EP3464258A1 - Tetrahydropyranylniederalkylester und deren herstellung mittels einer ketenverbindung - Google Patents
Tetrahydropyranylniederalkylester und deren herstellung mittels einer ketenverbindungInfo
- Publication number
- EP3464258A1 EP3464258A1 EP17727194.7A EP17727194A EP3464258A1 EP 3464258 A1 EP3464258 A1 EP 3464258A1 EP 17727194 A EP17727194 A EP 17727194A EP 3464258 A1 EP3464258 A1 EP 3464258A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- formula
- compounds
- hydrogen
- methyl
- alkyl
- 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.)
- Pending
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D309/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings
- C07D309/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
- C07D309/08—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D309/10—Oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/74—Benzo[b]pyrans, hydrogenated in the carbocyclic ring
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, 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
- C11B9/00—Essential oils; Perfumes
- C11B9/0042—Essential oils; Perfumes compounds containing condensed hydrocarbon rings
- C11B9/0046—Essential oils; Perfumes compounds containing condensed hydrocarbon rings containing only two condensed rings
- C11B9/0049—Essential oils; Perfumes compounds containing condensed hydrocarbon rings containing only two condensed rings the condensed rings sharing two common C atoms
- C11B9/0053—Essential oils; Perfumes compounds containing condensed hydrocarbon rings containing only two condensed rings the condensed rings sharing two common C atoms both rings being six-membered
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, 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
- C11B9/00—Essential oils; Perfumes
- C11B9/0061—Essential oils; Perfumes compounds containing a six-membered aromatic ring not condensed with another ring
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, 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
- C11B9/00—Essential oils; Perfumes
- C11B9/0069—Heterocyclic compounds
- C11B9/0073—Heterocyclic compounds containing only O or S as heteroatoms
- C11B9/008—Heterocyclic compounds containing only O or S as heteroatoms the hetero rings containing six atoms
Definitions
- the present invention relates to Tetrahydropyranylniederalkylester and especially tetrahydropyranyl, a process for their preparation using ketene and their use as fragrances and flavorings.
- EP 0949239 A1 describes a process for the preparation of linalyl acetate by reacting linalool with ketene in the presence of a zinc salt as catalyst.
- EP 0383446 A2 describes the synthesis and the olfactory properties of a large number of different 2,4,4-trisubstituted tetrahydropyranyl esters (X.1) in which R 'is methyl or ethyl and R "is straight-chain or branched C 2 -C 4 -alkyl or C2-C 4 alkenyl stands. purpose, first 3-methylbut-3-en-1-ol is reacted with an aldehyde of formula R "-CHO in the presence of an acid catalyst, wherein a reaction mixture is obtained which is at least a 2-substituted 4-hydroxy-4-methyltetrahydropyran of the general formula (X.2) contains:
- the intermediate (X.2) is then subjected to acylation by reaction with a carboxylic acid anhydride under acidic conditions.
- 4-Hydroxy-tetrahydropyran compounds and especially 2-substituted 4-hydroxy-4-methyl-tetrahydropyrans are also valuable compounds for use as aroma chemicals, and the skilled person are various methods for their preparation known, for example, from EP 1493737 A1, WO 201 1/147919, WO 2010/133473, WO 201 1/154330 and WO 2014/060345.
- the non-prepublished WO 2016/139338 describes a process for preparing tetrahydropyranyl esters from the corresponding 4-hydroxytetrahydropyran compounds by reaction with a ketene compound.
- these new tetrahydropy ranyl acetate compounds can be prepared by reacting the corresponding alcohol precursors with ketene in a simple manner with very high yields and at the same time in high purity.
- ketene a simple manner with very high yields and at the same time in high purity.
- tetrahydropyranyl acetates having a higher purity and thus a better perfume quality than processes known from the prior art.
- This is surprising in view of the high reactivity of the ketenes used.
- starting materials which can themselves be used as an odorant are also used to produce odorous substances.
- the invention relates to tetrahydropyranyl lower alkyl esters of the general
- R 1 is hydrogen
- R 2 is unsubstituted or mono- or polysubstituted phenyl, where the substituents are independently selected from C 1 -C 6 -alkyl and C 1 -C 4 -alkoxy,
- R 3 represents hydrogen, Ci-C 6 alkyl or C 3 -C 6 cycloalkyl
- R 4 is hydrogen or methyl
- R 6 is Ci-Cs-alkyl
- R 1 and R 2 together with the atoms to which they are attached form a cyclohexane ring which is unsubstituted or monosubstituted or polysubstituted by methyl.
- Another object of the invention are tetrahydropyranyl acetates of the general
- R 1 is hydrogen
- R 2 is unsubstituted or mono- or polysubstituted phenyl wherein the substituents are selected from Ci-C6 alkyl and Ci-C4-alkoxy, R 3 represents hydrogen, Ci-C 6 alkyl or C 3 -C 6 cycloalkyl .
- R 4 is hydrogen or methyl
- R 1 and R 2 together with the atoms to which they are attached form a cyclohexane ring which is unsubstituted or monosubstituted or polysubstituted by methyl.
- a first preferred embodiment are compounds of the formula ( ⁇ - ⁇ ')
- R 1 is hydrogen
- R 3 is hydrogen or methyl
- R 4 is hydrogen or methyl
- R Ph1 , R Ph2 , R Ph3 , R Ph4 and R Ph5 independently of one another represent hydrogen, C 1 -C 6 -alkyl or C 1 -C 4 -alkoxy,
- R 6 is d-Cs-alkyl.
- a second preferred embodiment is compounds of the formula (IA),
- R 1 is hydrogen
- R 3 is hydrogen or methyl
- R 4 is hydrogen or methyl
- RP 5 are independently selected from hydrogen, d-Ce-alkyl and dC 4 -alkoxy.
- a third preferred embodiment is compounds of the formula (1B)
- R 3 is hydrogen, 6 -alkyl or C 3 -C 6 cycloalkyl
- R 4 is hydrogen
- R 5 is hydrogen or methyl.
- a further subject matter is a process for the preparation of compounds of the formula (I)
- R 1 is hydrogen
- R 2 is unsubstituted or mono- or polysubstituted phenyl, the substituents being selected from C 1 -C 6 -alkyl and C 1 -C 4 -alkoxy,
- R 3 represents hydrogen, Ci-C 6 alkyl or C 3 -C 6 cycloalkyl
- R 4 is hydrogen or methyl
- R 1 and R 2 together with the atoms to which they are attached form a cyclohexane ring which is unsubstituted or monosubstituted or polysubstituted by methyl, in which a) compounds of the formula (Ic)
- a first preferred embodiment is a process for the preparation of compounds of the formula (I-A)
- R 1 is hydrogen
- R 3 is hydrogen or methyl
- R 4 is hydrogen or methyl
- RPh2 ] RPh3 ] RPh4 unc
- RPh5 are independently selected from hydrogen, C 1 -C 6 -alkyl and C 1 -C 4 -alkoxy, in which
- a second preferred embodiment is a process for the preparation of compounds of formula (I-B)
- R 3 represents hydrogen, Ci-C 6 alkyl or C 3 -C 6 cycloalkyl
- R 4 is hydrogen
- R 5 is hydrogen or methyl, in which a) a compound of the formula (I-Ba)
- Another object of the invention is the use of compounds of formula ( ⁇ ) or (I), as defined herein, as Aromachemikalie.
