The various aspects presented herein relate to the perfumery industry. More particularly, the various aspects presented herein relate to malodor counteracting compositions and/or ingredients, methods for counteracting malodors, as well as to the perfumed articles or perfuming compositions comprising as an active ingredient, at least one compound selected from the group consisting of: a compound of Formula (I), a compound of Formula (II), a compound of Formula (III), a compound of Formula (IV), and mixtures thereof.

The present invention relates to the field of perfumery. More particularly, it relates to a compound of formula (I) as defined herein below, and its uses as perfuming ingredient, to control arthropods or as antimicrobial ingredient. Therefore, following what is mentioned herein, the present invention comprises the invention compound as part of a perfuming composition or of a perfumed consumer product. Moreover, the present invention relates to a properfume compound suitable to release the compound of formula (I).

Suggested is fragrance composition comprising or consisting of a selection of specific nitriles showing improved stability against decomposition and discoloration.

A fragrance precursor of (E/Z)-9-hydroxy-5,9-dimethyldec-4-enal, comprising at least an enamine and/or an aminal as reaction product of (E/Z)-9-hydroxy-5,9-dimethyldec-4-enal (compound according to formula (I)) and a primary and/or secondary amine

##STR00001##

useful as a perfume ingredient.

A novel odorant of formula (I) wherein each of R.sub.1, R.sub.2, R.sub.3, R.sub.3, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9 and R.sub.10 are independently selected from H, CH.sub.3, and C.sub.2H.sub.5; X is selected from —CH.sub.2OH, —CH.sub.2OCOCH.sub.3 and —CHO, n is selected from 0 and 1. The dotted line represents double bond or single bond. ##STR00001##

A perfume composition includes groups of perfume components that produce enhanced sensory performance. The composition includes components that have synergistic odor properties.

A fragrance precursor of 3-(4-isobutyl-2-methyl phenyl)propanal, comprising at least an enamine and/or an aminal as reaction product of 3-(4-isobutyl-2-methylphenyl)propanal (compound according to formula (I)) and a primary and/or secondary amine

##STR00001##

useful as a perfume ingredient.

A fragrance precursor represented by the formula 1

##STR00001##

wherein

X and Y together represent a double bond to a carbon atom bearing R.sub.1 and R.sub.2, with R.sub.1═H, methyl, acetyl or C.sub.1—C.sub.3 alkoxycarbonyl (e.g. ethoxycarbonyl); and R2=phenyl optionally substituted with up to 3 (i.e. 0, 1, 2 or 3) groups selected from C.sub.1—C.sub.4 alkyl (e.g. methyl, ethyl, iso-propyl, tert-butyl), vinyl, hydroxy, C.sub.1—C.sub.3 alkoxy (e.g. ethoxy), and —O—CH.sub.2—O—, e.g. R.sub.2 is benzo[d][1,3]dioxol-5-yl, 4-methylphenyl, 4-methoxyphenyl, 4-vinylphenyl or 3-ethoxy-4-hydroxyphenyl or

R2=naphthyl, (naphthyl) methyl, 1,1,2,4,4,8-hexamethyl-1,2,3,4-tetrahydronaphthalen-7-yl, or 1,1,2,4,4,-penta methyl-1,2,3,4-tetrahydronaphthalen-7-yl or

R2=COR3, wherein R3 is H, C1-C10 alkoxy (e.g. ethoxy, 1-(3,3-dimethylcyclohexyl)ethoxy), C1-C4 alkyl (e.g. methyl, ethyl, propyl, iso-propyl, tert-butyl), e.g. R2 is formyl, acetyl, ethoxycarbonyl, 1-(3,3-dimethylcyclohexyl)ethoxycarbonyl; or wherein

X is OR4, with R4 being H or alkyl, and

Y is OR5, with R5 being alkyl,

useful as a perfume ingredient.

The present application relates to perfume raw materials, perfume delivery systems and consumer products comprising such perfume raw materials and/or such perfume delivery systems, as well as processes for making and using such perfume raw materials, perfume delivery systems and consumer products. Such perfume raw materials and compositions, including the delivery systems, disclosed herein expand the perfume communities' options as such perfume raw materials can provide variations on character and such compositions can provide desired odor profiles.

A malodor reducing composition is provided. The composition includes a perfume mixture including (a) at least one odor-reducing material; and (b) at least one N-heterocycle selected from an aromatic N-heterocyclic moiety and N,S-heterocyclic moiety. The at least one odor-reducing material exhibits an Odor Value (OV) having a common decimal logarithm (log.sub.10OV) of greater than about 5.5.