EP1480934A2 - Production d'alcenones - Google Patents

Production d'alcenones

Info

Publication number
EP1480934A2
EP1480934A2 EP03704499A EP03704499A EP1480934A2 EP 1480934 A2 EP1480934 A2 EP 1480934A2 EP 03704499 A EP03704499 A EP 03704499A EP 03704499 A EP03704499 A EP 03704499A EP 1480934 A2 EP1480934 A2 EP 1480934A2
Authority
EP
European Patent Office
Prior art keywords
onium
acid
salt
substituted
reaction
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Withdrawn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
EP03704499A
Other languages
German (de)
English (en)
Inventor
Max Braun
Uta Claassen
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.)
Solvay Fluor GmbH
Original Assignee
Solvay Fluor und Derivate GmbH
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
Priority claimed from DE10261471A external-priority patent/DE10261471A1/de
Application filed by Solvay Fluor und Derivate GmbH filed Critical Solvay Fluor und Derivate GmbH
Priority to EP11165289A priority Critical patent/EP2360136A1/fr
Publication of EP1480934A2 publication Critical patent/EP1480934A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/06—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
    • C07D213/16—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom containing only one pyridine ring
    • C07D213/18—Salts thereof
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/45—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by condensation
    • C07C45/455—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by condensation with carboxylic acids or their derivatives