- Another object of the invention are flavoring and / orWstoffzusammen composites containing one or more compounds of formula ( ⁇ ) or (I), as defined herein, optionally at least one further, of the compounds of formula ( ⁇ ) or (I) Aromachemical and
- composition contains at least one component ii) or iii).
- Another object of the invention are perfumed or flavored products containing at least one compound of formula ( ⁇ ) or (I) as defined herein or obtainable by a process as defined herein.
- Another object of the invention is a process for perfuming a product in which one or more compounds of formula ( ⁇ ) or (I) as defined herein or obtainable by a process as defined herein are used.
- tetrahydropyranol denotes tetrahydropyran-4-ols
- tetrahydropyranyl-lower alkyl ester tetrahydropyran-4-yl-acetate
- tetrahydropyran-4-yl-propanoate tetrahydropyran-4-yl - butanoates
- tetrahydropyranyl acetate tetrahydropyran-4-yl-acetate.
- Tetrahydropyranyl lower alkyl esters and tetrahydropyranyl acetates according to the invention are the compounds of the formula (II) and (I).
- tetrahydropyranyl lower alkyl ester tetrahydropyranyl acetate
- compounds of the formula (I) and “compounds of the formula (I)” denote both cis / trans mixtures of any composition and also the pure ones Conformational isomers and all diastereomers and optionally all enantiomers in pure form and racemic and optically active mixtures of E
- the structure of formula (IA.1) includes all isomers (2R, 4R) - (IA.1), (2R, 4S) - (IA.1), (2S, 4R) - (IA.1), ( 2S, 4S) - (IA.1).
- C n -C m indicates the number of carbon atoms which a molecule or a group designated therewith may have
- Ci-C6-alkyl is unbranched and branched saturated hydrocarbon radicals having 1 to 6 carbon atoms.
- C 1 -C 6 -alkyl are, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, (2-methylpropyl), sec-butyl (1-methylpropyl), tert-butyl (1, 1-dimethylethyl), n Pentyl, n-hexyl and the structural isomers thereof.
- Preferred C 1 -C 6 -alkyl are C 1 -C 4 -alkyl.
- Ci-C4-alkoxy is unbranched and branched saturated alkoxy having 1 to 4 carbon atoms.
- C1-C4 alkoxy are, for example, methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy and the structural isomers thereof.
- C 3 -C 6 -cycloalkyl represents cyclic saturated hydrocarbon radicals having 3 to 6 carbon atoms.
- C 3 -C 6 -cycloalkyl are, for example, cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl.
- phenyl is unsubstituted or monosubstituted or polysubstituted, where the substituents are independently selected from C 1 -C 6 -alkyl and C 1 -C 4 -alkoxy.
- substituted phenyl is monosubstituted, disubstituted or trisubstituted.
- lower alkyl stands for C 1 -C 3 -alkyl.
- C 1 -C 3 -alkyl is unbranched and branched saturated hydrocarbon radicals having 1 to 3 carbon atoms.
- C 1 -C 3 -alkyl are, for example, methyl, ethyl, n-propyl, isopropyl, preferred methyl and n-propyl.
- Lower alkyl esters denote the corresponding lower alkylcarboxylic acid esters, ie acetates, propanoates and butanoates.
- R 1 is hydrogen
- R 2 is unsubstituted or mono-, di- or trisubstituted phenyl, where the substituents are independently selected from C 1 -C 6 -alkyl and C 1 -C 4 -alkoxy,
- R 3 represents hydrogen, Ci-C 6 alkyl or C 3 -C 6 cycloalkyl
- R 4 is hydrogen or methyl
- R 6 is methyl or n-propyl
- R 1 and R 2 together with the atoms to which they are attached form a cyclohexane ring which is unsubstituted or monosubstituted or polysubstituted by methyl.
- a preferred embodiment are compounds of the formula (I)
- R 1 is hydrogen
- R 2 is unsubstituted or mono-, di- or trisubstituted phenyl, where the substituents are independently selected from C 1 -C 6 -alkyl and C 1 -C 4 -alkoxy,
- R 3 is hydrogen, C 1 -C 6 -alkyl or C 3 -C 6 -cycloalkyl
- R 4 is hydrogen or methyl
- R 1 and R 2 together with the atoms to which they are attached form a cyclohexane ring which is unsubstituted or monosubstituted or polysubstituted by methyl.
- the subject of a first preferred embodiment are the abovementioned compounds of the formula ( ⁇ - ⁇ ') or (IA).
- R 1 is hydrogen
- R 3 is hydrogen or methyl
- R 4 is hydrogen or methyl
- R Ph1 , R Ph2 , R Ph3 , R Ph4 and R Ph5 are hydrogen and the other radicals R Ph1 , R Ph2 , R Ph3 , R Ph4 and R Ph5 are independently selected under C 1 -C 6 -alkyl and C 1 -C 4 -alkoxy,
- R 6 in formula (IA) is ethyl or n-propyl, preferably n-propyl.
- R 1 is hydrogen
- R 3 is hydrogen or methyl
- R 4 is hydrogen or methyl
- R Ph1 , R Ph2 , R Ph3 , R Ph4 and R Ph5 are hydrogen and the other radicals R Ph1 , R Ph2 , R Ph3 , R Ph4 and R Ph5 are independently selected under methyl and methoxy,
- R 6 in formula (IA) is ethyl or n-propyl, preferably n-propyl.
- the radicals R Ph1 , R Ph2 , R Ph3 , R Ph4 and R Ph5 which are not hydrogen are the same.
- R Ph1 , R Ph2 , R Ph3 , R Ph4 and R Ph5 may have the following meanings:
- R Ph , R Ph2 R Ph3 , R Ph4 and R Ph5 are hydrogen, or
- R Ph2 , R Ph3 R Ph4 and R Ph5 are hydrogen and R Ph1 is methyl, or
- R Ph2 , R Ph3 R Ph4 and R Ph5 are hydrogen and R Ph1 is methoxy, or
- R Ph , R Ph3 R Ph4 and R Ph5 are hydrogen and R Ph2 is methyl, or
- R Ph , R Ph3 R Ph4 and R Ph5 are hydrogen and R Ph2 is methoxy, or
- R Ph , R Ph2 R Ph4 and R Ph5 are hydrogen and R Ph3 is methyl, or
- R Ph , R Ph2 R Ph4 and R Ph5 are hydrogen and R Ph3 is methoxy, or
- R Ph , R Ph3 and R Ph5 are hydrogen and R Ph2 and R Ph4 are methyl; or
- R Ph , R Ph3 and R Ph5 are hydrogen and R Ph2 and R Ph4 are methoxy; or R Ph2 and R Ph4 are hydrogen and R Ph1 , R Ph3 and R Ph5 are methyl; or R Ph2 and R Ph4 are hydrogen and R Ph1 , R Ph3 and R Ph5 are methoxy.
