CH179946A - Process for the preparation of 2-iodo-3-oxynaphthalene-6,8-disulfonic acid. - Google Patents

Process for the preparation of 2-iodo-3-oxynaphthalene-6,8-disulfonic acid.

Info

Publication number
CH179946A
CH179946A CH179946DA CH179946A CH 179946 A CH179946 A CH 179946A CH 179946D A CH179946D A CH 179946DA CH 179946 A CH179946 A CH 179946A
Authority
CH
Switzerland
Prior art keywords
oxynaphthalene
iodo
disulfonic acid
preparation
acid
Prior art date
Application number
Other languages
German (de)
Inventor
Sandoz Chemische Fabri Vormals
Original Assignee
Chem Fab Vormals Sandoz
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 Chem Fab Vormals Sandoz filed Critical Chem Fab Vormals Sandoz
Publication of CH179946A publication Critical patent/CH179946A/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung von     2-Jod-3-oxynaphtalin-6,8-disulfosäure.       Das vorliegende Verfahren betrifft die  Darstellung der     2-Jod-3-oxynaphtalin-6.8-          disulfosäure    und ist dadurch gekennzeich  net, dass man 2 . 3 . 6 .     8-Diazonaphtol-disulfo-          säure    mit     Jodwasserstoffsäure    erwärmt.

           Beispiel:       Die in üblicher Weise hergestellte     Di-          -@zoniumverbindung    aus 36 g     2-Amino-3-oxy-          iiaphtalin-6-8-disulfosäure    wird in 60 cm'       Jodwasserstoffsäure    (zirka     25/'0)    eingetragen  und die erhaltene Suspension auf<B>50'</B> C er  wärmt. Nach dem Aufhören der Stickstoff  entwicklung wird die Lösung     mit    dem glei  chen Volumen einer gesättigten Kochsalz  lösung versetzt, wobei das neue Produkt in  Form schwach rötlicher Nadeln ausfällt.  



  Die     2-Jod-3-oxynaphtalin-6.8-disulfo-          äure    besitzt die Formel  
EMI0001.0017     
    und enthält als     Dinatriumsalz    26,53 % J und  9,52 % Na..



  Process for the preparation of 2-iodo-3-oxynaphthalene-6,8-disulfonic acid. The present method relates to the preparation of 2-iodo-3-oxynaphthalene-6.8-disulfonic acid and is characterized in that 2. 3. 6th 8-Diazonaphthol-disulfonic acid heated with hydriodic acid.

           Example: The di- - @ zonium compound prepared in the usual way from 36 g of 2-amino-3-oxy-iiaphthalene-6-8-disulfonic acid is introduced into 60 cm 'hydriodic acid (about 25 /' 0) and the suspension obtained is < B> 50 '</B> C it warms up. After the nitrogen development has ceased, the solution is mixed with the same volume of a saturated saline solution, the new product precipitating in the form of slightly reddish needles.



  The 2-iodo-3-oxynaphthalene-6.8-disulfonic acid has the formula
EMI0001.0017
    and contains as disodium salt 26.53% J and 9.52% Na ..

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung der 2-Jod-3- oxynaphtalin-6.8-disulfosäure, dadurch ge kennzeichnet, dass man 2. 3. 6. 8-Diazonaph- toldisulfosäure mit Jodwasserstoffsäure er wärmt. Die 2-Jod-3-oxynaphtalin-6.8-di- sulfosäure besitzt die Formel EMI0001.0026 und enthält als Dinatriumsalz 26,53 % J und <B>9,52%</B> Na. Die Verbindung besteht aus schwach rötlichen Nadeln. Das Produkt kann als Zwischenprodukt bei der Herstellung von Farbstoffen, sowie zu therapeutischen Zwecken verwendet wer den. PATENT CLAIM: Process for the preparation of 2-iodo-3-oxynaphthalene-6.8-disulfonic acid, characterized in that 2, 3, 6, 8-diazonaph-toldisulfonic acid is warmed with hydriodic acid. The 2-iodo-3-oxynaphthalene-6.8-disulfonic acid has the formula EMI0001.0026 and as disodium salt contains 26.53% I and <B> 9.52% </B> Na. The connection consists of pale reddish needles. The product can be used as an intermediate in the manufacture of dyes and for therapeutic purposes.
CH179946D 1933-10-04 1933-10-04 Process for the preparation of 2-iodo-3-oxynaphthalene-6,8-disulfonic acid. CH179946A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH179946T 1933-10-04
CH159408T 1933-10-04

Publications (1)

Publication Number Publication Date
CH179946A true CH179946A (en) 1935-09-30

Family

ID=25717228

Family Applications (1)

Application Number Title Priority Date Filing Date
CH179946D CH179946A (en) 1933-10-04 1933-10-04 Process for the preparation of 2-iodo-3-oxynaphthalene-6,8-disulfonic acid.

Country Status (1)

Country Link
CH (1) CH179946A (en)

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