Definitions

  • the invention relates to a process for the preparation of halogenated alkenone ethers.
  • Halogenated alkenone ethers for example 4-ethoxy-1, 1, 1-trifluoro-3-buten-2-one / are building blocks in chemical synthesis, see for example EP-0 744 400. They can be prepared by adding an acid chloride with a Reacts vinyl ether with one another in the presence of a base, see the above-mentioned European patent application.
  • the object of the present invention is to provide an improved method. This object is achieved by the method of the present invention.
  • R 1 represents a Cl-C4-alkyl group or a C1-C4-alkyl group which is substituted by at least 1 halogen atom, or wherein R 1 represents CF 3 C (0) CH 2 , and where R 2 represents aryl, substituted aryl, a C1-C4-alkyl group or for a Cl-C4-alkyl group which is substituted by at least 1 halogen atom, provides that an acid anhydride or an acid halide of the formula (II)
  • R 2 has the abovementioned meaning, in the presence of an "onium” salt of a carboxylic acid, or where one uses 1 or 2 Cl-C3-alkyl groups, optionally chlorinated pyridine, or where one uses an "onium” salt an inorganic acid.
  • pyridine substituted by 1, 2 or 3 Cl-C3-alkyl groups preferably picoline, collidine or lutidine (ie pyridine which is substituted by 1, 2 or 3 methyl groups, all isomers being usable), preferably 2-Picolin
  • the pyridine substituted by 1 to 3 Cl-C3-alkyl groups can also be substituted in the nucleus and / or the alkyl group (s) by one or more chlorine atoms.
  • chloromethyl, dichloromethyl and trichloromethyl pyridine, in particular the picolines substituted in the 2-position is preferred.
  • an "onium” salt of any amine of an inorganic acid is used. It has been found that adducts of amine and acid, including inorganic acid, are effective as acid scavengers in the present invention if the molar ratio of amine to acid is less than 3. For example, Oniur ⁇ hydrochlorid is able to 2 mol HCl, which comes from the reaction, intercept. In this variant, onium hydrochloride is preferred.
  • a particularly preferred variant provides for the use of onium carboxylates of any amines. This method has the advantage of a milder reaction and a higher yield compared to the prior art method in which a trialkylamine is used as the base, and is further explained below.
  • R 1 preferably represents methyl, ethyl, n-propyl or i-propyl or methyl, ethyl, n-propyl or i-propyl substituted by at least 1 fluorine atom.
  • R 1 particularly preferably represents methyl, ethyl or methyl or ethyl substituted by at least 1 fluorine atom.
  • R 1 very particularly preferably represents CF 3 , CF 2 H, CF 2 C1, C 2 F 5 , C 3 F 7 or CF 3 C (0) CH 2 .
  • R 2 can represent aryl, for example phenyl or C1-C4 alkyl groups and / or halogen atoms substituted phenyl.
  • R 2 is preferably linear or branched Cl-C4-alkyl.
  • R 2 very particularly preferably denotes methyl, ethyl, n-propyl or i-propyl.
  • the molar ratio of "onium” salt and acid halide or acid anhydride is advantageously between 0.1: 1 and 2: 1.
  • the acid chloride is preferred as the acid halide.
  • the invention is further explained on the basis of this preferred embodiment.
  • the molar ratio of acid chloride or anhydride and vinyl ether is advantageously between 0.9: 1 and 1: 0.8.
  • the implementation is e.g. B. at -15 to +80 ° C, advantageously carried out at a temperature in the range of 0 ° to 40 ° C. It can be exothermic, so that the reaction mixture may need to be cooled or the reaction may be carried out very slowly.
  • a solvent is used in the reaction. This is particularly advantageous if first the vinyl ether and then the anhydride are added to the "onium" salt or amine.
  • aliphatic linear or branched hydrocarbons or aliphatic linear or branched halogenated carbons are suitable.
  • Halogenated carbon (hydrogen) compounds with 1 to 8 carbon atoms, for example, are particularly suitable.
  • dichloromethane 1, 1, 1-trifluoro-2, 2, 2-trichloroethane, hexane, cyclohexane, trifluoroacetic acid ethyl or propyl ester are very suitable.
  • no solvent is used in the reaction between anhydride and vinyl ether. This is particularly possible if the anhydride and then the vinyl ether are first added to the "onium" salt or amine.
  • the advantage is that no solvent has to be separated, which is of course advantageous (no effort for recovery, lower energy consumption).
  • the anion of the carboxylic acid of the "onium” salt preferably has the formula R 1 C (0) 0 ⁇ , where R 1 has the meaning given above.
