CH194452A - Process for the preparation of a compound of the phenanthrene series. - Google Patents
Process for the preparation of a compound of the phenanthrene series.Info
- Publication number
- CH194452A CH194452A CH194452DA CH194452A CH 194452 A CH194452 A CH 194452A CH 194452D A CH194452D A CH 194452DA CH 194452 A CH194452 A CH 194452A
- Authority
- CH
- Switzerland
- Prior art keywords
- compound
- phenanthrene
- preparation
- hydrogen halide
- series
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung einer Verbindung der Phenanthrenreihe. Es wurde gefunden, dass man Phenan- thren und seine Derivate herstellen kann, wenn man Iso-stilbenverbindungen der allge meinen Formel:
EMI0001.0008
(worin ein oder mehrere X Substituenten be deuten, die miteinander auch weitere carbo- cyclische oder heterocyclische Ringe bilden können, und die übrigen;
X Wasserstoff be deuten) bezw. die entsprechenden Benzylver- bindungen mit halogenwas:serstoffabspalten- den Mitteln behandelt. Hierbei erfolgt unter Abspaltung von Halogenwasserstoff Ring schluss zum Phenanthrenclerivat; bei Verwen dung der entsprechenden Benzylv.embindung tritt neben der Abspaltung von Halogenwas serstoff gleichzeitig Dehydrierung ein.
Als halogenwasserstoffabspaltende Mittel kann man insbesondere stark alkalisch. wir kende Mittel, zweckmässig unter Zusatz von hochsiedenden tertiären Basen,, verwenden.
Die so erhaltenen Phenanthrenderivate sind zum Teil neue, zum Teil auf anderem Wege schwer zugängliche Venbindungen. Sie sollen als Zwischenprodukte zur Herstellung von Farbstoffen und pharmazeutischen Pro dukten Verwendung finden.
Vorliegendes Patent bezieht sich nun auf ein Verfahren zur Herstellung einer Verbin dung der Phenanthrenreihe, welches dadurch gekennzeichnet ist, dass man a-Phenyl-o- chlor-hydrozimmtsäu,re mit halogenwasser- stoffabspaltenden Mitteln behandelt, zweck mässig unter Zwatz eaner hochsiedenden ter- tiären Base.
Die so erhaltene Phenranthren-9-carbon- säure schmilzt nach einmaligem Umkristalli- sieren aus Eisessig bei 25.3 bis 254' C und zeigt die in der Literatur beschriebenen Ei- genschaften. Sie soll als Zwischenprodukt für .die Herstellung von Farbstoffen, und pharmazeutischen Produkten Verwendung finden.
<I>Beispiel:</I> Eine Mischung von 90 Teilen a-Phenyl- o-chlor-hydrozimmtsäure, 450 Teilen Ätzkali und 900 Teilen Chinolin wird ungefähr zwei Stunden unter Rühren und Rückflusskühlung zum Sieden erhitzt.
Dann wird die Schmelze auf ein Gemisch von Eis und Salzsäure ge gossen, der entstandene Niederschlag abge saugt und durch Umlösen aus wässeriger Sodalösung von geringen Mengen a1kali-un- löslicher Produkte befreit. Man erhält so die Phenanthren-9-carbonsäure in einer für die meisten Zwecke genügenden Reinheit.
Process for the preparation of a compound of the phenanthrene series. It has been found that phenanthene and its derivatives can be produced by using iso-stilbene compounds of the general formula:
EMI0001.0008
(in which one or more X are substituents which can also form further carbocyclic or heterocyclic rings with one another, and the others;
X denote hydrogen) respectively. the corresponding benzyl compounds are treated with agents that split off hydrogen halide. This takes place with elimination of hydrogen halide ring closure to the phenanthrene derivative; When using the corresponding benzyl compound, dehydrogenation occurs at the same time as the elimination of hydrogen halide.
As an agent which splits off hydrogen halide, one can in particular be strongly alkaline. we kende means, expediently with the addition of high-boiling tertiary bases ,, use.
Some of the phenanthrene derivatives obtained in this way are new, some of which are difficult to access by other means. They should be used as intermediates for the production of dyes and pharmaceutical pro ducts.
The present patent now relates to a process for the production of a compound of the phenanthrene series, which is characterized in that a-phenyl-o-chlorohydrozinntsäu, re treated with hydrogen halide-releasing agents, expediently with Zwatz ean high-boiling tertiary Base.
The phenranthrene-9-carboxylic acid obtained in this way melts after recrystallization once from glacial acetic acid at 25.3 to 254 ° C. and shows the properties described in the literature. It should be used as an intermediate for the manufacture of dyes and pharmaceutical products.
<I> Example: </I> A mixture of 90 parts of a-phenyl-o-chlorohydrocyclic acid, 450 parts of caustic potash and 900 parts of quinoline is heated to the boil for about two hours while stirring and refluxing.
The melt is then poured onto a mixture of ice and hydrochloric acid, the precipitate formed is filtered off with suction and freed from small amounts of alkali-insoluble products by dissolving in aqueous soda solution. The phenanthrene-9-carboxylic acid is thus obtained in a purity sufficient for most purposes.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE194452X | 1935-08-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH194452A true CH194452A (en) | 1937-12-15 |
Family
ID=5744412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH194452D CH194452A (en) | 1935-08-10 | 1936-08-07 | Process for the preparation of a compound of the phenanthrene series. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH194452A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2436270A (en) * | 1944-05-22 | 1948-02-17 | Schering Corp | Polyiodo diaryl aliphatic acids and process for their manufacture |
-
1936
- 1936-08-07 CH CH194452D patent/CH194452A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2436270A (en) * | 1944-05-22 | 1948-02-17 | Schering Corp | Polyiodo diaryl aliphatic acids and process for their manufacture |
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