Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C323/00—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups
  • C07C323/50—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton
  • C07C323/51—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton
  • C07C323/57—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being further substituted by nitrogen atoms, not being part of nitro or nitroso groups
  • C07C323/58—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being further substituted by nitrogen atoms, not being part of nitro or nitroso groups with amino groups bound to the carbon skeleton
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/50—Perfumes
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/35—Ketones, e.g. benzophenone
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
  • A61K8/44—Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof
  • A61K8/447—Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof containing sulfur
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q13/00—Formulations or additives for perfume preparations
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C323/00—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups
  • C07C323/50—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton
  • C07C323/51—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton
  • C07C323/52—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being acyclic and saturated
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C403/00—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone
  • C07C403/14—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone having side-chains substituted by doubly-bound oxygen atoms
  • C07C403/16—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone having side-chains substituted by doubly-bound oxygen atoms not being part of —CHO groups
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
  • C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
  • C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/0005—Other compounding ingredients characterised by their effect
  • C11D3/001—Softening compositions
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/34—Organic compounds containing sulfur
  • C11D3/349—Organic compounds containing sulfur additionally containing nitrogen atoms, e.g. nitro, nitroso, amino, imino, nitrilo, nitrile groups containing compounds or their derivatives or thio urea
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/50—Perfumes
  • C11D3/502—Protected perfumes
  • C11D3/507—Compounds releasing perfumes by thermal or chemical activation
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C2601/00—Systems containing only non-condensed rings
  • C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
  • C07C2601/16—Systems containing only non-condensed rings with a six-membered ring the ring being unsaturated
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
  • C11D2111/10—Objects to be cleaned
  • C11D2111/12—Soft surfaces, e.g. textile

Definitions

• the present invention relates to a particular class of compounds capable of releasing fragrant compounds in a controlled manner into the surroundings.
• the present invention is also concerned with a process for their production, and consumer products comprising them.
• the present invention relates to precursors that release damascone.
• damascone precursor that is, a compound that is itself, basically because of the high molecular weight, essentially odorless, but which, in particular circumstances, will decompose to release damascone at a desired time. It has now been found that the compound of formula (I) as herein below described can act as precursor for the release, by spontaneous air oxidation, of damascone.
• one of the dotted lines represents together with the carbon-carbon bond a double bond and each of the other two dotted lines represent together with the carbon- carbon bond a single bond.
• the compound of formula (I) is a compound wherein the dotted line between C3’ and C4’ represents together with the carbon-carbon bond a double bond (i.e. the compound of formula (I) is ethyl S-(4-oxo-4-(2’,6’,6’- trimethylcyclohex-3’-en-1’-yl)butan-2-yl)cysteinate).
• the activating conditions comprise the presence of molecular oxygen.
• the concentration of oxygen in the air is sufficient for cleaving the compound of formula (I) in such a way, that the cleavage products can be detected in the ambient air, e.g. by olfaction or GC-MS analysis of headspace samples.
• the compounds of formula (I) are very stable when not exposed to the ambient air, i.e. when stored neat or in a diluent conventionally used in conjunction with odorants, such as dipropyleneglycol (DPG), isopropylmyristate (IPM), triethylcitrate (TEC), pentane- 1 ,2-diol, and alcohol (e.g. ethanol), and known odorants.
• DPG dipropyleneglycol
• IPM isopropylmyristate
• TEC triethylcitrate
• pentane- 1 ,2-diol e.g. ethanol
• alcohol e.g. ethanol
• Very good storage stability has been proven also when incorporated in consumer products such as detergent, shampoo and fabric conditioner.
• the compounds of formula (I) may find use in a broad range of consumer products in which a prolonged and defined release of fragrant compounds is desired.
• the compounds of formula (I) are useful in consumer products, such as detergent products, including powder and liquid detergents or detergents in form of tablets, pouches/single unit doses, soap and laundry bars, fabric conditioner, including tumble dryer sheets, and scent boosters (liquid or solid).
• the compounds of formula (I) are useful in cosmetic products, which include (a) cosmetic skincare products, especially bath products, skin washing and cleansing products, skincare products, eye makeup, lip care products, nail care products, intimate care products, foot care products;
• cosmetic products with specific effects especially sunscreens, tanning products, de- pigmenting products, deodorants, antiperspirants, hair removers, and shaving products;
• cosmetic dental-care products especially dental and oral care products, tooth care products, cleaners for dental prostheses, adhesives for dental prostheses;
• cosmetic hair care products especially hair shampoos, hair care products, hair setting products, hair-shaping products, and hair coloring products.