  • the carboxylic acid in the "onium” salt of the carboxylic acid used is preferably the acid which corresponds to the acid halide used.
  • the term "onium” stands for cations with positively charged nitrogen, for example protonated aromatic nitrogen bases such as pyridinium or protonated alkyl, dialkyl or trialkyl ammonium cations or for cycloalkyl-substituted ammonium compounds or cycloaliphatic nitrogen bases such as piperidinium or quaternary ammonium cations.
  • Onium salts are very suitable as carboxylic acid salts, where "onium” stands for a cation of the nitrogen of the formula R ⁇ 'R ⁇ R ⁇ " .
  • R', R", R '"and R" independently of one another Hydrogen, alkyl having 1 to 20 carbon atoms, aryl or aralkyl.
  • R 'and R “or R”' and R “”, or R ', R “and R”' or R ', R “, R'” and R “” can also form saturated or unsaturated ring systems, optionally including the nitrogen atom.
  • Aryl here means in particular phenyl or phenyl substituted by 1 or more Cl-C2-alkyl groups.
  • Amines substituted by hydroxy groups especially cycloaliphatic amines, especially hydroxy-substituted piperidines and N-Cl-C4-alkylpiperidines, can also be used.
  • the ring can be substituted by one or more amino groups.
  • Dialkylamino groups are preferred in which the alkyl groups can be the same or different and comprise 1 to 4 carbon atoms.
  • the amino group can also represent a saturated ring system, for example a piperidino group.
  • Representatives of monocyclic ring systems that can be used are dialkylaminopyridine, dialkylaminopiperidine and dialkylaminopiperazine.
  • Onium cations of bicyclic compounds can also be used.
  • 1, 2 or more nitrogen atoms can be integrated into the ring system.
  • the compounds can be substituted by one or more amino groups.
  • Dialkylamino groups are again preferred, the alkyl groups being the same or different and comprising 1 to 4 carbon atoms or together with the nitrogen atom forming a saturated ring system, such as the piperidinyl group.
  • At least 2 nitrogen atoms in the useful compounds must have basic properties and, depending on the type of bonds, are bound to 2 or 3 carbon atoms.
  • Onium salts of carboxylic acid with bicyclic amines in particular 1,5-diaza-bicyclo [4.3.0] non-5-ene (DBN) and 1,8-diazabicyclo [5.4.0] - are very particularly preferred. undec-7-cen (DBU).
  • DBN 1,5-diaza-bicyclo [4.3.0] non-5-ene
  • the "onium” salts of aromatic amines especially those with one, two or three electron-donating groups, such as Cl-C3-alkyl groups, are very useful, e.g.
  • the "onium” salts of the carboxylic acids can be prepared by simply reacting the corresponding amines with the free acids.
  • the process according to the invention for the preparation of alkanes of the formula (I) can be carried out at elevated pressure or else at ambient pressure. It can be carried out batchwise or semi-continuously.
  • reaction mixtures are worked up by customary methods.
  • the desired alkenone of the formula (I) can be distilled out of the mixture after the solvent (if present) has been separated off.
  • Another possibility is to add water to the reaction mixture and to isolate the alkenone from the organic phase after water has been separated off by customary separating agents such as sodium sulfate.
  • a preferred embodiment takes advantage of the workup with 2-phase formation.
  • a variant provides for working up with the addition of water.
  • An organic phase is formed which contains the desired product and the organic solvent used.
  • the aqueous phase contains the spent "onium” salt. If the acid anhydride has been used as one of the starting materials, the "onium” salt is largely present as the “onium” salt of the carboxylic acid corresponding to the anhydride. If you have used the "onium” salt of the carboxylic acid as an acid scavenger, this is If there is an excess of acid in the aqueous phase.
  • the ratio of "onium” cation to carboxylic acid content must be brought to the preferred range from 0.9: 1 to 1: 0.9.
  • the easiest way to do this is to add as much alcohol, e.g. B. of Cl-C4-aliphatic alcohols, causes the acid present beyond the desired content to react with esterification and can be separated off by distillation together with the water present.
  • the "onium” salt is largely in the aqueous phase as hydrochloride or as a chloride-enriched onium complex.
  • carboxylic acid e.g. B. trifluoroacetic acid, preferably in a 5 to 10-fold molar excess. Released hydrochloric acid is evaporated at a higher temperature. Since an excess of the carboxylic acid is usually used in this regeneration, there is then again an "onium” salt of the carboxylic acid with an excess of acid, which is not very suitable for reuse.
