[go: up one dir, main page]

DE2752972A1 - 2-Acetyl-1,3-dioxan derivs. used as perfume components - e.g. for perfume compsns., cosmetics, detergents, textile treatment agents and tobacco - Google Patents

2-Acetyl-1,3-dioxan derivs. used as perfume components - e.g. for perfume compsns., cosmetics, detergents, textile treatment agents and tobacco

Info

Publication number
DE2752972A1
DE2752972A1 DE19772752972 DE2752972A DE2752972A1 DE 2752972 A1 DE2752972 A1 DE 2752972A1 DE 19772752972 DE19772752972 DE 19772752972 DE 2752972 A DE2752972 A DE 2752972A DE 2752972 A1 DE2752972 A1 DE 2752972A1
Authority
DE
Germany
Prior art keywords
acetyl
perfume
tobacco
dioxane
detergents
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19772752972
Other languages
German (de)
Inventor
Klaus Dipl Chem Dr Bruns
Ulf-Armin Dipl Chem Dr Schaper
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henkel AG and Co KGaA
Original Assignee
Henkel AG and Co KGaA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Priority to DE19772752972 priority Critical patent/DE2752972A1/en
Publication of DE2752972A1 publication Critical patent/DE2752972A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D319/00Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
    • C07D319/041,3-Dioxanes; Hydrogenated 1,3-dioxanes
    • C07D319/061,3-Dioxanes; Hydrogenated 1,3-dioxanes not condensed with other rings
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24BMANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18Treatment of tobacco products or tobacco substitutes
    • A24B15/28Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/30Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
    • A24B15/36Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring
    • A24B15/40Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring having only oxygen or sulfur as hetero atoms
    • A24B15/403Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring having only oxygen or sulfur as hetero atoms having only oxygen as hetero atoms
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11BPRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B9/00Essential oils; Perfumes
    • C11B9/0069Heterocyclic compounds
    • C11B9/0073Heterocyclic compounds containing only O or S as heteroatoms
    • C11B9/008Heterocyclic compounds containing only O or S as heteroatoms the hetero rings containing six atoms

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Fats And Perfumes (AREA)

Abstract

2-Acetyl-1, 3-dioxan derivs. having formula (I) (where R1 to R6 are H, 1-4C alkul or Ph and no more than 2 of R1 to R6 in one mol may be Ph) are used as perfumes. Pref. perfume compsns. contain 1-50 wt. % of (I). The perfume compsns. can be used as perfumes and for perfuming cosmetics, detergents, disinfectants, textile treatment agent and tobacco. (I) have characteristic fragrance notes, ranging from bloomy, freshly metallic to a tobacco, note, and combine well to form new fragrances.

Description

"Verwendung von 2-Acetyl-1,3-dioxanen als Riechstoffe sowie"Use of 2-acetyl-1,3-dioxanes as fragrances as well

diese enthaltende Riechstorfkompositioner." Es wurde gefunden, daß 2-Acetyl-1,3-dioxane der allgemeinen Formel in der R1 - R6 Wasserstoff, einen Alkylrest mit 1 - 4 Kohlenstoffatomen oder einen Phenylrest darstellen, wobei nicht mehr als zwei der Reste R1 - R6 in einem Molekül ein Phenylrest ßein können, in vorteilhafter Weise als Riechstoffe der verschiedensten Geruchsnoten verwendet werden können.odoriferous peat compositions containing these. "It has been found that 2-acetyl-1,3-dioxanes of the general formula in which R1 - R6 represent hydrogen, an alkyl radical with 1-4 carbon atoms or a phenyl radical, where no more than two of the radicals R1 - R6 in one molecule can be a phenyl radical, can advantageously be used as fragrances of the most varied odor notes.