- R 3 is hydrogen
- R 4 is hydrogen
- R Ph1 , R Ph2 , R Ph3 , R Ph4 and R Ph5 are hydrogen and the other radicals R Ph1 , R Ph2 , R Ph3 , R Ph4 and R Ph5 are the same and selected are methyl and methoxy,
- R 6 in formula (IA) is ethyl or n-propyl, preferably n-propyl.
- Particularly preferred compounds of the general formula ( ⁇ - ⁇ ') or (IA) are selected from the compounds of the formulas (IA.1), (IA.2), (IA.3), (IA.4), (IA. 5), (IA.6), (IA.7), (IA.8), (IA.9) and (IA.10), where (IA.1), (IA.2), (IA.3 ), (IA.4), (IA.6) and (IA.10) are especially preferred. Particularly preferred are (I-A.1), (I-A.2), (I-A.3), (I-A.4) and (I-A.6).
- R 4 is particularly preferably hydrogen and R 5 is hydrogen or methyl, in particular methyl.
- R 3 is particularly preferably hydrogen, unbranched C 1 -C 4 -alkyl, branched C 1 -C 4 -alkyl or C 3 -C 4 -cycloalkyl.
- R 3 is C 3 -C 6 -cycloalkyl, particularly preferably C 3 -C 4 -cycloalkyl, particularly preferably cyclopropyl.
- R 3 is hydrogen, unbranched C 1 -C 4 -alkyl, or branched C 1 -C 4 -alkyl.
- R 3 is particularly preferably unbranched C 1 -C 4 -alkyl.
- Particularly preferred compounds of the general formula (IB) are selected from compounds of the formulas (IB.1), (IB.2), (IB.3) and (IB.4), where (IB.4) is particularly preferred ,
- Another object of the invention is a process for the preparation of compounds of formula ( ⁇ ) or (I).
- the compound of the formula ( ⁇ ) wherein R 6 is ethyl or n-propyl, in particular n-propyl is preferably obtained by reacting compound (Ic) with an acid chloride or anhydride.
- the compounds of formula (I) are preferably obtained by reacting compound (Ic) with a ketene.
- Another object of the invention is a process for the preparation of compounds of formula ( ⁇ ) as described above, wherein R 6 is ethyl or n-propyl, in particular n-propyl, in which a ') compounds of the formula (Ic)
- R 1 is hydrogen
- R 2 is unsubstituted or mono- or polysubstituted phenyl wherein the substituents are selected from Ci-C6 alkyl and Ci-C4-alkoxy, R 3 represents hydrogen, Ci-C 6 alkyl or C 3 -C 6 cycloalkyl .
- R 4 is hydrogen or methyl
- R 1 is hydrogen
- R 2 is tolyl
- R 3 is hydrogen
- R 4 is hydrogen
- step c ' optionally subjecting the reaction mixture obtained in step b') to a separation to obtain at least one fraction.
- the compound (Ic) is reacted with butyric acid chloride.
- the esterification can be carried out in the presence of an esterification catalyst.
- esterification catalysts customary catalysts can be used, for.
- mineral acids such as sulfuric acid and phosphoric acid
- organic sulfonic acids such as methanesulfonic acid and p-toluenesulfonic acid
- amphoteric catalysts especially titanium, tin (IV) - or zirconium compounds, such as tetraalkoxytitans, z.
- tetrabutoxytitanium, and tin (IV) oxide As tetrabutoxytitanium, and tin (IV) oxide.
- the esterification catalyst is used in an effective amount, which is usually in the range of 0.05 to 10 wt .-%, preferably 0.1 to 5 wt .-%, based on the sum of acid component (or anhydride) and alcohol component.
- the esterification can usually be carried out at ambient pressure or reduced or elevated pressure. Preferably, the esterification is carried out at ambient or reduced pressure.
- the esterification may be carried out in the absence of an added solvent or in the presence of an organic solvent. If the esterification is carried out in the presence of a solvent, it is preferably an organic solvent which is inert under the reaction conditions. These include, for example, aliphatic hydrocarbons, halogenated aliphatic hydrocarbons, aromatic and substituted aromatic hydrocarbons or ethers.
- the solvent is preferably selected from pentane, hexane, heptane, ligroin, petroleum ether, cyclohexane, dichloromethane, trichloromethane, carbon tetrachloride, benzene, toluene, xylene, chlorobenzene, dichlorobenzenes, dibutyl ether, THF, dioxane and mixtures thereof.
- the esterification is usually carried out in a temperature range of 0 to 200 ° C, preferably 10 to 150 ° C.
- the esterification can take place in the absence or in the presence of an inert gas.
- An inert gas is generally understood to mean a gas which, under the given reaction conditions, does not react with the starting materials, reagents, solvents or the products formed. These include z. As nitrogen or argon.
- the esterification can be carried out by addition of bases capable of intercepting HX-released acid in the reaction.
- bases are especially tertiary amines.
- 4- (dimethylamino) pyridine can be used as the esterification catalyst.
- Suitable amines are trimethylamine, triethylamine, tripropylamine, tributylamine, N, N-diisopropylethylamine, ⁇ , ⁇ -dimethylethylamine, N, N-dimethylisopropylamine, N-methylmorpholine, N-methylpiperidine, N-methylpyrrolidine, or mixtures thereof.
- the solvent can simultaneously serve as a catalyst and as a base.
- pyridine serves as a solvent, catalyst and base simultaneously.
- the ketene (K) is preferably produced by high-temperature pyrolysis of acetone or acetic acid at temperatures which are generally higher than 650.degree.
- the temperature for producing the ketene (K) is preferably in the range from 650 to 1000 ° C., more preferably from 700 to 900 ° C.
- the ketene (K) is prepared under reduced pressure.
- the pressure is preferably in a range from about 100 to 900 mbar, particularly preferably from 300 to 500 mbar, in particular from 350 to 450 mbar.
- the ketene (K) is prepared under ambient pressure ("depressurized").
- the pressure is then in a range of about 950 to
- the ketene compound (K) is an extremely reactive compound which is highly prone to dimerization with the formation of diketenes, in the process of the present invention, it is preferable to use a ketene compound which has been prepared only recently.
- the process according to the invention is particularly advantageous when using ketene (K) which has been prepared immediately before the reaction in the process according to the invention, for example by thermal cleavage of acetone, acetic acid or acetic anhydride.
- the ketene (K) is introduced into the reaction mixture below the liquid surface, so that it bubbled through the reaction mixture.
- the ketene is passed under intensive stirring into the reaction mixture, so that essentially no ketene in larger amounts into the gas phase.
