CH104927A - Process for the production of a thionaphthisatin. - Google Patents
Process for the production of a thionaphthisatin.Info
- Publication number
- CH104927A CH104927A CH104927DA CH104927A CH 104927 A CH104927 A CH 104927A CH 104927D A CH104927D A CH 104927DA CH 104927 A CH104927 A CH 104927A
- Authority
- CH
- Switzerland
- Prior art keywords
- thionaphthisatin
- bromo
- production
- condensation
- chloride
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines Thionaphthisatins. Es wurde gefunden, dass man ein neues Thionaphthisatin, das 5-Brom-2. 1-thionaphth- isatin erhält, wenn man auf 5-Brom-2-thio- naphthol Oxalylchlorid, gegebenenfalls unter Zusatz eines Kondensationsmittels, einwirken lässt.
Das 5-Brom-2 .1-thionaphthisatin bildet ein rotes Pulver, nach einmaligem Umlösen aus Benzol erhält man Kristalle vom Sp. 212 bis 213 .
<I>Beispiel:</I> 239 Teile 5-Brom-2-thionaphthol (farblose Nadeln vom Sp. 50-51 ) werden unter Rüh ren bei 0 bis 10 in etwa 600 Teile Oxalyl- chlorid eingetragen und 20 Stunden bei ge wöhnlicher Temperatur gerührt. Hierauf wird das überschüssige Oxalylchlorid abdestilliert und der Rückstand, nach Zugabe von 1_000 Teilen Schwefelkohlenstoff, unter Rühren in- nert einer Stunde mit 250 Teilen Aluminium chlorid versetzt, wobei die Temperatur bei 0 bis 10 gehalten wird.
Man rührt nun noch längere Zeit bei gewöhnlicher Temperatur, erwärmt dann langsam bis zum Sieden des Schwefelkohlenstoffes und belässt 1 Stunde bei dieser Temperatur. Man trägt dann das Reaktionsprodukt in salzsäurehaltiges Wasser aus. Nach dem Abtreiben des Schwefelkohlen- stoffes wird filtriert und der Rückstand mit verdünnter Sodalösung bei 50-60 ausge zogen; aus der Sodalösung wird das 5-Brotn- 2 . 1-thionaphthisatin durch Salzsäure gefällt.
Process for the production of a thionaphthisatin. It has been found that a new thionaphthisatin, 5-bromo-2. 1-thionaphthisatin is obtained when oxalyl chloride is allowed to act on 5-bromo-2-thionaphthol, optionally with the addition of a condensing agent.
The 5-bromo-2 .1-thionaphthisatin forms a red powder, after dissolving once from benzene crystals from col. 212 to 213 are obtained.
<I> Example: </I> 239 parts of 5-bromo-2-thionaphthol (colorless needles from Sp. 50-51) are added to about 600 parts of oxalyl chloride with stirring at 0 to 10 and for 20 hours at normal Temperature stirred. The excess oxalyl chloride is then distilled off and, after the addition of 1,000 parts of carbon disulfide, 250 parts of aluminum chloride are added with stirring within one hour, the temperature being kept at 0-10.
The mixture is then stirred for a longer time at the usual temperature, then heated slowly until the carbon disulfide boils and left at this temperature for 1 hour. The reaction product is then discharged into water containing hydrochloric acid. After the carbon disulfide has been driven off, it is filtered and the residue is extracted with dilute soda solution at 50-60; the soda solution becomes the 5-bread 2. 1-thionaphthisatin precipitated by hydrochloric acid.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH104927T | 1922-12-02 | ||
CH102033T | 1922-12-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH104927A true CH104927A (en) | 1924-05-16 |
Family
ID=25706111
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH104927D CH104927A (en) | 1922-12-02 | 1922-12-02 | Process for the production of a thionaphthisatin. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH104927A (en) |
-
1922
- 1922-12-02 CH CH104927D patent/CH104927A/en unknown
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