Die Herstellung der erfindungsgemäß als Riechstoffe zu verwendenden 2-Acetyl-1,3-dioxane der angegebenen Struktur erfolgt nach üblichen Methoden der organischen Chemie durch Umacetalisierung von 1,1-Dimethoxyaceton mit dem entsprechenden Diol in Gegenwart eines sauren Katalysators gemäß nachstehendem Schema. Als saurer Katalysator kann p-Toluolsulfonsäure, Schwefelsäure, Phosphorsäure oder ein Kationenaustauscher in der Säureform dienen. The 2-acetyl-1,3-dioxanes of the stated structure to be used as fragrances according to the invention are prepared by customary methods of organic chemistry by transacetalization of 1,1-dimethoxyacetone with the corresponding diol in the presence of an acidic catalyst according to the following scheme. The acidic catalyst used can be p-toluenesulfonic acid, sulfuric acid, phosphoric acid or a cation exchanger in the acid form.

Bei der beschriebenen Darstellungsweise treten in einigen Fällen Isomerengemische auf, deren Trennung aber nicht erforderlich ist, vielmehr können derartige Isomerengemische als Riechstoffe bzw. Komponenten von Riechstoffkompositionen Verwendung finden.In the case of the method of representation described, mixtures of isomers occur in some cases on, the separation of which is not necessary, rather such isomer mixtures can find use as fragrances or components of fragrance compositions.

Weitere Möglichkeiten zur Herstellung von Acetalen von α-Ketoaldehyden werden in der amerikanischen Patentschrift 2 751 343 sowie in der deutschen Auslegeschrift 1 254 138 beschrieben, ohne daß hieraus ein Hinweis auf die Riechstoffeigenschaften derartiger Produkte entnommen werden konnte.Further possibilities for the production of acetals from α-ketoaldehydes are in the American patent specification 2,751,343 and in the German Auslegeschrift 1 254 138 without any reference to the properties of the fragrance such products could be taken.

Als erfindungsgemäß zu verwendende 2-Acetyl-1,3-dioxane sind zum Beispiel 2-Acetyl-1,3-dioxan, 2-Acetyl-5,5-dimethyl-1, 3-dioxan, 2-Acetyl-5,5-diäthyl-1,3-dioxan, 2-Acetyl-5-methyl-5-propyl-1 3-dioxan, 2-Acetyl-5-Athyl-5-n-butyl-1,3-dioxan, 2-Acetyl-5-methyl-5-phenyl-1,3-dioxan, 2-Acetyl-4,6-dimethyl-1,3-dioxan, 2-Acetl-4,4,6-trimethyl-1,3-dioxan, 2-Acetyl-4-isopropyl-5,5-dimethyl-1,3-dioxan, 2-Acetyl-4,6-diphenyl-1,3-dioxan zu nennen.2-Acetyl-1,3-dioxanes to be used according to the invention are, for example 2-acetyl-1,3-dioxane, 2-acetyl-5,5-dimethyl-1,3-dioxane, 2-acetyl-5,5-diethyl-1,3-dioxane, 2-acetyl-5-methyl-5-propyl-1 3-dioxane, 2-acetyl-5-ethyl-5-n-butyl-1,3-dioxane, 2-acetyl-5-methyl-5-phenyl-1 , 3-dioxane, 2-acetyl-4,6-dimethyl-1,3-dioxane, 2-acetyl-4,4,6-trimethyl-1,3-dioxane, 2-acetyl-4-isopropyl-5,5-dimethyl-1, 3-dioxane, Mention should be made of 2-acetyl-4,6-diphenyl-1,3-dioxane.

Die erfindungsgemäß zu verwendenden 2-Acetyl-i,3-dioxane sind wertvolle Riechstoffe mit charakteristischen Duftnoten, die von blumig, frisch metallisch bis zur Tabaknote reichen. Ein besonderer Vorteil der errindungsgemaßen Riechstoffe ist ihre sehr gute Kombinationsflhigkeit zu neuartigen Geruchsnuancen.The 2-acetyl-i, 3-dioxanes to be used according to the invention are valuable Fragrances with characteristic scents ranging from floral to fresh metallic up to the tobacco note. A particular advantage of the fragrances according to the invention is their very good ability to combine with novel odor nuances.

