CH590059A5 - 4-Penten-2-ol derivs. of ionone series - prepd. from aldehydes and used as sandalwood oil substitutes in perfumery and cosmetics - Google Patents

4-Penten-2-ol derivs. of ionone series - prepd. from aldehydes and used as sandalwood oil substitutes in perfumery and cosmetics

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Publication number
CH590059A5
CH590059A5 CH1634476A CH1634476A CH590059A5 CH 590059 A5 CH590059 A5 CH 590059A5 CH 1634476 A CH1634476 A CH 1634476A CH 1634476 A CH1634476 A CH 1634476A CH 590059 A5 CH590059 A5 CH 590059A5
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Prior art keywords
methyl
formula
cosmetics
penten
perfumery
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CH1634476A
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German (de)
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Givaudan & Cie Sa
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Publication of CH590059A5 publication Critical patent/CH590059A5/en

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    • 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
    • C11B9/0026Essential oils; Perfumes compounds containing an alicyclic ring not condensed with another ring
    • C11B9/0034Essential oils; Perfumes compounds containing an alicyclic ring not condensed with another ring the ring containing six carbon atoms
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C403/00Derivatives 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
    • C07C403/06Derivatives 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 singly-bound oxygen atoms
    • C07C403/08Derivatives 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 singly-bound oxygen atoms by hydroxy groups
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C403/00Derivatives 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
    • C07C403/14Derivatives 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
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D303/00Compounds containing three-membered rings having one oxygen atom as the only ring hetero atom
    • C07D303/02Compounds containing oxirane rings
    • C07D303/04Compounds containing oxirane rings containing only hydrogen and carbon atoms in addition to the ring oxygen atoms
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2601/00Systems containing only non-condensed rings
    • C07C2601/12Systems containing only non-condensed rings with a six-membered ring
    • C07C2601/14The ring being saturated
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2601/00Systems containing only non-condensed rings
    • C07C2601/12Systems containing only non-condensed rings with a six-membered ring
    • C07C2601/16Systems containing only non-condensed rings with a six-membered ring the ring being unsaturated

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Fats And Perfumes (AREA)

Abstract

New 4-pentene-2-ols of ionone series of formula (I):- (where R1 is H or Me; R2 is 1-6C alkyl and one of the 2 dotted lines may be an additional bond), are prepd. by reacting an aldehyde of formula (II) with an organometallic cpd. A-Me or Hal-Al-Me2 (where A is alkali metal or Hal-Mg- and Hal is Cl, Br or I), pref. MeMgI or MeMgBr, and hydrolysis. (I) can replace sandalwood oil in perfumery and cosmetics, and are used in (i) perfume compsns., e.g. contng. 0.1-40 wt.% (I), pref. by adding (I) to known compsns. or by mixing (II) with perfume components; (ii) perfuming technical products and cosmetics, by adding 1 ppm. to 6 wt.% (I), e.g. for soaps, detergents, lotions, creams, etc.

Description

  

  
 



   Die vorliegende Erfindung betrifft Riechstoffkompositionen, die durch einen Gehalt an neuen Verbindungen der allgemeinen Formel
EMI1.1     
 worin R1 Wasserstoff oder Methyl und R2   Cla-Alkyl    bedeuten und eine der beiden punktiert gezeichneten Linien eine zusätzliche Bindung sein kann, wobei im Falle von Cyclohexenylderivaten R2 nicht Methyl sein kann, gekennzeichnet sind.



   Die Verbindungen der Formel I besitzen besondere Riechstoffeigenschaften, und zwar sind sie gekennzeichnet durch eine besonders   schBne    Sandelholznote. Eine solche Geruchsnote war bisher in der Jononreihe, also bei Verbindungen wie denen der Formel I,   völlig    unbekannt. Die Verbindungen der Formel I   können    daher als Riechstoffe verwendet werden. Da   Sandelholzöl    ein in der   Parffimerie    sehr   geschätztes    und unentbehrliches Ingredienz ist, das immer knapper und damit teurer wird, besteht ein grosses Bedürfnis nach geeigneten Substituenten. Die neuen Verbindungen sind weitgehend in der Lage, das   Sandelholzöl    in der   Parfimerie    und Kosmetik zu ersetzen.

