CH653681A5 - PROCESS FOR THE PREPARATION OF 2-THIOPHENE ACETIC ACID DERIVATIVES. - Google Patents
PROCESS FOR THE PREPARATION OF 2-THIOPHENE ACETIC ACID DERIVATIVES. Download PDFInfo
- Publication number
- CH653681A5 CH653681A5 CH1966/83A CH196683A CH653681A5 CH 653681 A5 CH653681 A5 CH 653681A5 CH 1966/83 A CH1966/83 A CH 1966/83A CH 196683 A CH196683 A CH 196683A CH 653681 A5 CH653681 A5 CH 653681A5
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- Prior art keywords
- formula
- product
- acid
- thiophene
- solvent
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
- C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
- C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
- C07D333/06—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring carbon atoms
- C07D333/12—Radicals substituted by halogen atoms or nitro or nitroso radicals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
- C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
- C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
- C07D333/06—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring carbon atoms
- C07D333/24—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Plural Heterocyclic Compounds (AREA)
- Heterocyclic Compounds Containing Sulfur Atoms (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
Description
La présente invention a particulièrement pour objet un procédé de préparation d'un produit de formule I': The present invention particularly relates to a process for the preparation of a product of formula I ':
Ok OK
CH— CO, H CH— CO, H
I 2 I 2
R R
dans laquelle R a la signification indiquée ci-dessus, caractérisé en ce que l'on met en œuvre le procédé tel que décrit ci-dessus au départ du thiophène. in which R has the meaning indicated above, characterized in that the process as described above is carried out starting from the thiophene.
Les produits de formule l'correspondent aux produits de formule I dans laquelle Rls R2 et R3 représentent chacun un atome d'hydrogène. The products of formula l'correspond to the products of formula I in which Rls R2 and R3 each represent a hydrogen atom.
Plus particulièrement, la présente invention a pour objet un procédé de préparation de l'acide a-méthyl 2-thiophène-acétique, caractérisé en ce que l'on met en œuvre le procédé tel que décrit ci-dessus au départ du thiophène et de l'aldéhyde acétique. More particularly, the present invention relates to a process for the preparation of a-methyl 2-thiophene-acetic acid, characterized in that the process as described above is implemented, starting from thiophene and acetic aldehyde.
Parmi les formes d'exécution préférées du procédé objet de l'invention, on utilise le procédé caractérisé en ce que l'action du produit de formule A — CN sur le produit de formule III est réalisée par une réaction de transfert de phase. Among the preferred embodiments of the process which is the subject of the invention, the process is used characterized in that the action of the product of formula A - CN on the product of formula III is carried out by a phase transfer reaction.
Ce procédé est réalisé préférentiellement en présence d'un catalyseur choisi dans le groupe formé par le chlorure de triéthylbenzyl-5 ammonium, le bromure de tétrapropylammonium, le bromure de tétrabutylammonium, le sulfate de tétrabutylammonium et l'hydr-oxyde de tétrabutylammonium. This process is preferably carried out in the presence of a catalyst chosen from the group formed by 5-triethylbenzylammonium chloride, tetrapropylammonium bromide, tetrabutylammonium bromide, tetrabutylammonium sulphate and tetrabutylammonium hydroxide.
Dans un mode particulièrement avantageux d'exécution de ce procédé, on verse le produit de formule III en solution chlorométhy-îo lénique dans une solution aqueuse de cyanure de sodium et d'un catalyseur de transfert de phase. Le catalyseur de transfert de phase est, comme indiqué précédemment, de préférence le chlorure de triéthylbenzylammonium. In a particularly advantageous embodiment of this process, the product of formula III is poured into chloromethyl-lenic solution in an aqueous solution of sodium cyanide and of a phase transfer catalyst. The phase transfer catalyst is, as indicated above, preferably triethylbenzylammonium chloride.
Enfin, on met en œuvre le procédé objet de la présente invention îs dans les conditions préférentielles suivantes pour préparer l'acide a-méthyl 2-thiophène-acétique: on fait agir l'acide chlorhydrique et le paraldéhyde sur le thiophène pour obtenir le 2-(l-chloroéthyl)thio-phène que l'on soumet dans une réaction par transfert de phase à l'action de cyanure de sodium en présence de chlorure de triéthyl-20 benzylammonium pour obtenir l'a-méthyl 2-thiophène-acétonitrile que l'on soumet d'abord à l'action de la soude, puis de l'acide chlorhydrique pour obtenir le produit attendu. Finally, the process which is the subject of the present invention is implemented under the following preferential conditions for preparing α-methyl 2-thiophene-acetic acid: hydrochloric acid and paraldehyde are made to act on the thiophene to obtain 2 - (l-chloroethyl) thio-phene which is subjected in a reaction by phase transfer to the action of sodium cyanide in the presence of triethyl-benzylammonium chloride to obtain a-methyl 2-thiophene-acetonitrile which is first subjected to the action of soda, then hydrochloric acid to obtain the expected product.
