Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C43/00—Ethers; Compounds having groups, groups or groups
  • C07C43/02—Ethers
  • C07C43/20—Ethers having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring
  • C07C43/23—Ethers having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring containing hydroxy or O-metal groups
• • A—HUMAN NECESSITIES
  • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
  • A23L—FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
  • A23L27/00—Spices; Flavouring agents or condiments; Artificial sweetening agents; Table salts; Dietetic salt substitutes; Preparation or treatment thereof
  • A23L27/20—Synthetic spices, flavouring agents or condiments
  • A23L27/204—Aromatic compounds
• • 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
  • A61K8/34—Alcohols
  • A61K8/347—Phenols
• • 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
  • A61K8/41—Amines
  • A61K8/415—Aminophenols
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q11/00—Preparations for care of the teeth, of the oral cavity or of dentures; Dentifrices, e.g. toothpastes; Mouth rinses
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/20—Chemical, physico-chemical or functional or structural properties of the composition as a whole
  • A61K2800/24—Thermal properties
  • A61K2800/244—Endothermic; Cooling; Cooling sensation

Definitions

• the present invention relates to para-substituted 2-alkoxyphenols having cooling properties.
• the present invention refers furthermore to a process for their production and to consumer products comprising them.
• Cooling compounds that is, chemical compounds that impart a cooling sensation to the skin or the mucous membranes of the body, are well known to the art and are widely used in a variety of products such as foodstuffs, tobacco products, beverages, chewing gum, dentifrices, mouthwashes and toiletries.
• l-menthol A most well-known compound is l-menthol, which is found naturally in oil of mint. Since menthol has a strong minty odor and a bitter taste, and provides a burning sensation when used in high concentrations, a variety of other menthyl ester-based and menthyl carboxamide-based cooling compounds have been developed. One that has enjoyed substantial success is N-ethyl p-menthane-carboxamide (WS-3) and is thus also often used as benchmark.
• WS-3 N-ethyl p-menthane-carboxamide
• R 1 is methyl or ethyl
• Y is, NH, O, or S
• R 2 and R 3 are independently selected from at least one of hydrogen or C 1-3 alkoxy, such as methoxy, ethoxy or iso-propoxy; n is 0 or 1 ; and the dotted line between C-2 and C-2' represents at least one of no bond, a single bond, or a -(CH 2 ) m - group, wherein m is 1 or 2.
• Non-limiting examples are compounds of formula (I) wherein R 2 is bonded at C-4, R 3 is bonded at C-4 ' , or R 2 and R 3 are bonded at C-4 and C-4' respectively.
• Non-limiting examples also include compounds of formula (I) wherein R 2 and R 3 have the same chemical formula.
• embodiments are compounds of formula (I) comprising at least one of 4- ((benzhydrylamino)methyl)-2-methoxyphenol, 4-((bis(4-methoxyphenyl)-methylamino)- methyl)-2-methoxyphenol, 4-((1 ,2-diphenylethylamino)methyl)-2-methoxyphenol, 4- ((benzhydryloxy)methyl)-2-methoxyphenol, 4-((9H-fluoren-9-ylamino)methyl)-2- methoxyphenol or 4-((benzhydrylamino)methyl)-2-ethoxyphenol.
• the compounds of formula (I) may be used in products that are applied to mucous membranes such as oral mucosa, or the skin, to give a cooling sensation.
• applying is meant any form of bringing into contact, for example, oral ingestion, topical application or, in the case of tobacco products, inhalation.
• the skin it may be, for example, by including the compound in a cream or salve, or in a sprayable composition.
• a method of providing a cooling effect to the mucous membrane or skin by applying thereto a product comprising an effective amount of a compound as hereinabove described.
• Products that are applied to the oral mucosa may include foodstuffs and beverages taken into the mouth and swallowed, and products taken for reasons other than their nutritional value, e.g. tablets, mouthwash, throat sprays, dentifrices and chewing gums.