- the pressure of the ketene (K) must be sufficiently high to overcome the hydrostatic pressure of the reaction mixture above the ketene feed, possibly assisted by an inert gas stream, for example nitrogen.
- the ketene (K) can be fed by any suitable means. Important are a good distribution and a fast mixing. Gassing lances, for example, which can be permanently installed, or preferably nozzles, are suitable.
- the nozzles may be provided at or near the reactor bottom.
- the nozzles can be formed as openings of a hollow chamber surrounding the reactor. Preferably, however, immersion nozzles are used with suitable leads.
- a plurality of nozzles may be arranged in the form of a ring.
- the nozzles may face up or down.
- the nozzles are preferably inclined downwards.
- the ketene (K) is prepared under reduced pressure and reacted under reduced pressure with at least one tetrahydropyran-4-ol of the general formula (Ic).
- the pressure during the preparation and the reaction of the ketene (K) is preferably in a range from about 100 to 900 mbar, particularly preferably from 300 to 500 mbar, in particular from 350 to 450 mbar.
- the reaction of tetrahydropyran-4-ol compounds of the formula (Ic) with the ketene compound (K) is preferably carried out in such a way that accumulation of the ketene compound in the reaction mixture is avoided at any time during the reaction.
- the reaction of the compounds of the formula (Ic) with the ketene (K) is preferably carried out in such a manner that ketenes are introduced into the reaction mixture until the compounds of the formula (Ic) have been substantially completely reacted.
- substantially reacted is meant a conversion of at least 95%, preferably of at least 98%, and particularly preferably of at least 99%.
- reaction of compounds of the general formula (Ic) with the ketene (K) takes place in the absence of an added catalyst.
- reaction of compounds of general formula (Ic) with the ketene (K) in the presence of a catalyst which is preferably selected from zinc salts.
- the catalyst used is particularly preferably a zinc salt of a carboxylic acid, especially a monocarboxylic acid having 1 to 18 carbon atoms or dicarboxylic acid having 2 to 18 carbon atoms.
- a carboxylic acid especially a monocarboxylic acid having 1 to 18 carbon atoms or dicarboxylic acid having 2 to 18 carbon atoms.
- These include, for example, zinc formate, zinc acetate, zinc propionate, zinc butyrate, zinc stearate, zinc succinate or zinc oxalate.
- zinc acetate It is very advantageous in the process according to the invention that the catalysts generally only have to be used in very small amounts, which makes the process more cost-effective and facilitates the work-up of the reaction mixture. This applies in particular to the use of a zinc salt as a catalyst.
- the catalyst is preferably used in an amount of from 0.01 to 2% by weight, particularly preferably from 0.02 to 0.5% by weight, based on the total amount of compounds of the formula (Ic).
- reaction vessel which as essential ingredients a good stirring and / or mixing device, a dosing device for ketene, a heater for starting the reaction and to maintain the Reaction temperature during the post-reaction, a cooling device for removing the heat of reaction of the exothermic reaction and a vacuum pump contains.
- ketene is added so that it is never present in excess in the reaction mixture, and that the reaction mixture is always well mixed.
- ketene succeeds, for example, by IR spectroscopy on the characteristic carbonyl.
- IR spectroscopy on the characteristic carbonyl.
- compositions according to the invention and the compositions obtainable by the process according to the invention are particularly advantageously suitable as fragrance or to provide a fragrance.
- a first preferred embodiment of the process according to the invention is a process for the preparation of compounds of formula (I-A), as described above, in which
- step b) according to the invention proceeds as described above.
- the reaction of compounds of formula (I-Ac) to compounds of formula (I-A) proceeds analogously to the reaction of compounds of formula (Ic) to compounds of formula (I).
- step a) of the synthesis of compounds of the formula (I-Ac) can be carried out by the processes known to the person skilled in the art, which are described, for example, in WO 201/154330, WO 2010/133473 and EP 1493737.
- the alcohol and the aldehyde are preferably used in step a) in a molar ratio of about 1 to 2 to 2 to 1, more preferably from 0.7 to 1 to 2 to 1, in particular from 1 to 1 to 2 to 1.
- the alcohol and the aldehyde are used in a molar ratio of 1: 1 to 1.5: 1 in step a).
- the reaction in step a) takes place in the presence of an acidic catalyst.
- any acidic catalyst can be used for the reaction in step a), ie. H. Any substance that has Brönstedt or Lewis acidity.
- suitable catalysts are protic acids such as hydrochloric acid, sulfuric acid, potassium hydrogensulfate, phosphoric acid, methanesulfonic acid and p-toluenesulfonic acid, acidic molecular element compounds such as boron trifluoride, zinc chloride, oxidic acidic solids such as zeolites, silicates, aluminates, aluminosilicates, clays and acidic nenleyer.
- the acid catalyst used in step a) is preferably selected from hydrochloric acid, sulfuric acid, methanesulfonic acid, p-toluenesulfonic acid and strongly acidic cation exchangers.
- the reaction in step a) is carried out in the presence of a Bronsted acid, which is preferably selected from hydrochloric acid, sulfuric acid, methanesulfonic acid, p-toluenesulfonic acid.
- a solvent can be used in step a), which is preferably selected from hydrocarbons and hydrocarbon mixtures. Suitable solvents are, for example, hexane, heptane, ligroin, petroleum ether, cyclohexane, decalin, toluene, xylene and mixtures thereof. Preferably, no solvent is used.
- the catalyst is preferably used in this first variant in an amount of 0.05 to 5 mol%, particularly preferably from 0.1 to 4 mol%, based on the aldehyde.
- the reaction in step a) according to this first variant preferably takes place at a temperature in the range from 20 to 120 ° C., particularly preferably from 30 to 80 ° C.
- the reaction in step a) takes place in the presence of a strongly acidic cation exchanger.
- the term strongly acidic cation exchanger is understood to mean a cation exchanger in the H + form which has strongly acidic groups.
- the strongly acidic groups are usually sulfonic acid groups.
- the acidic groups are usually attached to a polymer matrix, the z. B. may be gel or macroporous.
- a preferred embodiment of the method according to the invention is accordingly characterized net, that one uses a strongly acidic, sulfonic acid-containing cation exchanger. Suitable strong acid cation exchangers are in the
- Suitable for use in step a) are strongly acidic ion exchangers (such as Amberlyst®, Amberlite®, Dowex®, Lewatit®, Purolite®, Serdolit®) which are based on polystyrene and the copolymers of styrene and divinylbenzene as a carrier matrix with sulfonic acid groups in H + form and with sulfonic acid groups (-SO3H) functionalized ion exchange groups.
- the ion exchangers differ in the structure of their polymer frameworks, and there are different gel-and macroporous resins.
- a perfluorinated polymeric ion exchange resin is used in step a). Such resins are z. B. under the name Nafion ® sold by DuPont. An example of such a perfluorinated polymeric ion exchange resin is Nafion® NR-50.