Les exemples suivants illustrent l'invention sans toutefois la limiter. The following examples illustrate the invention without, however, limiting it.
25 25
Exemple 1: Acide a-mêthyl 2-thiophène-acétique. Example 1: α-Methyl 2-thiophene-acetic acid.
Stade A: 2-( 1-Chloroéthyl)thiophène. Stage A: 2- (1-Chloroethyl) thiophene.
On refroidit sous agitation à — 5°C un mélange de 336 cm3 de chlorure de méthylène et 75 cm3 d'acide chlorhydrique aqueux, puis 30 introduit à cette température en 5 h, d'une part, un mélange de 84 g de thiophène et 44 g de paraldéhyde et, d'autre part, 36,5 g d'acide chlorhydrique gazeux. On agite et ajoute en 30 min 3,5 g d'acide chlorhydrique. On agite 3 h à — 5°C, porte à 0°C et introduit 50 g de glace. On agite à 0, +5°C pendant 15 min, décante la phase orga-35 nique, extrait la phase aqueuse à 0, +5°C par 42 cm3 de chlorure de méthylène et réunit les deux phases organiques. A mixture of 336 cm 3 of methylene chloride and 75 cm 3 of aqueous hydrochloric acid is cooled with stirring to −5 ° C., then introduced at this temperature in 5 hours, on the one hand, a mixture of 84 g of thiophene and 44 g of paraldehyde and, on the other hand, 36.5 g of gaseous hydrochloric acid. Stirred and added in 30 min 3.5 g of hydrochloric acid. The mixture is stirred for 3 h at -5 ° C., brought to 0 ° C. and 50 g of ice are introduced. The mixture is stirred at 0.5 ° C. for 15 min, the organic phase is decanted, the aqueous phase is extracted at 0.5 ° C. with 42 cm 3 of methylene chloride and the two organic phases are combined.
Stade B: a-Méthyl 2-thiophène-acétonitrile. Stage B: a-Methyl 2-thiophene-acetonitrile.
On ajoute 8,4 g de chlorure de triéthylbenzylammonium à une 40 solution refroidie à 0, + 5°C de 88,5 g de cyanure de sodium dans 168 cm3 d'eau déminéralisée. La-solution chlorométhylénique de 2-(l-chloroéthyl)thiophène obtenue précédemment est versée en 1 min dans le milieu maintenu sous agitation. On maintient sous violente agitation pendant 18 h à 0, +5°C puis ajoute 252 cm3 d'eau déminé-45 ralisée. On agite 10 min, décante la phase organique et extrait la phase aqueuse par 84 cm3 de chlorure de méthylène, puis deux fois 42 cm3 du même solvant. On réunit les phases organiques, les lave par de l'eau déminéralisée, puis par de l'eau à 1 % d'acide chlorhydrique pur, puis de nouveau par de l'eau déminéralisée. 50 La phase organique est concentrée sous pression réduite pendant 2 h. On obtient 105 g de produit attendu. 8.4 g of triethylbenzylammonium chloride are added to a solution cooled to 0.5 ° C. of 88.5 g of sodium cyanide in 168 cm 3 of demineralized water. The chloromethylenic solution of 2- (1-chloroethyl) thiophene obtained previously is poured in 1 min into the medium maintained with stirring. Maintained under vigorous stirring for 18 h at 0, + 5 ° C and then added 252 cm3 of demineralized water-45. The mixture is stirred for 10 min, the organic phase is decanted and the aqueous phase is extracted with 84 cm3 of methylene chloride, then twice 42 cm3 of the same solvent. The organic phases are combined, washed with demineralized water, then with water containing 1% pure hydrochloric acid, then again with demineralized water. The organic phase is concentrated under reduced pressure for 2 h. 105 g of expected product are obtained.
Stade C: Acide a-méthyl 2-thiophène-acétique. Stage C: α-methyl 2-thiophene-acetic acid.