  • An alcohol is then added, as already described above, which reacts with the excess acid to form an ester. The ester can then be distilled off, with water also being distilled off.
  • an organic solvent is added, which causes the formation of two phases.
  • solvents which cause the reaction mixture to be in a homogeneous phase are first removed.
  • a solvent or solvent mixture is added, which causes the splitting into two phases.
  • the following have proven useful, for example: ethers, especially dialkyl ethers, especially diethyl ether; Esters of trifluoroacetic acid, for example isopropyl trifluoroacetate; aliphatic hydrocarbons, for example hexane; cyclic hydrocarbons, for example cyclohexane; halogenated carbon compounds, for example l, l, 2-trichloro-l, 2,2-trifluoroethane (CFC-113) or dichloromethane.
  • phase contains the solvent and the alkenone formed, the other phase essentially the salt.
  • the phase which contains the alkenone is separated off, the solvent is removed and the alkenone can then be purified in the customary manner, for example by distillation, if this is necessary at all, since the product is usually obtained in very high purity. It has been shown that the yield and purity of the product is very high in this embodiment too.
  • regeneration can also be carried out by adding the anhydride of the carboxylic acid, e.g. B. by adding acetic anhydride or trifluoroacetic anhydride, preferably by adding the anhydride of the carboxylic acid that corresponds to the acid chloride used.
  • the acid chloride and the "onium" salt of the carboxylic acid are then formed, which can then be reacted further with vinyl ethers in accordance with the process of the invention.
  • the "onium” salt of the carboxylic acid can be prepared beforehand by reacting the free base with the carboxylic acid. It can also be prepared during the reaction by continuously or batchwise introducing the carboxylic anhydride of the carboxylic acid corresponding to the acid chloride into the reaction mixture.
  • a modification of the process according to the invention provides that an aldehyde or acid chloride of the general formula (II) and a vinyl ether of the general formula (III) are reacted in the presence of an amine base, as described, for example, in EP-A- 0 744 400 loading is written.
  • the resulting A hydrochloride is then preferably regenerated as described above and used again in this embodiment in a second stage in the process according to the invention.
  • Another object of the invention are adducts of a carboxylic acid anion of the formula R 1 C (O) 0 ⁇ with a protonated cation of pyridine which is substituted by one, two or three C1-C3 alkyl groups, preferably by one, two or three methyl groups , Such adducts with the anion of trifluoroacetic acid are preferred. These adducts can additionally contain up to 1 mole of free acid per mole of "onium" salt.
  • the protonated cation of the pyridine substituted by 1 to 3 Cl-C3-alkyl groups can also be chlorinated, especially in the alkyl groups. So it can be 2-chloroethyl, 2-dichloromethyl and 2-trichloromethylpyridinium.
  • Another object of the invention is the use of pyridine, which is substituted by 1, 2 or 3 C-1-C3-alkyl groups, as an acid scavenger.
  • 2-alkyl pyridine with alkyl methyl, ethyl or propyl is preferred.
  • Examples 1 to 8 illustrate the preparation using trifluoroacetyl chloride
  • Examples 9 to 12 the preparation using trifluoroacetic anhydride
  • Example 13 illustrates the regeneration of the spent "onium” salt with trifluoroacetic acid.
  • the pyridinium trifluoroacetate was first prepared in a 500 ml three-necked flask with a dry ice cooler. For this purpose, pyridine was introduced and TFA was added dropwise with stirring. So that the mixture did not become too hot (since the reaction is highly exothermic), it was cooled with a water bath. Then dichloromethane and ethyl vinyl ether were added and TFAC was introduced with stirring. The reaction temperature was kept at room temperature by means of a water bath. The approach turned slightly yellowish when TFAC was initiated. The mixture was then stirred for a further 2% at room temperature and then a GC sample was taken (sample was hydrolyzed). The turnover contributed 97.2%, the selectivity to 4-ethoxy-1,1,1-trifluoro-3-buten-2-one (ETFBO) was quantitative.
  • ETFBO 4-ethoxy-1,1,1-trifluoro-3-buten-2-one
