Abstract: The present invention relates to a process for producing 3-methylcyclopentadecane-1,5-dione of formula (I), which comprises the oxidation of 14-methyl-bicyclo[10.3.0]pentadecen[1 (12)] of formula (II) with an oxidizing agent, where the oxidation is performed by using a mixture of formic acid with H2O2 as sole oxidizing agent in the presence of water and where the amount of H2O2 is at least 1.1 mol H2O2 per mol of the compound of formula (II).

Abstract: The present invention relates to novel compounds of general formulae (la), (lb) and (Ic) and to the stereoisomers thereof. The compounds are useful as a fragrance or as flavor as they have a sandalwood like scent. The invention also relates to a method for imparting or modifying a scent or a flavor to a composition by including said compounds into such composition, to a fragrance containing composition and/or a fragrance material containing said compound and to a process for preparing these compounds. X is C(R4)—OH or C?O; R1 is selected from the group consisting of hydrogen, C1-C4-alkyl, C2-C4-alkenyl and C3-C4-cycloalkyl, R2 is selected from the group consisting of hydrogen, C1-C4-alkyl, C2-C4-alkenyl and C3-C4-cycloalkyl, R3 is C1-C4-alkyl, R3a is selected from the group consisting of hydrogen and C1-C4-alkyl, R3b is hydrogen or together with R3a is CH2; R4 is selected from the group consisting of hydrogen and C1-C4-alkyl.

Abstract: The invention relates to a method for producing 2-substituted 4-methyl-tetrahydropyrans of general formula (I) from starting materials containing at least one 2-substituted 4,4-dimethyl-1,3-dioxane of general formula (II).

Abstract: The present invention relates to a process for preparing a macrocyclic diketone compound of the formula (I), which comprises the oxidation of a bicycloolefine compound of the formula (II) with an oxidizing agent, formulae (I) (II) where in formulae (I) and (II) A is (CH2)n with n being an integer from 2 to 12, where two hydrogen atoms may be replaced by C1-C4-alkyl, in particular methyl, or two hydrogen atoms, which are bound to adjacent carbon atoms may be replaced by a fused 5- or 6-membered saturated carbocycle; B is (CH2)m with m being 1 or 2, where 1 or 2 hydrogen atoms may be replaced by C1-C4-alkyl, in particular methyl.

Abstract: The present invention relates to 1-(7,10,10-trimethyl-4-bicyclo[6.2.0]decanyl)ethanone, the use of 1-(7,10,10-trimethyl-4-bicyclo[6.2.0]decanyl)ethanone as a fragrance or as flavor, to a method for imparting or modifying a scent or a flavor to a composition by including said compound into such composition, to a fragrance containing composition and/or a fragrance material containing said compound and to a process for preparing 1-(7,10,10-trimethyl-4-bicyclo[6.2.0]decanyl)ethanone.

Abstract: The present invention relates to a process for the preparation of 1-(2,6,6-trimethylcyclohexylyalkan-3-ols, in particular 1-(2,6,6-trimethylcyclohexyl)-hexan-3-ol. The invention further relates to 5-alkoxy-1-(2,6,6-trimethylcyclohexenyl)-1-alken-3-ones and the use of these as a fragrance or as flavor, to a fragrance containing composition and/or a fragranced product containing 5-alkoxy-1-(2,6,6-trimethylcyclohexenyl)-1-alken-3-ones and to a method for imparting or modifying a scent or a flavor to a composition by including said alkoxyalkenones into such composition.

Abstract: The present invention relates to a method for preparing tetrahydropyranyl esters from the corresponding 4-hydroxytetrahydropyran compounds by reaction with a ketene compound.

Abstract: The present invention relates to 1-(7,10,10-trimethyl-4-bicyclo[6.2.0]decanyl)ethanone, the use of 1-(7,10,10-trimethyl-4-bicyclo[6.2.0]decanyl)ethanone as a fragrance or as flavor, to a method for imparting or modifying a scent or a flavor to a composition by including said compound into such composition, to a fragrance containing composition and/or a fragrance material containing said compound and to a process for preparing 1-(7,10,10-trimethyl-4-bicyclo[6.2.0]decanyl)ethanone.

