CH137942A - Process for the preparation of a formaldehyde condensation product. - Google Patents

Process for the preparation of a formaldehyde condensation product.

Info

Publication number
CH137942A
CH137942A CH137942DA CH137942A CH 137942 A CH137942 A CH 137942A CH 137942D A CH137942D A CH 137942DA CH 137942 A CH137942 A CH 137942A
Authority
CH
Switzerland
Prior art keywords
condensation product
formaldehyde
preparation
formaldehyde condensation
formula
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Ind Basel filed Critical Chem Ind Basel
Publication of CH137942A publication Critical patent/CH137942A/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
    • C07D209/02—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom condensed with one carbocyclic ring
    • C07D209/04—Indoles; Hydrogenated indoles
    • C07D209/08—Indoles; Hydrogenated indoles with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to carbon atoms of the hetero ring

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Phenolic Resins Or Amino Resins (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Description

  

  Verfahren zur Herstellung eines     Formaldehydkondensationsproduktes.       Es wurde gefunden.     da,ss    die Herstellung  eines     Formaldehydkondensationsproduktes    in  einfacher und     glatter    Weise gelingt. wenn  man 1     Mol.        Formaldehyd'    auf 2     Mol.    1,3,3,5  Tetramethyl-2-methvlenindolin der     Formel:     
EMI0001.0009     
    einwirken     lä,sst.     



  Das gebildete Kondensationsprodukt der  Formel  
EMI0001.0011     
    welches ein für die Herstellung von Farb  stoffen geeignetes     Zwisehenprodukt    darstellt,    ist in den gebräuchlichen     Lösungsmitteln     löslich. Es bildet beim     Umkristallisieren        aug.     Methylalkohol     weisse    Nadeln vom Schmelz  punkt 150   und färbt sich     an    der Luft un  ter Bildung eines karmesinroten     basischen     Farbstoffes.  



  <I>Beispiel:</I>  Eine     Lösung    von 187 Teilen     1,3,3,5-          Tetramethyl-2-methylenindolin    in 500 Tei  len Alkohol     wird    mit 41.6 Teilen einer  38     %igen    Lösung von Formaldehyd bei<B>ge-</B>  wöhnlicher Temperatur versetzt. Alsbald be  ginnt die Temperatur zu steigen. Man     rührt     bei 30-35,  . wobei sich ein     weisser    kristal  liner Niederschlag abscheidet. Nach einigen  Stunden ist die Reaktion beendigt, und es  hat sich ein dicker Brei gebildet.

   Man kühlt  ab,     filtriert.    wäscht das     Reaktionsprodukt     mit Alkohol     aus,    und trocknet es im Vakuum  bei 30-35  .  



  Die     Kondensation    mit Formaldehyd  kann auch ohne     Verdünnungs-        bezw.        Lc,.          sungsmittel    ausgeführt werden.



  Process for the preparation of a formaldehyde condensation product. It was found. because the production of a formaldehyde condensation product succeeds in a simple and smooth manner. if 1 mole of formaldehyde is added to 2 moles of 1,3,3,5 tetramethyl-2-methylene indoline of the formula:
EMI0001.0009
    let act, sst.



  The formed condensation product of the formula
EMI0001.0011
    which is a suitable intermediate product for the production of dyes, is soluble in common solvents. On recrystallization it forms aug. Methyl alcohol white needles with a melting point of 150 and changes color when exposed to air, forming a crimson-red basic dye.



  <I> Example: </I> A solution of 187 parts of 1,3,3,5-tetramethyl-2-methyleneindoline in 500 parts of alcohol is mixed with 41.6 parts of a 38% solution of formaldehyde at <B> / B> normal temperature. The temperature soon began to rise. The mixture is stirred at 30-35. whereby a white crystalline liner precipitate separates out. After a few hours, the reaction is over and a thick paste has formed.

   It is cooled and filtered. washes the reaction product with alcohol, and dries it in vacuo at 30-35.



  The condensation with formaldehyde can be or without dilution. Lc ,. solvents are executed.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Form- aldehydkondensationsproduktes, dadurch ge- kennzeichnet, dass man 1 Mol. Formaldehyd auf 2 14Iol. 1,3,3,5-Tetramethyl-2-methylen- indolin der Formel: EMI0002.0011 einwirken läBt. Das gebildete Kondensationsprodukt der Formel: PATENT CLAIM: Process for the production of a formaldehyde condensation product, characterized in that 1 mol. Formaldehyde is added to 2 14Iol. 1,3,3,5-tetramethyl-2-methylene-indoline of the formula: EMI0002.0011 can act. The formed condensation product of the formula: EMI0002.0014 welches ein für die HerLtellung von Farb stoffen geeignetes Zwischenprodukt darstellt, ist in den gebräuchlichen Lösungsmitteln löslich. Es bildet beim Umkristallisieren au= Methylalkohol weisse Nadeln vom Schmelz punkt 150 und färbt sich an der Luft un ter Bildung eines karmesinroten basischen Farbstoffes. EMI0002.0014 which is an intermediate product suitable for the manufacture of dyes, is soluble in common solvents. When recrystallized, it forms white needles with a melting point of 150 from methyl alcohol and turns into a crimson-red basic dye when exposed to air.
CH137942D 1928-05-19 1928-05-19 Process for the preparation of a formaldehyde condensation product. CH137942A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH136380T 1928-05-19
CH137942T 1928-05-19

Publications (1)

Publication Number Publication Date
CH137942A true CH137942A (en) 1930-01-31

Family

ID=25712680

Family Applications (1)

Application Number Title Priority Date Filing Date
CH137942D CH137942A (en) 1928-05-19 1928-05-19 Process for the preparation of a formaldehyde condensation product.

Country Status (1)

Country Link
CH (1) CH137942A (en)

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