Die erfindungsgemäß als Riechstofre zu verwendenden 2-Acetyl-1,3-dioxane können mit anderen Riechstoffen in den verschiedensten Mengenverhältnissen zu neuen Riechstoffkompositionen gemischt werden. Im allgemeinen wird sich der Anteil der 2-Acetyl-1,3-dioxane in den Riechstoffkompositionen in den Mengen von 1 - 50 Gewichtsprozent, bezogen auf die gesamte Komposition, bewegen. Derartige Kompositionen können direkt als ParfUm oder auch zur Parfümierung von Kosmetika wie Cremes, Lotionen, Duftwässern, Aerosolen, Toiletteseifen, technischen Artikeln, wie Wasch- und Reinigungsmitteln, Desinfektionsmitteln, Textilbehandlungsmitteln und Tabak dienen.The 2-acetyl-1,3-dioxanes to be used as fragrances according to the invention can be used with other fragrances in the most varied of proportions to create new ones Fragrance compositions are mixed. In general, the proportion of 2-acetyl-1,3-dioxane in the fragrance compositions in amounts of 1 - 50 percent by weight, in relation to the entire composition, move. Such compositions can be directly as Perfume or for perfuming cosmetics such as creams, lotions, scented waters, Aerosols, toilet soaps, technical articles such as detergents and cleaning agents, Disinfectants, textile treatment agents and tobacco are used.

Die nachfolgenden Beispiele sollen den Gegenstand der Erfindung näher erläutern, ohne ihn jedoch hierauf zu beschränken.The following examples are intended to illustrate the subject matter of the invention in greater detail explain without, however, restricting it to this.

B e i s p i e 1 e Die Herstellung der in nachstehender Tabelle aufgeführten 2-Acetyl-1,3-dioxane erfolgte gemäß folgender allgemeiner Arbeitsweise. 1 Mol (118 g) 1,1-Dimethoxyaceton, 1,1 Mol des entsprechenden 1,3-Diols und eine Spatelspitze p-Toluolsulfonsäure wurden zunächst bei ca. 100°C 1/2 Stunde verrührt. Example 1 e The manufacture of the items listed in the table below 2-Acetyl-1,3-dioxane was carried out according to the following general procedure. 1 mole (118 g) 1,1-dimethoxyacetone, 1.1 moles of the corresponding 1,3-diol and a spatula tip p-Toluenesulfonic acid was initially stirred at about 100 ° C. for 1/2 hour.

Anschließend wurde während ca. 3 Stunden das entstandene Methanol langsam abdestilliert. Das erhaltene Rohprodukt wurde mit Sodalösung gewaschen und anschließend fraktioniert destilliert.The methanol formed was then used for about 3 hours slowly distilled off. The obtained crude product was washed with soda solution and then fractionally distilled.

Die erhaltenen Verbindungen wiesen folgende charakteristische NMR-Signale auf: 2,1 - 2,5 ppm Singulett 3 Protonen der Acetylmethylgruppe 6 = 4,4 - 4,75 ppm Singulett 1 Proton in 2-Stellung des Dioxanringes.The compounds obtained had the following characteristic NMR signals on: 2.1 - 2.5 ppm singlet 3 protons of the acetylmethyl group 6 = 4.4 - 4.75 ppm Singlet 1 proton in position 2 of the dioxane ring.

