FR2589151A1 - PROCESS FOR THE PREPARATION OF DIETHYLENE GLYCOL ESTERS - Google Patents

PROCESS FOR THE PREPARATION OF DIETHYLENE GLYCOL ESTERS Download PDF

Info

Publication number
FR2589151A1
FR2589151A1 FR8614922A FR8614922A FR2589151A1 FR 2589151 A1 FR2589151 A1 FR 2589151A1 FR 8614922 A FR8614922 A FR 8614922A FR 8614922 A FR8614922 A FR 8614922A FR 2589151 A1 FR2589151 A1 FR 2589151A1
Authority
FR
France
Prior art keywords
amino
diethylene glycol
ethyl
hydroxyethoxy
acid
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.)
Granted
Application number
FR8614922A
Other languages
French (fr)
Other versions
FR2589151B1 (en
Inventor
Aurelio Orjales Venero
Ramon Mosquera Pestana
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.)
Fabrica Espanola de Productos Quimicos y Farmaceuticos FAES SA
Original Assignee
Fabrica Espanola de Productos Quimicos y Farmaceuticos FAES SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fabrica Espanola de Productos Quimicos y Farmaceuticos FAES SA filed Critical Fabrica Espanola de Productos Quimicos y Farmaceuticos FAES SA
Publication of FR2589151A1 publication Critical patent/FR2589151A1/en
Application granted granted Critical
Publication of FR2589151B1 publication Critical patent/FR2589151B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/21Esters, e.g. nitroglycerine, selenocyanates
    • A61K31/215Esters, e.g. nitroglycerine, selenocyanates of carboxylic acids

Landscapes

  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

L'INVENTION A POUR OBJET UN PROCEDE DE PREPARATION D'ESTERS DU DIETYLENEGLYCOL, OBTENUS EN UNE SEULE ETAPE, C'EST-A-DIRE EN UTILISANT LE DIETHYLENEGLYCOL AVEC L'ACIDE CORRESPONDANT, DE FORMULE : (CF DESSIN DANS BOPI) DANS LAQUELLE N 0 OU 1, R H, CL OU CH, R H, CH OU CF ET R H OU CL OU SON SEL DE SODIUM OU DE POTASSIUM ET EN LUI AJOUTANT DU CHLORURE DE THIONYLE EN QUANTITES STOECHIOMETRIQUES PAR RAPPORT A L'ACIDE OU MEME EN QUANTITES SUPERIEURES, ET EN EFFECTUANT LA REACTION ENTRE LA TEMPERATURE AMBIANTE ET LE BAIN-MARIE. CETTE REACTION S'EFFECTUE SANS BESOIN DE PROTEGER LES HYDROXYLES DU DIETHYLENEGLYCOL.THE SUBJECT OF THE INVENTION IS A PROCESS FOR THE PREPARATION OF DIETYLENEGLYCOL ESTERS, OBTAINED IN A SINGLE STEP, THAT IS TO SAY BY USING DIETHYLENEGLYCOL WITH THE CORRESPONDING ACID, OF FORMULA: (CF DRAWING IN BOPI) IN WHICH N 0 OR 1, RH, CL OR CH, RH, CH OR CF AND RH OR CL OR ITS SODIUM OR POTASSIUM SALT AND ADDING THIONYL CHLORIDE IN STOECHIOMETRIC QUANTITIES IN RELATION TO ACID OR EVEN IN HIGHER QUANTITIES , AND PERFORMING THE REACTION BETWEEN THE AMBIENT TEMPERATURE AND THE WATERBATH. THIS REACTION TAKES PLACE WITHOUT THE NEED TO PROTECT THE HYDROXYLES OF DIETHYLENEGLYCOL.

Description

DESCRIPTION DE L'INVENTIONDESCRIPTION OF THE INVENTION

La présente invention concerne la préparation d'une série de monoesters du diéthytèneglycol, par un procédé courant, aux caractéristiques propres, qui Le rendent avantageux par rapport à  The present invention relates to the preparation of a series of monoesters of diethylene glycol, by a common method, with its own characteristics, which make it advantageous with respect to

d'autres procédés. En effet, la préparation de ces esters s'effec-  other methods. Indeed, the preparation of these esters is

tue en une seule étape, en utilisant le diéthylèneglycol et l'acide correspondant, et sans besoin de protéger l'un des hydroxyles du diéthylèneglycol. Pour que la réaction évolue favorablement, il faut ajouter, en plus de l'acide et du diéthyltneglycol, qui est utilisé en fort excès, du chlorure de thionyle, en quantité stoechiométrique par rapport à l'acide ou, dans certains cas,  kills in a single step, using the diethylene glycol and the corresponding acid, and without the need to protect one of the hydroxyl diethylene glycol. In order for the reaction to progress favorably, it is necessary to add, in addition to the excessively used acid and diethylene glycol, thionyl chloride, in stoichiometric quantities with respect to the acid or, in some cases,

légèrement supérieure.slightly higher.

