CH121480A - Process for the preparation of a w-aminoalkylaminonaphthalene. - Google Patents
Process for the preparation of a w-aminoalkylaminonaphthalene.Info
- Publication number
- CH121480A CH121480A CH121480DA CH121480A CH 121480 A CH121480 A CH 121480A CH 121480D A CH121480D A CH 121480DA CH 121480 A CH121480 A CH 121480A
- Authority
- CH
- Switzerland
- Prior art keywords
- sep
- water
- preparation
- colorless
- soluble
- Prior art date
Links
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines co-Aminoalliylaminonaphtalins. Es wurde gefunden, dass ein uo-Amino- alky laminonaphta-lin dadurch erhalten wer den kann, da.ss man auf 1-Naphtol-2-karbon- säure Äthylendiamin und Salze der schwef ligen Säure einwirken lässt. Man erhält die neue Verbindung, das w-Aminoäthyl-l- aminonaphtalin, nach diesem Verfahren in vorzüglicher Reinheit und Ausbeute.
Die neue Verbindung ist in Wasser schwer löslich; sie löst sich aber leicht in Mineralsäuren und bildet mit Salzsäure ein in farblosen Nädelchen kristallisierendes Chlorhydrat.
Das co-Aminoäthyl-l-aminona.phtalin soll zur Darstellung von Farbstoffen und phar mazeutischen Produkten Verwendung finden. <I>Beispiel:</I> 225 Gewichtsteile 1-Naphto.l-2-karbon- säure werden mit 180 Gewichtsteilen heissem Wasser und 150 Gewichtsteilen Äthylen diaminhydrat oder der entsprechenden Menge einer 20 %igen wässerigen Lösung der Base versetzt. Nach Zusatz von 2400 .Gewichts teilen Natriumbisulfitlösung 40 Be erwärmt man unter Rühren auf dem Wasserbade bis zur Beendigung der Kohlendioxydentwick lung.
Dann macht man die heisse Reaktions flüssigkeit schwach natronalkalisch und lässt bei etwa<B>90'</B> unter öfterem Umschütteln stehen. Um beigemischtes 1-Naphtol zu ent fernen, filtriert man die warme Flüssigkeit. Der mit Wasser gewaschene Filterrückstand wird mit 150 Volumteilen konzentrierter Salzsäure und 2500 Volumteilen Wasser un ter Rühren ausgekocht. Dann filtriert man heiss. Das erkaltete Filtrat versetzt man mit so viel Natronlauge, dass es kräftig alkalisch reagiert. Das co-Aminoäthyl-l-aminonaphta- lin scheidet sich in farblosen Flocken ab.
Man filtriert; wäscht mit Wasser aus; um sie zu reinigen, übergiesst man die Base mit Salz säure und erhält so das Chlorhydrat des co- Aminoäthyl-l-naphtylamins, welches in farb losen Nädelchen kristallisiert und in Wasser leicht löslich ist.
Process for the preparation of a co-aminoalliylaminonaphthalene. It has been found that a uo-aminoalkyl laminonaphta-lin can be obtained by allowing ethylenediamine and salts of sulphurous acid to act on 1-naphthol-2-carbonic acid. The new compound, w-aminoethyl-l-aminonaphthalene, is obtained by this process in excellent purity and yield.
The new compound is sparingly soluble in water; but it dissolves easily in mineral acids and forms with hydrochloric acid a hydrochloride which crystallizes in colorless needles.
The co-Aminoäthyl-l-aminona.phtalin is to be used for the representation of dyes and pharmaceutical products. <I> Example: </I> 225 parts by weight of 1-Naphto.l-2-carbonic acid are mixed with 180 parts by weight of hot water and 150 parts by weight of ethylene diamine hydrate or the corresponding amount of a 20% strength aqueous solution of the base. After adding 2400 parts by weight of sodium bisulfite solution 40 Be it is heated with stirring on the water bath until the development of carbon dioxide has ended.
Then the hot reaction liquid is made slightly alkaline in soda and left at about <B> 90 '</B> with frequent shaking. To remove any added 1-naphthol, the warm liquid is filtered. The filter residue, washed with water, is boiled with 150 parts by volume of concentrated hydrochloric acid and 2500 parts by volume of water while stirring. Then it is filtered hot. The cooled filtrate is mixed with enough sodium hydroxide solution that it reacts strongly alkaline. The co-aminoethyl-1-aminonaphthalene separates out in colorless flakes.
Filter; washes out with water; to clean them, the base is poured over with hydrochloric acid and the hydrochloride of co-aminoethyl-l-naphthylamine is obtained, which crystallizes in colorless needles and is easily soluble in water.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH121480T | 1925-07-22 | ||
CH116991T | 1926-10-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH121480A true CH121480A (en) | 1927-07-01 |
Family
ID=25708766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH121480D CH121480A (en) | 1925-07-22 | 1925-07-22 | Process for the preparation of a w-aminoalkylaminonaphthalene. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH121480A (en) |
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1925
- 1925-07-22 CH CH121480D patent/CH121480A/en unknown
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