- Suitable commercially available strong acid cation exchangers suitable for the reaction in step a) are, for example, under the trade names Lewatit® (Lanxess), Purolite® (The Purolite Company), Dowex® (Dow Chemical Company), Amberlite® (Rohm and Haas Company), Amberlyst ® (Rohm and Haas Company).
- Preferred strongly acidic cation exchangers are: Lewatit® K 1221, Lewatit® K 1461, Lewatit® K 2431, Lewatit® K 2620, Lewatit® K 2621, Lewatit® K 2629, Lewatit® K 2649, Amberlite® FPC 22, Amberlite® FPC 23 , Amberlite® IR 120, Amberlyst® 131, Amberlyst® 15, Amberlyst® 31, Amberlyst® 35, Amberlyst® 36, Amberlyst® 39, Amberlyst® 46, Amberlyst® 70, Purolite® SGC650, Purolite® C100H, Purolite® C150H, Dowex® 50X8, Serdolit® red and Nafion® NR-50.
- the strongly acidic ion exchange resins are usually regenerated with hydrochloric acid and / or sulfuric acid.
- step a) the alcohol and the aldehyde are reacted in the presence of a strongly acidic cation exchanger and in the presence of water.
- water is additionally added to the reaction mixture in addition to the alcohol and the aldehyde.
- the starting materials are reacted in the presence of at least 25 mol%, preferably of at least 50 mol% of water.
- the starting materials in the presence of 25 to 150 mol%, preferably from 40 to 150 mol%, particularly preferably from 50 to 140 mol%, in particular of 50 converted to 80 mol% of water.
- the amount of water used on the amount of substance of the starting material optionally used in deficiency or in the case of an equimolar conversion to the amount of one of the two.
- the reaction is carried out in the presence of about at least 3 wt .-%, particularly preferably of at least 5 wt .-% of added water.
- the alcohol and the aldehyde are reacted, for example, in the presence of 3% by weight to 15% by weight of water, preferably from 5% by weight to 12% by weight of water.
- the stated above% by weight are based on the total amount of the reaction mixture, consisting of the components alcohol and aldehyde and water.
- the amount of water can be chosen freely and is limited, if at all, only by procedural or economic aspects and can certainly be used in large, for example in 5- to 15-fold excess or even above.
- a mixture of alcohol and aldehyde is prepared with the amount of water to be added so that the added water remains dissolved in the mixture of the alcohol and the aldehyde, i. H. there is no two-phase system.
- step a For reacting the alcohol with the aldehyde in step a), it is possible to bring the abovementioned starting materials and optionally added water into contact with the acidic cation exchanger.
- alcohol, aldehyde and optionally the added water are used in the form of a mixture in step a).
- the stated starting materials can be brought into contact or mixed with one another in any order.
- the amount of strongly acidic cation exchanger in step a) is not critical and can be chosen freely within wide limits, taking into account the economic and procedural aspect. Accordingly, the reaction can be carried out both in the presence of catalytic amounts and in the presence of large excesses of the strongly acidic cation exchanger.
- the strongly acidic cation exchanger is usually employed in an amount of about 5 to about 40% by weight, preferably in an amount of about 10 to about 40% by weight and more preferably in an amount of about 10 to about 30% by weight. %, in each case based on the sum of alcohol and aldehyde used.
- the data refer to the ready-to-use cation exchanger, which is usually pretreated with water and accordingly amounts of up to about 70 wt .-%, preferably from about 30 to about 65 wt .-% and particularly preferably from about 40 to about 65% by weight of water may include.
- the ready-to-use cation exchanger which is usually pretreated with water and accordingly amounts of up to about 70 wt .-%, preferably from about 30 to about 65 wt .-% and particularly preferably from about 40 to about 65% by weight of water may include.
- the abovementioned strongly acidic cation exchangers can be used in step a) both individually or else in the form of mixtures.
- the catalyst loading is for example in the range of 50 to 2500 mol per m 3 of catalyst and h, preferably in the range of 100 to 2000 mol per m 3 of catalyst and h, in particular in the range of 130 to 1700 mol per m 3 of catalyst and h , Where the molar amount in mol refers to the starting material I-Ab or I-Ba.
- the reaction in step a) in the presence of a strongly acidic cation exchanger can optionally also be carried out in the presence of a solvent which is inert under the reaction conditions.
- Suitable solvents are, for example, tert-butyl methyl ether, cyclohexane, decalin, hexane, heptane, ligroin, petroleum ether, toluene or xylene.
- the solvents mentioned can be used alone or in the form of mixtures with one another.
- the reaction in step a) is preferably carried out in the presence of a strongly acidic cation exchanger without addition of an organic solvent.
- the reaction in step a) can be carried out batchwise or continuously.
- the reaction can be carried out by initially introducing a mixture of the alcohol, the aldehyde, optionally water and optionally an organic solvent in a suitable reaction vessel and adding the acidic catalyst. After completion of the reaction, the catalyst can then be separated off from the resultant reaction mixture by suitable separation processes.
- the order of contacting the individual reaction components is not critical and can be varied according to the respective process engineering embodiment.
- step a) a Bronsted acid, which is preferably selected from hydrochloric acid, sulfuric acid, methanesulfonic acid, p-toluenesulfonic acid, is used as the catalyst
- the separation of the Catalyst z. B. be carried out by distillation after aqueous workup or carried out directly by distillation. If a strongly acidic cation exchanger is used as the catalyst in step a), the separation of the catalyst can be carried out, for example. By filtration or by centrifugation.
- the reaction of the alcohol with the aldehyde in step a) is carried out continuously.
- a mixture of the starting materials alcohol and aldehyde to be reacted with water can be prepared for this purpose and this mixture continuously brought into contact with a strongly acidic cation exchanger.
- the selected cation exchanger can be introduced, for example, into a suitable flow reactor, for example a stirred reactor with inlet and outlet or a tubular reactor, and the starting materials and the water are continuously introduced into the latter and the reaction mixture is discharged continuously.
- the starting materials and the water can optionally be added as individual components or in the form of a mixture as described above in the flow reactor. Corresponding methods are described in the European patent applications EP 13165767.8 and
- a second preferred embodiment of the process according to the invention is a process for the preparation of compounds of the formula (I-B) as described above, in which
- step b) according to the invention proceeds as described above.
- the reaction of compounds of the formula (I-Bc) to give compounds of the formula (I-B) proceeds analogously to the reaction of compound of the formula (Ic) to give compounds of the formula (I).
- the reaction takes place without the addition of an external solvent.
- the reaction preferably takes place at a temperature in the range from 20 to 120.degree. C., in particular from 30 to 80.degree.
- the reaction preferably takes place using a cationic ion exchanger.
- the reaction is particularly preferably carried out using a cationic ion exchanger without addition of an external organic solvent and at a temperature in the range from 0 to 70.degree. C., preferably from 20 to 70.degree. C. and in particular from 20 to 60.degree.
- compounds of the formula (I-Bb.1) are used as compound (I-Bb) in a preferred process.
