BE482003A - - Google Patents
Info
- Publication number
- BE482003A BE482003A BE482003DA BE482003A BE 482003 A BE482003 A BE 482003A BE 482003D A BE482003D A BE 482003DA BE 482003 A BE482003 A BE 482003A
- Authority
- BE
- Belgium
- Prior art keywords
- acid
- amide
- benzilic
- weight
- parts
- Prior art date
Links
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 claims description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- UKXSKSHDVLQNKG-UHFFFAOYSA-N benzilic acid Chemical class C=1C=CC=CC=1C(O)(C(=O)O)C1=CC=CC=C1 UKXSKSHDVLQNKG-UHFFFAOYSA-N 0.000 claims description 5
- 150000001408 amides Chemical class 0.000 claims description 3
- 229940087675 benzilic acid Drugs 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- REQXYFLFNBBIRX-UHFFFAOYSA-N 2-hydroxy-2,2-diphenylacetamide Chemical compound C=1C=CC=CC=1C(O)(C(=O)N)C1=CC=CC=C1 REQXYFLFNBBIRX-UHFFFAOYSA-N 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- DLFVBJFMPXGRIB-UHFFFAOYSA-M ethanimidate Chemical compound CC([O-])=N DLFVBJFMPXGRIB-UHFFFAOYSA-M 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 206010015037 epilepsy Diseases 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N isopropyl alcohol Natural products CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 208000024891 symptom Diseases 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- OAWAAMJYWXIJGI-UHFFFAOYSA-N CC(NC(C(C1=CC=CC=C1)(C1=CC=CC=C1)OC(C)=O)=O)=O Chemical compound CC(NC(C(C1=CC=CC=C1)(C1=CC=CC=C1)OC(C)=O)=O)=O OAWAAMJYWXIJGI-UHFFFAOYSA-N 0.000 description 1
- 208000005374 Poisoning Diseases 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000002252 acyl group Chemical group 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 230000003556 anti-epileptic effect Effects 0.000 description 1
- 230000002921 anti-spasmodic effect Effects 0.000 description 1
- 239000001961 anticonvulsive agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229940125717 barbiturate Drugs 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical group CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000002648 merrit Nutrition 0.000 description 1
- 244000087976 merrit Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000002917 oxazolidines Chemical class 0.000 description 1
- DDBREPKUVSBGFI-UHFFFAOYSA-N phenobarbital Chemical compound C=1C=CC=CC=1C1(CC)C(=O)NC(=O)NC1=O DDBREPKUVSBGFI-UHFFFAOYSA-N 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 1
- 235000015497 potassium bicarbonate Nutrition 0.000 description 1
- 239000011736 potassium bicarbonate Substances 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Landscapes
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Medicinal Preparation (AREA)
Description
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Procédé de préparation d'un dérivé de l'acide benzilique.
A la recherche d'un antiépileptique n'ayant pas de propriétés soporatives, on a proposé, depuis l'introduction de l'acide phényl -éthyl-barbiturique, différents composés faisant partie des groupes des barbituriques, des hydantolnes, des oxazolidines, etc. Toutefois, ces produits ne sont pas satisfaisants, soit qu' ils ne conviennent que pour des cas
<Desc/Clms Page number 2>
d'épilepsie plutôt bénins, soit que leur administration continuelle soit accompagnée de symptômes secondaires indésirables.
Un nouveau dérivé, lequel présente des avantages remarquables pour le traitement de l'épilepsie, a été trouvé dans l'acétylamide de l'acide -acétoxy-diphényl-acétique, dont la formule est la suivante:
EMI2.1
L'objet de l'invention présente est un procédé de préparation de l'acétylamide de l'acide [alpha]-acétoxy-diphényl- acétique, caractérisé par le fait que l'on fait réagir l'amide de l'acide benzilique avec de l'anhydride acétique en présence d'acide sulfurique.
EMI2.2
L'acétylamide de l'acide -acétoxy-diphényl-acétique cristallise sous forme d'aiguilles brillantes, incolores, qui fondent à 143 C. Il est aisément soluble dans les solvants habituels, insoluble dans l'eau, pratiquement insipide et réagit de façon neutre. Le nouveau dérivé sera utilisé comme médicament.
Il n'était pas à prévoir que l'amide de l'acide ben- zilique, sous des conditions de réaction relativement douces, serait acétylé non seulement au groupe [alpha]-hydroxy, mais en même temps à l'atome du radical amide. Le composé, obtenu par le traitement de l'amide benzilique avec l'anhydride acétique, sous l'influence catalytique d'acide sulfurique concentré, à une température légèrement surélevée, malgré un groupe amino portant deux restes acyle, est remarquablement stable ;
<Desc/Clms Page number 3>
craindre une saponification, l'anhydride acétique en excès peut être décomposé au moyen d'une solution aqueuse de bicarbonate.