Il est important de signaler que la réaction s'effectue de la même manière si l'on utilise au lieu de l'acide, un de ses  It is important to point out that the reaction is carried out in the same way if, instead of the acid, one of its

sels, par exemple le sel de sodium ou de potassium.  salts, for example the sodium or potassium salt.

La température de réaction est comprise entre la tempéra-  The reaction temperature is between the temperature

ture ambiante et celle du bain-marie, et elle est évidemment en rapport avec le temps nécessaire pour que La réaction soit complète. Les acides utilisés répondent à la formule générale I, i dans laquelle n= O ou 1, R peut être un atome d'hydrogène ou de chlore ou un groupe méthyle; R2 peut être un atome d'hydrogène ou un groupe méthyle ou trifluorométhyle; et R3 peut être un atome  and the temperature of the water bath, and is obviously related to the time required for the reaction to be complete. The acids used have the general formula I, wherein n = O or 1, R may be hydrogen, chlorine or methyl; R2 may be a hydrogen atom or a methyl or trifluoromethyl group; and R3 can be an atom

d'hydrogène ou de chlore.hydrogen or chlorine.

(CH2)n CO2H R3(CH2) n CO2H R3

\/ NH (I)\ / NH (I)

1 21 2

R R2R R2

On a donc fait réagir avec le diéthylèneglycol les acides suivants: acide 2-[(2,6-dichlorophényl)aminoJphénylacetique (n = 1, R = R = Cl, R2 = H), acide 2-[(3-trifluorométhytphényl)amino]benzoique (n = O, R = R =  The following acids were thus reacted with diethylene glycol: 2 - [(2,6-dichlorophenyl) amino] phenylacetic acid (n = 1, R = R = Cl, R 2 = H), 2 - [(3-trifluoromethylphenyl) amino acid) ] benzoic (n = O, R = R =

H, R2 = CF3),H, R2 = CF3),

acide 2-[(2,6-dichtoro-3-méthylphényl)amino]benzo;que (n = O, R = R3 = Ct, R2 = CH3), acide 2-[(2,3-diméthylphényl)aminolbenzo;que (n = O, R1 = R2 = CH3,  2 - [(2,6-dichloro-3-methylphenyl) amino] benzoic acid (n = O, R = R 3 = Ct, R 2 = CH 3), 2 - [(2,3-dimethylphenyl) amino) benzoic acid; (n = O, R1 = R2 = CH3,

R3 = H).R3 = H).

Comme on l'a déjà signalé, n'importe lequel des sels  As already mentioned, any of the salts

de sodium ou de potassium de ces acides réagit de façon semblable.  of sodium or potassium of these acids reacts similarly.

Les esters obtenus par réaction des acides cités plus haut et du diéthylèneglycol en présence du chlorure de thionyle sont les suivants:  The esters obtained by reaction of the acids mentioned above and diethylene glycol in the presence of thionyl chloride are the following:

2-f(2,6-dichlorophényl)amino]phénylacétate de 2-(2-hydroxyéthoxy)-  2- (2-hydroxyethoxy) 2- (2,6-dichlorophenyl) amino] phenylacetate

éthyle.ethyl.

2-[(3-trifluorométhylphényl)amino]benzoate de 2-(2-hydroxyéthoxy)-  2 - [(3-trifluoromethylphenyl) amino] benzoate 2- (2-hydroxyethoxy) -

éthyle.ethyl.

2-[(2,6-dichloro-3-méthylphényl)amino]benzoate de 2-(2-hydroxy-  2 - [(2,6-dichloro-3-methylphenyl) amino] benzoate 2- (2-hydroxy-

éthoxy)éthyle.ethoxy) ethyl.

2-[(2,3-diméthylphényl)aminolbenzoate de 2-(2-hydroxyéthoxy)éthyle.  2- (2-hydroxyethoxy) ethyl 2 - [(2,3-dimethylphenyl) aminolbenzoate.

