CH282630A - Process for the preparation of an indolyl-diphenylmethane dye. - Google Patents

Process for the preparation of an indolyl-diphenylmethane dye.

Info

Publication number
CH282630A
CH282630A CH282630DA CH282630A CH 282630 A CH282630 A CH 282630A CH 282630D A CH282630D A CH 282630DA CH 282630 A CH282630 A CH 282630A
Authority
CH
Switzerland
Prior art keywords
indolyl
dye
preparation
diphenylmethane dye
toluidine
Prior art date
Application number
Other languages
German (de)
Inventor
Michael Dr Erlenbach
Adolf Dr Sieglitz
Original Assignee
Michael Dr Erlenbach
Adolf Dr Sieglitz
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 Michael Dr Erlenbach, Adolf Dr Sieglitz filed Critical Michael Dr Erlenbach
Publication of CH282630A publication Critical patent/CH282630A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B11/00—Diaryl- or thriarylmethane dyes
    • C09B11/04—Diaryl- or thriarylmethane dyes derived from triarylmethanes, i.e. central C-atom is substituted by amino, cyano, alkyl
    • C09B11/26—Triarylmethane dyes in which at least one of the aromatic nuclei is heterocyclic

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

       

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 278943.    Verfahren zur Herstellung eines     Indolyl-diphenylmethanfarbatoffes.       Gegenstand     des    vorliegenden Zusatzpaten  tes ist ein Verfahren zur Herstellung eines       Indolyl-diphenylmethanfarbstoffes,    welches  dadurch     gekennzeichnet    ist, dass man     4,4'-Di-          chlorbenzophenon-3,3'-disulfosäure    mit     1,

  2-Di-          methylindol    in etwa molekularem Verhältnis  kondensiert und das erhaltene     Kondensations-          produkt    mit einem     überschuss    von     o-Toluidin     umsetzt.  



       Beispiel:     20 Gewichtsteile     4,4'-dichlorbenzophenon-          3,3'-disulfosaures    Natrium werden mit 6 Ge  wichtsteilen     1,2-Dimethylindol    in 100     Ge-          wiehtsteilen    30     Ihiger        Salzsäure    bei Gegenwart  von 30 Gewichtsteilen     Natriumsulfat    20 Stun  den bei etwa 60  C     kondensiert.    Das rote Zwi  schenprodukt wird isoliert und mit 150 Ge  wichtsteilen     o-Toluidin    5 Stunden bei 70 bis  80  C verschmolzen.

   Die     Farbstoffschmelze     wird zur Entfernung des überschüssigen     o-          Toluidins    mit Salzsäure     ausgerührt    und der  gebildete Farbstoff in verdünnter     Sodalösung     gelöst, filtriert und mit Kochsalz     ausgesalzen.       Das so erhaltene Produkt stellt ein violett  glänzendes Pulver dar, das Wolle und Seide  in leuchtenden     rotstichig    violetten Tönen  färbt, die sich durch sehr     gute    Echtheitseigen  schaften,     insbesondere    sehr     gute    Lichtechtheit,  auszeichnen.



  <B> Additional patent </B> to main patent no. 278943. Process for the production of an indolyl-diphenylmethane dye. The subject of the present additional patent is a process for the preparation of an indolyl-diphenylmethane dye, which is characterized in that 4,4'-dichlorobenzophenone-3,3'-disulfonic acid with 1,

  2-Dimethylindole is condensed in approximately a molecular ratio and the condensation product obtained is reacted with an excess of o-toluidine.



       Example: 20 parts by weight of 4,4'-dichlorobenzophenone-3,3'-disulfonic acid sodium are condensed with 6 parts by weight of 1,2-dimethylindole in 100 parts by weight of 30 Ihiger hydrochloric acid in the presence of 30 parts by weight of sodium sulfate for 20 hours at about 60.degree . The red intermediate product is isolated and fused with 150 parts by weight of o-toluidine at 70 to 80 C for 5 hours.

   To remove the excess o-toluidine, the dye melt is stirred up with hydrochloric acid and the dye formed is dissolved in dilute soda solution, filtered and salted out with sodium chloride. The product thus obtained is a shimmering violet powder that dyes wool and silk in bright reddish violet shades which are characterized by very good fastness properties, in particular very good lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Indolyl- diphenylmethanfarbstoffes, dadurch gekenn zeichnet, dass man 4,4'-Dichlorbenzophenon- 3,3'-disulfosäure mit 1,2-Dimethylindol in, etwa molekularem Verhältnis kondensiert und das erhaltene Kondensationsprodukt mit einem Überschuss von o-Toluidin umsetzt. Das so erhaltene Produkt stellt ein violett glänzendes Pulver dar, das Wolle und Seide in leuchtenden rotstichig violetten Tönen färbt, die sich durch sehr gute Eehtheitseigen- sehaften, PATENT CLAIM: A process for the production of an indolyl diphenylmethane dye, characterized in that 4,4'-dichlorobenzophenone-3,3'-disulfonic acid is condensed with 1,2-dimethylindole in an approximately molecular ratio and the resulting condensation product with an excess of o -Toluidine converts. The product obtained in this way is a shimmering violet powder that dyes wool and silk in bright reddish violet tones, which are characterized by very good integrity insbesondere sehr gute Lichtechtheit, auszeichnen. Der Farbstoff hat ,die folgende Zusammen setzung EMI0001.0045 especially very good lightfastness. The dye has the following composition EMI0001.0045
CH282630D 1949-04-23 1949-06-24 Process for the preparation of an indolyl-diphenylmethane dye. CH282630A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE282630X 1949-04-23
DE10649X 1949-06-01
CH278943T 1949-06-24

Publications (1)

Publication Number Publication Date
CH282630A true CH282630A (en) 1952-04-30

Family

ID=27178135

Family Applications (1)

Application Number Title Priority Date Filing Date
CH282630D CH282630A (en) 1949-04-23 1949-06-24 Process for the preparation of an indolyl-diphenylmethane dye.

Country Status (1)

Country Link
CH (1) CH282630A (en)

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