  Sie eignen sich zur Herstellung von Parfiimkompositionen und Eaux de Cologne, denen sie oft eine dezente Note verleihen, in Mengen von etwa 0,1-40   Gew.5S,    als auch zur   Parfiimierung    von technischen und kosmetischen Produkten aller Art wie Seifen, festen und   fliissigen    Detergentien, Bade   zusätzen,    Lotionen,   Crimes,    Pudern, Deodorantien usw., in Gewichtsverhältnissen von 1 ppm bis etwa   6%,    wobei diese Werte jedoch sowohl unter- wie   iiberschritten    werden   können.   



   Beispiel
Riechstoffkomposition
Gewichtsteile    a -Jonon    400 a-iso-Methylionon 200    Phenyläthylalkohol    200    d 2-Octinsäuremethylester     (10% in Alkohol   95 )    40
Rhodinol pur 20    Geraniums1    Bourbon 20
Heliotropin 20    Ylang-Ylangöl    extra 20    3-Methyl-5-(2,2,6-trimethyl-    cyclohexyl)-4-penten-2-ol 80
1000
Die Grundkomposition (Veilchen-Typ) wird durch den Zusatz von   3-Methyl-5-(2,2,6-trimethyl-cyclohexyl)-4-    penten-2-ol blumiger und erhalt eine charakteristische Sandel Note.



   Die Verbindungen der Formel I   können    dadurch hergestellt   'verden,    dass man einen Aldehyd der Formel
EMI1.2     
 worin R1 und R2 sowie die beiden punktiert gezeichneten Linien die vorstehend angegebenen Bedeutungen haben, mit einer metallorganischen Verbindung der Formel A-CH3 oder Hal-Al(CH3)2, in der A ein Alkalimetall oder ein Rest Hal-Mg- ist und Hal   Chloro    Brom oder Jod bedeutet, umsetzt und hydrolysiert, wobei Umsetzung und Hydrolyse in an sich bekannter Weise erfolgen   können.   



   Bevorzugte Verbindungen der Formel I sind: 3-Methyl-5-(2,2,6-trimethylcyclohexyl)-4-penten-2-ol; 3-Methyl-5-(2,2-dimethyl-6-methylencyclohexyl)-4-penten-
2-ol und 3-Äthyl-5-(2,6,6-trimethyl-2-cyclohexenyl)-4-penten-2-ol; die aus den entsprechenden Aldehyden, nämlich aus 2-Methyl-4-(2,2,6-trimethylcyclohexyl)-3-butenal; 2-Methyl-4-(2,2-dimethyl-6-methylencyclohexyl)-3-butenal und   2-Athyl-4-(2,6,6-trimethyl-2-cyclohexenyl)-3-butenal    in vorstehend angegebener Weise hergestellt werden können.



   Die Ausgangsverbindungen der Formel II sind neu.



   Diese Aldehyde der Formel II   kBnnen    nach an sich bekannten Methoden hergestellt werden, beispielsweise durch Glycidester-Kondensation nach Darzens-Erlenmeyer-Claisen aus Verbindungen der Formel
EMI1.3     
  in der R1 und R2 sowie die beiden punktiert gezeichneten Linien die vorstehend angegebenen Bedeutungen haben.



   Die Umsetzung zu einem Glycidester findet mit einem   Halogenessigsäureester    in Gegenwart eines alkalischen Kondensationsmittels statt, der dann durch vorsichtige Hydrolyse in die freie   Azure    übergeführt und decarboxyliert wird.



   Die Aldehyde der Formel II können aber auch dadurch hergestellt werden, dass man ein Keton der Formel III in an sich bekannter Weise (s. J. Am. Soc. 84, 3782 [1962]; Tetr.



  Lett. 1963, 169 und J. Am. Soc. 87, 1353 [1965]) mit einer Schwefelverbindung der Formel
EMI2.1     
 zu Epoxiden der Formel
EMI2.2     
 worin R1 und R2 sowie die punktiert gezeichneten Linien die vorstehend angegebenen Bedeutungen haben, umsetzt und diese durch Behandlung mit schwachen   Lewis-Sauren    wie LiClO4, in einem aprotischen Lösungsmittel, vorzugsweise in einem   Ather    wie Tetrahydrofuran, Dioxan oder 1,2-Dimeth   oxyithan,    isomerisiert.