On isole les produits bruts de la réaction du diéthylène-  Crude products are isolated from the reaction of diethylene

glycol avec les acides représentés par la formule générale I, dans i 2 3 laquelle n, R1, R et R ont la signification décrite plus haut, en présence du chlorure de thionyle, en ajoutant de l'eau et de l'éther éthylique, puisqu'ils sont très solubles dans le solvant organique. On les purifie en les faisant passer à travers une colonne remplie de gel de silice. Après chromatographie sur colonne, ils présentent une seule tache en chromatographie sur couche mince, lorsque l'on utilise des plaques à support de gel de silice silicagel 60 F254" du chloroforme et que l'on visualise la 254 uctrfree u 'onvsaiet  glycol with the acids represented by the general formula I, wherein n, R1, R and R have the meaning described above, in the presence of thionyl chloride, by adding water and ethyl ether, since they are very soluble in the organic solvent. They are purified by passing them through a column filled with silica gel. After column chromatography, they show a single spot in thin layer chromatography, when silica gel silica gel 60 F254-chloroform silica support plates are used and the 254 uctrfree u 'onvsaiet is visualized.

lumière de longueur d'onde 254 nm.light of wavelength 254 nm.

Ils présentent également un pic unique en chromatographie liquide à haute pression. D'autre part, les spectres de RMN de 1H sont ceux que l'on attend pour ces composés. Ils présentent tous la  They also have a unique peak in high pressure liquid chromatography. On the other hand, the 1H NMR spectra are those expected for these compounds. They all present the

bande correspondant au groupe ester dans les spectres IR.  band corresponding to the ester group in the IR spectra.

Les exemples suivants illustrent l'invention sans toute-  The following examples illustrate the invention without any

fois en limiter la portée.limit its scope.

Exemple 1 - Préparation du 2-[(2,6-dichlorophényl)amino]phényLacé-  Example 1 - Preparation of 2 - [(2,6-dichlorophenyl) amino] phenylacetate

tate de 2-(2-hydroxyéthoxy)éthyle2- (2-hydroxyethoxy) ethyl acetate

A 180 ml de diéthylèneglycol sec, on ajoute 4 ml de chlo-  To 180 ml of dry diethylene glycol, 4 ml of chlorine are added.

rure de thionyle et, peu après, on introduit 15 g de 2-[(2,6-di-  of thionyl and shortly thereafter 15 g of 2 - [(2,6-di-

chlorophényL)aminojphénylacétate de sodium. Le mélange est agité à la température ambiante, puis l'on ajoute 200 ml d'eau et 250 ml d'éther éthylique; après avoir agité les deux phases, on sépare la couche aqueuse et on lave la couche organique successivement par l'eau, par la soude aqueuse et par l'eau. On sèche La solution  sodium chlorophenyl) aminophenylacetate. The mixture is stirred at room temperature, then 200 ml of water and 250 ml of ethyl ether are added; after stirring the two phases, the aqueous layer is separated and the organic layer is washed successively with water, with aqueous sodium hydroxide and with water. The solution is dried

éthérée sur sulfate de sodium et on élimine l'éther par distilla-  ethereal over sodium sulphate and the ether is distilled off

tion. Le résidu obtenu, à l'aspect huileux, est purifié par passage  tion. The resulting residue, oily in appearance, is purified by passage

sur une colonne chromatographique garnie de gel de silice et éLu-  on a chromatographic column packed with silica gel and

tion par le chloroforme. Apres élimination du solvant, on obtient 16,5 g (86 %) d'une huile légèrement jaune, correspondant au  chloroform. After removal of the solvent, 16.5 g (86%) of a slightly yellow oil, corresponding to

produit recherché). (ester) = 1 720 cm-1.  sought product). (ester) = 1720 cm-1.

Exemple 2 - Préparation du 2-[(3-trifluorométhylphényl)amino]benzo-  Example 2 - Preparation of 2 - [(3-trifluoromethylphenyl) amino] benzoate

ate de 2-(2-hydroxyéthoxy)éthyle A 80 l de diéthylèneglycol sec, on ajoute 3 l de chlorure  2- (2-hydroxyethoxy) ethyl acetate To 80 l of dry diethylene glycol, add 3 l of chloride

de thionyle et 10 kg d'acide 2-[(3-trifluorométhylphényl)amino]-  of thionyl and 10 kg of 2 - [(3-trifluoromethylphenyl) amino] -

benzo;que. On chauffe le mélange au bain-marie pendant 6 h. On refroidit la solution obtenue, de couleur vert foncé; on y ajoute alors de l'eau et de l'éther éthylique et on traite le produit de  benzo; that. The mixture is heated in a water bath for 6 hours. The solution obtained is cooled to a dark green color; water and ethyl ether are added and the product is treated.

façon semblable à ce qui est décrit à l'exemple 1. Après purifica-  similar to that described in Example 1. After purification

tion du produit, on obtient 7,8 kg (59 %) de produit huileux de  of the product, 7.8 kg (59%) of oily

couleur jaune clair. (ester) = 1 683 cm-1.  light yellow color. (ester) = 1683 cm -1.

