable liquid-crystalline medium comprising at least one compound of the formula I and at least one compound of the formula II and to the use thereof for electro-optical purposes, and to displays containing this medium.

Abstract: The invention relates to a novel method for preparing biotine while using 5-hydroxy-2(5H)-furanone as a starting substance. The invention also relates to a method in which 1-chlorosulfonyl-1,2,2a,3,5,5a-hexa-hydro-3-((1R)-menthyloxy-)-furo[3,4-b]azet-2-one is formed as an intermediate product.

Abstract: The present invention relates to a preparation process for 2-arylbenzimidazolesulfonic acids of the formula I: Ar is a substituted or unsubstituted phenyl or naphthyl radical and R is a C1-8-alkyl or C1-8-alkoxy radical. n is 1-4, m is 1-3 and o is 0-2. o-phenylenediamine is reacted in the presence of oleum with an arylcarboxylic acid or an arylcarboxylic acid derivative. Compounds prepared in this way can be used as UV filters, and as components in cosmetic compositions.

Abstract: Disclosed is a 2-phenyl-benzimidazolesulfonic acid according to the formula in which n is 0, 1 or 2 and m is 2 or 3, R1, R2, R3, R4 and R5, are each a radical such as H, C1-8-alkyl, C1-8-alkoxy, hydroxyl, sulfate, nitro, F, Cl, Br or I radicals, and R6 is a C1-8-alkyl or C1-8-alkoxy radical. This compound can be effectively used as a UV filter, and as part of a cosmetic formulation which comprise these compounds. A process for preparation of the compound is disclosed as well.

Abstract: Disclosed is a 2-phenyl-benzimidazolesulfonic acid according to the formula 1

Abstract: Disclosed is a 2-phenyl-benzimidazolesulfonic acid according to the formula 1

Abstract: The present invention relates to a preparation process for 2-arylbenzimidazolesulfonic acids of the formula I: 1

Abstract: The invention relates to ketotricyclo[5.2.1.0]-decane derivatives of the formula I 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 their preparation and use as UV filters, in particular in cosmetic or pharmaceutical formulations.

Abstract: The present invention relates to a novel process for the selective debenzylation of dibenzylbiotin, which is formed as an intermediate in the synthesis of biotin, but is usually not isolated.

Abstract: 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.

Abstract: The invention relates to a process for the preparation of cinnamic acid derivatives which involves reacting chlorinated aromatic compounds and acrylic acid derivatives in the presence of palladium catalysts.

Abstract: 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, andn 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to bis(methylidene)phenylene derivatives of the formulaA.sup.1 -Phe-A.sup.2 Iwherein Phe is an unsubstituted or substituted phenylene group, A.sup.1 is a group selected from the formulae 1, 2 and 3 and A.sup.2 is a group other than A.sup.1 selected from the formulae 1, 2 and 3 ##STR1## wherein R.sup.1 and R.sup.2 are independently H or CH.sub.3 and their preparation and use as UV filters, in particular cosmetic and pharmaceutical preparations.

Abstract: 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.