   Die folgenden Beispiele illustrieren die vorliegende Erfindung:
Synthesebeispiel 1
Ein Gemisch aus 192 g a-Jonon, 165,4 g   Chloressigsäure-      athylester,    500 mg Phenothiazin und 100 ml Pyridin wird bei -10 bis   -15"    C unter Ausschluss von Feuchtigkeit und Luftsauerstoff innert 30 Minuten mit 81 g Natriummethylat versetzt. Nach Zusatz von 100 ml absolutem   Ather    wird das Gemisch 4 Stunden bei   C      gerührt    und unter Kühlung mit 400 ml 15 %iger methanolischer Natronlauge versetzt. Es wird 1 Stunde bei   10     C   gerührt,      auf - 300    C   abgekiihlt    und durch Zugabe von 600 ml Eisessig ein pH von etwa 4 eingestellt.



  Nach Erwärmung auf Raumtemperatur wird 1 Liter Wasser zugegeben und nochmals 15 Minuten geriihrt (CO2-Entwicklung). Extraktion mit Hexan, Waschen der organischen Phase bis zur   Neutralität,    Trocknen mit wasserfreiem Natriumsulfat und Abziehen des Lösungsmittels unter vermindertem Druck liefert 190 g eines   diinnfliissigen    braunen Rohproduktes, das der fraktionierten Destillation im Vakuum unterworfen wird und 125 g   2-Methyl-4-(2,6,6-trimethyl-2-cyclohexenyl)-3-    butenal ergibt, Kp.0,15 = 900, nD20 = 1,4880.



   Synthesebeispiel 2
In eine Lösung von 62 g 2-Methyl-4-(2,6,6-trimethyl-2cyclohexenyl)-3-butenal in 700 ml   Ather    wird unter Stickstoff   bei 100    eine Lösung von Methylmagnesiumjodid, hergestellt aus 11 g   Magnesiumspänen    und 76 g Methyljodid, in 700 ml absolutem   anther    eingetropft. Das Reaktionsgemisch wird 4 Stunden bei   30     geriihrt und dann auf einen   Überschuss    eiskalter Ammoniumchloridlösung gegossen.

  Man extrahiert in   üblicher    Weise mit   Ather,    wäscht den Extrakt mit Wasser neutral, trocknet mit wasserfreiem Natriumsulfat und erhält 66 g eines gelben, leicht viskosen   tEls,    das nach Destillation im Vakuum 52 g   3-Methyl-5-(2,6,6-trimethyl-2-cyclohexenyl)-    4-penten-2-ol liefert,   Kp.o,008    =   90 ,      nD20    = 1,4890.



   Die Verbindung weist einen sehr   schönen,    haftfesten Sandelholzgeruch auf.



   Synthesebeispiel 3
In zu den Synthesebeispielen 1 und 2 analoger Weise wurden folgende Verbindungen hergestellt: 2-Äthyl-4-(2,6,6-trimethyl-2-cyclohexenyl)-3-butenal;
IR(Film): 2700, 1730, 1455, 1385, 1365, 980, 830   cm-t.   



  3-Äthyl-5-(2,6,6-trimethyl-2-cyclohexenyl)-4-penten-2-ol,    Kp.o,08    = 82 ;nD20 = 1,4929; IR(Film): 3350, 1460, 1385, 1370, 980   cm-1.   



   Geruch: Sandela, sandelholzartig.



  3-Methyl-5-(2,2,6-trimethylcyclohexyl)-4-penten-2-ol,
Kp.0,001 =   63 ;    nD20 = 1,4810; IR(Film): 3450, 1450,
1380, 1370, 1360, 1085, 980, 930, 920, 900   cm-1.   



   Geruch: neuartige, steigende Sandelholznote, blumig.



     3-Methyl-5-(2,2-dimethyl-6-methylen-cyclohexyl)-4-penten-   
2-ol, IR(Film): 3450, 1642, 1450, 1380, 1360, 1080,
980, 935, 925, 885   cm-1.   



   Geruch: weiche, haftende Sandelholznote.



   Synthesebeispiel 4
1,3 g Natriumhydridpaste   (55-60 %ig)    wurde zunächst mit Pentan von   Paraffins1    befreit und dann in 50 ml trockenem Dimethylsulfoxid suspendiert. Nach   einstündigem    Riihren bei   70"    entstand eine klare Lösung, zu der nach   Abkiihlen    auf Raumtemperatur 30 ml trockenes Tetrahydrofuran zugegeben wurden. Es wurde auf   0     abgekühlt und jeweils innert 5 Minuten nacheinander mit einer Lösung von 6,1 g Trimethylsulfoniumjodid in 30 ml Dimethylsulfoxid und 4,8 g a-Jonon in 10 ml Dimethylsulfoxid versetzt. Das Gemisch wurde 15 Minuten bei   0     und 75 Minuten bei   35     geriihrt.

