CH100851A - Process for the preparation of a heterocyclic compound of the naphthalene series. - Google Patents
Process for the preparation of a heterocyclic compound of the naphthalene series.Info
- Publication number
- CH100851A CH100851A CH100851DA CH100851A CH 100851 A CH100851 A CH 100851A CH 100851D A CH100851D A CH 100851DA CH 100851 A CH100851 A CH 100851A
- Authority
- CH
- Switzerland
- Prior art keywords
- heterocyclic compound
- preparation
- naphthalene series
- oxalyl chloride
- parts
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
- C07D333/50—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom condensed with carbocyclic rings or ring systems
- C07D333/74—Naphthothiophenes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Description
Verfahren zur Herstellung einer lieterocyelischen Verbindung der Naphtalinreihe. Es wurde gefunden, dass man zu einer technisch wertvollen heterocyclischen Ver bindung der Naplhtalinreihe gelangen kann, wenn man auf a-Thionaphtol, gegebenenfalls in Gegenwart von Verdünnungs- und Konden sationsmitteln, Oxalylchlori.d einwirken lässt. Die so erhaltene neue Verbindung, das a- Naphtothiofuran-1:2-dion, bildet ein rotes, kristallinisches Pulver und schmilzt bei <B>1680.</B>
<I>Beispiele:</I> 1. 160 Teile a-Thionaphtol werden in 635 Oxalylchlorid eingetragen. Die Mischung wird einige Zeit bei gewöhnlicher Tempera tur durchgerührt, hierauf langsam bis zum Siedepunkt des Oxalylchlorids erwärmt .und dieses abdestilliert. Der Rückstand wird noch einige Stunden auf höhere Temperatur erhitzt; dann wird das entstandene a-I\Taphto- thiofuran-1:2-dion mit einer wässerigen Sodalösung extrahiert und daraus mit Salz säure abgeschieden.
2. 160 Teile a-Thionaphtol werden in eine Lösung von 190,5 Teilen Oxalylchlorid und 570 Teilen Schwefelkohlenstoff ein getragen und einige Stunden am Rückfluss- kühler gekocht. Hierauf werden der Schwe felkohlenstoff und das überschüssige Oxalyl- chlorid abdestilliert. Der Rückstand, wieder in Schwefelkohlenstoff gelöst, wird nach Zugabe von 132 Teilen Aluminiumchlorid weiter einige Stunden gekocht.
Die ganze Masse wird dann in verdünnte Salzsäure ein getragen, der Schwefelkohlenstoff mit Was serdampf abdestilliert, das rohe a-Naphto- thiofuran-1:2-dion abfiltriert und wie im Beispiel 1 angegeben gereinigt.
Process for the preparation of a lieterocyelic compound of the naphthalene series. It has been found that a technically valuable heterocyclic Ver bond of the naplhtalin series can be achieved if Oxalylchlori.d is allowed to act on α-thionaphtol, optionally in the presence of diluents and condensation agents. The new compound obtained in this way, the a-naphtothiofuran-1: 2-dione, forms a red, crystalline powder and melts at <B> 1680. </B>
<I> Examples: </I> 1. 160 parts of a-thionaphtol are introduced into 635 oxalyl chloride. The mixture is stirred for some time at normal temperature, then slowly warmed to the boiling point of the oxalyl chloride and this is distilled off. The residue is heated to a higher temperature for a few hours; then the resulting α-I \ taphthiofuran-1: 2-dione is extracted with an aqueous soda solution and separated from it with hydrochloric acid.
2. 160 parts of a-thionaphtol are introduced into a solution of 190.5 parts of oxalyl chloride and 570 parts of carbon disulfide and refluxed for a few hours. The carbon sulphide and the excess oxalyl chloride are then distilled off. The residue, redissolved in carbon disulfide, is boiled for a few more hours after 132 parts of aluminum chloride have been added.
The whole mass is then introduced into dilute hydrochloric acid, the carbon disulfide is distilled off with water vapor, the crude α-naphthiofuran-1: 2-dione is filtered off and purified as indicated in Example 1.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH92688T | 1920-12-11 | ||
CH100851T | 1922-12-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH100851A true CH100851A (en) | 1924-01-02 |
Family
ID=25704549
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH100851D CH100851A (en) | 1920-12-11 | 1922-12-02 | Process for the preparation of a heterocyclic compound of the naphthalene series. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH100851A (en) |
-
1922
- 1922-12-02 CH CH100851D patent/CH100851A/en unknown
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