- R 4 is W
- the compounds of the formula (I-Bb.1) are commercially available and known by the common name isopulegol.
- (-) - isopulegol ((1R, 2S, 5R) -2-isopropenyl-5-methylcyclohexanol) can be used.
- the compounds of the formula ( ⁇ ) or (I) are suitable as aroma chemicals.
- Preferred compounds of the formula ( ⁇ ) or (I) are those mentioned above.
- the compounds of the formula (I) or (I) according to the invention and the compounds of the formula (I) or (I) obtainable by the process according to the invention are suitable on account of their advantageous odor properties. They are particularly advantageous as fragrances, for the provision of fragrances, as flavorings and / or for the provision of perfumed or flavored products. Preferred compounds of the formula ( ⁇ ) or (I) are those mentioned above.
- the compounds of general formula (II) or (I) can be used isomerically pure or as a mixture of isomers. If the compounds of the formulas ( ⁇ ) or (I) are employed as mixture of isomers, the proportion of each isomer contained in the mixture is in each case at least 1% by weight, preferably at least 2% by weight, in particular at least 2.5% by weight. -%, Based on the total weight of the compounds of formula ( ⁇ ) or (I).
- compositions which are selected from perfumes, detergents and cleaners, cosmetic agents, personal care products, hygiene articles, products for oral and dental hygiene, fragrance dispensers, fragrances and pharmaceutical agents.
- a preferred object of the invention is the use of the compound of formula (I-A.1) as Aromachemikalie.
- the odor of the compound of formula (I-A.1) can be described as green (int 4) and dill (int 4).
- this mixture has an isomer mixture of compounds of the formula (I-A.1), preferably a cis-trans mixture of (cis) - (I-A.I) and (trans) - (I-A.I).
- the use of compounds of the formula (I-A.1) for producing a fragrance with a green and / or dill note is particularly preferred.
- the odor of green (int.4) and dill (int.4) is especially indicated by a mixture of compounds of the formulas (2R, 4R) - (IA.1), (2S, 4S) - (IA.1), (2R , 4S) - (IA.1) and (2S, 4R) - (IA.1), specifically the ratio of compounds of the formulas (2R, 4R) - (IA.1) and (2S, 4S) - ( IA.1) to compounds of the formulas (2R, 4S) - (IA.1) and (2S, 4R) - (IA.1) in the range from 1: 2 to 1: 1 and preferably in the range from 1: 1, 6 to 1: 1.
- a preferred subject of the invention is the use of the compound of formula (IA.2) as aroma chemical.
- the odor of the compound of formula (I-A.2) can be described as flowery, grape hyacinth (int.3), sweet (int.3) and coumarin (int2); the intensity can be described as 2-3.
- this mixture has an isomer mixture of compounds of the formula (I-A.2), preferably a cis-trans mixture of (cis) - (I-A.2) and (trans) - (I-A.2).
- the use of compounds of the formula (I-A.2) for producing a fragrance with a note of flowery and / or grape hyacinth and / or sweet and / or coumarin is particularly preferred.
- a preferred subject of the invention is the use of the compound of formula (I-A.3) as Aromachemikalie.
- the odor of the compound of formula (I-A.3) can be described as phenolic, leather and technical; the intensity can be described as 3.
- this mixture has an isomer mixture of compounds of the formula (I-A.3), preferably a cis-trans mixture of (cis) - (I-A.3) and (trans) - (I-A.3).
- the use of compounds of the formula (I-A.3) for the production of a fragrance with a phenolic and / or leather grade and / or technical is particularly preferred.
- a preferred subject of the invention is the use of the compound of formula (I-A.4) as Aromachemikalie.
- the odor of the compound of formula (I-A.4) can be described as cresol and technical; the intensity can be described as 3.
- this mixture has an isomer mixture of compounds of the formula (I-A.4), preferably a cis-trans mixture of (cis) - (I-A.4) and (trans) - (I-A.4).
- the use of compounds of the formula (I-A.4) for producing a fragrance with a cresol and / or technical grade is particularly preferred.
- a preferred subject of the invention is the use of the compound of formula (IA.6) as Aromachemikalie.
- the odor of the compound of formula (IA.6) can be described as flowery (int.2), honey (int.2) and iris (int.2); the intensity can be described as 1 - 2.
- This odor in particular comprises an isomer mixture of compounds of the formula (IA.6), preferably a cis-trans mixture of (cis) - (IA.6) and (trans) - (IA.6) in which the cis-trans Isomer enriched present.
- Particularly preferred is thus the Use of compounds of the formula (IA.6) for producing a fragrance with a note of flowery and / or honey and / or iris.
- a preferred subject of the invention is the use of the compound of formula (I-A.7) as Aromachemikalie.
- the odor of the compound of the formula (I-A.7) can be described as lilies of the valley (int.1), cresol / smoke (int.2) and / or technically (int.2).
- this mixture has an isomer mixture of compounds of the formula (I-A.7), preferably a cis-trans mixture of (cis) - (I-A.7) and (trans) - (I-A.7).
- the use of compounds of the formula (I-A.7) for producing a fragrance with a note of lily of the valley and / or cresol / smoke and / or technical is particularly preferred.
- a preferred subject of the invention is the use of the compound of formula (I-A.8) as aroma chemical.
- the odor of the compound of formula (I-A.8) can be described as a solvent (int.3), rubber (int.4) and / or hot angle grinder.
- this mixture has an isomer mixture of compounds of the formula (I-A.8), preferably a cis-trans mixture of (cis) - (I-A.8) and (trans) - (I-A.8).
- the use of compounds of the formula (I-A.8) for producing a fragrance with a touch of solvent and / or rubber and / or hot angle grinder is particularly preferred.
- a preferred subject of the invention is the use of the compound of formula (I-A.10) as an aroma chemical.
- the odor of the compound of the formula (I-A.10) can be described as natural, green, herbaceous, pertinent, cumin, fresh.
- This odor in particular comprises an isomer mixture of compounds of the formula (IA.10), preferably a cis-trans mixture of (cis) - (IA.10) and (trans) - (IA.IO), in which the cis-trans Isomer enriched present.
- the use of compounds of the formula (I-A.10) for producing a fragrance with a note of natural, green, herbaceous, spearmint, cumin and / or fresh is particularly preferred.
- Cis-enriched in the specification of the application designates a cis-trans ratio of at least 60:40, preferably at least 70:30.
- Another object of the invention are flavoring and perfume compositions containing i) at least one compound of the formula ( ⁇ ) or (I) as defined herein, or at least one compound of the formula ( ⁇ ) or (I) obtainable in a process herein defined,
- composition contains at least one component ii) or iii).
- Preferred compounds of the formula ( ⁇ ) or (I) are those mentioned above.
- Particular preferred compounds are those mentioned above.
- the preferred compounds of the formula ( ⁇ ) or (I) are those mentioned above.
- Particular preferred compounds are those mentioned above.