• a consumer product comprising a compound of formula (I) and a product base.
• consumer product base means a composition for use as a consumer product to fulfill specific actions, such as cleaning, softening, and caring or the like.
• examples of such products include fine perfumery, e.g. perfume and eau de toilette; fabric care, household products and personal care products such as cosmetics, laundry care detergents, rinse conditioner, personal cleansing composition, detergent for dishwasher, surface cleaner; laundry products, e.g. softener, bleach, detergent; body- care products, e.g. shampoo, shower gel; air care products (includes products that contain preferably volatile and usually pleasant-smelling compounds which
• Air fresheners for living areas contain, in particular, natural and synthetic essential oils such as pine needle oils, citrus oil, eucalyptus oil, lavender oil, and the like.
• the compounds of formula (I) are especially useful as part of fragrances to be used in laundry products, in which they can release damascone upon usage.
• the odor profile is perceived as fruity berry with a slightly plastic off-note.
• a combination is obtained which results in an odor profile which is essentially free of the undesirable plastic note.
• the compound of formula (III) is a compound wherein the dotted lines represents a double bond located in delta position on each of the cyclohexane rings (i.e. the compound of formula (III) is ethyl A/,S-bis(4-oxo-4-(2’,6’,6’- trimethylcyclohex-3’-en-1’-yl)butan-2-yl)cysteinate))
• the compounds of formula (I), or a mixture of a compound of formula (I) and a compound of formula (III), can be used alone, or in combination with other fragrance ingredients and/or precursors thereof.
• fragrance ingredients are described, for example, in "Perfume and Flavor Chemicals", S. Arctander, Ed., Vol. I & II, Allured Publishing Corporation, Carol Stream, USA, 2003 and include fragrance compounds of natural or synthetic origin and essential oils.
• fragrance ingredients which may be combined with the compounds of formula (I):
• oils and extracts e.g. castoreum, costus root oil, oak moss absolute, geranium oil, tree moss absolute, basil oil, fruit oils, such as bergamot oil and mandarine oil, myrtle oil, palmarose oil, patchouli oil, petitgrain oil, jasmine oil, rose oil, sandalwood oil, wormwood oil, lavender oil and/ or ylang-ylang oil;
• cinnamic alcohol ((£)-3-phenylprop-2-en-1 -ol); cis-3-hexenol (( ⁇ - hex-3-en-1 -ol); citronellol (3,7-dimethyloct-6-en-1 -ol); dihydro myrcenol (2,6- dimethyloct-7-en-2-ol); EbanolTM ((£)-3-methyl-5-(2,2,3-trimethylcyclopent-3-en- 1 -yl)pent-4-en-2-ol); eugenol (4-allyl-2-methoxyphenol); ethyl linalool ((E)- 3,7- dimethylnona-1 ,6-dien-3-ol); farnesol ((2E,6Z)-3,7,1 1 -trimethyldodeca-2,6,10- trien-1 -ol); geraniol ((£)-3-phenylprop-2-
• phenyl ethyl alcohol (2-phenylethanol); RhodinolTM (3,7-dimethyloct-6-en-1 -ol); SandaloreTM (3-methyl-5-(2,2,3-trimethylcyclopent-3-en-1 -yl)pentan-2-ol);
• terpineol (2-(4-methylcyclohex-3-en-1 -yl)propan-2-ol); or TimberolTM (1 -(2,2,6- trimethylcyclohexyl)hexan-3-ol); 2,4,7-trimethylocta-2,6-dien-1 -ol, and/or [1 - methyl-2(5-methylhex-4-en-2-yl)cyclopropyl]-methanol;
• aldehydes and ketones e.g. anisaldehyde (4-methoxybenzaldehyde); alpha amyl cinnamic aldehyde (2-benzylideneheptanal); delta Damascone ((2£)-1 - (2,6,6-trimethylcyclohex-2-en-1 -yl)but-2-en-1 -one); GeorgywoodTM (1 -(1 ,2,8,8- tetramethyl-1 ,2,3,4,5,6,7,8-octahydronaphthalen-2-yl)ethanone);
• Hydroxycitronellal (7-hydroxy-3,7-dimethyloctanal); Iso E Super ® (1 -(2, 3,8,8- tetramethyl-1 ,2,3,4,5,6,7,8-octahydronaphthalen-2-yl)ethanone); Isoraldeine ® ((£)-3-methyl-4-(2,6,6-trimethylcyclohex-2-en-1 -yl)but-3-en-2-one); Hedione ® (methyl 3-oxo-2-pentylcyclopentaneacetate); 3-(4-isobutyl-2- methylphenyl)propanal; maltol; methyl cedryl ketone; methylionone; verbenone; and/or vanillin;
• esters and lactones e.g. benzyl acetate; cedryl acetate ((1 S,6R,8aRy ⁇ ,4,4,6- tetramethyloctahydro-1 /-/-5,8a-methanoazulen-6-yl acetate); g-decalactone (6- pentyltetrahydro-2H-pyran-2-one); Helvetolide ® (2-(1 -(3,3- dimethylcyclohexyl)ethoxy)-2-methylpropyl propionate); g-undecalactone (5- heptyloxolan-2-one); and / or vetiveryl acetate ((4,8-dimethyl-2-propan-2- ylidene-3,3a,4,5,6,8a-hexahydro-1 H-azulen-6-yl) acetate);
• macrocycles e.g. Ambrettolide ((Z)-oxacycloheptadec-10-en-2-one); ethylene brassylate (1 ,4-dioxacycloheptadecane-5,17-dione); and / or Exaltolide ® (16- oxacyclohexadecan-1 -one); and heterocycles, e.g. isobutylquinoline (2-isobutylquinoline).