T a b e l l e Produkt Bezeichnung Siedep./Druck D Geruch °C / Torr "20 A 2-Acetyl-1,3- 81 / 14 1,4380 technisch, dioxan frisch, metallisch B 2-Acetyl-5,5- 87 / 18 1,4345 süß, brotig, dimethyl-1,3- Malznote dioxan C 2-Acetyl-5,5- diäthyl-1,3- 120 / 14 1,4475 grün dioxan D 2-Acetyl-5- 120 / 15 1,4430 blumig, Muguet- methyl-5- 120 / 15 1,4490 Dinung, Mug Propyl-1,3- Bonbon-Note dioxan E 2-Acetyl-5- 82 / 0,05 1,4510 Iris-,Lumber- äthyl-5-n- jack-Note butyl-1,3- dioxan F 2-Acetyl-5- 102 / 0,05 1,5210 schwache Tabak- methyl-5- note, sauer phenyl-1,3- dioxan G 2-Acetyl-4,4,- 42 / 0,3 1,4325 sauer 6-trimethyl- 1,3-dioxan H 2-Acetyl-4- 63 / 0,2 1,4430 typische isopropyl- Tabaknote 5, 5-dimethyl- 1,3dioxan Beispiel 1 Tabakparfümierung 2-Acetyl-4-isopropyl-5,5-dimethyl-1,3-dioxan 250 Gew.-Teile γ-Methyljonon 200 Gew.-Teile Verbeniax (Roure-Bertrand) 150 Gew.-Teile Bergamottöl 150 Cetone K.V. (Roure Bertrand) 50 " Vetiveröl 50 " Vetiverylacetat 50 " Orangenöl süß, Florida 50 " Cedernholzöl weiß, Virginia 50 " 1 000 Gew.-Teile Beispiel 2 Blumen-Jasmin-Komplex 2-Acetyl-5-methyl-5-propyl-1,3-dioxan 150 Gew.-Teile α-Hexylzimtaldehyd 200 " " Phenyläthylalkohol 100 " " Terpineol 90 " " Geraniol 50 " " Linialcol 50 " " Verbeniax (Roure Betrand) 50 " " γ-Methyljonon 50 " " ß-Hexenylacetat (10 % in DEP) 50 " " Moschus-Keton 40 " " Citronellaylacetat 40 " " Cumarin 30 " " Guajylacetat 30 " " Cedrylacetat 30 " " Aldehyd C9 (10 % in DEP) 20 n Cyclamenaldehyd 10 " Phenylacetaldehy (50 %ig) 10 " 1 000 Gew.-Teile.Tabel Product description Boiling point / pressure D Odor ° C / Torr "20 A 2-acetyl-1,3- 81/14 1.4380 technical, fresh dioxane, metallic B 2-Acetyl-5,5- 87/18 1,4345 sweet, bread-like, dimethyl-1,3 malt note dioxane C 2-acetyl-5,5- diethyl 1,3-120 / 14 1,4475 green dioxane D 2-Acetyl-5- 120/15 1.4430 flowery, Muguet- methyl-5- 120/15 1.4490 Dinung, Mug Propyl 1,3 sweet note dioxane E 2-acetyl-5- 82 / 0.05 1.4510 Iris-, Lumber- Ethyl-5-n-jack note butyl-1,3- dioxane F 2-acetyl-5- 102 / 0.05 1.5210 weak tobacco methyl-5 note, acidic phenyl-1,3- dioxane G 2-acetyl-4,4, - 42 / 0,3 1.4325 acidic 6-trimethyl- 1,3-dioxane H 2-acetyl-4- 63 / 0.2 1.4430 typical isopropyl tobacco note 5, 5-dimethyl 1,3dioxane Example 1 Tobacco perfuming 2-acetyl-4-isopropyl-5,5-dimethyl-1,3-dioxane 250 parts by weight γ-methyljonone 200 parts by weight Verbeniax (Roure-Bertrand) 150 parts by weight bergamot oil 150 Cetone KV (Roure Bertrand) 50 "vetiver oil 50" vetiveryl acetate 50 "orange oil sweet, Florida 50" cedarwood oil white, Virginia 50 "1,000 parts by weight Example 2 Flower-jasmine complex 2-acetyl-5-methyl-5-propyl-1 , 3-dioxane 150 parts by weight α-hexylcinnamaldehyde 200 "" phenylethyl alcohol 100 "" terpineol 90 "" geraniol 50 "" linialcol 50 "" verbeniax (Roure Betrand) 50 "" γ-methylionon 50 "" ß-hexenyl acetate (10 % in DEP) 50 "" Musk ketone 40 "" Citronellaylacetat 40 "" Coumarin 30 "" Guajyl acetate 30 "" Cedrylacetat 30 "" Aldehyde C9 (10% in DEP) 20 n Cyclamenaldehyde 10 "Phenylacetaldehy (50%) 10" 1,000 parts by weight.