- compositions according to the invention can be diluted as desired for use as a fragrance with at least one solvent customary in this field of application.
- suitable solvents are: ethanol, dipropylene glycol or its ethers, phthalates, propylene glycols or carbonates of diols, preferably ethanol.
- Water is also suitable as a solvent for diluting the perfume compositions according to the invention and can advantageously be used together with suitable emulsifiers.
- the compounds of the formula (I) or (I) according to the invention and the compounds of the formula (I) or (I) obtainable by the process according to the invention have high stability and durability.
- Another object of the invention are perfumed or flavored products, which are preferably selected from perfumes, detergents and cleaners, cosmetics, personal care products, hygiene articles, oral hygiene products, fragrance dispensers, fragrances and pharmaceutical agents containing at least one compound of the invention of the formula (I) or (I) and / or at least one obtainable by the process according to the invention compound of formula ( ⁇ ) or (I).
- Preferred compounds of the formula ( ⁇ ) or (I) are those mentioned above.
- an organoleptically effective amount as in the context of the entire present invention, is to be understood in particular as meaning an amount which, when properly used, is sufficient to cause the consumer or consumer to have a scent impression.
- cosmetic compositions all the usual cosmetic compositions are suitable. These are preferably perfume, Eau de Toilette, deodorants, soap, shower gel, bath gel, creams, lotions, sunscreens, compositions for cleaning and hair care, such as hair shampoo, conditioner, hair gel, hair fixative in the form of liquids or foams and more Cleaning or care preparations for the hair, compositions for decorative use on the human body, such as cosmetic pencils, for example lipsticks, lip care pens, concealers, cheek blushers, eyeshadow pencils, lip pencils, eye contour pencils, eyebrow pencils, correction pencils, sun protection pencils, Anti-acne pens and similar products as well as nail polishes and other nail care products.
- cosmetic pencils for example lipsticks, lip care pens, concealers, cheek blushers, eyeshadow pencils, lip pencils, eye contour pencils, eyebrow pencils, correction pencils, sun protection pencils, Anti-acne pens and similar products as well as nail polishes and other nail care products.
- the compounds of the formula (I) or (I) according to the invention and / or the compounds of the formula (I) obtainable by the process according to the invention are particularly suitable for use in perfumes, for.
- perfumes for.
- Eau de Toilette, shower gels, bath gels and body deodorants As Eau de Toilette, shower gels, bath gels and body deodorants.
- consumer goods or consumer goods are: air-deodorants (air care), cleaning or care products for textiles (especially detergents, fabric softeners), textile treatment agents such as ironing aids, cleaning agents, cleaning agents, care products for the treatment of surfaces, such as furniture, floors, kitchen equipment, glass - Washers and windows and screens, bleaching, toilet blocks, descaling agents, fertilizers, building materials, mold removers, disinfectants, car care products and the like.
- air-deodorants air care
- cleaning or care products for textiles especially detergents, fabric softeners
- textile treatment agents such as ironing aids, cleaning agents, cleaning agents, care products for the treatment of surfaces, such as furniture, floors, kitchen equipment, glass - Washers and windows and screens, bleaching, toilet blocks, descaling agents, fertilizers, building materials, mold removers, disinfectants, car care products and the like.
- bleaching toilet blocks
- descaling agents fertilizers, building materials, mold removers, disinfectants, car care products and the like.
- Another object of the invention are methods for perfuming, in particular for lending and / or enhancing an odor or taste, of a product in which at least one compound of formula ( ⁇ ) or (I) is used.
- Preferred compounds of the formula ( ⁇ ) or (I) are those mentioned above.
- the compound of formula (I-A.1) is used to impart or enhance a product of green and / or dill.
- the compound of formula (I-A.2) is used to impart or enhance a product of flowery and / or grape hyacinth and / or sweet and / or coumarin.
- the compound of formula (I-A.3) is used to impart or enhance a phenolic and / or leather grade and / or technically to a product.
- the compound of formula (I-A.4) is used to give or enhance technically a grade of cresol and / or technically.
- the compound of formula (I-A.6) is used to impart or enhance a product of flowery and / or honey and / or iris.
- the compound of formula (IA.7) is used to give or enhance technically a touch of lily of the valley and / or cresol / smoke and / or.
- the compound of formula (IA.8) is used to impart or enhance a grade of solvent, and / or gum and / or hot angle grinder to a product.
- the compound of formula (IA.10) is used to impart or enhance a natural, green, herbaceous, spearmint, cumin and / or fresh note to a product.
- Amberlyst® 131 Acid ion exchange resin from Rohm and Haas
- Isopulegol 2-isopropenyl-5-methylcyclohexanol
- Method A Start at 50 ° C, then at 3 ° C / min to 170 ° C, then at 20 ° C / min to 230 ° C
- Method B Start 60 ° C, then at 2 ° C / min to 120 ° C , then at 20 ° C / min to 230 ° C
- Method C Start 80 ° C, then at 2 ° C / min to 140 ° C, then at 20 ° C / min to 230 ° C.
- the smell of the respective substances was evaluated on a smelling strip. If indicated, the intensity is between 1 (very weak) and 6 (very strong).
- the product can be purified by fractional distillation (head temperature 106 to 130 ° C at 3 mbar). cis -tetrahydro-4-methyl-2-phenyl-pyranol, cis- (1-Ac.1)
- Tetrahydro-4-methyl-2-phenyl-pyranol (as a cis / trans mixture, 10.3 g, 53.5 mmol) was initially charged in 80 ml of toluene at 60 ° C. Keten was obtained by pyrolysis of acetone at 700 ° C and the pyrolysis gas stream passed through the reaction mixture with vigorous stirring for 8 h. Sales were> 98%. It was then allowed to cool and the solvent removed on a rotary evaporator.
- the crude product was purified by column chromatography (cyclohexane with 0 to 20% ethyl acetate in 30 min). The product was obtained in 96% purity as a mixture of two diastereomers with a cis: trans ratio of 1.4: 1.
- Odor green (Int 4), dill (Int 4) cis-Tetrahydro-4-methyl-2-phenyl-pyranylacetate, cis- (IA.I)
- Example 2 The preparation was carried out analogously to Example 1. The product was obtained after column chromatography (cyclohexane / ethyl acetate) in 86% purity as a cis / trans mixture with a cis: trans ratio of 1 .7: 1.
- Odor flowery, grape hyacinth (int.3), sweet (int.3), coumarin (int.2)
- Example 2 The preparation was carried out analogously to Example 1. The product was obtained after column chromatography (cyclohexane / ethyl acetate) in 80% purity as cis / trans mixture with a cis: trans ratio of 1.2: 1.
- Example 2 The preparation was carried out analogously to Example 1. The product was obtained after column chromatography (cyclohexane / ethyl acetate) in 96% purity as a cis / trans mixture with a cis: trans ratio of 5: 1.
