CH247921A - Process for the preparation of the new α, α'-dichlorosebacic acid chloride. - Google Patents
Process for the preparation of the new α, α'-dichlorosebacic acid chloride.Info
- Publication number
- CH247921A CH247921A CH247921DA CH247921A CH 247921 A CH247921 A CH 247921A CH 247921D A CH247921D A CH 247921DA CH 247921 A CH247921 A CH 247921A
- Authority
- CH
- Switzerland
- Prior art keywords
- acid chloride
- dichlorosebacic
- new
- preparation
- mol
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
- C07C51/363—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by introduction of halogen; by substitution of halogen atoms by other halogen atoms
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Saccharide Compounds (AREA)
Description
Verfahren zur Herstellung des neuen a,a'-Dichlorsebacinsäurechlorids. Es wurde gefunden, dass man zum neuen a,a'-Dichlorsebacinsäurechlorid gelangt, wenn man 1 Mol Sebacinsäurechlorid mit 2 Mol Phosphorpentachlorid erhitzt.
Die Umsetzung wird zweckmässig bei einer 100 übersteigenden Temperatur, z. B. bei. 1.30-160 , vorgenommen, gegebenenfalls in Gegenwart eines inerten Lösungsmittels oder ferner von Phosphoroxychlorid.
Das so erhaltene neue a,ä -Dichlorsebacin- säurechlorid, eine ölige Flüssigkeit, liefert beim Behandeln mit Äthylalkohol den a,ä - Dichlorsebacinsäurediäthylester vom gp. 166 bis 169 (2 mm). Das neue Erzeugnis kann als Zwischenprodukt, z. B. zur Herstellung von Textilhilfsstoffen, verwendet werden. <I>Beispiel:</I> 12 Teile Seba.cinsäurechlorid und 21 Teile Phosphorpentachlorid werden während 4 Stunden am Rückflusskühler auf 140--150 erhitzt.
Nach Abdestillieren des gebildeten Phosphortrichlorids kann das rohe a,a'-Di- chlorsebaeinsäurechlorid, eine ölige Flüssig keit, in der Weise in den a,a'-Dichlorsebacin- säurediäthylester übergeführt werden, dass das wie oben beschrieben erhaltene rohe Säurechlorid nach dem Abdestillieren des Phosphortrichlorids mit kaltem absolutem Alkohol vermischt und die Mischung wäh rend 2 Stunden am Rückflusskühler gekocht wird.
Aus dem mit Natriumbicarbonat neu tralisierten Veresterungsgemisch wird der Alkohol im Vakuum abdestilliert, der Rück stand mit Äther und Wasser aufgenommen, die Ätherschicht mit bicarbonathaltigem Wasser gewaschen, abgetrennt und der Äther verjagt. Das als Rückstand hinterbleibende 01 ergibt im Hochvakuum fraktioniert mit guter Ausbeute _ den a,ä -Dichlorsebacinsäure- diäthylester, der bei 2 mm einen Siedepunkt von 166-l69 besitzt.
Process for the preparation of the new α, α'-dichlorosebacic acid chloride. It has been found that the new α, α'-dichlorosebacic acid chloride is obtained if 1 mol of sebacic acid chloride is heated with 2 mol of phosphorus pentachloride.
The reaction is conveniently carried out at a temperature exceeding 100, e.g. B. at. 1.30-160, made, if appropriate in the presence of an inert solvent or phosphorus oxychloride.
The new α, α-dichlorosebacic acid chloride obtained in this way, an oily liquid, upon treatment with ethyl alcohol gives the α, α-dichlorosebacic acid diethyl ester of gp. 166 to 169 (2 mm). The new product can be used as an intermediate, e.g. B. for the production of textile auxiliaries used. <I> Example: </I> 12 parts of sebacic acid chloride and 21 parts of phosphorus pentachloride are heated to 140-150 for 4 hours on a reflux condenser.
After distilling off the phosphorus trichloride formed, the crude a, a'-dichlorosebaic acid chloride, an oily liquid, can be converted into the a, a'-dichlorosebacic acid diethyl ester in such a way that the crude acid chloride obtained as described above after distilling off the Phosphorus trichloride is mixed with cold absolute alcohol and the mixture is refluxed during 2 hours.
From the esterification mixture neutralized with sodium bicarbonate, the alcohol is distilled off in vacuo, the residue is taken up with ether and water, the ether layer is washed with water containing bicarbonate, separated and the ether is chased away. The oil remaining as residue gives, fractionated in a high vacuum, with good yield, the α, α -dichlorosebacic acid diethyl ester, which has a boiling point of 166-169 at 2 mm.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH242837T | 1944-12-21 | ||
CH247921T | 1944-12-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH247921A true CH247921A (en) | 1947-03-31 |
Family
ID=25728735
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH247921D CH247921A (en) | 1944-12-21 | 1944-12-21 | Process for the preparation of the new α, α'-dichlorosebacic acid chloride. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH247921A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2865953A (en) * | 1954-06-09 | 1958-12-23 | Nat Distillers Chem Corp | Process for production of polyhalogenated aliphatic diacids and products obtained thereby |
-
1944
- 1944-12-21 CH CH247921D patent/CH247921A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2865953A (en) * | 1954-06-09 | 1958-12-23 | Nat Distillers Chem Corp | Process for production of polyhalogenated aliphatic diacids and products obtained thereby |
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