  Zur Aufarbeitung wurde mit eiskalter   Ammoniumchloridlbung    behandelt und mit Hexan extrahiert. Der Extrakt wurde neutralgewaschen, getrocknet, eingeengt und lieferte 4,8 g eines gelben Öls, aus dem durch Vakuumdestillation 4,0 g 2-Methyl-1,2oxido-4-(2,6,6-trimethyl-2-cyclohexenyl)-3-buten,   Kp.0,005    =   80 ,    erhalten wurden. IR(Film): 1450, 1380, 1360, 1295, 1205, 1130, 1070,   1060, 980, 965, 905, 895, 820, 808, 775,    740   cm-1.   



   Synthesebeispiel 5
3,1 g 2-Methyl-1,2-oxido-4-(2,6,6-trimethyl-2-cyclo- hexenyl)-3-buten wurden in 30 ml trockenem 1,2-Dimethoxy   pathan    60 Minuten bei   90"    und 1,65 g Lithiumperchlorat ge   rtlhrt.    Die gelbe Lösung wurde mit   Ather      verdiinnt,    mit Wasser gewaschen, getrocknet und unter vermindertem Druck eingeengt. Es wurden 3,1 g   2-Methyl-4-(2,6,6-trimethyl-2    cyclohexenyl)-3-butenal erhalten, Kp.0,15 = 900, nD20 = 1,4880.

 

   Synthesebeispiel 6
In den Synthesebeispielen 4 und 5 analoger Weise wurden folgende Verbindungen hergestellt: 2-Methyl-4-(2,2,6-trimethylcyclohexyl)-3-butenal; IR(Film):
2730, 1730, 1455, 1385, 1375,   1365, 975 cm-1.   



  2-Methyl-4-(2,2-dimethyl-6-methylencyclohexyl)-3-butenal;
IR(Film): 2740, 1730, 1645, 1455, 1385, 1365, 980,
970, 890   cm-1.    



  
 



   The present invention relates to fragrance compositions which, by containing new compounds of the general formula
EMI1.1
 where R1 is hydrogen or methyl and R2 is Cla-alkyl and one of the two dotted lines can be an additional bond, where in the case of cyclohexenyl derivatives R2 cannot be methyl, are indicated.



   The compounds of the formula I have particular odor properties, namely they are characterized by a particularly fine sandalwood note. Such an odor note was previously completely unknown in the ionone series, i.e. in compounds such as those of the formula I. The compounds of the formula I can therefore be used as fragrances. Since sandalwood oil is a very valued and indispensable ingredient in perfumery, which is becoming increasingly scarce and therefore more expensive, there is a great need for suitable substituents. The new compounds are largely able to replace sandalwood oil in perfumery and cosmetics.

  They are suitable for the production of perfume compositions and eaux de cologne, to which they often give a subtle note, in quantities of about 0.1-40 wt. 5S, as well as for perfuming technical and cosmetic products of all kinds such as soaps, solid and liquid Detergents, bath additives, lotions, crimes, powders, deodorants, etc., in weight ratios of 1 ppm to about 6%, although these values can be either exceeded or not exceeded.



   example
Fragrance composition
Parts by weight of a -ionone 400 a-iso-methylionone 200 phenylethyl alcohol 200 d 2-octynoic acid methyl ester (10% in alcohol 95) 40
Pure Rhodinol 20 Geraniums1 Bourbon 20
Heliotropin 20 Ylang-Ylang Oil Extra 20 3-Methyl-5- (2,2,6-trimethyl-cyclohexyl) -4-penten-2-ol 80
1000
The basic composition (violet type) becomes more flowery with the addition of 3-methyl-5- (2,2,6-trimethyl-cyclohexyl) -4-penten-2-ol and has a characteristic sandal note.



   The compounds of the formula I can be prepared by using an aldehyde of the formula
EMI1.2
 where R1 and R2 and the two dotted lines have the meanings given above, with an organometallic compound of the formula A-CH3 or Hal-Al (CH3) 2, in which A is an alkali metal or a radical Hal-Mg- and Hal is chloro Bromine or iodine means, converts and hydrolyzes, it being possible for conversion and hydrolysis to take place in a manner known per se.