- Example 2 The preparation was carried out analogously to Example 1. The product was obtained after column chromatography (cyclohexane / ethyl acetate) in 84% purity as a cis / trans mixture with a cis: trans ratio of 2.8: 1.
- Odor lily of the valley (int.1), cresol / smoke (int.2), technical (int.2) cis- (l-A.7)
- Odor solvent (int.3), rubber (int.4), hot angle grinder cis- (l-A.8)
- Example 2 The preparation was carried out analogously to Example 1. The product was obtained after column chromatography (cyclohexane / ethyl acetate) in 70% purity as a cis / trans mixture with a cis: trans ratio of 3: 1.
- n-Butanal 120 g, 1.66 mol was initially charged with an acidic ion exchange resin (Amberlyst® 131, 50 g) at room temperature and isopulegol (240 g, 1.56 mol) was metered in within 20 minutes. During the addition, the temperature rose to about 65 ° C. After completion of the addition, the mixture was stirred at 70 ° C for 8 h, allowed to cool and the mixture was diluted with 300 ml of water and filtered from the acidic ion exchanger. The phases were separated, the organic phase diluted with toluene and washed with saturated aqueous NaHCO 3 solution and NaCl solution. Subsequently, the solvent was removed on a rotary evaporator.
- an acidic ion exchange resin Amberlyst® 131, 50 g
- isopulegol 240 g, 1.56 mol
- the product was fractionated by distillation as a diastereomeric mixture of the alcohols with an (alpha) - (l-Bc.3): (beta) - (l-Bc.3) ratio of 1: 4 as a viscous liquid (1.104 g, 30 %) receive.
- the alcohol (as a mixture of diastereomers, 10.2 g, 42 mmol) was initially charged in toluene at 60 ° C. Keten was obtained by pyrolysis of acetone at 700 ° C and the pyrolysis gas stream for 8.5 h with vigorous stirring passed through the reaction mixture. Sales were> 90%. It was then allowed to cool and the solvent removed on a rotary evaporator.
- the product was obtained after column chromatography (cyclohexane / ethyl acetate) in a purity of 96% as a mixture of two diastereomers with a
- Example 10 The preparation was carried out analogously to Example 10. The product was after column chromatography (cyclohexane / ethyl acetate) in a purity of 84% as a mixture of two isomers with an (alpha) - (lB.1): (beta) - (lB.1) Ratio of 1:16 obtained.
- the respective benzaldehyde was initially charged at room temperature with Amberlyst 131 wet® (10% by weight, based on the sum of the masses of benzaldehyde and isoprenol) and an equimolar amount of isoprenol was rapidly added. If necessary, especially if the respective benzaldehyde was solid at room temperature, toluene was used as the solvent. Then the reaction mixture was stirred for 5 h at 60 ° C, then cooled, filtered off the acidic ion exchanger and washed with toluene. Any solvents were removed on a rotary evaporator. Fragrance samples were obtained either by purification by distillation, column chromatography or by recrystallization.
- the preparation was carried out analogously to the general preparation of tetra hydropyran nolderivate from benzaldehydes.
- the product was obtained after column chromatography (cyclohexane / ethyl acetate) in a purity of 99% as cis / trans mixture with a cis: trans ratio of 2: 1.
- the preparation was carried out analogously to the general preparation of tetra hydropyran nolderivate from benzaldehydes.
- the product was obtained after column chromatography (cyclohexane / ethyl acetate) in a purity of 99% as a cis / trans mixture with a cis: trans ratio of 1.1: 1.
- the preparation was carried out analogously to the general preparation of the Tetrahydropyran- nolderivate from benzaldehydes.
- the product was obtained after column chromatography (cyclohexane / ethyl acetate) in a purity of 96% as a cis / trans mixture with a cis: trans ratio of 1.4: 1.
- the preparation was carried out analogously to the general preparation of tetra hydropyran nolderivate from benzaldehydes.
- the crude product was recrystallized from n-heptane.
- the cis-isomer was obtained in a purity of 99%.
- the preparation was carried out analogously to the general preparation of the Tetrahydropyran- nolderivate from benzaldehydes.
- the product was obtained after column chromatography (cyclohexane / ethyl acetate) in a purity of 97% as a cis / trans mixture with a cis: trans ratio of 9: 1.
- the product was odorless.
- the preparation was carried out analogously to the general preparation of tetra hydropyran nolderivate from benzaldehydes.
- the product was obtained after column chromatography (cyclohexane / ethyl acetate) in a purity of 98%.
- the preparation was carried out analogously to the general preparation of the tetrahydropyranol derivatives of benzaldehydes.
- the product was obtained after column chromatography (cyclohexane / ethyl acetate) as a cis isomer in a purity of 95%.
- the preparation was carried out analogously to the general preparation of the tetrahydropyranol derivatives from aliphatic aldehydes.
- the product was after column chromatography (cyclohexane / ethyl acetate) in a purity of 97% as an isomer mixture with an (alpha) - (l-Bc.1): (beta) - (l-Bc.1) ratio of 1: 5.5 received. Odor: no specific smell.
- the preparation was carried out analogously to the general preparation of tetra hydropyran- nolderivate from aliphatic aldehydes.
- the product was obtained after column chromatography (cyclohexane / ethyl acetate) in a purity of 92% as an isomer mixture with an (alpha) - (l-Bc.1): (beta) - (l-Bc.1) ratio of 1: 5.6 ,
- the preparation was carried out analogously to the general preparation of tetra hydropyran- nolderivate from aliphatic aldehydes.
- the product was recrystallized from n-heptane and obtained as a pure isomer. Odor: no specific smell.
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Abstract
Description
Claims
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EP16172106 | 2016-05-31 | ||
PCT/EP2017/062987 WO2017207539A1 (de) | 2016-05-31 | 2017-05-30 | Tetrahydropyranylniederalkylester und deren herstellung mittels einer ketenverbindung |
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EP3572487A1 (de) * | 2018-05-25 | 2019-11-27 | Basf Se | 2-furyl- und 2-thienyl-substituierte di- und tetrahydropyrane zur verwendung als aromachemikalien |
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- 2017-05-30 EP EP17727194.7A patent/EP3464258A1/de active Pending
- 2017-05-30 MX MX2018014918A patent/MX2018014918A/es unknown
- 2017-05-30 WO PCT/EP2017/062987 patent/WO2017207539A1/de unknown
- 2017-05-30 CN CN201780033242.2A patent/CN109195959B/zh active Active
- 2017-05-30 JP JP2018562284A patent/JP7115988B2/ja active Active
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MX2018014918A (es) | 2019-09-05 |
US10981885B2 (en) | 2021-04-20 |
WO2017207539A1 (de) | 2017-12-07 |
CN109195959B (zh) | 2023-08-18 |
US20200325112A1 (en) | 2020-10-15 |
BR112018074538B1 (pt) | 2022-09-13 |
JP7115988B2 (ja) | 2022-08-09 |
CN109195959A (zh) | 2019-01-11 |
JP2019518020A (ja) | 2019-06-27 |
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