On porte au reflux pendant 2 Vz h un mélange de 105 g de 55 produit obtenu précédemment, 500 cm3 d'eau déminéralisée et 63,2 g de soude. On refroidit à 20° C et ajoute 168 cm3 de chlorure de méthylène. On agite 10 min et décante la phase chlorométhylénique. On répète deux fois la même opération. A la phase aqueuse, on ajoute 168 cm3 de toluène, puis 168 cm3 d'acide chlorhydrique 60 22° B. On porte au reflux 1 h, refroidit à 20" C, agite 15 min, décante la phase aqueuse et lave quatre fois avec chaque fois 42 cm3 d'eau déminéralisée. On concentre la phase organique sous pression réduite. On obtient 71 à 74 g de produit attendu. A mixture of 105 g of 55 product obtained above, 500 cm 3 of demineralized water and 63.2 g of sodium hydroxide is brought to reflux for 2 Vz h. Cool to 20 ° C and add 168 cm3 of methylene chloride. Stirred 10 min and decanted the chloromethylenic phase. The same operation is repeated twice. To the aqueous phase, 168 cm3 of toluene are added, then 168 cm3 of hydrochloric acid 60 22 ° B. The mixture is brought to reflux for 1 h, cooled to 20 "C, stirred for 15 min, decanted the aqueous phase and washed four times with each time 42 cm 3 of demineralized water The organic phase is concentrated under reduced pressure to obtain 71 to 74 g of the expected product.
Exemple 2: Les stades A à C ci-dessus peuvent être modifiés de la manière suivante: Example 2: The stages A to C above can be modified as follows:
Stade A 2-f 1-Chloroéthyljthiophène. Stage A 2-f 1-Chloroethyljthiophene.
On fait barboter jusqu'à saturation pendant 25 min de l'acide The acid is bubbled until saturation for 25 min.
5 5
653 681 653,681
chlorhydrique gazeux dans un mélange de 84 g de thiophène, 44 g de paraldéhyde et 75 cm3 d'acide chlorhydrique 22° B en maintenant la température à 10-13°C. hydrochloric gas in a mixture of 84 g of thiophene, 44 g of paraldehyde and 75 cm3 of hydrochloric acid 22 ° B while maintaining the temperature at 10-13 ° C.
On verse dans 75 cm3 d'eau glacée, décante, extrait la phase aqueuse avec 168 cm3 de chlorure de méthylène et lave trois fois la s phase organique par 50 cm3 d'eau glacée. Poured into 75 cm3 of ice water, decanted, the aqueous phase is extracted with 168 cm3 of methylene chloride and the organic phase is washed three times with 50 cm3 of ice water.
Stade A 2: Stage A 2:
On introduit à + 10°C de l'acide chlorhydrique gazeux jusqu'à saturation dans un mélange de 46 g d'éthanol et 44 g de paraldé- 10 hyde. Ce réactif est ajouté en 10 min à + 10°C sous agitation sur 84 g de thiophène. On procède ensuite comme indiqué ci-dessus en A1. Gaseous hydrochloric acid is introduced at + 10 ° C. until saturation in a mixture of 46 g of ethanol and 44 g of paraldehyde. This reagent is added over 10 min at + 10 ° C with stirring on 84 g of thiophene. We then proceed as indicated above in A1.
Stade A 3: Stage A 3:
15 15
On agite à 10-13° C un mélange de 84 g de thiophène, 44 g de paraldéhyde, 168 cm3 de chlorure de méthylène et 75 cm3 d'acide chlorhydrique 22° B. On sature par 40 g d'acide chlorhydrique gazeux puis refroidit à 0°C. On ajoute 50 g de glace, décante, extrait la phase aqueuse par 42 cm3 de chlorure de méthylène et lave l'ensemble des phases organiques par deux fois 63 cm3 d'eau glacée. A mixture of 84 g of thiophene, 44 g of paraldehyde, 168 cm 3 of methylene chloride and 75 cm 3 of hydrochloric acid 22 ° B is stirred at 10-13 ° C. It is saturated with 40 g of gaseous hydrochloric acid and then cooled at 0 ° C. 50 g of ice are added, decanted, the aqueous phase is extracted with 42 cm3 of methylene chloride and all of the organic phases are washed with twice 63 cm3 of ice water.
Stade B1: Stage B1:
Le chlorure de triéthylbenzylammonium est remplacé par les réactifs suivants: Triethylbenzylammonium chloride is replaced by the following reagents:
— bromure de tétrapropylammonium, - tetrapropylammonium bromide,
— bromure de tétrabutylammonium, - tetrabutylammonium bromide,
— sulfate de tétrabutylammonium, - tetrabutylammonium sulfate,
— hydroxyde de tétrabutylammonium. - tetrabutylammonium hydroxide.