• Ambrettolide (Z)-oxacycloheptadec-10-en-2-one
• ethylene brassylate (1 ,4-dioxacycloheptadecane-5,17-dione
• Exaltolide ® (16- oxacyclohexadecan-1 -one
• heterocycles e.g. isobutylquinoline (2-isobutylquinoline).
• the compound of formula (I), or the mixture of a compound of formula (I) and a compound of formula (III), may be used in combination with other fragrance precursors, including 1 -butoxy-3-((1 E,4Z)-hepta-1 ,4-dien-1 - yl)benzene, (4-(dodecylthio)-4-methylpentan-2-one, 2-ethoxy-4-((1 £,4Z)-hepta-1 ,4- dien-1 -yl)phenol, and ethyl 2-acetyl-4-methyltridec-2-enoate.
• other fragrance precursors including 1 -butoxy-3-((1 E,4Z)-hepta-1 ,4-dien-1 - yl)benzene, (4-(dodecylthio)-4-methylpentan-2-one, 2-ethoxy-4-((1 £,4Z)-hepta-1 ,4- dien-1 -yl)phenol,
• the amounts in which the compounds of formula (I), or the mixture of a compound of formula (I) and the compound of formula (III), may be incorporated in the various consumer products vary within a wide range. The amounts depend on the nature of the product to which the compounds of formula (I), or the mixture of a compound of formula (I) and the compound of formula (III), are added and the desired olfactory effect. The amounts used also depend on the co-ingredients in a given composition when the compounds of formula (I), or the mixture of a compound of formula (I) and the compound of formula (III), are used in admixture with perfuming co-ingredients, solvents or adjuvants. Typical concentrations are from 0.0001 to 5 weight percent of the article. In one embodiment, compounds of the present invention may be employed in a fabric softener in an amount of from 0.0001 to 2 weight percent. In another
• compounds of the present invention may be employed in a detergent in an amount of from 0.0001 to 4 weight percent.
• compounds of the present invention may be used in fine perfumery in amounts from 0.001 to 10 weight percent (e.g. up to about 5 weight percent), more preferably between 0.02 and 4 weight percent.
• weight percent e.g. up to about 5 weight percent
• the compounds of formula (I) are novel in its own right.
• one of the dotted lines represents together with the carbon-carbon bond a double bond and each of the other two dotted lines represent together with the carbon- carbon bond a single bond.
• the compounds of formula (I) may be prepared by a 1 ,4 addition of cysteine-ethyl ester to damascone in a suitable solvent such as tetrahydrofuran, dimethyl formamide, ethanol or water and in the presence of an organic or inorganic base, such as N- ethyldiisopropylamine, triethylamine, potassium or sodium carbonate or hydroxide.
• a suitable solvent such as tetrahydrofuran, dimethyl formamide, ethanol or water
• an organic or inorganic base such as N- ethyldiisopropylamine, triethylamine, potassium or sodium carbonate or hydroxide.
• an organic or inorganic base such as N- ethyldiisopropylamine, triethylamine, potassium or sodium carbonate or hydroxide.
• Other conditions for the formation of thioethers can be employed which are known to the person skilled in the art of organic synthesis.
• the mixture of a compound of formula (I) and a compound of formula (III) may be either prepared by admixing the two compounds in the desired ratio after each of them was prepared independently of each other.
