CH104921A - Process for the production of a thionaphthisatin. - Google Patents
Process for the production of a thionaphthisatin.Info
- Publication number
- CH104921A CH104921A CH104921DA CH104921A CH 104921 A CH104921 A CH 104921A CH 104921D A CH104921D A CH 104921DA CH 104921 A CH104921 A CH 104921A
- Authority
- CH
- Switzerland
- Prior art keywords
- thionaphthisatin
- chloro
- production
- condensation
- thionaphthol
- Prior art date
Links
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Carbon And Carbon Compounds (AREA)
Description
Verfahren zur Herstellung eines Thionaphthisatins. Es wurde gefunden, dass man ein neues Thionaphthisatin, das 4-Chlor-1 .2-thionaphth- isatin, erhält, wenn man auf 4-Chlor-l-thio- naphthol, gegebenenfalls unter Zusatz eines Kondensationsmittels, Oxalylchlo@rid einwir ken lässt.
Das 4-Chlor-1 .2-thionaphthisatin bildet ein rotes Pulver, nach einmaligem Umlösen aus Benzol erhält man Kristalle vom Schmelz punkt 220'.
<I>Beispiel:</I> 194,5 Teile 4-Chlor-l-thionaphthol (farb lose Nadeln vom Schmelzpunkt 49 bis<B>50')</B> werden unter Rühren bei 0 bis 10 in etwa 600 Teile Oxalylchlorid eingetragen und 20 Stunden bei gewöhnlicher Temperatur ge rührt. Hierauf wird das überschüssige Oxalyl- chlorid abdestilliert und der Rückstand, nach Zugabe von 1000 Teilen Schwefelkohlen stoff, unter Rühren innert einer Stunde mit 250 Teilen Aluminiumchlorid versetzt, wobei die Temperatur bei 0 bis<B>10'</B> gehalten wird.
Man rührt nun noch längere Zeit bei ge wöhnlicher Temperatur, erwärmt dann lang sam bis zum Sieden des Schwefelkohlenstof- fes und belässt eine Stunde bei dieser Tem peratur. Man trägt dann das Reaktionspro dukt in salzsäurehaltiges Wasser aus. Nach dem Abtreiben des Schwefelkohlenstoffes wird filtriert und der Rückstand mit ver dünnter Sod:alösung bei 50 bis 60 ausge zogen; aus der Sololösung wird das 4-Chlor- 1 . 2-thion.aphthisatin durch Salzsäure gefällt.
Process for the production of a thionaphthisatin. It has been found that a new thionaphthisatin, 4-chloro-1 .2-thionaphthisatin, is obtained if oxalylchloride is allowed to act on 4-chloro-1-thionaphthol, optionally with the addition of a condensing agent .
The 4-chloro-1 .2-thionaphthisatin forms a red powder, after dissolving once from benzene, crystals with a melting point of 220 'are obtained.
<I> Example: </I> 194.5 parts of 4-chloro-1-thionaphthol (colorless needles with a melting point of 49 to 50 ') are converted into about 600 parts of oxalyl chloride at 0 to 10 while stirring entered and stirred ge for 20 hours at ordinary temperature. The excess oxalyl chloride is then distilled off and, after the addition of 1000 parts of carbon disulfide, 250 parts of aluminum chloride are added with stirring over the course of one hour, the temperature being kept at 0 to 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 one hour. The reaction product is then carried out in hydrochloric acid-containing water. After the carbon disulfide has been driven off, it is filtered and the residue is extracted with dilute soda solution at 50 to 60; the 4-chloro-1 becomes from the solo solution. 2-thion.aphthisatin precipitated by hydrochloric acid.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH104921T | 1922-12-02 | ||
CH102033T | 1922-12-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH104921A true CH104921A (en) | 1924-05-16 |
Family
ID=25706105
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH104921D CH104921A (en) | 1922-12-02 | 1922-12-02 | Process for the production of a thionaphthisatin. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH104921A (en) |
-
1922
- 1922-12-02 CH CH104921D patent/CH104921A/en unknown
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