CH311625A - Process for the production of a new basic substituted fatty acid (2-halogen-6-methyl-anilide). - Google Patents
Process for the production of a new basic substituted fatty acid (2-halogen-6-methyl-anilide).Info
- Publication number
- CH311625A CH311625A CH311625DA CH311625A CH 311625 A CH311625 A CH 311625A CH 311625D A CH311625D A CH 311625DA CH 311625 A CH311625 A CH 311625A
- Authority
- CH
- Switzerland
- Prior art keywords
- anilide
- methyl
- halogen
- fatty acid
- production
- Prior art date
Links
Description
verfahren zur Herstellung eines neuen basisch substituierten Fettsäure- (2-halogen-f -methyl-anilids). Gegenstand des vorliegenden Patentes bil det ein Verfahren zur Herstellung eines neuen basisch substituierten Fettsäiire-(2-halogen-6- meth@#1-anilids), welches dadurch gekennzeich net ist, dass man eine Verbindung der Formel
EMI0001.0010
in welcher X einen reaktionsfähigen, während der Reaktion sich abspaltenden Rest. bedeutet, mit Pyrrolidin umsetzt.
Der Rest X kann in einem Halogenatom oder einem sonstigen für den Austausch gegen den basischen Rest geeigneten reaktionsfähi gen Substituenten, wie z. B. einer Alky1sul- fonyloxy- oder Arylsulfonyloxygi-LLippe, beste hen. Der Austausch der Gruppe X gegen den Pyrrolidinrest erfolgt z. B. durch einfaches Erwärmen mit Pyrrolidin gegebenenfalls in Gegenwart eines basisch reagierenden Konden sationsmittels oder von Pyrrolidin im Über schoss.
Das ss-Pyrrolidino-propionsäure- (2- chlor-6-methyl-anilid) isst ein Öl, das- nach einiger Zeit zu farblosen, bei 80 schmelzenden Kristallen erstarrt. Das Hydrochlorid der Base schmilzt bei 156-157 .
Das neue Anilid soll als Lokalanästhetikum und als Zwischenprodukt zur Herstellung wei terer Derivate Verwendung finden. <I>Beispiel:</I> 31 Gewichtsteile P-Chlor-propionsäure-(2- chlor-6-methyl-anilid) (gewonnen durch Um setzen von 2-Chlor-6-methyl-anilin mit ss-Chlor- propionyl-chlorid in Gegenwart von Natrium acetat, Schmp. 109-112 )
werden in 80 Ge wichtsteilen Äthanol suspendiert und mit 30 Gewichtsteilen Pyrrolidin versetzt. Die Tem peratur steigt dabei leicht an und ein grosser Teil des Reaktionsgemisches geht in Lösung. NTun wird während 4 Stunden bei Zimmer temperatur gerührt und dann einige Stunden bei Siedetemperatur. Man versetzt mit Wasser und nimmt, das sich abscheidende Öl in Äther auf.
Nach dem Trocknen der ätherischen Lö sung und Verjagen des Lösungsmittels ver bleibt ein Öl, das durch Überführen in das Hydrochlorid gereinigt wird. Man erhält 35 Gewichtsteile reines ss-P,vrTolidino-propion- säure-(2-ehlor-6-methyl-anilid). Die Umset zung mit. Py rrolidin kann aueh in Benzol stattfinden.
process for the production of a new basic substituted fatty acid (2-halogen-f-methyl anilide). The subject of the present patent bil det a process for the preparation of a new basic substituted Fettsäiire- (2-halogen-6-meth @ # 1-anilide), which is characterized in that a compound of the formula
EMI0001.0010
in which X is a reactive radical which is split off during the reaction. Reacts with pyrrolidine.
The radical X can be in a halogen atom or other suitable reactive substituents for replacement with the basic radical, such as. B. an Alky1sulfonyloxy- or Arylsulfonyloxygi-LLippe, best hen. The exchange of the group X against the pyrrolidine radical takes place, for. B. by simply heating with pyrrolidine, optionally in the presence of a basic condensation agent or pyrrolidine in the over shot.
The ss-pyrrolidino-propionic acid- (2-chloro-6-methyl-anilide) eats an oil that solidifies after some time to colorless crystals that melt at 80. The base hydrochloride melts at 156-157.
The new anilide is to be used as a local anesthetic and as an intermediate for the production of further derivatives. <I> Example: </I> 31 parts by weight of P-chloro-propionic acid (2-chloro-6-methyl-anilide) (obtained by reacting 2-chloro-6-methyl-aniline with ss-chloropropionyl chloride in the presence of sodium acetate, m.p. 109-112)
are suspended in 80 parts by weight of ethanol and treated with 30 parts by weight of pyrrolidine. The temperature rises slightly and a large part of the reaction mixture goes into solution. NTun is stirred for 4 hours at room temperature and then for a few hours at boiling temperature. Water is added and the oil which separates out is taken up in ether.
After the ethereal solution has dried and the solvent has been driven off, an oil remains that is purified by converting it into the hydrochloride. 35 parts by weight of pure SS-P, vrTolidino-propionic acid (2-chloro-6-methyl-anilide) are obtained. Implementation with. Pyrrolidine can also take place in benzene.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH311625T | 1952-02-25 | ||
CH307799T | 1952-11-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH311625A true CH311625A (en) | 1955-11-30 |
Family
ID=25735358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH311625D CH311625A (en) | 1952-02-25 | 1952-02-25 | Process for the production of a new basic substituted fatty acid (2-halogen-6-methyl-anilide). |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH311625A (en) |
-
1952
- 1952-02-25 CH CH311625D patent/CH311625A/en unknown
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