CH136552A - Process for the preparation of a descendant of the pyrazolanthrone. - Google Patents
Process for the preparation of a descendant of the pyrazolanthrone.Info
- Publication number
- CH136552A CH136552A CH136552DA CH136552A CH 136552 A CH136552 A CH 136552A CH 136552D A CH136552D A CH 136552DA CH 136552 A CH136552 A CH 136552A
- Authority
- CH
- Switzerland
- Prior art keywords
- pyrazolanthrone
- preparation
- yellow
- potash
- reaction
- Prior art date
Links
Landscapes
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Description
Verfahren zur Darstellung eines Abkömmlinges des Pyrazolanthrons. Gegenstand der vorliegenden Erfindung ist ein Verfahren zur Darstellung von Py-l- a-Anthrachinonylpyrazolanthron der Formel:
EMI0001.0005
durch Aufeinanderwirkenlassen von Pyrazol- anthron, a-Chloranthrachinon und Pottasche. Das erhaltene Produkt findet zur Herstellung von Küpenfarbstoffen Verwendung.
Beispiel: 45 Gewichtsteile Pyrazolaiithron, 25 Ge wichtsteile a-Chloranthrachinon, 30 Gewichts teile Kaliumkarbonat werden nach Zugabe einer Spur eines Kupfersalzes in 400-500 Gewichtsteilen Nitrobenzol während etwa 12 Stunden zum gelinden Sieden des Lösungs mittels erhitzt, während die Masse dauernd gerührt wird. Nach dem Erkalten wird mit Äthylalkohol verdünnt, abgesaugt und mit Alkohol und Wasser nachgewaschen und ge trocknet.
Das Py-l-a-Anthrachinonylpyrazol- anthron hinterbleibt als gelbbraunes Pulver, löst sich in konzentrierter Schwefelsäure mit gelbroter Farbe, liefert mit alkalischem Hydro- sulfit eine braunrote Küpe, aus der die Baum- wollfaser nur in äusserst schwachen gelblichen Tönen angefärbt wird.
Das gleiche Produkt wird erhalten, wenn zunächst Pyrazolanthron und wasserfreies Kaliumkarbonat in Nitrobenzol erhitzt werden, bis das Kalisalz des Pyrazolanthrons ent standen ist, und dieses dann weiter mit a- Chloranthrachinon nach dem oben angegebenen Verfahren in Reaktion gebracht wird.
Process for the preparation of a descendant of the pyrazolanthrone. The present invention relates to a process for the preparation of Py-l-a-anthraquinonylpyrazole anthrone of the formula:
EMI0001.0005
by allowing pyrazole anthrone, α-chloroanthraquinone and potash to interact. The product obtained is used for the production of vat dyes.
Example: 45 parts by weight of pyrazolaiithrone, 25 parts by weight of a-chloroanthraquinone, 30 parts by weight of potassium carbonate are heated to gentle boiling of the solvent for about 12 hours after adding a trace of a copper salt in 400-500 parts by weight of nitrobenzene, while the mass is continuously stirred. After cooling, it is diluted with ethyl alcohol, filtered off with suction, washed with alcohol and water and dried.
The py-l-a-anthraquinonylpyrazole anthrone remains as a yellow-brown powder, dissolves in concentrated sulfuric acid with a yellow-red color, and with alkaline hydrosulfite provides a brown-red vat from which the cotton fiber is only colored in extremely faint yellowish tones.
The same product is obtained if pyrazolanthrone and anhydrous potassium carbonate are first heated in nitrobenzene until the potassium salt of pyrazolanthrone is formed, and this is then further reacted with a-chloranthraquinone by the method given above.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE136552X | 1926-10-22 | ||
| CH133473T | 1927-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH136552A true CH136552A (en) | 1929-11-15 |
Family
ID=25712077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH136552D CH136552A (en) | 1926-10-22 | 1927-10-22 | Process for the preparation of a descendant of the pyrazolanthrone. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH136552A (en) |
-
1927
- 1927-10-22 CH CH136552D patent/CH136552A/en unknown
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CH136552A (en) | Process for the preparation of a descendant of the pyrazolanthrone. | |
| DE921265C (en) | Process for the preparation of aryl-substituted pyrazoline compounds | |
| DE948348C (en) | Process for the preparation of a nitro dye | |
| CH308489A (en) | Process for the preparation of a dye of the dioxazine series. | |
| DE581239C (en) | Process for the production of benzanthronaldehyde | |
| CH257943A (en) | Process for the production of a vat dye. | |
| CH257944A (en) | Process for the production of a vat dye. | |
| DE523692C (en) | Process for the preparation of aminosulfonic acid arylamides of 2íñ3-oxynaphthoic acid | |
| DE589079C (en) | Process for the production of dibenzanthrone | |
| CH292304A (en) | Process for the production of a vat dye. | |
| CH101090A (en) | Process for the production of an indigoid dye. | |
| CH238633A (en) | Process for the production of a vat dye. | |
| CH136546A (en) | Process for the preparation of a descendant of the pyrazolanthrone. | |
| CH389626A (en) | Process for the preparation of a, B-di- (imidazyl- (2)) - ethylenes | |
| CH256770A (en) | Process for the production of an anthraquinone derivative. | |
| CH120257A (en) | Process for the preparation of a new oxynaphthalene carboxylic acid. | |
| CH274700A (en) | Process for the production of a vat dye. | |
| CH251643A (en) | Process for the preparation of the a, B-di- (benzimidazyl- (2)) - ethylene. | |
| CH162633A (en) | Process for the preparation of an oxybenzolo-quinolinecarboxylic acid. | |
| CH256769A (en) | Process for the production of an anthraquinone derivative. | |
| CH169686A (en) | Process for the preparation of a nitro derivative of 13,13'-dibenzanthronyl. | |
| CH136553A (en) | Process for the preparation of a descendant of the pyrazolanthrone. | |
| CH256772A (en) | Process for the production of an anthraquinone derivative. | |
| CH250662A (en) | Process for the production of an anthraquinone derivative. | |
| CH252953A (en) | Process for the production of a vat dye. |