Abstract: The present invention primarily relates to a process for producing alkylpyrazines, the process comprising thermal treatment of an amino acid source in a high boiling solvent, the amino acid source containing at least threonine and/or serine and the thermal treatment yielding alkylpyrazines; and separation of the alkylpyrazines from the high boiling solvent.

Abstract: The present invention relates to a method for oxidizing beta-caryophyllene with oxygen, in particular atmospheric oxygen, which avoids the use of catalysts, enzymes and solvents. Furthermore, the present invention provides a mixture comprising certain caryophyllene oxides as well as their use as a flavor and/or fragrance. The present invention also relates to products and semi-finished products comprising the mixture according to the invention.

Abstract: The present invention relates to, according to a primary aspect, a method for manufacturing a mixture comprising rotundone. A further aspect of the present invention relates to mixtures containing rotundone as well as their use for generating, imparting or modifying, preferably enhancing, one or several taste and/or olfactory impressions. Moreover, the invention relates to a pharmaceutical preparation for nutrition, for oral care or for pleasure or a cosmetic pharmaceutical preparation or a pharmaceutical preparation intended for oral consumption or an intermediate good for manufacturing a pharmaceutical preparation for nutrition, for oral care or for pleasure or a cosmetic pharmaceutical preparation or a pharmaceutical preparation intended for oral consumption comprising a mixture according to the invention and furthermore to a method for manufacturing said preparation or intermediate good.

Abstract: The present invention relates to, according to a primary aspect, a method for manufacturing a mixture comprising rotundone. A further aspect of the present invention relates to mixtures containing rotundone as well as their use for generating, imparting or modifying, preferably enhancing, one or several taste and/or olfactory impressions. Moreover, the invention relates to a pharmaceutical preparation for nutrition, for oral care or for pleasure or a cosmetic pharmaceutical preparation or a pharmaceutical preparation intended for oral consumption or an intermediate good for manufacturing a pharmaceutical preparation for nutrition, for oral care or for pleasure or a cosmetic pharmaceutical preparation or a pharmaceutical preparation intended for oral consumption comprising a mixture according to the invention and furthermore to a method for manufacturing said preparation or intermediate good.

Abstract: The present invention relates in particular to a mixture comprising or at least essentially consisting of compound of formula (Ia) and (beta,beta-(4aR,5R,7aS,9R)-octahydro-2,2,5,8,8,9a-hexamethyl-4H-4a,9-methanoazuleno(5,6-d)-1,3-dioxole) of the formula (Ib), wherein the weight ratio of the compound of the formula (Ia) to the compound of the formula (Ib) in the mixture is in the range from 90:10 to 99:1. The present invention further relates to a method for producing such a mixture, to new odorant and/or aroma substance compositions, and to the use of a mixture of the invention (a) for masking or diminishing the one or more unpleasant olfactory impressions of one or more unpleasantly smelling substances, and/or (b) for intensifying the one or more pleasant olfactory impressions of one or more pleasantly smelling substances.

Abstract: A method is described for producing a compound having the formula (I) or an admixture comprising a compound having the formula (I), having the following steps: dissolving an indanone having the formula (II) in a solvent or in an admixture which contains a solvent, the solvent being selected from the group of solvents which form an azeotrope with water, converting the indanone having the formula (II) with an aromatic aldehyde having the formula (III) in the presence of at least one organic base, according to the drawing: where R1 and R2 independently of each other signify hydrogen or a branched or unbranched alkyl group having from 1 to 12 carbon atoms and where R3, R4, R5, R6, R7, R8, R9, R10 and R11 independently of each other signify hydrogen, hydroxy or a branched or unbranched alkyl or alkoxy group having from 1 to 12 carbon atoms and removing water formed from the reaction admixture during the conversion.

Abstract: The present invention relates in particular to a mixture comprising or at least essentially consisting of compound of formula (Ia) and (beta,beta-(4aR,5R,7aS,9R)-octahydro-2,2,5,8,8,9a-hexamethyl-4H-4a,9-methanoazuleno(5,6-d)-1,3-dioxole) of the formula (Ib), wherein the weight ratio of the compound of the formula (Ia) to the compound of the formula (Ib) in the mixture is in the range from 90:10 to 99:1. The present invention further relates to a method for producing such a mixture, to new odorant and/or aroma substance compositions, and to the use of a mixture of the invention (a) for masking or diminishing the one or more unpleasant olfactory impressions of one or more unpleasantly smelling substances, and/or (b) for intensifying the one or more pleasant olfactory impressions of one or more pleasantly smelling substances.

