CH153693A - Process for the preparation of 3-chloro-4-methyl-6-methoxy-1-aminobenzene-2-sulfonic acid. - Google Patents
Process for the preparation of 3-chloro-4-methyl-6-methoxy-1-aminobenzene-2-sulfonic acid.Info
- Publication number
- CH153693A CH153693A CH153693DA CH153693A CH 153693 A CH153693 A CH 153693A CH 153693D A CH153693D A CH 153693DA CH 153693 A CH153693 A CH 153693A
- Authority
- CH
- Switzerland
- Prior art keywords
- chloro
- methoxy
- methyl
- aminobenzene
- preparation
- Prior art date
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung von 3-Chlor-4-methyl-6-methoxy-l-amino-benzol-2-sulfosäure. Gegenstand dieses Zusatzpatentes ist ein Verfahren zur Darstellung von 3-Chlor-4- methyl-6-methoxy-l-amino-benzol-2-sulfosäure, welches dadurch gekennzeichnet ist, dass man 3-Chlor-4 -methyl- 6 -methogy-l- amino-benzol mit molekularen Mengen Halogensulfonsäure, in Gegenwart eines Verdünnungsmittels und unter Ausschluss von jeglicher Feuchtigkeit, behandelt. Die so erhaltene neue Sulfosäure soll Verwendung finden zur Darstellung von Farbstoffen.
<I>Beispiel:</I> 171,5 Gewichtsteile 3 -Chlor- 4 -methyl-6- methoxy-l-amino-benzol werden in zirka 700 Gewichtsteilen Tetrachlorkohlenstoff gelöst. Unter kräftigem Rühren und guter Kühlung tropfen dazu 116,5 Gewichtsteile Ohlorsulfon- säure. Man rührt einige Zeit nach, ersetzt den abdestillierten Tetrachlorkohlenatoff durch technisches Chlortoluol und erhitzt langsam auf 160-170<B>0</B> C. Apparatur und sonstige Arbeitsbedingungen sind dieselben wie im Beispiel des Hauptpatentes angegeben.
Die 3-Chlor-4-tnethyl-6-methoxy-l-amino- benzol-2-sulEosäure ist nach dem Absaugen und Trocknen ein farbloses Pulver, das als Natronsalz aus Wasser umkristallisiert werden kann und eine in Wasser schwerlösliche Diazoverbindung ergibt.
Process for the preparation of 3-chloro-4-methyl-6-methoxy-1-aminobenzene-2-sulfonic acid. The subject of this additional patent is a process for the preparation of 3-chloro-4-methyl-6-methoxy-l-amino-benzene-2-sulfonic acid, which is characterized in that 3-chloro-4-methyl-6-methoxy l-amino-benzene treated with molecular amounts of halosulfonic acid, in the presence of a diluent and with the exclusion of any moisture. The new sulfonic acid obtained in this way is said to be used for the preparation of dyes.
<I> Example: </I> 171.5 parts by weight of 3-chloro-4-methyl-6-methoxy-1-aminobenzene are dissolved in about 700 parts by weight of carbon tetrachloride. 116.5 parts by weight of chlorosulfonic acid are added dropwise with vigorous stirring and good cooling. The mixture is stirred for some time, the carbon tetrachloride distilled off is replaced by technical grade chlorotoluene and slowly heated to 160-170 ° C. Apparatus and other working conditions are the same as those given in the example of the main patent.
The 3-chloro-4-methyl-6-methoxy-1-aminobenzene-2-sulEo acid is a colorless powder after suction and drying, which can be recrystallized as the sodium salt from water and gives a diazo compound that is sparingly soluble in water.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE153693X | 1929-10-24 | ||
CH151675T | 1930-10-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH153693A true CH153693A (en) | 1932-03-31 |
Family
ID=25715850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH153693D CH153693A (en) | 1929-10-24 | 1930-10-23 | Process for the preparation of 3-chloro-4-methyl-6-methoxy-1-aminobenzene-2-sulfonic acid. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH153693A (en) |
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1930
- 1930-10-23 CH CH153693D patent/CH153693A/en unknown
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