CH191409A - Process for the preparation of a Py-3-oxytetrahydro-8-oxynaphthoquinoline. - Google Patents

Process for the preparation of a Py-3-oxytetrahydro-8-oxynaphthoquinoline.

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Publication number
CH191409A
CH191409A CH191409DA CH191409A CH 191409 A CH191409 A CH 191409A CH 191409D A CH191409D A CH 191409DA CH 191409 A CH191409 A CH 191409A
Authority
CH
Switzerland
Prior art keywords
oxytetrahydro
oxynaphthoquinoline
preparation
oxynaphthalene
epichlorohydrin
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH191409A publication Critical patent/CH191409A/en

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Description

  

  Verfahren zur Herstellung eines     Py-3-Oxytetrahydro-8-oxynaphthoehinolins.       Nach dem im Hauptpatent beschriebenen  Verfahren erhält man das als Ausgangs  stoff für die     Farbstoffherstellung        brauchbare          Py    - 3 -     Oxytetrahydro    - 7 -     oxynaphthochinolin,     wenn man     1-Amino    - 5 -     oxynaphthalin    mit       Epichlorhydrin    kondensiert.  



  Wie nun weiter gefunden wurde, kann  man in ganz analoger Weise ein     Py-3-          Oxytetrahydro    - 8 -     oxynaphthochinolin    erhal  ten, wenn man     1-Amino-6-oxynaphthalin    mit       Epichlorhydrin    bei erhöhter Temperatur zur  Umsetzung bringt. Der neue Endstoff dient  ebenfalls als Ausgangsmaterial für die Her  stellung von Farbstoffen.         Beispiel:     160 Teile     1-Amino-6-oxynaphthalin    wer  den mit 500 Teilen     Amylalkohol    und 120  Teilen     Epichlorhydrin    innerhalb einer Stunde  unter Rühren auf 125 bis<B>130'</B> erhitzt.

   Man  hält diese Temperatur etwa 8 Stunden, lässt  erkalten, saugt dann den ausgeschiedenen       Kristallbrei    ab und wäscht mit Aceton nach.    Es werden 138 Teile Chlorhydrat des     Py-3-          Oxytetrahydro    -8-     oxynaphthochinolins    erhal  ten = 54,6     %    der Theorie. Das Chlorhydrat  ist in Wasser leicht löslich; die daraus durch  Fällung mit     Natriumacetat    und     Umkristal-          lisieren    aus verdünntem Alkohol     gewonnene     Base hat den     Fp    206 bis 207  .



  Process for the preparation of a Py-3-oxytetrahydro-8-oxynaphthoehinoline. According to the process described in the main patent, Py - 3 - oxytetrahydro - 7 - oxynaphthoquinoline, useful as a starting material for dye production, is obtained when 1-amino - 5 - oxynaphthalene is condensed with epichlorohydrin.



  As has now been found further, a Py-3-oxytetrahydro-8-oxynaphthoquinoline can be obtained in a very analogous manner if 1-amino-6-oxynaphthalene is reacted with epichlorohydrin at elevated temperature. The new end product also serves as the starting material for the manufacture of dyes. Example: 160 parts of 1-amino-6-oxynaphthalene are heated with 500 parts of amyl alcohol and 120 parts of epichlorohydrin to 125 to 130 'within one hour while stirring.

   This temperature is kept for about 8 hours, allowed to cool, then the precipitated crystal pulp is suctioned off and washed with acetone. There are 138 parts of py-3-oxytetrahydro-8-oxynaphthoquinoline hydrate obtained = 54.6% of theory. The chlorine hydrate is easily soluble in water; the base obtained therefrom by precipitation with sodium acetate and recrystallization from dilute alcohol has mp 206 to 207.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Py-3- Oxytetrahydro - 8 - oxynaphthochinolins, da durch gekennzeichnet, dass man 1-Amino- 6-oxynaphthalin mit Epichlorhydrin in einem organischen Lösungsmittel auf erhöhte Tem peratur erhitzt und aus dem Kondensations produkt die Base in Freiheit setzt. Die freie Base schmilzt bei 206 bis 207 und kann. als Vorprodukt für die Herstellung von Azo- farbstoffen verwendet werden. PATENT CLAIM: Process for the production of a Py-3-Oxytetrahydro-8-oxynaphthoquinoline, characterized in that 1-amino-6-oxynaphthalene is heated with epichlorohydrin in an organic solvent to an elevated temperature and the base is released from the condensation product . The free base melts at 206-207 and can. can be used as a preliminary product for the production of azo dyes.
CH191409D 1935-02-20 1935-11-12 Process for the preparation of a Py-3-oxytetrahydro-8-oxynaphthoquinoline. CH191409A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE191409X 1935-02-20
CH186845T 1935-11-12

Publications (1)

Publication Number Publication Date
CH191409A true CH191409A (en) 1937-06-15

Family

ID=25721419

Family Applications (1)

Application Number Title Priority Date Filing Date
CH191409D CH191409A (en) 1935-02-20 1935-11-12 Process for the preparation of a Py-3-oxytetrahydro-8-oxynaphthoquinoline.

Country Status (1)

Country Link
CH (1) CH191409A (en)

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