Merrit et Putnam, Epilepsia [1943],6,3, p. 55, ont rendu attentif à l'action antispasmodique de l'amide de l'acide benzilique. Comparé à ce dérivé, l'acétylamide de l'acide [alpha]- acétoxy-diphényl-acétique présente des avantages inattendus: la toxicité est très minime; la souris supporte 5 g par kilo, sans symptômes d'empoisonnement. La marge thérapeutique en est très grande. De fortes doses de ce produit n'ayant pratiquement aucune saveur, peuvent être administrées sans le déclenchement d'effets indésirables.
Exemple.
200 parties en poids d'amide de l'acide benzilique sont mélangées à 500 parties en poids d'anhydride acétique, puis 5,5 parties en poids d'acide sulfurique concentré (d=1,84) sont ajoutées à la suspension en 5 minutes. Pendant que l'amide benzilique se dissout rapidement, la température du mélange s'élève à environ 65 C. La solution, de couleur jaune-clair, est agitée encore pendant 2 heures ; température s'abaisse lentement. Ensuite, on laisse reposer pendant 15 heures à une température de 20 C.
La solution est versée, en agitant, sur 1000 parties en poids d'eau et 500 parties en poids de glace pilée et, en- suite, sont ajoutées environ 500 parties en poids de bicarbonate de potassium afin de faciliter la destruction de l'anhydride acétique en excès. A la fin, la solution doit être légèrement acide au papier de tournesol. L'acétylamide de l'acide [alpha]-acétexy- diphényl-acétique se sépare sous forme de cristaux. Il es séparé et recristallisé dans du méthanol, du benzène, de l'alcool iso- propylique ou de l'acide acétique dilué.
<Desc / Clms Page number 1>
Process for the preparation of a derivative of benzilic acid.
In search of an antiepileptic having no soporative properties, it has been proposed, since the introduction of phenyl-ethyl-barbituric acid, various compounds belonging to the groups of barbiturates, hydantolnes, oxazolidines, etc. However, these products are not satisfactory, or they are only suitable for cases
<Desc / Clms Page number 2>
rather mild epilepsy, or their continued administration is accompanied by undesirable secondary symptoms.
A new derivative, which has remarkable advantages for the treatment of epilepsy, has been found in acetylamide of -acetoxy-diphenyl-acetic acid, the formula of which is as follows:
EMI2.1
The object of the present invention is a process for preparing [alpha] -acetoxy-diphenyl-acetic acid acetylamide, characterized in that the amide of benzilic acid is reacted with acetic anhydride in the presence of sulfuric acid.
EMI2.2
Acetoxy-diphenyl-acetic acid acetylamide crystallizes in the form of shiny, colorless needles which melt at 143 C. It is readily soluble in usual solvents, insoluble in water, practically tasteless and reacts well. neutral. The new derivative will be used as a medicine.
It was not expected that the amide of benzilic acid, under relatively mild reaction conditions, would be acetylated not only at the [alpha] -hydroxy group, but at the same time at the atom of the amide group. . The compound, obtained by the treatment of benzilic amide with acetic anhydride, under the catalytic influence of concentrated sulfuric acid, at a slightly elevated temperature, despite an amino group bearing two acyl residues, is remarkably stable;
<Desc / Clms Page number 3>
fear of saponification, excess acetic anhydride can be decomposed by means of an aqueous solution of bicarbonate.
Merrit and Putnam, Epilepsia [1943], 6.3, p. 55, paid attention to the antispasmodic action of benzilic acid amide. Compared to this derivative, [alpha] - acetoxy-diphenyl-acetic acid acetylamide has unexpected advantages: the toxicity is very minimal; the mouse supports 5 g per kilo, without symptoms of poisoning. The therapeutic margin is very large. Large doses of this product, having virtually no flavor, can be administered without the onset of adverse effects.
Example.
200 parts by weight of benzilic acid amide are mixed with 500 parts by weight of acetic anhydride, then 5.5 parts by weight of concentrated sulfuric acid (d = 1.84) are added to the suspension in 5 minutes. While the benzilic amide dissolves rapidly, the temperature of the mixture rises to about 65 C. The solution, light yellow in color, is stirred for a further 2 hours; temperature drops slowly. Then it is left to stand for 15 hours at a temperature of 20 C.
The solution is poured, with stirring, onto 1000 parts by weight of water and 500 parts by weight of crushed ice and, then, about 500 parts by weight of potassium bicarbonate are added in order to facilitate the destruction of the anhydride. excess acetic. At the end, the solution should be slightly acidic to litmus paper. [Alpha] -acetexy-diphenyl-acetic acid acetylamide separates out as crystals. It is separated and recrystallized from methanol, benzene, isopropyl alcohol or dilute acetic acid.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE482003A true BE482003A (en) |
Family
ID=128822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE482003D BE482003A (en) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE482003A (en) |
-
0
- BE BE482003D patent/BE482003A/fr unknown
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