CH128367A - Process for the preparation of B-naphtisatin. - Google Patents

Process for the preparation of B-naphtisatin.

Info

Publication number
CH128367A
CH128367A CH128367TA CH128367A CH 128367 A CH128367 A CH 128367A CH 128367T A CH128367T A CH 128367TA CH 128367 A CH128367 A CH 128367A
Authority
CH
Switzerland
Prior art keywords
preparation
naphtisatin
chloride
nitrobenzene
isatin
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
Priority to CH128367T priority Critical patent/CH128367A/en
Publication of CH128367A publication Critical patent/CH128367A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D209/56—Ring systems containing three or more rings
    • C07D209/58—[b]- or [c]-condensed
    • C07D209/60—Naphtho [b] pyrroles; Hydrogenated naphtho [b] pyrroles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Indole Compounds (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)

Description

  

      Verfahren    zur Darstellung von     f-Napiitisatiii.       Gegenstand vorliegender Erfindung ist  ein Verfahren zur Darstellung von     ss-Napht-          isatin;    das Verfahren ist dadurch gekenn  zeichnet, dass man ein     ss-IL        aphtyloxamin-          säurehalogenid,    zum     Beispiel        ss-Naphtyloxa-          minsäurechiorid    mit kondensierend wirkenden  Mitteln, zum Beispiel mit wasserfreiem  Aluminiumchlorid, Eisenchlorid usw., be  handelt.

   Die     Kondensation        kann    in Gegen  wart oder in     Abwesenheit    von     Lösungs-    oder       Suspensionsmitteln    ausgeführt werden.  



  Das     ss-Naplitisatin    ist     bekannt        (siele     zum Beispiel Berichte 21. 115).  



       Beispiel:     50     Gev%Tielitsteile        ss-\ap@t@-lo@amins@ure-          chlorid    vom     Schmelzpunkt    114 bis<B>115'</B>  werden in 200 Gewichtsteilen     Nitrobenzol     gelöst und unter     Rühren    allmählich 5 0 Ge  wichtsteile     wasserfreies        Aluminiumchloricl     zugefügt. Die Temperatur     beträgt    während    des     Eintragens    zweckmässig 40 bis<B>50'</B>  und kann zur Beendigung der Reaktion  schliesslich auf etwa 80   gesteigert werden.

    Wenn eine Probe nach dem     Abblasen    des  Lösungsmittels in verdünnter Natronlauge  vollkommen löslich ist, wird auf Eis ge  gossen und das     Nitrobenzol    mit     Wasser-          dampf        abdestilliert.    Das     Isatin        bleibt    in  Form einer dunkelroten kristallinischen Masse  zurück und kann auf dem     üblichen    Wege  gereinigt werden. Die Ausbeute beträgt<B>75</B>  bis 80 % der Theorie.



      Method for the presentation of f-Napiitisatiii. The present invention relates to a process for the preparation of ss-naphthisatin; the process is characterized in that an ß-IL aphtyloxamic acid halide, for example ß-naphtyloxamic acid chloride, is treated with agents having a condensing effect, for example with anhydrous aluminum chloride, iron chloride, etc.

   The condensation can be carried out in the presence or absence of solvents or suspending agents.



  The ss-naplitisatin is known (see for example reports 21. 115).



       Example: 50 Gev% Tielitsteile ss- \ ap @ t @ -lo @ amins @ ure- chloride with a melting point of 114 to 115 'are dissolved in 200 parts by weight of nitrobenzene and gradually 50 parts by weight of anhydrous aluminum chloricl with stirring added. The temperature is expediently 40 to 50 'during the introduction and can finally be increased to about 80 to end the reaction.

    If a sample is completely soluble in dilute sodium hydroxide solution after the solvent has been blown off, it is poured onto ice and the nitrobenzene is distilled off with steam. The isatin remains in the form of a dark red crystalline mass and can be purified in the usual way. The yield is <B> 75 </B> to 80% of theory.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von ss-Naliht- isatin, dadurch gekennzeichnet, dass man ein ss-t\Taphtt-loxaminsäurehalog-eiiid mit; konden- sierend wirkenden Mitteln behandelt. PATENT CLAIM: Process for the preparation of ss-Naliht- isatin, characterized in that one ss-t \ Taphtt-loxamic acid halo-eiiid with; treated with condensing agents.
CH128367T 1927-02-02 1927-02-02 Process for the preparation of B-naphtisatin. CH128367A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH128367T CH128367A (en) 1927-02-02 1927-02-02 Process for the preparation of B-naphtisatin.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH128367T CH128367A (en) 1927-02-02 1927-02-02 Process for the preparation of B-naphtisatin.
CH125716T 1927-02-02

Publications (1)

Publication Number Publication Date
CH128367A true CH128367A (en) 1928-10-16

Family

ID=25710543

Family Applications (1)

Application Number Title Priority Date Filing Date
CH128367T CH128367A (en) 1927-02-02 1927-02-02 Process for the preparation of B-naphtisatin.

Country Status (1)

Country Link
CH (1) CH128367A (en)

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