Abstract: An acetal of formula I: is described in which the radicals R1 to R6 independently of one another are eac hydrogen, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl or tert-butyl, n=0 or 1, and there is a single bond or double bond at the location of a broken line between two C atoms, any double bond present in the chain linking the aliphatic ring to the acetal group having the E or Z configuration, with the proviso that the number of double bonds incorporating a C atom of the aliphatic ring is 0 or 1, and the number of double bonds not incorporating a C atom of the aliphatic ring is 0 or 1.

Abstract: 3-Methylbenzyl isobutyrate is described, as is the use thereof as an odoriferous substance, in particular for imparting a green fruity head note to an odoriferous substance mixture.

Abstract: Novel indanylidene compounds can be used as UV-A filters in cosmetic compositions for protecting skin and hair and for technical applications.

Abstract: 4,8-dimethyl-3,7-nonadien-2-one has aromatizing properties and increases the extendibility and intensity of the aroma when used in an aroma composition.

Abstract: An acetal of formula I: is described in which the radicals R1 to R6 independently of one another are each hydrogen, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl or tert-butyl, n=0 or 1, and there is a single bond or double bond at the location of a broken line between two C atoms, any double bond present in the chain linking the aliphatic ring to the acetal group having the E or Z configuration, with the proviso that the number of double bonds incorporating a C atom of the aliphatic ring is 0 or 1, and the number of double bonds not incorporating a C atom of the aliphatic ring is 0 or 1.

Abstract: The invention relates to aromas and aroma compositions, which contain 4,8-dimethyl-3,7-nonadien-2-one and which can be used in foodstuffs and luxury foods or in preparations used for oral hygiene.

Abstract: Novel indanylidene compounds can be used as UV-A filters in cosmetic compositions for protecting skin and hair and for technical applications.

Abstract: Perfume compositions, which comprise 4,8-dimethyl-3,7-nonadien-2-one can be used in fine perfumery and for the perfuming of industrial products.

Abstract: 2,4,4,7-Tetramethyl-oct-6-en-3-one, as a perfume component, imparts new smell facets to perfume compositions. It can be prepared in a good yield by prenylation of 1-chloro-3-methyl-2-butene in a 2-phase process.

Abstract: The invention relates to N-substituted benzazoles, processes for their preparation and their use as UV absorbers.

Abstract: The invention relates to N-substituted benzazoles, processes for their preparation and their use as UV absorbers.

Abstract: Open-chain branched olefinically unsaturated alcohols and esters are excellent aroma substances.

Abstract: In the preparation of substituted 2-cyanocinnamic esters by the Knoevenagel condensation of cyanoacetic esters and carbonyl compounds, the reaction times for obtaining high yields can be considerably reduced by using C.sub.3 -C.sub.6 -monocarboxylic acids and ammonium compounds as catalysts.