  • the DBNxTFA was first prepared in a 250 ml three-necked flask with a dry ice cooler. For this purpose, DBN was introduced and TFA was added dropwise with stirring. So that the mixture did not become too hot (since the reaction is highly exothermic), it was cooled with a water bath, and DBNxTFA became solid. Then dichloromethane, ethyl vinyl ether was added and TFAC headed. The reaction temperature was kept at room temperature by means of a water bath. The approach turned yellow when TFAC was initiated. The mixture was then stirred for a further 1 h at room temperature and then a GC sample was taken (sample is hydrolyzed). EVE sales were quantitative, selectivity to ETFBO was 93.4%.
  • the DBNxTFA was first produced in a 100 ml three-necked flask with a dry ice cooler. For this purpose, dichloromethane with DBN was introduced and TFA was added dropwise with stirring. To prevent the mixture from becoming too hot (since the reaction was highly exothermic), it was cooled with a water bath. Then ethyl vinyl ether was added and TFAC was introduced with stirring. The reaction temperature was kept at room temperature by means of a water bath. The approach turned yellow when TFAC was initiated. The mixture was then stirred for a further VA h at room temperature and then a GC sample was taken (sample is hydrolyzed). The sales of EVE was quantitative, the selectivity to ETFBO was 95%. Refurbishment as in example 1.
  • ETFBO 4-ethoxy-l, 1, 1-trifluoro-3-butene-2-one
  • the DBN x TFA was first prepared in a 250 ml three-necked flask with a dry ice cooler. For this purpose, MeCl 2 and DBN were introduced and TFA was added dropwise with stirring. So that the mixture did not become too hot (since the reaction is very exothermic), it was cooled with a water bath. Then ethyl vinyl ether was added and TFAC was introduced with stirring. The reaction temperature was kept at room temperature by means of a water bath. The approach turned orange when TFAC was initiated. The mixture was then stirred for a further 2 h at room temperature and then a GC sample was taken (sample is hydrolyzed). The ethyl vinyl ether had completely reacted.
  • the solvent dichloromethane was then removed in vacuo in a rotary evaporator, and the remaining solution was divided into several partial volumes, which were worked up by adding a solvent which formed a second phase.
  • the partial volumes were mixed with the same volume fractions of the following solvents, whereupon a second phase was formed:
  • the desired product ETFBO was mainly in the organic phase; the used amine salt was quantitatively in the other phase.
  • the ETFBO phase was separated off and now gently isolated on the rotary evaporator by removing the solvent in vacuo with a purity> 98%.
  • the DBU x TFA was first produced in a 250 ml three-necked flask with a dry ice cooler. For this purpose, MeCl 2 and DBU were introduced and TFA was added dropwise with stirring. So that the mixture did not become too hot (since the reaction is very exothermic), it was cooled with a water bath. Then ethyl vinyl ether was added and TFAC was introduced with stirring. The reaction temperature was kept at room temperature by means of a water bath. The approach turned orange when TFAC was initiated. The mixture was then stirred at room temperature for a further 2 h and then a GC sample was taken (sample is hydrolyzed). A second sample was taken the next morning (batch had turned dark). The ethyl vinyl ether had completely converted to ETFBO. The isolation was carried out using the second phase method described in Example 4.
  • the pyridinium trifluoroacetate was first prepared in a 500 ml three-necked flask with a dry ice cooler. For this purpose, pyridine was introduced and TFA was added dropwise with stirring. So that the mixture did not become too hot (since the reaction is very exothermic), it was cooled with a water bath. Then dichloromethane and ethyl vinyl ether were added and with stirring TFAC initiated. The reaction temperature was kept at room temperature by means of a water bath. The approach became slightly yellowish when ⁇ ron TFAC was introduced. The mixture was then stirred for a further 2% at room temperature and then a GC sample was taken (sample is hydrolyzed).
  • Example 7 The workup described in Examples 4 to 6 by forming two phases led to particularly high yields, thermal stress on the reaction mixture being avoided.