Claims (5)

REVENDICATIONS 1. Procédé de préparation d'esters du diéthylèneglycol,  1. Process for preparing esters of diethylene glycol caractérisé en ce que t'on fait réagir directement le diéthylène-  characterized in that diethylene is reacted directly glycol avec les acides de formule générale I R3  glycol with the acids of general formula I R3 (CH) CO H R(CH) CO H R 2n 22n 2 NH (/)NH (/) o n =O ou R =R H, Cl ou CH R H, CH ou CF et R3 = H ou  o n = O or R = R H, Cl or CH R H, CH or CF and R3 = H or 31 3 331 3 3 Cl ou avec leurs sels de sodium et de potassium.  Cl or with their sodium and potassium salts. 2. Procédé seton la revendication précédente, caractérisé en ce que la réaction est effectuée en présence de chlorure de thionyle.  2. Method according to the preceding claim, characterized in that the reaction is carried out in the presence of thionyl chloride. 3. Procédé selon l'une quelconque des revendications  3. Process according to any one of the claims précédentes, caractérisé en ce que la température de la réaction  preceding, characterized in that the temperature of the reaction est comprise entre la température ambiante et celle du bain-marie.  is between room temperature and that of the water bath. 4. Procédé selon l'une quelconque des revendications  4. Method according to any one of the claims précédentes, caractérisé en ce que les acides employés sont l'acide  previous ones, characterized in that the acids employed are the acid 2-[(2,6-dichlorophényl)amino]phénylacétique, l'acide 2-[(3-trifluo-  2 - [(2,6-dichlorophenyl) amino] phenylacetic acid, 2 - [(3-trifluoromethyl) rométhylphényl)amino]-benzoique, l'acide 2-[(2,6-dichloro-3-méthyl-  romethylphenyl) amino] benzoic acid, 2 - [(2,6-dichloro-3-methyl) phényl)amino]benzoîque et l'acide 2-[(2,3-diméthylphényl)amino]-  phenyl) amino] benzoic acid and 2 - [(2,3-dimethylphenyl) amino] - benzoique.benzoic. 5. Procédé selon l'une quelconque des revendications  5. Process according to any one of the claims précédentes, caractérisé en ce que les esters du diéthylèneglycol préparés sont: le 2-[(2,6-dichlorophényl)amino]phénylacétate de  in which the diethylene glycol esters prepared are: 2 - [(2,6-dichlorophenyl) amino] phenylacetate; 2-(2-hydroxyéthoxy)éthyle, le 2-[(3-trifluorométhylphényl)amino]-  2- (2-hydroxyethoxy) ethyl, 2 - [(3-trifluoromethylphenyl) amino] - benzoate de 2-(2-hydroxyéthoxy)éthyle, le 2-[(2,6-dichloro-3-mé-  2- (2-hydroxyethoxy) ethyl benzoate, 2 - [(2,6-dichloro-3-methyl) -2- thylphényl)amino]benzoate de 2-(2-hydroxyéthoxy)éthyle et le 2-[(2,  2- (2-hydroxyethoxy) ethyl thylphenyl) amino] benzoate and 2 - [(2, 3-diméthylphényl)amino]benzoate de 2-(2-hydroxyéthoxy)éthyle.  2- (2-hydroxyethoxy) ethyl 3-dimethylphenyl) amino] benzoate.
FR868614922A 1985-10-25 1986-10-27 PROCESS FOR THE PREPARATION OF DIETHYLENEGLYCOL ESTERS Expired - Lifetime FR2589151B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES548226A ES8605220A1 (en) 1985-10-25 1985-10-25 Esters of diethylene glycol

Publications (2)

Publication Number Publication Date
FR2589151A1 true FR2589151A1 (en) 1987-04-30
FR2589151B1 FR2589151B1 (en) 1990-05-18

Family

ID=8490031

Family Applications (1)