• the mixture can be prepared in situ, e.g., by following the process as described in the Examples.
• phase was extracted with MTBE (2x 50 ml).
• the org. phases were combined and washed with water (3x 50 ml), water/brine (20 ml/30 ml) and brine (50 ml), dried over MgS0 4 , filtered and the solvent was evaporated to give ethyl S-(4-oxo-4-(2’,6’,6’-trimethylcyclohex-3’-en-T-yl)butan-2-yl)-L-cysteinate (16.91 g, 49.5 mmol, 95% yield) as a mixture of four isomers and as a light yellow oil.
• Odor description dry-down of a 10% DPG solution after 24 hours on a smelling strip: fruity berry, reminiscent of stewed apple, slightly plastic, chemical.
• Example 2 Ethyl S-(4-oxo-4-(2’.6’.6’-trimethylcvclohex-3’-en-1’-vObutan-2-yl) cvsteinate (GR-87-1 182-2) and Ethyl A/.S-bis(4-oxo-4-(2’.6’.6’-trimethylcvclohex-3’-en- 1’-yl)butan-2-yl)cvsteinate)
• Odor description of the obtained mixture (dry-down of a 10% DPG solution after 24 hours on a smelling strip): fruity, damascone like, stewed apple, clean, pleasant
• the activating conditions to release compounds of formula II comprise a combination of change of pH, elevated temperature and exposure to air.
• the combination of trigger conditions has the advantage of continuous release of odoriferous compounds of formula II from an early stage (e.g. on wet fabric in detergent application) to several days.
• Example 3 Ethyl A/-(4-oxo-4-(2,6,6-trimethylcvclohex-3-en-1 -yl)but-2-en-2-yl)-S- (4-oxo-4-(2,6,6-trimethylcvclohex-3-en-1 -yl)butan-2-yl)cvsteinate)
• Step 2 Ethvl-(4-oxo-4-(2,6,6-trimethylcvclohex-3-en-1 -vl)but-2-en-2-yl)cvsteinate (3 g, 8.8 mmol) was placed in a 100 ml two-neck round-bottom flask together with (£)- 1 - (2’,6’,6’-trimethylcyclohex-3’-en-T-yl)but-2-en-1 -one (1.7 g, 8.8 mmol). Water (50 ml), THF (10 ml) and potassium carbonate (1.2 g, 8.7 mmol) were added and the mixture was stirred at room temperature for three days.
• Odor description dry-down of a 10% DPG solution after 24 hours on a smelling strip: licorice, sweet, damascone.
• AMBROFIX (3a,6,6,9a-tetramethyldodecahydronaphtho[2,1 -b]furan) 1 methyl 2-aminobenzoate 2
• the fragrance composition above is a fresh floral green accord, reminiscent of fresh green muguet.
• This fragrance can be applied, e.g. in high density liquid detergent (HDLD, at 0.1 - 1 .5 wt% (e.g. 0.6 wt%).
• HDLD high density liquid detergent
• a liquid detergent composition (4.0 mg) was prepared with unperfumed heavy duty liquid detergent (HDLD) base containing 0.2% wt/wt of a mixture of Example 2. This liquid detergent composition was dissolved in 1 L of cold tap water to produce a wash liquor containing precursor.
• the wash liquor (100 ml_) was placed in a 150 mL conical flask together with 2 cotton pads (10x10 cm 2 , each weighing 2.5 g). The flask was closed with a screwcap and shaken on a thermostated shaking table at 200 rpm and 40‘C for 1 h. The liquids were discarded and the cotton pads wrung out (wet weight 4.5 g) and put back in the conical flasks.
• Example 7 Precursor deposition studies on cotton in heavy duty liquid detergent application
• Example 6 was repeated replacing the unperfumed heavy duty liquid detergent base with an unperfumed fabric conditioner base.
• the application involved a single cycle of shaking at 200 rpm at room temperature for 20 min, following by wringing out the cotton pads and ASE (accelerated solvent extractor) extraction.
• Example 2 which contains a mixture of bis- and mono adduct, leads to the release of a perceivable amount of d-Damascone already on wet stage.
• the amount of d-Damascone delivered from the precursor had slightly exceeded the amount when using free d-Damascone.
• the amount of bound and free d-Damascone delivered from the precursor on wet fabric was 2.6 times higher than when using free d-Damascone and over 25 times bigger on dry fabric.
• the results suggest also that a combination of free d-Damascone and precursor may produce advantageous effects.

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• 2019
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