Claims (3)

"Verwendung von 2-Acetyl-1,3-dioxanen als Riechstoffe sowie diese enthaltende Riechstoffkompositionen II' PatentansDrUche: 1. Verwendung von 2-Acetyl-1,3-dioxanen der allgemeinen Formel in der R1 - R6 Wasserstoff, einen Alkylrest mit 1 -Kohlenstoffatomen oder einen Phenylrest darstellen, wobei nicht mehr als zwei der Reste R1 - R6 in einem Molekül ein Phenylrest sein können, als Riechstoffe."Use of 2-acetyl-1,3-dioxanes as odorants and odorant compositions containing them II 'PatentansDrUche: 1. Use of 2-acetyl-1,3-dioxanes of the general formula in which R1 - R6 represent hydrogen, an alkyl radical with 1 carbon atoms or a phenyl radical, with no more than two of the radicals R1 - R6 in a molecule being able to be a phenyl radical, as fragrances. 2. Riechstoffkompositiönen, gekennzeichnet durch einen Gehalt an 2-Acetyl-1,3-dioxanen nach Anspruch 1.2. Fragrance compositions, characterized by a content of 2-acetyl-1,3-dioxanes according to claim 1. 3. Riechstoffkompositionen nach Anspruch 2, dadurch gekennzeichnet, daß sie die 2-Acetyl-1,3-dioxane in einer Menge von 1 bis 50 Gewichtsprozent, bezogen auf die gesamte Komposition, enthalten.3. fragrance compositions according to claim 2, characterized in that that they are based on the 2-acetyl-1,3-dioxanes in an amount of 1 to 50 percent by weight on the entire composition.
DE19772752972 1977-11-28 1977-11-28 2-Acetyl-1,3-dioxan derivs. used as perfume components - e.g. for perfume compsns., cosmetics, detergents, textile treatment agents and tobacco Withdrawn DE2752972A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19772752972 DE2752972A1 (en) 1977-11-28 1977-11-28 2-Acetyl-1,3-dioxan derivs. used as perfume components - e.g. for perfume compsns., cosmetics, detergents, textile treatment agents and tobacco

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772752972 DE2752972A1 (en) 1977-11-28 1977-11-28 2-Acetyl-1,3-dioxan derivs. used as perfume components - e.g. for perfume compsns., cosmetics, detergents, textile treatment agents and tobacco

Publications (1)

Publication Number Publication Date
DE2752972A1 true DE2752972A1 (en) 1979-05-31

Family

ID=6024783

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19772752972 Withdrawn DE2752972A1 (en) 1977-11-28 1977-11-28 2-Acetyl-1,3-dioxan derivs. used as perfume components - e.g. for perfume compsns., cosmetics, detergents, textile treatment agents and tobacco

Country Status (1)

Country Link
DE (1) DE2752972A1 (en)

