CH311615A - 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
- CH311615A CH311615A CH311615DA CH311615A CH 311615 A CH311615 A CH 311615A CH 311615D A CH311615D A CH 311615DA CH 311615 A CH311615 A CH 311615A
- 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-6-methyl-anilids). Gegenstand des vorliegenden Patentes bil det ein Verfahren zur Herstellung eines neuen basisch substituierten Pettsäure-(2-halogen-6- methyl-a.nilids),welches dadurch gekennzeich net ist, dass man eine Verbindung der Formel
EMI0001.0004
in welcher K einen reaktionsfähigen, während <I>der</I> Reaktion sich abspaltenden Rest bedeutet, mit Pyrrolidin umsetzt.
Der Rest Y kann in einem Halogenatom oder einem sonstigen für den Austausch gegen den basiseben Rest geeigneten reaktionsfähi gen Substit.uenten, wie z. B. einer Alky1sul- fonyloxy- oder Arylsulfonyloxygruppe, beste hen. Der Austausch der Gruppe Y gegen den Pyrrolidinrest erfolgt z.
B. durch einfaches Erwärmen mit. Pyrrolidin gegebenenfalls in C#egyenwart eines basisch reagierenden Konden sationsmittels oder von Pv rr olidin im Über- srhuss. Das N-Pyrrolidino-acet-(2-chlor-6-me- tlryl-anilid) ist. ein Öl, das nach einiger Zeit zu farblosen, bei 84-85 schmelzenden Kristallen erstarrt.
Das Hydrochlorid der Base schmilzt bei 172-173 , das Succinat bei 178-181 , das llethansulfat bei 146,5-1.48,5 und das Ma.leat bei 168-1711'.
Das neue Anilid soll als Lokalanästhetikum und als Zwischenprodukt zur Herstellung wei terer Derivate Verwendung finden.
Beispiel: 44 Gewichtsteile Chloracet-(2-chlor-6-me- thyl-a.nilid) (gewonnen durch Umsetzen von 2-Chlor-6-methyl-anilin mit Chloracetylehlorid in Gegenwart von Natriumacetat, Schmp. 140 bis 141 ) werden in 80 Gewichtsteilen Äthanol suspendiert und mit 40 Gewichtsteilen Pyrro- lidin versetzt.
Die Temperatur steigt dabei leicht an und ein grosser Teil des Reaktions gemisches geht. in Lösung. Nun wird während 4 Stunden bei Zimmertemperatur gerührt und dann einige Stunden bei Siedetemperatur. Eine Probe mit WTasser und nachfolgend mit. verdünnter Salzsäure versetzt, ergibt. wieder Lösung des ausgefallenen Niederschlages. Mit Wasserdampf wird hierauf der Alkohol und das überschüssige Pyrrolidin abgeblasen und nach dem Erkalten das zurückbleibende Öl in Äther aufgenommen. Nach dem Trocknen der ätherischen Lösung und Verjagen des Lö sungsmittels verbleibt ein Öl, das durch Vakuumdestillation gereinigt. wird.
Man er hält 43 Gewichtsteile reines N-Pyrrolidino- acet-(2-chlor-6-methyl-a.nilid), was einer Aus beute von 84 /o entspricht. Die Umsetzung mit Pvrrolidin kann auch in Benzol stattfinden.
Process for the production of a new basic substituted fatty acid. (2-halo-6-methyl-anilide). The subject of the present patent bil det a process for the preparation of a new basic substituted fatty acid (2-halogen-6-methyl-a.nilids), which is characterized in that a compound of the formula
EMI0001.0004
in which K means a reactive radical which is split off during <I> the </I> reaction, with pyrrolidine.
The radical Y can be in a halogen atom or any other reactive substituents suitable for replacement with the basic radical, such as e.g. B. an alky1sulfonyloxy or arylsulfonyloxy group, best hen. The exchange of the group Y against the pyrrolidine radical takes place z.