  • the picoline trifluoroacetate was first prepared in a 250 ml three-necked flask with a dry ice cooler. For this purpose, dichloromethane and 2-picoline were introduced and TFA was added dropwise with stirring. So that the mixture did not become too hot (since the reaction is very exothermic), it was cooled with a water bath. Then ethyl vinyl ether was added and TFAC was introduced with stirring. The reaction temperature was kept at room temperature by means of a water bath. The approach turned yellow when TFAC was initiated. The mixture was then stirred at room temperature for a further 272 h and then a GC sample was taken (sample was hydrolyzed). The ethyl vinyl ether had completely reacted. The batch was then added to 150 g of ice water, the organic phase was washed twice with water and distilled using a Rotavapor.
  • the 4-ethoxy-l, 1, 1-trifluoro-3-buten-2-one distilled at 65 ° C water bath temperature and 15 mbar. According to the gas chromatogram, the purity was 97.4%. The ETFBO yield was 76.2%.
  • the picoline trifluoroacetate was first prepared in a 250 ml three-necked flask with a water cooler. For this purpose, dichloromethane and 2-picoline were introduced and TFA was added dropwise with stirring. So that the mixture did not become too hot (since the reaction is very exothermic), it was cooled with a water bath. Then ethyl vinyl ether was added and TFAH was added dropwise with stirring. The reaction temperature was kept at room temperature by means of a water bath. The mixture turned yellow when TFAH was added dropwise. The mixture was stirred for a further 1 h and then a GC sample was taken (sample was hydrolyzed).
  • the pyridine trifluoroacetate was first prepared in a 250 ml three-necked flask with a water cooler. For this purpose, dichloromethane and pyridine were introduced and TFA was added dropwise with stirring. So that the mixture did not become too hot (since the reaction is very exothermic), it was cooled with a water bath. Then ethyl vinyl ether was added and TFAH was added dropwise with stirring. The reaction temperature was kept at room temperature by means of a water bath. The mixture was stirred for a further 1 h and then a GC sample was taken (sample was hydrolyzed). The next morning, another sample was taken - the ethyl vinyl ether had fully reacted. The yield of ETFBO was 85.0%.
  • the DBN x TFA was first produced in a 250 ml three-necked flask with a water cooler. For this purpose, MeCl 2 and DBN were introduced and TFA was added dropwise with stirring. So that the mixture did not become too hot (since the reaction is very exothermic), it was cooled with a water bath. Then ethyl vinyl ether was added and TFAH was added dropwise with stirring. The reaction temperature was kept at room temperature by means of a water bath. The approach turned yellow. The mixture was then stirred for a further 1.5 h at room temperature and then a GC sample was taken (sample was hydrolyzed). The ethyl vinyl ether had completely reacted.
  • MeCl 2 was stripped off in vacuo at room temperature in a rotary evaporator and the remaining solution was extracted after division into partial volumes with various solvents forming two phases. Hexane, pentane, cyclohexane and 113 were used as 2-phase extractants.
  • Picolin hydrochloride and TFA were placed in a 250 ml three-necked flask with a water cooler and boiled under reflux. Cl ⁇ samples were taken after 1 h and 7 h.
  • the chloride is easier to exchange than pyridine.
  • Example 12 a The reaction product from Example 12 a) was heated and excess trifluoroacetic acid was distilled off until picolinium trifluoroacetate was present as an adduct with further trifluoroacetic acid; Two moles of trifluoroacetic acid (amine x 3 TFA) were present in the residue per mole of picolinium trifluoroacetate. A further separation of trifluoroacetic acid from this adduct was not possible by distillation. 1 mol of ethanol was added per mol of acetic acid.
  • the picoline trifluoroacetate was first prepared by introducing 2-picoline and adding TFA while stirring. So that the mixture did not become too hot (since the reaction is very exothermic), it was cooled with an ice water bath. Then TFAH was added and ethyl vinyl ether was added dropwise with stirring (reaction highly exothermic). The reaction temperature was kept at room temperature by means of an ice water bath. The reaction mixture turned yellow when TFAH was added. The mixture was stirred for another hour and then a GC sample was taken (sample is hydrolyzed). ETFBO sales were 91.3%.
  • Example 13 was repeated. The reaction was carried out without a solvent, and dichloromethane was then added for even better phase separation. Again there was a high turnover to ETFBO.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Pyridine Compounds (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