Application Number Title Priority Date Filing Date
FR868614922A Expired - Lifetime FR2589151B1 (en) 1985-10-25 1986-10-27 PROCESS FOR THE PREPARATION OF DIETHYLENEGLYCOL ESTERS

Country Status (9)

Country Link
JP (1) JPS62106064A (en)
BE (1) BE905666A (en)
CH (1) CH676238A5 (en)
DE (1) DE3636125A1 (en)
ES (1) ES8605220A1 (en)
FR (1) FR2589151B1 (en)
GB (1) GB2182041B (en)
IT (1) IT1197255B (en)
PT (1) PT81505B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3811118C1 (en) * 1988-03-31 1989-10-12 Merckle Gmbh, 7902 Blaubeuren, De
US9217066B2 (en) 2008-03-31 2015-12-22 Ford Global Technologies, Llc Structural polymer insert and method of making the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2735569A1 (en) * 1977-08-06 1979-02-15 Troponwerke Gmbh & Co Kg Antiinflammatory and antirheumatic agent prodn. - esp. N-tri:fluoro:methyl-phenyl-anthranilic acid hydroxy-ethoxy-ethyl ester
DE2834168A1 (en) * 1978-08-04 1980-02-21 Troponwerke Gmbh & Co Kg METHOD FOR PRODUCING 2- (2-HYDROXYAETHOXY) AETHYL-N- (ALPHA, ALPHA, ALPHA -TRIFLUOR-M-TOLYL) ANTHRANILATE
DE2834167A1 (en) * 1978-08-04 1980-02-21 Troponwerke Gmbh & Co Kg Hydroxy-ethoxy-ethyl-N-tri:fluoromethyl-phenyl anthranilate prodn. - by direct esterification of acid with di:ethylene glycol, useful as pharmaceutical
DE2834169A1 (en) * 1978-08-04 1980-02-21 Troponwerke Gmbh & Co Kg Hydroxy-ethoxy-ethyl N-tri:fluoromethyl-phenyl anthranilate prodn. - by converting corresp. acid to halide, then reaction with di:ethylene glycol
EP0149427A1 (en) * 1983-12-20 1985-07-24 Ciba-Geigy Ag (Poly-)Oxyalkylamino diphenyl ethers having herbicidal activity

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1939112C3 (en) * 1969-08-01 1975-03-06 Troponwerke Dinklage & Co, 5000 Koeln Esters of N- (3-trifluoromethylphenyl) anthranilic acid, process for their preparation and pharmacologically active preparations thereof
DE2926472A1 (en) * 1979-06-30 1981-01-15 Thomae Gmbh Dr K NEW BENZOYL DERIVATIVES, THEIR PRODUCTION AND THEIR USE AS MEDICINAL PRODUCTS
IL67445A (en) * 1982-12-09 1985-11-29 Teva Pharma Ethoxycarbonyloxy ethyl esters of non-steroidal anti-inflammatory carboxylic acids
DE3476550D1 (en) * 1983-07-21 1989-03-09 Troponwerke Gmbh & Co Kg Thermoplastics containing antiphlogistics
DE3407507A1 (en) * 1984-03-01 1985-09-05 A. Nattermann & Cie GmbH, 5000 Köln Novel o-(2,6-dichloroanilino)phenylacetic acid esters, process for their preparation, and pharmaceutical preparations containing them

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2735569A1 (en) * 1977-08-06 1979-02-15 Troponwerke Gmbh & Co Kg Antiinflammatory and antirheumatic agent prodn. - esp. N-tri:fluoro:methyl-phenyl-anthranilic acid hydroxy-ethoxy-ethyl ester
DE2834168A1 (en) * 1978-08-04 1980-02-21 Troponwerke Gmbh & Co Kg METHOD FOR PRODUCING 2- (2-HYDROXYAETHOXY) AETHYL-N- (ALPHA, ALPHA, ALPHA -TRIFLUOR-M-TOLYL) ANTHRANILATE
DE2834167A1 (en) * 1978-08-04 1980-02-21 Troponwerke Gmbh & Co Kg Hydroxy-ethoxy-ethyl-N-tri:fluoromethyl-phenyl anthranilate prodn. - by direct esterification of acid with di:ethylene glycol, useful as pharmaceutical
DE2834169A1 (en) * 1978-08-04 1980-02-21 Troponwerke Gmbh & Co Kg Hydroxy-ethoxy-ethyl N-tri:fluoromethyl-phenyl anthranilate prodn. - by converting corresp. acid to halide, then reaction with di:ethylene glycol
EP0149427A1 (en) * 1983-12-20 1985-07-24 Ciba-Geigy Ag (Poly-)Oxyalkylamino diphenyl ethers having herbicidal activity

