CH150164A - Process for the preparation of an arylacetic acid. - Google Patents
Process for the preparation of an arylacetic acid.Info
- Publication number
- CH150164A CH150164A CH150164DA CH150164A CH 150164 A CH150164 A CH 150164A CH 150164D A CH150164D A CH 150164DA CH 150164 A CH150164 A CH 150164A
- Authority
- CH
- Switzerland
- Prior art keywords
- acid
- preparation
- fluorene
- arylacetic acid
- melts
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfuhren zur Darstellung einer Arylessigsäure. Gegenstand dieses Zusatzpatentes ist ein Verfahren zur Darstellung von Fluore- nylessigsäure, welches darin besteht, dass man Fluoren und Monochloressigsäure aufeinan der einwirken lässt; vorzugsweise nimmt man die Reaktion bei erhöhter Temperatur vor.
<I>Beispiel:</I> 200 Gewichtsteile Fluoren und 300 Ge wichtsteile Monochloressigsäure werden etwa 60 Stunden auf 175 bis 180 erwärmt. Nach dem Abkühlen entfernt man die überflüssige TVIonochloressigs,äure durch Behandeln. mit Wasser und trennt die Fluo.renylessigsäure vom nicht umgesetzten Fluoren durch Aus ziehen mit .etwa, 3 wo iger Natronlauge und Ausfällen mit verdünnter Salzsäure.
Man kann auch das gesamte Reaktions gemisch im Vakuum destillieren, wobei zu erst Chloressigsäure, dann das Fluoren und schliesslich bei 8 mm von 160 bis 180 die Fluorenylessigsäure übergeht. Diese kristal- lisiert aus Methylalkohol in farblosen Pris men und schmilzt nach vorherigem Sintern bei 148' C. Die Verbindung soll als Zwi schenprodukt für die Farbstoffherstellung Verwendung finden.
Procedure for the preparation of an arylacetic acid. The subject of this additional patent is a process for the preparation of fluorene nyl acetic acid, which consists in allowing fluorene and monochloroacetic acid to act on one another; the reaction is preferably carried out at an elevated temperature.
<I> Example: </I> 200 parts by weight of fluorene and 300 parts by weight of monochloroacetic acid are heated to 175 to 180 for about 60 hours. After cooling, the excess TVIonochloressigsÄure is removed by treatment. with water and separates the fluoro.renylacetic acid from the unconverted fluorene by pulling out with about 3% sodium hydroxide solution and precipitation with dilute hydrochloric acid.
You can also distill the entire reaction mixture in vacuo, first chloroacetic acid, then the fluorene and finally at 8 mm from 160 to 180, the fluorenylacetic acid passes over. This crystallizes from methyl alcohol in colorless prisms and, after previous sintering, melts at 148 ° C. The compound is intended to be used as an intermediate product in the manufacture of dyes.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE150164X | 1929-02-01 | ||
| CH146854T | 1930-01-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH150164A true CH150164A (en) | 1931-10-15 |
Family
ID=25714936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH150164D CH150164A (en) | 1929-02-01 | 1930-01-23 | Process for the preparation of an arylacetic acid. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH150164A (en) |
-
1930
- 1930-01-23 CH CH150164D patent/CH150164A/en unknown
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