CH311472A - Process for the preparation of 1- (B-amino-ethylamino) -benzene-2-carboxylic acid. - Google Patents
Process for the preparation of 1- (B-amino-ethylamino) -benzene-2-carboxylic acid.Info
- Publication number
- CH311472A CH311472A CH311472DA CH311472A CH 311472 A CH311472 A CH 311472A CH 311472D A CH311472D A CH 311472DA CH 311472 A CH311472 A CH 311472A
- Authority
- CH
- Switzerland
- Prior art keywords
- benzene
- carboxylic acid
- ethylenediamine
- amino
- reaction
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
- C07C309/01—Sulfonic acids
- C07C309/28—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
- C07C309/45—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton
- C07C309/46—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton having the sulfo groups bound to carbon atoms of non-condensed six-membered aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
- C07C309/01—Sulfonic acids
- C07C309/28—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
- C07C309/45—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton
- C07C309/47—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton having at least one of the sulfo groups bound to a carbon atom of a six-membered aromatic ring being part of a condensed ring system
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung von 1- (¯-Amino-Ïthylamino)-benzol-2-carbonsÏure@
Es wurde gefunden, dass man 1-(¯-Amino athylamino)-benzol-2-carbonsäure erhalten kann, wenn man 1-Chlor-benzol-2-carbonsäure mit Äthylendiamin unter solchen Bedingun- gen umsetzt, dass nur eine Aminogruppe des ¯thylendiamins mit dem Chloratom der l-Chlor-benzol-2-carbonsäure reagiert.
Die nach diesem Verfahren erhaltene 1 (¯-Amino-Ïthylamino)-benzol-2-carbonsÏure bildet ein Chlorhydrat mit einem Schmelz- punkt von 212 bis 213 (unkorr.). Durch Umsetzung mit Natriumcarbonat entsteht das leieht lösliche Natriumsalz, das aus sehr wenig Wasser oder günstiger aus etwa 70%igem Alkohol umkristallisiert werden kann. Die Verbindung ist neu und stellt ein wertvolles Farbstoffzwischenprodukt dar.
Die Reaktion wird zweekmässig so geleitet, laR ein erheblicher Überschuss an Äthylendiamin während der Reaktion vorliegt. Die Umsetzung wird mit Vorteil bei der Siedetemperatur des Athylendiamins durchgeführt.
Beispiel : 31, 3 Teile 1-Chlor-benzol-2-carbonsäure werden in 100 Teilen Äthylendiamin unter Zugabe von 0, 5 Teilen Kupferpulver 24 Stun- den unter RüekfluR gekocht. Dann wird das nieht verbrauchte Äthylendiamin unter ver mindertem Druck abdestilliert. Der Destilla tionsrüekstand wird in 250 Teilen heisser, etwa 10"/oiger Salzsäure aufgenommen. In guter Ausbeute kristallisiert dann die 1-(¯ Amino-äthylamino)-benzol-2-carbonsäure als Monochlorhydrat aus.
PATENTANSPRUCH :
Verfahren zur Herstellung von 1- (¯ Amino-äthylamino)-benzol-2-carbonsäure, dadurch gekennzeichnet, dass man 1-Chlor-ben zol-2-carbonsäure mit Äthylendiamin unter solchen Bedingungen umsetzt, dass nur eine Aminogruppe des Äthylendiamins mit dem Chloratom der 1-Chlor-benzol-2-carbonsäure reagiert.
Die erhaltene 1- (¯-Amino-Ïthylamino)benzol-2-carbonsäure bildet ein Chlorhydrat mit einem Schmelzpunkt von 212 bis 213 (unkorr.). Durch Umsetzung mit Natriumcarbonat entsteht das leicht l¯sliche Natriumsalz, das aus sehr wenig Wasser oder günstiger aus etwa 70%igem Alkohol umkristallisiert werden kann. Die Verbindung ist neu und stellt ein wertvolles Farbstoffzwisehen- produkt dar.
UNTERANSPRÜCHE :
1. Verfahren gemäss Patentanspruch, dadurch gekennzeiehnet, da¯ man einen grossen Uberschuss an Äthylendiamin verwendet.
2. Verfahren gemäss Patentanspruch, dadurch gekennzeiehnet, dass man die Reaktion bei der Siedetemperatur des Äthylendiamins durchf hrt.
**WARNUNG** Ende DESC Feld konnte Anfang CLMS uberlappen**.
Process for the preparation of 1- (¯-amino-Ïthylamino) -benzene-2-carboxylic acid @
It has been found that 1- (¯-amino ethylamino) -benzene-2-carboxylic acid can be obtained if 1-chloro-benzene-2-carboxylic acid is reacted with ethylenediamine under such conditions that only one amino group of the ¯thylenediamine reacts with the chlorine atom of the l-chloro-benzene-2-carboxylic acid.
The 1 (¯-amino-Ïthylamino) -benzene-2-carboxylic acid obtained by this process forms a chlorohydrate with a melting point of 212 to 213 (uncorr.). Reaction with sodium carbonate produces the slightly soluble sodium salt, which can be recrystallized from very little water or, more advantageously, from about 70% alcohol. The compound is new and represents a valuable intermediate dye.
The reaction is conducted in such a way that there is a considerable excess of ethylenediamine during the reaction. The reaction is advantageously carried out at the boiling point of the ethylene diamine.
Example: 31.3 parts of 1-chloro-benzene-2-carboxylic acid are boiled under reflux for 24 hours in 100 parts of ethylenediamine with the addition of 0.5 parts of copper powder. Then the never used ethylenediamine is distilled off under reduced pressure. The distillation residue is taken up in 250 parts of hot, approximately 10% hydrochloric acid. The 1- (¯ amino-ethylamino) -benzene-2-carboxylic acid then crystallizes out as monochlorohydrate in good yield.
PATENT CLAIM:
Process for the preparation of 1- (¯ Amino-äthylamino) -benzene-2-carboxylic acid, characterized in that 1-chloro-benzene-2-carboxylic acid is reacted with ethylenediamine under such conditions that only one amino group of the ethylenediamine with the chlorine atom the 1-chloro-benzene-2-carboxylic acid reacts.
The 1- (¯-amino-ethylamino) benzene-2-carboxylic acid obtained forms a chlorohydrate with a melting point of 212 to 213 (uncorr.). Reaction with sodium carbonate produces the easily soluble sodium salt, which can be recrystallized from very little water or, more efficiently, from about 70% alcohol. The compound is new and is a valuable dye toe product.
SUBCLAIMS:
1. The method according to claim, characterized in that a large excess of ethylenediamine is used.
2. The method according to claim, characterized in that the reaction is carried out at the boiling point of the ethylenediamine.
** WARNING ** End of DESC field could overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH748715X | 1952-08-28 | ||
CH311472T | 1952-12-24 | ||
CH775885X | 1953-07-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH311472A true CH311472A (en) | 1955-11-30 |
Family
ID=27178338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH311472D CH311472A (en) | 1952-08-28 | 1952-12-24 | Process for the preparation of 1- (B-amino-ethylamino) -benzene-2-carboxylic acid. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH311472A (en) |
-
1952
- 1952-12-24 CH CH311472D patent/CH311472A/en unknown
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