CH129174A - Process for the preparation of Bz1-oxy-Bz2-benzanthroncarboxylic acid ethyl ester. - Google Patents
Process for the preparation of Bz1-oxy-Bz2-benzanthroncarboxylic acid ethyl ester.Info
- Publication number
- CH129174A CH129174A CH129174DA CH129174A CH 129174 A CH129174 A CH 129174A CH 129174D A CH129174D A CH 129174DA CH 129174 A CH129174 A CH 129174A
- Authority
- CH
- Switzerland
- Prior art keywords
- sep
- oxy
- preparation
- ethyl ester
- acid ethyl
- Prior art date
Links
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- Physical Or Chemical Processes And Apparatus (AREA)
Description
Verfahren zur Darstellung von Bzl-Ogy-Bz2-benzanthronearbonsäureäthylester. Gegenstand der vorliegenden Erfindung ist ein Verfahren zur Darstellung von Bzl- Oy-Bz2 -benzanthroncarbonsäureäthylester, dadurch gekennzeichnet, dass man Anthron und Äthoxymethylenmalonsäure..diäthylester von der folgenden Formel:
EMI0001.0007
mit oder ohne Zusatz eines sauren Konden sationsmittels kondensiert.
<I>Beispiele:</I> 1. Zu einer Lösung von 19,.1 Gewichts teilen Anthron in 100 Gewichtsteilen Schwe felsäure von 66 De und 10 Gewichtsteilen Wasser lässt man langsam bei etwa 60 eine Auflösung von 23 Gewichtsteilen Ätlioxy- methylenmalonsäurediä.thylester in 35 Ge- wichtsteilen Eisessig laufen, erhitzt kurze Zeit auf etwa 100 , gibt auf Wasser, saugt den ausgeschiedenen rohen Bzl-Oxy-Bz2-benz- anthroncarbonsäureäthylester ab und wäscht neutral. Zur Reinigung kann er aus orga nischen Lösungsmitteln umkristallisiert wer den.
Aus Eisessig kristallisiert er in schönen gelben Nadeln vom Schmelzpunkt 206 . In konzentrierter Schwefelsäure löst er sich mit karminroter Farbe und intensiv braun roter Fluoreszenz.
2. Äquivalente 1Vlengen Anthron und Äthoxymethylenmalonsäurediäthylester wer den in wenig Chinolin eine Viertelstunde unter Rückfluss zum Sieden erhitzt. Nach dem Erkalten wird mit etwas Sprit verdünnt und der ausgeschiedene Körper in Sprit ge waschen. Durch Umkristallisation aus Eis essig erhält man gelbe Nadeln vom Schmelz punkt 206 . Ihre Lösungsfarbe in konzen trierter Schwefelsäure und in alkoholischem Alkali ist karminrot mit intensiv braunroter Fluoreszenz.
Der Körper ist nach Entstehung und Eigenschaften vermutlich Bzl-Oxy-Bz2- l.)eriz anthroncarbons@iureä.thyles 'er.
Process for the preparation of Bzl-Ogy-Bz2-benzanthronearboxylic acid ethyl ester. The present invention relates to a process for the preparation of Bzl- Oy-Bz2 -benzanthroncarbonsäureäthylester, characterized in that one anthrone and ethoxymethylene malonic acid..diäthylester of the following formula:
EMI0001.0007
condensed with or without the addition of an acidic condensation agent.
<I> Examples: </I> 1. To a solution of 19.1 parts by weight of anthrone in 100 parts by weight of sulfuric acid of 66 De and 10 parts by weight of water, 23 parts by weight of ethyl oxymethylene malonic acid are slowly dissolved at about 60 ° Run in 35 parts by weight of glacial acetic acid, heat briefly to about 100, add to water, suck off the precipitated crude Bzl-Oxy-Bz2-benzanthronecarboxylic acid ethyl ester and wash neutral. For cleaning, it can be recrystallized from organic solvents.
From glacial acetic acid, it crystallizes in beautiful yellow needles with a melting point of 206. It dissolves in concentrated sulfuric acid with a carmine-red color and intensely brown-red fluorescence.
2. Equivalents of 1Vlengen anthrone and ethoxymethylene malonic acid diethyl ester who heated to boiling under reflux for a quarter of an hour in a little quinoline. After cooling, it is diluted with a little bit of fuel and the excreted body is washed in spray. Yellow needles with a melting point of 206 are obtained by recrystallization from glacial acetic acid. Their solution color in concentrated sulfuric acid and in alcoholic alkali is carmine red with intense brownish-red fluorescence.
According to its origin and properties, the body is probably Bzl-Oxy-Bz2- l.) Eriz anthroncarbons@iureä.thyles' er.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE129174X | 1926-04-03 | ||
| CH127266T | 1927-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH129174A true CH129174A (en) | 1928-12-01 |
Family
ID=25710848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH129174D CH129174A (en) | 1926-04-03 | 1927-04-02 | Process for the preparation of Bz1-oxy-Bz2-benzanthroncarboxylic acid ethyl ester. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH129174A (en) |
-
1927
- 1927-04-02 CH CH129174D patent/CH129174A/en unknown
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