   Preferred compounds of the formula I are: 3-methyl-5- (2,2,6-trimethylcyclohexyl) -4-penten-2-ol; 3-methyl-5- (2,2-dimethyl-6-methylenecyclohexyl) -4-pentene-
2-ol and 3-ethyl-5- (2,6,6-trimethyl-2-cyclohexenyl) -4-penten-2-ol; those from the corresponding aldehydes, namely from 2-methyl-4- (2,2,6-trimethylcyclohexyl) -3-butenal; 2-methyl-4- (2,2-dimethyl-6-methylenecyclohexyl) -3-butenal and 2-ethyl-4- (2,6,6-trimethyl-2-cyclohexenyl) -3-butenal prepared in the manner indicated above can be.



   The starting compounds of the formula II are new.



   These aldehydes of the formula II can be prepared by methods known per se, for example by glycidic ester condensation according to Darzens-Erlenmeyer-Claisen from compounds of the formula
EMI1.3
  in which R1 and R2 and the two dotted lines have the meanings given above.



   The conversion to a glycidic ester takes place with a haloacetic acid ester in the presence of an alkaline condensing agent, which is then converted into the free azure by careful hydrolysis and decarboxylated.



   The aldehydes of the formula II can, however, also be prepared by using a ketone of the formula III in a manner known per se (see J. Am. Soc. 84, 3782 [1962]; Tetr.



  Lett. 1963, 169 and J. Am. Soc. 87, 1353 [1965]) with a sulfur compound of the formula
EMI2.1
 to epoxides of the formula
EMI2.2
 where R1 and R2 and the dotted lines have the meanings given above, and these are isomerized by treatment with weak Lewis acids such as LiClO4 in an aprotic solvent, preferably in an ether such as tetrahydrofuran, dioxane or 1,2-dimethoxyithane .



   The following examples illustrate the present invention:
Synthesis example 1
81 g of sodium methylate are added to a mixture of 192 g of α-ionone, 165.4 g of ethyl chloroacetate, 500 mg of phenothiazine and 100 ml of pyridine at -10 to -15 ° C. with exclusion of moisture and atmospheric oxygen of 100 ml of absolute ether, the mixture is stirred for 4 hours at C and, while cooling, 400 ml of 15% methanolic sodium hydroxide solution are added, the mixture is stirred for 1 hour at 10 ° C., cooled to -300 ° C. and adjusted to pH by adding 600 ml of glacial acetic acid set about 4.



  After warming to room temperature, 1 liter of water is added and the mixture is stirred for another 15 minutes (evolution of CO2). Extraction with hexane, washing the organic phase until neutral, drying with anhydrous sodium sulfate and stripping off the solvent under reduced pressure yields 190 g of a thin liquid brown crude product, which is subjected to fractional distillation in vacuo, and 125 g of 2-methyl-4- (2nd , 6,6-trimethyl-2-cyclohexenyl) -3-butenal gives, bp 0.15 = 900, nD20 = 1.4880.



   Synthesis example 2
In a solution of 62 g of 2-methyl-4- (2,6,6-trimethyl-2cyclohexenyl) -3-butenal in 700 ml of ether, a solution of methylmagnesium iodide, prepared from 11 g of magnesium turnings and 76 g of methyl iodide, is added at 100 ml , instilled in 700 ml of absolute anther. The reaction mixture is stirred at 30 for 4 hours and then poured onto an excess of ice-cold ammonium chloride solution.

  It is extracted in the usual way with ether, the extract is washed neutral with water, dried with anhydrous sodium sulfate and 66 g of a yellow, slightly viscous oil are obtained which, after distillation in vacuo, 52 g of 3-methyl-5- (2,6,6- trimethyl-2-cyclohexenyl) -4-penten-2-ol yields, b.p. 008 = 90, nD20 = 1.4890.



   The compound has a very nice, firmly adhering sandalwood odor.



   Synthesis example 3
The following compounds were prepared in a manner analogous to Synthesis Examples 1 and 2: 2-ethyl-4- (2,6,6-trimethyl-2-cyclohexenyl) -3-butenal;
IR (film): 2700, 1730, 1455, 1385, 1365, 980, 830 cm-t.



  3-Ethyl-5- (2,6,6-trimethyl-2-cyclohexenyl) -4-penten-2-ol, b.p. 08 = 82; nD20 = 1.4929; IR (film): 3350, 1460, 1385, 1370, 980 cm-1.



   Odor: Sandela, like sandalwood.



  3-methyl-5- (2,2,6-trimethylcyclohexyl) -4-penten-2-ol,
Bp 0.001 = 63; nD20 = 1.4810; IR (film): 3450, 1450,
1380, 1370, 1360, 1085, 980, 930, 920, 900 cm-1.



