CH265711A - Process for the preparation of a derivative of 4-methyl-7-amino-coumarin. - Google Patents
Process for the preparation of a derivative of 4-methyl-7-amino-coumarin.Info
- Publication number
- CH265711A CH265711A CH265711DA CH265711A CH 265711 A CH265711 A CH 265711A CH 265711D A CH265711D A CH 265711DA CH 265711 A CH265711 A CH 265711A
- Authority
- CH
- Switzerland
- Prior art keywords
- coumarin
- amino
- methyl
- preparation
- derivative
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
- C07D311/06—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 2
- C07D311/08—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 2 not hydrogenated in the hetero ring
- C07D311/16—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 2 not hydrogenated in the hetero ring substituted in position 7
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Plural Heterocyclic Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines Devivats des 4-Methyl-7-amino-cumarins. Es wurde gefunden, dass man zu einem Derivat des 4-Methyl-7-amino-cumarins ge langt, wenn man 4-Methyl-7-amino-cumarin mit Monochloressigsäure umsetzt.
Die Umsetzung kann z. B. in der Weise vorgenommen werden, dass man 4-Methyl-7- amino-cumarin mit einer wässrigen Lösung eines Alkalisalzes der Monochloressigsäure, vorteilhaft in Gegenwart eines säurebinden den Mittels, auf 70-90n C erhitzt, bis das Ausgangsmaterial in Lösung gegangen ist.
Das Natriumsalz der so erhaltenen neuen Carbonsäure bildet ein helles Pulver, das von Wasser zu einer violettblau fluoreszierenden Lösung aufgenommen wird. Es kann als optisches Bleichmittel für Wolle verwendet werden.
Beispiel: Zu einer Lösung von 3 Teilen Monochlor essigsäure, 2,6 Teilen Natriumcarbonat und 30 Teilen Wasser gibt man 3,5 Teile 4-Methyl- 7-amino-cumarin. Man rührt 15 Stunden bei 70-90 C, lässt erkalten, neutralisiert mit verdünnter Schwefelsäure, filtriert nötigen falls von noch anwesendem Ausgangsstoff ab und dampft das Filtrat zur Trockne ein. Man erhält ein in Wasser lösliches, helles Pulver. Die Lösung fluoresziert violettblau.
Process for the preparation of a derivative of 4-methyl-7-amino-coumarin. It has been found that a derivative of 4-methyl-7-amino-coumarin is obtained if 4-methyl-7-amino-coumarin is reacted with monochloroacetic acid.
The implementation can e.g. B. be carried out in such a way that 4-methyl-7-amino-coumarin with an aqueous solution of an alkali salt of monochloroacetic acid, advantageously in the presence of an acid-binding agent, heated to 70-90N C until the starting material has dissolved .
The sodium salt of the new carboxylic acid obtained in this way forms a light powder which is absorbed by water to form a violet-blue fluorescent solution. It can be used as an optical bleach for wool.
Example: 3.5 parts of 4-methyl-7-amino-coumarin are added to a solution of 3 parts of monochloroacetic acid, 2.6 parts of sodium carbonate and 30 parts of water. The mixture is stirred for 15 hours at 70-90 ° C., allowed to cool, neutralized with dilute sulfuric acid, any starting material which is necessary is filtered off and the filtrate is evaporated to dryness. A pale powder which is soluble in water is obtained. The solution fluoresces purple-blue.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH265711T | 1946-06-14 | ||
CH260835T | 1946-06-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH265711A true CH265711A (en) | 1949-12-15 |
Family
ID=25730337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH265711D CH265711A (en) | 1946-06-14 | 1946-06-14 | Process for the preparation of a derivative of 4-methyl-7-amino-coumarin. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH265711A (en) |
-
1946
- 1946-06-14 CH CH265711D patent/CH265711A/en unknown
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