Abstract: A method is described for producing a compound having the formula (I) or an admixture comprising a compound having the formula (I), having the following steps: dissolving an indanone having the formula (II) in a solvent or in an admixture which contains a solvent, the solvent being selected from the group of solvents which form an azeotrope with water, converting the indanone having the formula (II) with an aromatic aldehyde having the formula (III) in the presence of at least one organic base, according to the drawing: where R1 and R2 independently of each other signify hydrogen or a branched or unbranched alkyl group having from 1 to 12 carbon atoms and where R3, R4, R5, R6, R7, R8, R9, R10 and R11 independently of each other signify hydrogen, hydroxy or a branched or unbranched alkyl or alkoxy group having from 1 to 12 carbon atoms and removing water formed from the reaction admixture during the conversion.

Abstract: Process for esterification of farnesol in an initial mixture comprising alpha-bisabolol, farnesol and optionally other components, with the following steps: 1. Preparation or production of the initial mixture, 2.

Abstract: Process for esterification of farnesol in an initial mixture comprising alpha-bisabolol, farnesol and optionally other components, with the following steps: 1. Preparation or production of the initial mixture, 2.

Abstract: The sensory properties of the diastereomeric enantiomer pairs and of the pure enantiomers of the compound 2-methyl-4-phenyl-1,3-dioxolane are described. The cis compounds (2R,4S)-2-methyl-4-phenyl-1,3-dioxolane and (2S,4R)-2-methyl-4-phenyl-1,3-dioxolane are the most sensorially valuable. These enantiomers and mixtures thereof are particularly suitable for use as a sensorially active substance, for example as a fragrance.

Abstract: A process for the preparation of 1-(2,2,6-trimethylcyclohexyl)-hexan-3-ol of the formula A having a content of at least 30 wt. % of the corresponding trans isomer, based on the total amount of 1-(2,2,6-trimethylcyclohexyl)-hexan-3-ol of the formula A, with the following step: Catalytic hydrogenation of a compound of the formula D ?in which the broken lines represent a single double bond which is located in one of the three positions drawn in, in the presence of a rhodium catalyst to give 1-(2,2,6-trimethylcyclohexyl)-hexan-3-ol of the formula A.

Abstract: The sensory properties of the diastereomeric enantiomer pairs and of the pure enantiomers of the compound 2-methyl-4-phenyl-1,3-dioxolane are described. The cis compounds (2 S,4 R)-2-methyl-4-phenyl-1,3-dioxolane and (2 S,4 R)-2-methyl-4-phenyl-1,3-dioxolane are the most sensorially valuable. These enantiomers and mixtures thereof are particularly suitable for use as a sensorially active substance, for example as a fragrance.

Abstract: A method is described for the preparation of a trimethylcyclohexyl-alkan-3-ol containing a proportion of trans isomer of Formula D where R=H, Me, Et, n-propyl, iso-propyl, n-butyl, iso-butyl or tert-butyl and R1=Me, Et, n-propyl, iso-propyl, n-butyl, iso-butyl or tert-butyl, or of a mixture of several such trimethylcyclohexyl-alkan-3-ols, wherein the method comprises catalytically hydrogenating corresponding compound(s) of Formula B in which R and R1 in each case have the indicated meanings, in the presence of a nickel catalyst, preferably of Raney nickel, and in an absence of catalytically active amounts of copper chromite.

Abstract: Cyclic isolongifolenyl ethers of the general formula A, where wavy lines mean &agr;- and &bgr;-configuration, and R is the following radicals. R=Me, Et, Pr, iso-Pr, Bu, sec-Bu, iso-Bu, tert-Bu. These isolongifolenyl ethers are excellent fragrances and can, in particular, be used as a constituent of fragrance mixtures or perfume oil for the perfuming of cosmetic or technical consumer goods. Also described are processes for the preparation of said cyclic isolongifolenyl ethers.

Abstract: A method is described for the preparation of a trimethylcyclohexyl-alkan-3-ol containing a proportion of trans isomer of Formula D 1

Abstract: The sensory properties of the diastereomeric enantiomer pairs and of the pure enantiomers of the compound 2-methyl-4-phenyl-1,3-dioxolane are described. The cis compounds (2R,4S)-2-methyl-4-phenyl-1,3-dioxolane and (2S,4R)-2-methyl-4-phenyl-1,3-dioxolane are the most sensorially valuable. These enantiomers and mixtures thereof are particularly suitable for use as a sensorially active substance, for example as a fragrance.

Abstract: Cyclic isolongifolenyl ethers of the general formula A, where wavy lines mean &agr;- and &bgr;-configuration, and R is the following radicals.

Abstract: Cyclic isolongifolenyl ethers of the general formula A, where wavy lines mean &agr;- and &bgr;-configuration, and R is the following radicals.

Abstract: The sensory properties of the diastereomeric enantiomer pairs and of the pure enantiomers of the compound 2-methyl-4-phenyl-1,3-dioxolane are described. The cis compounds (2 S,4 R)-2-methyl-4-phenyl-1,3-dioxolane and (2 S,4 R)-2-methyl-4-phenyl-1,3-dioxolane are the most sensorially valuable. These enantiomers and mixtures thereof are particularly suitable for use as a sensorially active substance, for example as a fragrance.