CH162351A - Process for the preparation of 1-iodo-8-oxynaphthalene-3,6-disulfonic acid. - Google Patents

Process for the preparation of 1-iodo-8-oxynaphthalene-3,6-disulfonic acid.

Info

Publication number
CH162351A
CH162351A CH162351DA CH162351A CH 162351 A CH162351 A CH 162351A CH 162351D A CH162351D A CH 162351DA CH 162351 A CH162351 A CH 162351A
Authority
CH
Switzerland
Prior art keywords
preparation
oxynaphthalene
disulfonic acid
iodo
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 CH162351A publication Critical patent/CH162351A/en

Links

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     1-Jod-8-ogynaphtalin-3.6-disulfosäure.       Das vorliegende Verfahren     betrifft    die  Darstellung von     1-Jod-8-oxynaphtalin-3.6-          disulfosäure    und ist dadurch gekennzeichnet,  dass man     1-Diazo-8.oxynaphtalin-3.6-disulfo-          säure    mit     Jodwasserstoffsäure    behandelt.

      <I>Beispiel:</I>  40     gr    trockene     1-Diazo-8-ogynaphtali        ii-3    .     6-          disulfosäure    werden in 100     em3    Wasser auf  geschlemmt und mit 30 cm' konzentrierter       Jodwasserstoffsäure    versetzt. Während man  auf dem Dampfbad die Temperatur langsam  steigert, setzt die Stickstoffentwicklung ein;  bei<B>70'</B> ist sie beendigt. Die abgekühlte  Masse wird     ausgeäthert    und mit festem Koch  salz gesättigt. Den entstandenen Brei presst  man nach einiger Zeit ab und kristallisiert  aus siedendem Wasser um, wobei beträcht  liche Mengen eines hellgrauen in Wasser  leicht löslichen Pulvers gewonnen werden.

           Das        so        erhaltene        Produkt        enthält        noch        0,6        %          NaCl.     
EMI0001.0025     
  
    Für <SEP> CioH607JS2Na: <SEP> 28,10% <SEP> J. <SEP> her.
<tb>  27,2% <SEP> J. <SEP> gef.       Die neue Verbindung kann als Zwischenpro..       dukt    zur Darstellung von Farbstoffen und  pharmazeutischen Produkten dienen.



  Process for the preparation of 1-iodo-8-ogynaphthalene-3,6-disulfonic acid. The present process relates to the preparation of 1-iodo-8-oxynaphthalene-3.6-disulfonic acid and is characterized in that 1-diazo-8.oxynaphthalene-3.6-disulfonic acid is treated with hydriodic acid.

      <I> Example: </I> 40 gr dry 1-diazo-8-ogynaphtali ii-3. 6-disulfonic acid is dissolved in 100 cubic meters of water and treated with 30 cm of concentrated hydriodic acid. While the temperature is slowly increased on the steam bath, the evolution of nitrogen begins; at <B> 70 '</B> it is finished. The cooled mass is etherified and saturated with solid cooking salt. The resulting pulp is pressed after a while and recrystallized from boiling water, with considerable amounts of a light gray powder that is easily soluble in water being obtained.

           The product obtained in this way still contains 0.6% NaCl.
EMI0001.0025
  
    For <SEP> CioH607JS2Na: <SEP> 28.10% <SEP> J. <SEP> her.
<tb> 27.2% <SEP> J. <SEP> found. The new compound can be used as an intermediate product for the preparation of dyes and pharmaceutical products.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von 1-Jod-8- oxynaphtalin-3.6-disulfosäure, dadurch ge kennzeichnet, dass man 1-Diazo-8-oxynaphta- lin-3.6-disulfosäure mit Jodwasserstoffsäure behandelt. Die neue Verbindung ist in trockenem Zustand ein leicht wasserlösliches, hellgraues kristallisiertes Pulver, welches als Zwischen produkt zur Darstellung von Farbstoffen und pharmazeutischen Produkten verwendet wer den kann. PATENT CLAIM: Process for the preparation of 1-iodo-8-oxynaphthalene-3.6-disulfonic acid, characterized in that 1-diazo-8-oxynaphthalene-3.6-disulfonic acid is treated with hydriodic acid. In the dry state, the new compound is an easily water-soluble, light-gray crystallized powder, which can be used as an intermediate product for the preparation of dyes and pharmaceutical products.
CH162351D 1932-02-29 1932-02-29 Process for the preparation of 1-iodo-8-oxynaphthalene-3,6-disulfonic acid. CH162351A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH162351T 1932-02-29
CH159408T 1933-10-04

Publications (1)

Publication Number Publication Date
CH162351A true CH162351A (en) 1933-06-15

Family

ID=25717226

Family Applications (1)

Application Number Title Priority Date Filing Date
CH162351D CH162351A (en) 1932-02-29 1932-02-29 Process for the preparation of 1-iodo-8-oxynaphthalene-3,6-disulfonic acid.

Country Status (1)

Country Link
CH (1) CH162351A (en)

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