   Smell: new, rising sandalwood note, flowery.



     3-methyl-5- (2,2-dimethyl-6-methylenecyclohexyl) -4-pentene-
2-ol, IR (film): 3450, 1642, 1450, 1380, 1360, 1080,
980, 935, 925, 885 cm-1.



   Smell: soft, sticky sandalwood note.



   Synthesis example 4
1.3 g of sodium hydride paste (55-60%) was first freed from paraffins1 with pentane and then suspended in 50 ml of dry dimethyl sulfoxide. After stirring for one hour at 70 ", a clear solution was formed, to which, after cooling to room temperature, 30 ml of dry tetrahydrofuran were added 8 g of a-ionone in 10 ml of dimethyl sulfoxide were added, and the mixture was stirred at 0 for 15 minutes and at 35 for 75 minutes.

  For work-up, it was treated with ice-cold ammonium chloride solution and extracted with hexane. The extract was washed neutral, dried, concentrated and gave 4.8 g of a yellow oil, from which 4.0 g of 2-methyl-1,2oxido-4- (2,6,6-trimethyl-2-cyclohexenyl) - 3-butene, b.p. 0.005 = 80, were obtained. IR (film): 1450, 1380, 1360, 1295, 1205, 1130, 1070, 1060, 980, 965, 905, 895, 820, 808, 775, 740 cm-1.



   Synthesis example 5
3.1 g of 2-methyl-1,2-oxido-4- (2,6,6-trimethyl-2-cyclohexenyl) -3-butene were in 30 ml of dry 1,2-dimethoxy pathane for 60 minutes at 90 "and 1.65 g of lithium perchlorate were stirred. The yellow solution was diluted with ether, washed with water, dried and concentrated under reduced pressure. 3.1 g of 2-methyl-4- (2,6,6-trimethyl- 2 cyclohexenyl) -3-butenal obtained, bp 0.15 = 900, nD20 = 1.4880.

 

   Synthesis example 6
The following compounds were prepared in an analogous manner in Synthesis Examples 4 and 5: 2-methyl-4- (2,2,6-trimethylcyclohexyl) -3-butenal; IR (film):
2730, 1730, 1455, 1385, 1375, 1365, 975 cm-1.



  2-methyl-4- (2,2-dimethyl-6-methylenecyclohexyl) -3-butenal;
IR (film): 2740, 1730, 1645, 1455, 1385, 1365, 980,
970, 890 cm-1.

 

Claims (1)

PATENTANSPRUCH PATENT CLAIM Riechstoffkompositionen, gekennzeichnet durch einen Gehalt an einer Verbindung der Formel EMI3.1 worin R1 Wasserstoff oder Methyl und R2 C4-Alkyl bedeuten und eine der beiden punktiert gezeichneten Linien eine zusätzliche Bindung sein kann, wobei im Falle von Cyclohexenylderivaten R2 nicht Methyl sein kann. Fragrance compositions, characterized in that they contain a compound of the formula EMI3.1 where R1 is hydrogen or methyl and R2 is C4-alkyl and one of the two dotted lines can be an additional bond, where in the case of cyclohexenyl derivatives R2 cannot be methyl. UNTERANSPRUCH Komposition gemiss Patentanspruch, gekennzeichnet durch einen Gehalt an 3-Methyl-5-(2,2,6-trimethylcyclohexyl) -4-penten-2-ol. SUBClaim Composition according to claim, characterized by a content of 3-methyl-5- (2,2,6-trimethylcyclohexyl) -4-penten-2-ol.
CH1634476A 1975-03-26 1975-03-26 4-Penten-2-ol derivs. of ionone series - prepd. from aldehydes and used as sandalwood oil substitutes in perfumery and cosmetics CH590059A5 (en)

Priority Applications (1)

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CH1634476A CH590059A5 (en) 1975-03-26 1975-03-26 4-Penten-2-ol derivs. of ionone series - prepd. from aldehydes and used as sandalwood oil substitutes in perfumery and cosmetics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1634476A CH590059A5 (en) 1975-03-26 1975-03-26 4-Penten-2-ol derivs. of ionone series - prepd. from aldehydes and used as sandalwood oil substitutes in perfumery and cosmetics

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CH590059A5 true CH590059A5 (en) 1977-07-29

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CH1634476A CH590059A5 (en) 1975-03-26 1975-03-26 4-Penten-2-ol derivs. of ionone series - prepd. from aldehydes and used as sandalwood oil substitutes in perfumery and cosmetics

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