Depot preparations

A fragrance comprising a depot preparation having at least one compound of the formula (I)

• 3
• wherein
• R1, R2 and R3, independently, are an organic radical having 1 to 30 carbon atoms, and
• wherein the compound of the formula (I) releases an aldehyde and two carboxylic acids following hydrolysis or enzymatic cleavage
• and an extract from natural raw materials, hydrocarbons, aliphatic alcohols, aliphatic ketones, aliphatic nitriles, aliphatic carboxylic acids, acyclic terpene alcohols, acyclic terpene aldehydes, cyclic terpene aldehydes, cyclic alcohols, cycloaliphatic alcohols, cyclic or cycloaliphatic ethers, cyclic ketones, cycloaliphatic aldehydes or ketones, esters of cyclic alcohols or carboxylic acids, aromatic hydrocarbons, araliphatic alcohols, esters of araliphatic alcohols with aliphatic carboxylic acids, aromatic or araliphatic aldehydes, ketones or carboxylic acids, nitrogen-containing, aromatic compounds, phenols, phenyl ethers or phenyl esters, heterocyclic compounds or lactones.

A perfume oil comprising a depot preparation having at least one compound of the formula (I)

• 4
• wherein
• R1, R2 and R3, independently, are an organic radical having 1 to 30 carbon atoms, and
• wherein the compound of the formula (I) releases an aldehyde and two carboxylic acids following hydrolysis or enzymatic cleavage
• and an extract from natural raw materials, hydrocarbons, aliphatic alcohols, aliphatic ketones, aliphatic nitrites, aliphatic carboxylic acids, acyclic terpene alcohols, acyclic terpene aldehydes, cyclic terpene aldehydes, cyclic alcohols, cycloaliphatic alcohols, cyclic or cycloaliphatic ethers, cyclic ketones, cycloaliphatic aldehydes or ketones, esters of cyclic alcohols or carboxylic acids, aromatic hydrocarbons, araliphatic alcohols, esters of araliphatic alcohols with aliphatic carboxylic acids, aromatic or araliphatic aldehydes, ketones or carboxylic acids, nitrogen-containing, aromatic compounds, phenols, phenyl ethers or phenyl esters, heterocyclic compounds or lactones.

A cosmetic care product comprising a depot preparation having at least one compound of the formula (I)

• 5
• wherein
• R1, R2 and R3, independently, are an organic radical having 1 to 30 carbon atoms, and
• wherein the compound of the formula (I) releases an aldehyde and two carboxylic acids following hydrolysis or enzymatic cleavage.

A food product comprising a depot preparation having at least one compound of the formula (I)

• 6
• wherein
• R1, R2 and R3, independently, are an organic radical having 1 to 30 carbon atoms, and
• wherein the compound of the formula (I) releases an aldehyde and two carboxylic acids following hydrolysis or enzymatic cleavage.

A packaging product comprising a depot preparation having at least one compound of the formula (I)

• 7
• wherein
• R1, R2 and R3, independently, are an organic radical having 1 to 30 carbon atoms, and
• wherein the compound of the formula (I) releases an aldehyde and two carboxylic acids following hydrolysis or enzymatic cleavage.

A process for the preparation of compounds of the formula (I)

• 8
• wherein
• R1, R2 and R3, independently, are an organic radical having 1 to 30 carbon atoms, and
• wherein the compound of the formula (I) releases an aldehyde and two carboxylic acids following hydrolysis or enzymatic cleavage
• comprising the step of reacting an aldehyde with a carboxylic anhydride if R2=R3 in the presence of a catalytic amount of an acid.

A process for the preparation of compounds of the formula (I)

• 9
• wherein
• R1, R2 and R3, independently, are an organic radical having 1 to 30 carbon atoms, and
• wherein the compound of the formula (I) releases an aldehyde and two carboxylic acids following hydrolysis or enzymatic cleavage
• comprising the step of reacting an aldehyde with a 1:1 mixture of two carboxylic anhydrides, if R2≠R3, in the presence of a catalytic amount of an acid.