CH146432A - Process for the preparation of 4-amino-3.3'-dichloro-diphenyl-cyclohexane-4'-oxamic acid. - Google Patents
Process for the preparation of 4-amino-3.3'-dichloro-diphenyl-cyclohexane-4'-oxamic acid.Info
- Publication number
- CH146432A CH146432A CH146432DA CH146432A CH 146432 A CH146432 A CH 146432A CH 146432D A CH146432D A CH 146432DA CH 146432 A CH146432 A CH 146432A
- Authority
- CH
- Switzerland
- Prior art keywords
- diphenyl
- cyclohexane
- dichloro
- acid
- preparation
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung von 4-Amiuo-3 . 3'-diclilor-diphenyl-cyclohexan- 4'-oBaminsäure. Vorliegendes Patent bezieht sich auf ein Verfahren zur Herstellung von 4-Amino-3 .3'- dichlor- diphenyl - cyclohexan - 4'- oxaminsäure, dadurch gekennzeichnet, dass man auf 4.4'- Diainino - 3 .
3'- dichlor - diphenyl - cyclohexan Oxalsäure einwirken lässt.
Die erhaltene Moi)ooxaminsäure ist ein fast weisses Pulver; sie liefert ein leicht lös liches Ammoniumsalz, dagegen schwer lös liche Natrium- und Naliumsalze. Die Ver bindung zersetzt sich beim Erhitzen unter Braunfärbung. <I>Beispiel:</I> 20,3 kg 4.4'-Diamino-3.3'-dichlor-di- phenyl-1. I'-cyclohexan, erhalten durch Kon densation von Cyclohexanon mit 2 Mol. o-Chloranilin, werden mit 400 Liter Wasser und 17 kg kristallisierter Oxalsäure am Rückflusskühler gekocht.
Aus der anfänglich klaren Lösung scheidet sich die gebildete Oxaminsäure allmählich als schweres Pulver ab. Wenn die 1Ienge nicht mehr zuiiiniint und die angewandte Base grösstenteils um gesetzt ist, wird der Niederschlag heiss ab filtriert und mit Wasser gewaschen. Zur Reinigung löst man ihn bei 60-70 in ver dünntem Ammoniak, filtriert, wein nötig, von geringen Mengen Vermireinigungen ab und fällt aus dem Filtrat die freie Oxamin- säure mit Säure aus.
Aus dem Filtrat kann man das nicht umgesetzte Ausgangsmaterial durch Zugabe von Ammoniak abscheiden oder man kann das Filtrat unmittelbar zri einer neuen Um setzung verwenden.
Process for the preparation of 4-Amiuo-3. 3'-diclilor-diphenyl-cyclohexane-4'-o-amic acid. The present patent relates to a process for the preparation of 4-amino-3 .3'-dichlorodiphenyl-cyclohexane-4'-oxamic acid, characterized in that one refers to 4.4'-diainino-3.
3'-dichloro - diphenyl - cyclohexane oxalic acid can act.
The moi) ooxamic acid obtained is an almost white powder; it provides a readily soluble ammonium salt, while it provides poorly soluble sodium and sodium salts. The connection decomposes when heated to turn brown. <I> Example: </I> 20.3 kg 4.4'-diamino-3.3'-dichloro-diphenyl-1. I'-cyclohexane, obtained by condensation of cyclohexanone with 2 mol. O-chloroaniline, are boiled with 400 liters of water and 17 kg of crystallized oxalic acid on a reflux condenser.
The oxamic acid formed gradually separates out of the initially clear solution as a heavy powder. When the amount is no longer too large and most of the base used has been converted, the precipitate is filtered off while hot and washed with water. To clean it, it is dissolved in dilute ammonia at 60-70, filtered, wine necessary, from small amounts of contaminants and the free oxamic acid is precipitated from the filtrate with acid.
The unreacted starting material can be separated from the filtrate by adding ammonia, or the filtrate can be used immediately for a new reaction.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE146432X | 1928-08-28 | ||
| CH144853T | 1929-08-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH146432A true CH146432A (en) | 1931-04-15 |
Family
ID=25714541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH146432D CH146432A (en) | 1928-08-28 | 1929-08-22 | Process for the preparation of 4-amino-3.3'-dichloro-diphenyl-cyclohexane-4'-oxamic acid. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH146432A (en) |
-
1929
- 1929-08-22 CH CH146432D patent/CH146432A/en unknown
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