Stade C Stage C
Le dichloroéthane a été substitué au chlorure de méthylène comme solvant d'extraction. Dichloroethane was substituted for methylene chloride as the extraction solvent.
r r
Claims (5)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8220272A FR2537138A1 (en) | 1982-12-03 | 1982-12-03 | PROCESS FOR THE PREPARATION OF ACETIC 2-THIOPHENE ACID DERIVATIVES |
Publications (1)
Publication Number | Publication Date |
---|---|
CH653681A5 true CH653681A5 (en) | 1986-01-15 |
Family
ID=9279758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH1966/83A CH653681A5 (en) | 1982-12-03 | 1983-04-12 | PROCESS FOR THE PREPARATION OF 2-THIOPHENE ACETIC ACID DERIVATIVES. |
Country Status (22)
Country | Link |
---|---|
JP (1) | JPS59106483A (en) |
KR (1) | KR900003281B1 (en) |
AT (1) | AT392785B (en) |
AU (1) | AU557065B2 (en) |
BE (1) | BE896440A (en) |
CA (1) | CA1201442A (en) |
CH (1) | CH653681A5 (en) |
DE (1) | DE3314028C2 (en) |
DK (1) | DK157492C (en) |
ES (1) | ES8401958A1 (en) |
FI (1) | FI80882C (en) |
FR (1) | FR2537138A1 (en) |
GB (1) | GB2132608B (en) |
HU (1) | HU191831B (en) |
IE (1) | IE55097B1 (en) |
IT (1) | IT1174758B (en) |
LU (1) | LU84749A1 (en) |
NL (1) | NL8301693A (en) |
NZ (1) | NZ204510A (en) |
PT (1) | PT76535B (en) |
SE (1) | SE453918B (en) |
ZA (1) | ZA832697B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1276738B1 (en) * | 1995-06-16 | 1997-11-03 | Erregierre Spa | PROCESS FOR THE PREPARATION OF DERIVATIVES OF -METHYL-2- THIOPHENEACETIC ACID |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IE33054B1 (en) * | 1968-04-16 | 1974-03-06 | Ici Ltd | Heterocyclic compounds |
GB2003570B (en) * | 1977-06-08 | 1982-01-20 | Imi Opella Ltd | Stop valve |
-
1982
- 1982-12-03 FR FR8220272A patent/FR2537138A1/en active Granted
-
1983
- 1983-03-28 DK DK140083A patent/DK157492C/en not_active IP Right Cessation
- 1983-03-30 SE SE8301786A patent/SE453918B/en not_active IP Right Cessation
- 1983-03-31 FI FI831116A patent/FI80882C/en not_active IP Right Cessation
- 1983-04-05 ES ES521231A patent/ES8401958A1/en not_active Expired
- 1983-04-11 PT PT76535A patent/PT76535B/en not_active IP Right Cessation
- 1983-04-12 BE BE0/210537A patent/BE896440A/en unknown
- 1983-04-12 CH CH1966/83A patent/CH653681A5/en not_active IP Right Cessation
- 1983-04-14 LU LU84749A patent/LU84749A1/en unknown
- 1983-04-14 HU HU831307A patent/HU191831B/en unknown
- 1983-04-15 AU AU13573/83A patent/AU557065B2/en not_active Ceased
- 1983-04-18 DE DE3314028A patent/DE3314028C2/en not_active Expired - Lifetime
- 1983-04-18 ZA ZA832697A patent/ZA832697B/en unknown
- 1983-04-23 KR KR1019830001730A patent/KR900003281B1/en not_active IP Right Cessation
- 1983-05-04 IT IT48216/83A patent/IT1174758B/en active Protection Beyond IP Right Term
- 1983-05-09 GB GB08312702A patent/GB2132608B/en not_active Expired
- 1983-05-10 IE IE1074/83A patent/IE55097B1/en not_active IP Right Cessation
- 1983-05-11 NL NL8301693A patent/NL8301693A/en active Search and Examination
- 1983-05-20 JP JP58087836A patent/JPS59106483A/en active Granted
- 1983-06-09 NZ NZ204510A patent/NZ204510A/en unknown
- 1983-07-28 CA CA000433422A patent/CA1201442A/en not_active Expired
- 1983-08-08 AT AT2867/83A patent/AT392785B/en not_active IP Right Cessation
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Owner name: ROUSSEL-UCLAF TRANSFER- ROUSSEL UCLAF * ROUSSEL UC |
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Owner name: HOECHST MARION ROUSSEL TRANSFER- AVENTIS PHARMA S. |
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