Abstract: The present invention relates to a process for reacting isopulegol to menthone in the gas phase and to the use of the reaction products thus prepared as additives in foods, cosmetics, pharmaceutical products, tobacco formulations, household products, and laundry care products.

Abstract: The present invention relates to a process for the preparation of 1-(2,6,6-trimethylcyclohexylyalkan-3-ols, in particular 1-(2,6,6-trimethylcyclohexyl)-hexan-3-ol. The invention further relates to 5-alkoxy-1-(2,6,6-trimethylcyclohexenyl)-1-alken-3-ones and the use of these as a fragrance or as flavor, to a fragrance containing composition and/or a fragranced product containing 5-alkoxy-1-(2,6,6-trimethylcyclohexenyl)-1-alken-3-ones and to a method for imparting or modifying a scent or a flavor to a composition by including said alkoxyalkenones into such composition.

Abstract: The present invention relates to the use of isomerically pure or highly isomerically enriched cis- or trans-(2-isobutyl-4-methyltetrahydropyran-4-yl) acetate for use as aroma chemicals. The invention further relates to a process for the preparation of isomerically pure or highly isomerically enriched cis- or trans-(2-isobutyl-4-methyltetrahydropyran-4-yl) acetate and the products obtainable by this process. The invention further relates to a fragrance or aroma substance composition which comprises isomerically pure or highly isomerically enriched cis- or trans-(2-isobutyl-4-methyltetra-hydropyran-4-yl) acetate, a method for imparting, and/or boosting an odor or taste of a product, and also perfumed or aromatized products which comprise isomerically pure or highly isomerically enriched cis- or trans-(2-isobutyl-4-methyltetrahydropyran-4-yl) acetate.

Abstract: A method of preparing a compound of formula (IV) where R1 is alkyl of 1 to 4 carbon atoms, comprises reacting cyclohexene with hydrogen peroxide and an alcohol R1OH in the presence of a catalyst comprising a zeolite of framework structure MWW, wherein the framework of the zeolite comprises silicon, titanium, boron, oxygen and hydrogen.

Abstract: A method of preparing 2-alkoxycyclohexanol, a mixture comprising 2-alkoxycyclohexanol obtained via said method, and the use of said mixture for preparing 4-hydroxy-3-alkoxy-benzaldehyde.

Abstract: The present invention relates to a process for preparing arylpropenes, especially 1-methoxy-4-(1-propenyl)benzene (anethole), by means of thermolysis of the corresponding 1,1-diarylpropanes.

Abstract: The present invention relates to processes for the preparation of compounds of the formula (Ia) by reacting styrene with a secondary alkanol and the hydrogenation of the resulting phenyl-substituted tertiary alkanol. In addition, the invention relates to compounds of the formula (Ia) and to the use of such compounds as fragrances, and also to compositions which comprise compounds of the formulae (Ia) and (Ib).

Abstract: The present invention relates to a process for reacting isopulegol to menthone in the gas phase and to the use of the reaction products thus prepared as additives in foods, cosmetics, pharmaceutical products, tobacco formulations, household products, and laundry care products.

Abstract: The invention relates to a method for producing 2-substituted 4-methyltetrahydropyrans of general formula (I) from starting materials containing at least one 2-substituted 4,4-dimethyl-1,3-dioxane of general formula (II).

Abstract: The present invention relates to a method for preparing 2-substituted 4-hydroxy-4-methyltetrahydropyrans from starting materials comprising at least one 2-alkyl-4,4-dimethyl-1,3-dioxane.

Abstract: The present invention relates to a process for preparing arylpropenes, especially 1-methoxy-4-(1-propenyl)benzene (anethole), by means of thermolysis of the corresponding 1,1-diarylpropanes.

Abstract: A process for preparing 4-cyclohexyl-2-methyl-2-butanol, comprising: a) reaction of styrene with isopropanol at elevated temperature to obtain 2-methyl-4-phenyl-2-butanol, and b) heterogeneously catalyzed hydrogenation of 2-methyl-4-phenyl-2-butanol over a catalyst suitable for ring hydrogenation of aromatics, where the molar ratio of the styrene used in step a) to the isopropanol used in step a) is in the range from 1:below 5 to 1:0.5.