B. by simply heating with. Pyrrolidine, if necessary in the presence of a basic condensing agent or an excess of PVC olidine. The N-pyrrolidino-acet- (2-chloro-6-methyl-anilide) is. an oil that solidifies after some time to colorless crystals that melt at 84-85.
The hydrochloride of the base melts at 172-173, the succinate at 178-181, the ethane sulfate at 146.5-1.48.5 and the ma.leate at 168-1711 '.
The new anilide is to be used as a local anesthetic and as an intermediate for the production of further derivatives.
Example: 44 parts by weight of chloroacet- (2-chloro-6-methyl-a.nilide) (obtained by reacting 2-chloro-6-methyl-aniline with chloroacetyl chloride in the presence of sodium acetate, melting point 140 to 141) are used in 80 parts by weight of ethanol are suspended and 40 parts by weight of pyrrolidine are added.
The temperature rises slightly and a large part of the reaction mixture goes. in solution. The mixture is then stirred for 4 hours at room temperature and then for a few hours at boiling temperature. A sample with water and then with. added dilute hydrochloric acid, results. again dissolution of the precipitate. The alcohol and the excess pyrrolidine are then blown off with steam and, after cooling, the remaining oil is absorbed in ether. After the essential solution has dried and the solvent has been driven off, an oil remains that is purified by vacuum distillation. becomes.
He holds 43 parts by weight of pure N-pyrrolidinoacet- (2-chloro-6-methyl-a.nilid), which corresponds to a yield of 84 / o. The reaction with pvrrolidine can also take place in benzene.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH311615T | 1952-02-25 | ||
CH307799T | 1952-11-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH311615A true CH311615A (en) | 1955-11-30 |
Family
ID=25735348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH311615D CH311615A (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 |
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CH (1) | CH311615A (en) |
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US10780083B1 (en) | 2019-03-11 | 2020-09-22 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US10786485B1 (en) | 2019-03-11 | 2020-09-29 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US10842798B1 (en) | 2019-11-06 | 2020-11-24 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US10927096B2 (en) | 2019-03-11 | 2021-02-23 | Nocion Therapeutics, Inc. | Ester substituted ion channel blockers and methods for use |
US10934263B2 (en) | 2019-03-11 | 2021-03-02 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US10933055B1 (en) | 2019-11-06 | 2021-03-02 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US10968179B2 (en) | 2019-03-11 | 2021-04-06 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US11332446B2 (en) | 2020-03-11 | 2022-05-17 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
-
1952
- 1952-02-25 CH CH311615D patent/CH311615A/en unknown
Cited By (14)
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US11512058B2 (en) | 2019-03-11 | 2022-11-29 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US10786485B1 (en) | 2019-03-11 | 2020-09-29 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US10828287B2 (en) | 2019-03-11 | 2020-11-10 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US10780083B1 (en) | 2019-03-11 | 2020-09-22 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US10927096B2 (en) | 2019-03-11 | 2021-02-23 | Nocion Therapeutics, Inc. | Ester substituted ion channel blockers and methods for use |
US10934263B2 (en) | 2019-03-11 | 2021-03-02 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US11643404B2 (en) | 2019-03-11 | 2023-05-09 | Nocion Therapeutics, Inc. | Ester substituted ion channel blockers and methods for use |
US10968179B2 (en) | 2019-03-11 | 2021-04-06 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US11603355B2 (en) | 2019-03-11 | 2023-03-14 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US11377422B2 (en) | 2019-03-11 | 2022-07-05 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US10842798B1 (en) | 2019-11-06 | 2020-11-24 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US10933055B1 (en) | 2019-11-06 | 2021-03-02 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US11696912B2 (en) | 2019-11-06 | 2023-07-11 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
US11332446B2 (en) | 2020-03-11 | 2022-05-17 | Nocion Therapeutics, Inc. | Charged ion channel blockers and methods for use |
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