CH187898A - Process for the production of a condensation product. - Google Patents
Process for the production of a condensation product.Info
- Publication number
- CH187898A CH187898A CH187898DA CH187898A CH 187898 A CH187898 A CH 187898A CH 187898D A CH187898D A CH 187898DA CH 187898 A CH187898 A CH 187898A
- Authority
- CH
- Switzerland
- Prior art keywords
- production
- condensation product
- new condensation
- aminodiphenyl
- acetylamino
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C233/00—Carboxylic acid amides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines Kondensationsproduktes. Es wurde gefunden, dass man ein neues Kondensationsprodukt erhält, wenn man 4- Acetylamino - 3 # 3'-dimethyl - 4'- aminodiphe- nyl mit Acetessigester kondensiert. Das neue Kondensationsprodukt bildet ein weisses Pul ver, ist in Ätzalkalien löslich und ist ein wertvolles Zwischenprodukt zur Herstellung von Farbstoffen.
<I>Beispiel:</I> 25,4 Teile von in bekannter Weise her gestelltem 4-Acetylamino-3 # 3'-dimethyl-4'- aminodiphenyl werden in einem geschlossenen Apparat mit absteigendem Kühler in 200 Teilen Chlorbenzol unter Rühren zum Sieden erhitzt.
In das schwach kochende Gemenge tropft man innert etwa 1/s Stunde 16 Teile Acet- essigester. Man lässt noch etwa 1/s Stunde derart kochen, dass etwa 80-100 Teile Chlorbenzol abdestillieren. Man lässt erkalten, nutscht ab, treibt das anhaftende Chlorbenzol durch Wasserdampf-Destillation ab und löst den Rückstand in kalter wässeriger alko holischer Natriumhydroxydlösung. Aus dem Filtrat erhält man durch Fällung und Trock nen ein weisses Pulver.
Process for the production of a condensation product. It has been found that a new condensation product is obtained when 4-acetylamino - 3 # 3'-dimethyl - 4'-aminodiphenyl is condensed with acetoacetic ester. The new condensation product forms a white powder, is soluble in caustic alkalis and is a valuable intermediate product for the production of dyes.
<I> Example: </I> 25.4 parts of 4-acetylamino-3 # 3'-dimethyl-4'-aminodiphenyl produced in a known manner are boiled in 200 parts of chlorobenzene with stirring in a closed apparatus with a descending condenser heated.
16 parts of acetoacetic ester are added dropwise to the slightly boiling mixture within about 1 / s hour. The mixture is left to boil for about 1 / s hour so that about 80-100 parts of chlorobenzene are distilled off. It is allowed to cool, suction filtered, the adhering chlorobenzene is driven off by steam distillation and the residue is dissolved in cold aqueous alcoholic sodium hydroxide solution. A white powder is obtained from the filtrate by precipitation and drying.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH179086T | 1934-07-21 | ||
CH187898T | 1934-07-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH187898A true CH187898A (en) | 1936-11-30 |
Family
ID=25720256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH187898D CH187898A (en) | 1934-07-21 | 1934-07-21 | Process for the production of a condensation product. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH187898A (en) |
-
1934
- 1934-07-21 CH CH187898D patent/CH187898A/en unknown
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