Similar Documents

Publication Publication Date Title
EP0033928A2 (en) Use of alkyl-substituted 1,3-dioxolanes as perfumes, and perfume compositions containing them
DE2648109C2 (en) 4-isopropyl-5,5-dimethyl-1,3-dioxane-containing fragrance compositions and 4-isopropyl-5,5-dimethyl-1,3-dioxanes as such
DE2455761A1 (en) Novel hydrogenated methyl ionone odoriferous derivs - made in high yields by redn. using a raney nickel-copper chromite catalyst combination
EP0039029B1 (en) Use of substituted 2-(1-methylbutyl)-1,3-dioxanes as perfuming agents and perfume compositions containing them
EP0021356B1 (en) 4(5)-acetyl-7,7,9(7,9,9)-trimethyl-bicyclo(4.3.0)non-1-ene, its preparation and use as perfume, and perfume compositions containing it
EP0028780B1 (en) 2-alkyl-1,4-dioxaspiro(4,n) alkanes, their production and use as perfumes, and perfume compositions containing them
DE2063166C3 (en) Condensed dioxolanes, process for their production and their use as odoriferous substances
DE2928347C2 (en) Aliphatic ethers of hydroxymethylcyclododecane, combinations of substances containing them and their use for the production of fragrance compositions
DE3341605A1 (en) ALPHA-TERTIAERE DIMETHYLACETALE, THEIR PRODUCTION AND USE AS A FRAGRANCE
EP0043507B1 (en) 2,4-dioxa-7,10 methano-spiro(5,5)undecanes, their preparation as well as perfume compositions containing them
EP0024473B1 (en) Application of a group of dioxa-alkyl-tricyclododecenes as perfumes; perfuming compositions containing them; dioxa-alkyl-tricyclododecenes belonging to this group
DE2305981B2 (en) Naphthopyran mixtures, processes for their production and fragrance compositions with a content of these mixtures
DE2752972A1 (en) 2-Acetyl-1,3-dioxan derivs. used as perfume components - e.g. for perfume compsns., cosmetics, detergents, textile treatment agents and tobacco
DE2928348C2 (en) 2-Alkoxiethyl-cycloalkyl-ethers and their use as odoriferous substances or in odoriferous substance compositions
DE3216085A1 (en) SUBSTITUTED 3-ISOPROPYL-CYCLOPENTANONE DERIVATIVES, THE PRODUCTION AND USE THEREOF AS A FRAGRANCE, AND THE COMPOSITIONS THAT CONTAIN THEM
DE2734295A1 (en) 2,2,5-TRIMETHYL-5-PHENYL-1,3-DIOXANE, ITS PRODUCTION, USE AS A FRAGRANCE, AS WELL AS FRAGRANCE COMPOSITIONS CONTAINING THIS
EP0330995B1 (en) Bicyclic ethers
EP0549640B1 (en) Isomeric 11-oxa-tricyclo[7.3.0.0]dodecene derivatives, their preparation ant their use as odoriferous substances, as well as perfume compositions containing such derivatives
EP0006572B1 (en) 13,15 - dioxabicyclo (10,5,0)-heptadecanes, their preparation and use as perfume, and odoriferous compositions containing them
EP0026323B1 (en) 4(5)-acetyl-9,9-dimethyltricyclo-(4,4,0,1(8,10))-undec-1-ene, its preparation and use as odorant, and odorant composition containing it
DE2629000A1 (en) USE OF ALKYL-SUBSTITUTED 1,4-DIOXANES AS FRAGRANCE SUBSTANCES, AS WELL AS THESE FRAGRANCE COMPOSITIONS
DE4423357A1 (en) 3-substd. tetra:hydro-furan derivs. are aromatic substances
DE3835190A1 (en) ISOMERE TRIMETHYLBICYCLO (4.3.0) NONAN DERIVATIVES
DE3046068A1 (en) TERPEN DERIVATIVES, THEIR PRODUCTION, USE AS A FRAGRANCE, AND THESE COMPOSITIONS CONTAINING THEM
EP0340645A1 (en) Formyl-Trimethylbicyclo(2,2,2)oct-7-ene Isomers

Legal Events

Date Code Title Description
8130 Withdrawal