The present invention relates to a method for preparing a dialkyi or dialkenyl ether of a cycloaliphatic or araliphatic diol, which comprises (i) reacting the cycloaliphatic or araliphatic diol with metallic sodium in an aprotic organic solvent in the presence of a catalytic amount of at least one monoether-monoalcohol of formula (I) wherein Y is identical or different and selected from C.sub.2-C.sub.4-alkylene, n is an integer in the range from 1 to 10, and R.sup.1 is C.sub.1-C.sub.4-Alkyl, whereby the corresponding disodium dialcoholate is obtained, reacting the disodium dialcoholate obtained in step (i) with an alkylation alkenylation reagent.

The present invention relates to a method for preparing a dialkyi or dialkenyl ether of a cycloaliphatic or araliphatic diol, which comprises (i) reacting the cycloaliphatic or araliphatic diol with metallic sodium in an aprotic organic solvent in the presence of a catalytic amount of at least one monoether-monoalcohol of formula (I) wherein Y is identical or different and selected from C.sub.2-C.sub.4-alkylene, n is an integer in the range from 1 to 10, and R.sup.1 is C.sub.1-C.sub.4-Alkyl, whereby the corresponding disodium dialcoholate is obtained, reacting the disodium dialcoholate obtained in step (i) with an alkylation alkenylation reagent.

Disclosed are compositions for attracting insects (e.g., harmful or troublesome insects such as blood-sucking and biting insects, ticks and mites) to an object (e.g., insect trap) or area (e.g., field, orchard). Also disclosed are methods for attracting insects involving treating (or exposing) the object or area with a composition containing compounds described herein (e.g., a pro-fragrance compound selected from the group consisting of an acetal, a ketal, hemiacetal and mixtures thereof, wherein at least one of a parent aldehyde, ketone, or alcohol of the pro-fragrance acetal or ketal is a fragrance compound), and optionally a carrier or carrier material.

Disclosed are compositions for attracting insects (e.g., harmful or troublesome insects such as blood-sucking and biting insects, ticks and mites) to an object (e.g., insect trap) or area (e.g., field, orchard). Also disclosed are methods for attracting insects involving treating (or exposing) the object or area with a composition containing compounds described herein (e.g., a pro-fragrance compound selected from the group consisting of an acetal, a ketal, hemiacetal and mixtures thereof, wherein at least one of a parent aldehyde, ketone, or alcohol of the pro-fragrance acetal or ketal is a fragrance compound), and optionally a carrier or carrier material.

The present invention relates to novel compounds and their use as fragrance materials.

The present invention relates to the use of a compound of the general formula (I) wherein R.sup.1 is C.sub.1-C.sub.4-alkyl or (C=0)R.sup.3, R.sup.2 is hydrogen, C.sub.1-C.sub.4-alkyl or (C=0)R.sup.4, and R.sup.3 and R.sup.4, independently of one another, are selected from the group consisting of hydrogen and C.sub.1-C.sub.4-alkyl, a stereoisomer thereof or a mixture of stereoisomers thereof, as an aroma chemical, to aroma chemical compositions comprising at least one compound of the general formula (I), a stereoisomer thereof or a mixture of stereoisomers thereof, and to a method for preparing a fragranced ready-to-use composition, which comprises incorporating at least one compound of the general formula (I), a stereoisomer thereof or a mixture of stereoisomers thereof, into a ready-to-use composition. The present invention further relates to specific ethers and specific esters of the compounds of the general formula (I) and a method for their preparation.

##STR00001##

The present invention relates to the use of a compound of the general formula (I) wherein R.sup.1 is C.sub.1-C.sub.4-alkyl or (C=0)R.sup.3, R.sup.2 is hydrogen, C.sub.1-C.sub.4-alkyl or (C=0)R.sup.4, and R.sup.3 and R.sup.4, independently of one another, are selected from the group consisting of hydrogen and C.sub.1-C.sub.4-alkyl, a stereoisomer thereof or a mixture of stereoisomers thereof, as an aroma chemical, to aroma chemical compositions comprising at least one compound of the general formula (I), a stereoisomer thereof or a mixture of stereoisomers thereof, and to a method for preparing a fragranced ready-to-use composition, which comprises incorporating at least one compound of the general formula (I), a stereoisomer thereof or a mixture of stereoisomers thereof, into a ready-to-use composition. The present invention further relates to specific ethers and specific esters of the compounds of the general formula (I) and a method for their preparation.

##STR00001##

The present invention relates to the use of a compound of the general formula (I) wherein R.sup.1 is C.sub.1-C.sub.4-alkyl or (C=0)R.sup.3, R.sup.2 is hydrogen, C.sub.1-C.sub.4-alkyl or (C=0)R.sup.4, and R.sup.3 and R.sup.4, independently of one another, are selected from the group consisting of hydrogen and C.sub.1-C.sub.4-alkyl, a stereoisomer thereof or a mixture of stereoisomers thereof, as an aroma chemical, to aroma chemical compositions comprising at least one compound of the general formula (I), a stereoisomer thereof or a mixture of stereoisomers thereof, and to a method for preparing a fragranced ready-to-use composition, which comprises incorporating at least one compound of the general formula (I), a stereoisomer thereof or a mixture of stereoisomers thereof, into a ready-to-use composition. The present invention further relates to specific ethers and specific esters of the compounds of the general formula (I) and a method for their preparation.

##STR00001##

The invention discloses a process for hydrogenation (alkenes, carbonyl compounds and aromatics) and hydrodeoxygenation (methoxy phenols) of organic molecules using hydrous ruthenium oxide (HRO) and its supported form as a recyclable heterogeneous catalyst in aqueous medium with good yield of desired products (70-100%) under mild reaction conditions.

The invention discloses a process for hydrogenation (alkenes, carbonyl compounds and aromatics) and hydrodeoxygenation (methoxy phenols) of organic molecules using hydrous ruthenium oxide (HRO) and its supported form as a recyclable heterogeneous catalyst in aqueous medium with good yield of desired products (70-100%) under mild reaction conditions.