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ARZNEIMITTELFORSCHUNG *

Also Published As

Publication number Publication date
GB8625481D0 (en) 1986-11-26
FR2589151B1 (en) 1990-05-18
CH676238A5 (en) 1990-12-28
GB2182041A (en) 1987-05-07
PT81505B (en) 1987-11-11
GB2182041B (en) 1989-09-20
IT8621774A0 (en) 1986-09-19
IT8621774A1 (en) 1988-03-19
IT1197255B (en) 1988-11-30
ES548226A0 (en) 1986-03-16
ES8605220A1 (en) 1986-03-16
BE905666A (en) 1987-02-16
JPS62106064A (en) 1987-05-16
DE3636125A1 (en) 1987-04-30
PT81505A (en) 1985-12-01

Similar Documents

Publication Publication Date Title
EP0245156B1 (en) Preparation of fibrates
FR2658513A1 (en) PROCESS FOR THE PREPARATION OF CIS-BETA-PHENYLGLYCIDIC- (2R, 3R) ACID.
EP0139584A2 (en) Imidazoline derivatives, their preparation and therapeutical use
EP0002978B1 (en) Thiazolidinedione-2,4 derivatives, their preparation and pharmaceutical applications
EP0581980B1 (en) 3- and/or 4-substituted derivatives of quinic acid and process to prepare 3- and/or 4-substituted derivatives of quinic acid
CH627149A5 (en) Process for the preparation of lower alkyl esters of racemic cis- or trans-3-formyl-2,2-disubstituted-1-cyclopropanecarboxylic acids
FR2589151A1 (en) PROCESS FOR THE PREPARATION OF DIETHYLENE GLYCOL ESTERS
EP0251938B1 (en) Stereospecific process for the synthesis of indole derivatives
CH615414A5 (en)
EP1205476A1 (en) Process for the synthesis of N-(mercaptoacyl)-amino acids derivatives from alpha-substituted acrylic acids
CH630893A5 (en) PROCESS FOR THE PREPARATION OF O- (2,6-DICHLOROANILINO) PHENYLACETAMIDES N, N-DISUBSTITUES.
EP0354093A1 (en) Piperazine derivatives and process for their preparation
AU632117B2 (en) Improved process for the preparation of ketone compounds
FR2511007A1 (en) PROCESS FOR THE PREPARATION OF URSODESOXYCHOLIC ACID FROM 3A, 7B, 12A-TRIHYDROXYCHOLANIC ACID AND INTERMEDIATE PRODUCT USED
FR2560873A1 (en) PIPERIDINE DERIVATIVE MEDICINES, NOVEL PIPERIDINE DERIVATIVES AND METHODS FOR PREPARING THE SAME
EP0363263B1 (en) Process for the preparation of propionic-acid derivatives
EP0433267A2 (en) Process for preparing eicosatetraynoic acid
EP0030505B1 (en) Lactones substituted by an amino-acid residue, their preparation and their use in the separation of said lactones or amino acids
FR2492373A1 (en) 1,8-DIHYDROXY ANTHRONE-9 ADDUCTS AND THEIR USE IN HUMAN OR VETERINARY MEDICINE AND COSMETICS
CH640532A5 (en) CARBOXYLIC PYRROLE-1 AND PYRROLIDINE-1 ACID DERIVATIVES AND THEIR PREPARATION PROCESS.
FR2497796A1 (en) CHLOROFORMIATES OF ALKYL ESTERS OF C-ALKYL-TARTRONIC ACIDS AND PROCESS FOR THEIR PREPARATION
CH632768A5 (en) PROCESS FOR OBTAINING N, N'-BIS- (3-OXAZOLIDINYL-2-ONE) -P-SUBSTITUTED PHOSPHORAMIDES AND N, N'-BIS- (3-OXAZOLIDINYL-2-ONE) -P-SUBSTITUTED PHOSPHORAMIDES .
FR2541678A1 (en) NEW ISOXAZOLES AND PROCESS FOR THEIR MANUFACTURE
JPH01163154A (en) Production of tetrahydrophthalimide based compound, intermediate thereof and production of said intermediate
FR2727681A1 (en) PROCESS FOR THE PREPARATION OF PYRROLIZINE DERIVATIVES

Legal Events

Date Code Title Description
ST Notification of lapse