Des éthers d'alcénone halogénés peuvent être obtenus par addition d'halogénures ou d'anhydrides d'acide carboxylique à un éther vinylique. L'amélioration apportée par la présente invention consiste à réaliser cette addition en présence d'un sel 'onium' d'un acide carboxylique, ce sel pouvant être régénéré. Les produits peuvent être obtenus avec un rendement élevé. On peut également utiliser une pyridine substituée par un, deux ou trois groupes alkyle C1-C3, ou d'autres sels 'onium'.
EP03704499A 2002-02-08 2003-01-30 Production d'alcenones Withdrawn EP1480934A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11165289A EP2360136A1 (fr) 2002-02-08 2003-01-30 Production d'alcénones

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10205224 2002-02-08
DE10205224 2002-02-08
DE10261471A DE10261471A1 (de) 2002-02-08 2002-12-31 Herstellung von Alkenonen
DE10261471 2002-12-31
PCT/EP2003/000913 WO2003066558A2 (fr) 2002-02-08 2003-01-30 Production d'alcenones

Publications (1)

Publication Number Publication Date
EP1480934A2 true EP1480934A2 (fr) 2004-12-01

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EP03704499A Withdrawn EP1480934A2 (fr) 2002-02-08 2003-01-30 Production d'alcenones

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US (1) US7057079B2 (fr)
EP (1) EP1480934A2 (fr)
JP (1) JP4376061B2 (fr)
CN (1) CN1330622C (fr)
AU (1) AU2003206803A1 (fr)
WO (1) WO2003066558A2 (fr)

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WO2009006211A1 (fr) * 2007-06-29 2009-01-08 Dow Agrosciences Llc Procédé amélioré de préparation de 4-trifluoromethyl-2(1h)-pyridinone
WO2009006217A1 (fr) * 2007-06-29 2009-01-08 Dow Agrosciences Llc 4-chloro-4-alcoxy-1,1,1-trifluoro-2-butanones, leur préparation et leur utilisation pour la préparation de 4-alcoxy-1,1,1-trifluoro-3-buten-2-ones
CN101801906A (zh) 2007-08-16 2010-08-11 索尔维公司 制备4-氟取代的3-氧代-烷酸酯的方法
JP2011526899A (ja) * 2008-07-01 2011-10-20 ダウ アグロサイエンシィズ エルエルシー ２−トリフルオロメチル−５−（１−置換）アルキルピリジンの調製のための改善された方法
EP2310350B1 (fr) 2008-07-04 2017-09-06 Solvay Sa Processus de fabrication d'alcénones
GB0903749D0 (en) * 2009-03-04 2009-04-15 Syngenta Participations Ag Chemical process
CA2765374C (fr) 2009-07-06 2018-01-02 Solvay Sa Procede de fabrication d'alcenones
US8957254B2 (en) 2009-07-06 2015-02-17 Solvay Sa Process for chemical synthesis from an alkenone made from a halogenated precursor
JP2012532182A (ja) * 2009-07-06 2012-12-13 ソルヴェイ（ソシエテ アノニム） 特有の条件下でのアルケノンのハロゲン化前駆体の製造方法
US8426650B2 (en) 2009-07-06 2013-04-23 Solvay Sa Process for the manufacture of halogenated precursors of alkenones in the presence of a solvent
WO2012025548A1 (fr) 2010-08-27 2012-03-01 Solvay Sa Procédé pour la préparation d'alcénones
WO2012085195A1 (fr) * 2010-12-23 2012-06-28 Solvay Sa Purification respectueuse de l'environnement d'une solution organique d'etfbo
WO2015011728A1 (fr) 2013-07-26 2015-01-29 Srf Limited Procédé de production d'éthers d'alcénone
CN105237376A (zh) * 2015-11-20 2016-01-13 江苏瑞邦农药厂有限公司 一种4-乙氧基-1,1,1-三氟-丁烯-2-酮的合成方法
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CN110526810A (zh) * 2018-05-25 2019-12-03 浙江蓝天环保高科技股份有限公司 一种1,1,1-三氟-4-乙氧基戊-3-烯-2-酮的制备方法
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JP4376061B2 (ja) 2009-12-02
JP2005537219A (ja) 2005-12-08
CN1628087A (zh) 2005-06-15
WO2003066558A2 (fr) 2003-08-14
US20050070716A1 (en) 2005-03-31
US7057079B2 (en) 2006-06-06
AU2003206803A1 (en) 2003-09-02
CN1330622C (zh) 2007-08-08

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