• Products that are applied to the skin may be selected from perfumes, toiletries, lotions, oils and ointments, applicable to the skin of the human body, whether for medical or other reasons. Accordingly, in a further aspect there is provided a composition comprising an amount of at least one compound of formula (I) sufficient to stimulate the cold receptors in the areas of the skin or mucous membrane with which the composition comes into contact and thereby promote the desired cooling effect.
• a cooling effect may be achieved upon application of a product, for example, mouthwash or chewing gums, to the mucous membrane, e.g. oral mucosa, comprising less than 5000 ppm, in certain embodiments between 50 and 3000 ppm, such as about 500 ppm, of a compound of formula (I). If used for beverages the addition of about 15ppm may be sufficient to achieve a cooling effect.
• a product for example, mouthwash or chewing gums
• foodstuffs and beverages may include, but are not limited to, beverages, alcoholic or non-alcoholic, such as fruit juice beverages, fruit liquors, milk drinks, carbonated beverages, refreshing beverages, and health and nutrient drinks; frozen confectionery such as ice creams and sorbets; desserts such as jelly and pudding; confectionery such as cakes, cookies, chocolates, and chewing gum; jams; candies; breads; tea beverages such as green tee, black tea, chamomile tea, mulberry leaf tea, Roobos tea, peppermint tea; soaps; seasonings; instant beverages; snack foods and the like.
• beverages such as fruit juice beverages, fruit liquors, milk drinks, carbonated beverages, refreshing beverages, and health and nutrient drinks
• frozen confectionery such as ice creams and sorbets
• desserts such as jelly and pudding
• confectionery such as cakes, cookies, chocolates, and chewing gum
• jams candies
• tea beverages such as green tee, black tea, chamomile tea, mulberry
• topical products may include, but are not limited to, skin-care cosmetics, such as cleansing tissues, talcum powders, face creams, lotions, tonics and gels, hand creams, hand- and body lotions, anticellulite/slimming creams and -lotions, lotions, balms, gels, sprays and creams; sunburn cosmetics including sunscreen lotions, balms, gels, sprays and creams; after sun lotions, sprays and creams; soaps, toothpicks, lip sticks, agents for bathing, deodorants and antiperspirants, face washing creams, massage creams, and the like.
• skin-care cosmetics such as cleansing tissues, talcum powders, face creams, lotions, tonics and gels, hand creams, hand- and body lotions, anticellulite/slimming creams and -lotions, lotions, balms, gels, sprays and creams
• sunburn cosmetics including sunscreen lotions, balms, gels, sprays and cream
• an end-product selected from at least one of products that are applied to the oral mucosa or products that are applied to the skin, such as topical products, oral care products, nasal care products, toilet articles, ingestible products and chewing gum, and the like, the end-product comprises a product base and an effective amount of at least one cooling compound of formula (I) as defined herein above.
• the compounds as hereinabove described may be used alone or in combination with other cooling compounds known in the art, e.g. menthol, menthone, isopulegol, N-ethyl p-menthanecarboxamide (WS-3), N,2,3-trimethyl-2-isopropylbutanamide (WS-23), menthyl lactate, menthone glycerine acetal (Frescolat ® MGA), mono-menthyl succinate (Physcoof), mono-menthyl glutarate, O-menthyl glycerine (CoolAct ® 10) and 2-sec- butylcyclohexanone (Freskomenthe ® ), menthane, camphor, pulegol, cineol, mint oil, peppermint oil, spearmint oil, eucalyptus oil, 3-l-menthoxypropane-1 ,2-diol, 3-I- menthoxy-2-methylpropane-1 ,2-di
• the cooling compounds may be employed into the products simply by directly mixing the compound with the product, or they may, in an earlier step, be entrapped with an entrapment material such as polymers, capsules, microcapsules and nanocapsules, liposomes, film formers, absorbents such as cyclic oligosaccharides, or they may be chemically bonded to a substrate, which are adapted to release the cooling compound upon application of an external stimulus such as temperature, enzyme or the like, and then mixed with the product.
• an entrapment material such as polymers, capsules, microcapsules and nanocapsules, liposomes, film formers, absorbents such as cyclic oligosaccharides, or they may be chemically bonded to a substrate, which are adapted to release the cooling compound upon application of an external stimulus such as temperature, enzyme or the like, and then mixed with the product.
• alcohols or polyhydric alcohols such as, glycerine, propylene glycole, triazethine and mygliol, natural gums such as gum Arabic, or surfactants, such as glycerine fatty acid esters and saccharide fatty acid esters.
• R 1 is methyl or ethyl
• Y is, NH, O, or S; R 2 and R 3 are independently selected from at least one of hydrogen or Ci -3 alkoxy, such as methoxy, ethoxy or iso-propoxy; n is 0 or 1; and the dotted line between C-2 and C-2' represents at least one of no bond, a single bond, or a -(CH 2 ) m - group, wherein m is 1 or 2.
• the compounds of formula (I) wherein Y is NH can be prepared by the reaction of the appropriate diphenylmethanamine with the appropriated 3-alkoxy-4-hydroxy- benzaldehyde resulting in the corresponding imine, which is then further reduced resulting in a secondary amine.
• the compounds of formula (I) wherein Y is O can be prepared by reaction of the appropriated diphenylmethanol with the appropriated 4-(hydroxymethyl)-2- alkoxyphenol.
• the compounds of formula (I) wherein Y is S can be prepared by alkylation of the appropriated protected 4-(mercaptomethyl)-2-methoxyphenol with the appropriated diphenylmethyl halide.
• Example 1 & 2 The procedure outlined in Example 1 & 2 is repeated with bis(4-methoxyphenyl)- methylamine resulting in 4-((bis(4-methoxyphenyl)rnethylamino)methyl)-2- methoxyphenol.
• Example 2 The procedure outlined in Example 1 is repeated with 1 ,2-diphenylethanamine resulting in 4-((1 ,2-diphenylethylamino)methyl)-2-methoxyphenol.
• Example 2 The procedure outlined in Example 1 is repeated with 9H-fluoren-9-amine and vanillin resulting in 4-((9H-fluoren-9-ylamino)methyl)-2-methoxyphenol (mp: 148 - 150 0 C).
• Example 2 The procedure outlined in Example 1 is repeated with 3-ethoxy-4-hydroxybenzaldehyde resulting in 4-((benzhydrylamino)methyl)-2-ethoxyphenol (mp: 89 - 91 0 C).
• the compounds of the present invention are at least 2 times stronger than l-menthol and also stronger than VVS-3.
• the chemicals are mixed in the toothgel, a piece of toothgel is put on a toothbrush and a panelist's teeth are brushed.
• the mouth is rinsed with water and the water is spat out.
• An intense cooling sensation is felt by the panelist in all areas of the mouth, with a slight bitterness.
• the cooling perception lasts for 45 minutes.

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• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Public Health (AREA)
• Chemical & Material Sciences (AREA)
• Veterinary Medicine (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Organic Chemistry (AREA)
• Epidemiology (AREA)
• Birds (AREA)
• Oral & Maxillofacial Surgery (AREA)
• Dermatology (AREA)
• Emergency Medicine (AREA)
• Nutrition Science (AREA)
• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Polymers & Plastics (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Cosmetics (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (2)

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• 2007
  • 2007-03-13 US US12/282,349 patent/US20090035364A1/en not_active Abandoned
  • 2007-03-13 CN CNA2007800090260A patent/CN101400636A/zh active Pending
  • 2007-03-13 BR BRPI0709393-4A patent/BRPI0709393A2/pt not_active IP Right Cessation
  • 2007-03-13 EP EP07710796A patent/EP1996535A2/en not_active Withdrawn
  • 2007-03-13 JP JP2008558614A patent/JP2009529545A/ja not_active Ceased
  • 2007-03-13 WO PCT/CH2007/000135 patent/WO2007104175A2/en not_active Ceased

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