CH101089A - Process for the preparation of a vat dye of the indirubin series. - Google Patents

Process for the preparation of a vat dye of the indirubin series.

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Publication number
CH101089A
CH101089A CH101089DA CH101089A CH 101089 A CH101089 A CH 101089A CH 101089D A CH101089D A CH 101089DA CH 101089 A CH101089 A CH 101089A
Authority
CH
Switzerland
Prior art keywords
indirubin
series
preparation
vat dye
brown
Prior art date
Application number
Other languages
German (de)
Inventor
Farbenfabriken Vorm Friedr Co
Original Assignee
Farbenfab Vorm Bayer F & Co
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 Farbenfab Vorm Bayer F & Co filed Critical Farbenfab Vorm Bayer F & Co
Publication of CH101089A publication Critical patent/CH101089A/en

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  Verfahren zur Darstellung eines     Nüpenfarbstoffes    der     Indirubinreihe.       Es wurde gefunden,     dass    man zu einem  neuen klaren,     gelbstirIiigbraunenKüpenfarb-          stoff    dadurch gelangt,     dass    das in den Anna  len der Chemie<B>388, 1919-,</B> Seite<B>10</B>     beselirie-          bene    2<B>-</B>     1-Naphtooxyihiophen    mit<B>5 -</B>     7-Di-          brornisatin    kondensiert wird.

      <I>Beispiel:</I>    200 Gewichtsteile 2<B>-</B>     1-Naplitooxythiophen     und<B>305</B> Gewichtsteile<B>5 -</B>     7-Dibromisatin    wer  den in Eisessig gelöst, mit etwas konzen  trierter     Salzsiure    zersetzt und eine Stunde  lang im Wasserbad erhitzt; der Farbstoff       bl     wird abgesaugt und isoliert. Ausbeute<B>90</B>  der Theorie.  



  Er bildet ein braunes, kristallinisches  Pulver, das sieh in organischen Lösungsmit  teln nur sehr schwer, in konzentrierter     Schwe-          felsätire    wenig mit     rotviole-Her,    in Mono  hydrat leicht mit     blauvioleiter    Farbe löst.  Mit     Ilydrosulfit    und     Natronlauge    entsteht       z#       eine gelbe     Küpe,    aus welcher die Textilfaser  in klaren,     gelbstichig    braunen Tönen -von  ausgezeichneter Echtheit angefärbt wird.



  Process for the preparation of a nub dye of the indirubin series. It has been found that a new, clear, yellowish-brown vat dye can be obtained by using the 2 described in Annals der Chemie <B> 388, 1919-, </B> page <B> 10 </B> <B> - </B> 1-naphtooxyihiophene is condensed with <B> 5 - </B> 7-dibrornisatin.

      <I> Example: </I> 200 parts by weight of 2 <B> - </B> 1-naplitooxythiophene and <B> 305 </B> parts by weight of <B> 5 - </B> 7-dibromoisatin are dissolved in glacial acetic acid , decomposed with a little concentrated hydrochloric acid and heated in a water bath for one hour; the dye bl is filtered off and isolated. Yield <B> 90 </B> of theory.



  It forms a brown, crystalline powder which, in organic solvents, dissolves only with great difficulty, in concentrated sulfuric acid it dissolves little with red violet, and in monohydrate easily with a blue-violet color. With Ilydrosulfite and sodium hydroxide solution, a yellow vat is created from which the textile fiber is dyed in clear, yellowish brown shades of excellent fastness.

Claims (1)

PATENTANSPP.-UOH: Verfahren zur Darstellung eines neuen Nüpenfarbstoffes der Indirubinreihe, darin bestehend, dass man das 2<B>-</B> 1-Naplitooxythio- phen mit<B>5 -</B> 7-Dibromisatin kondensiert. Er bildet ein braunes, kristalliniscUes Pulver, das sich in organischen Lösungsmit- to-In nur sehr schwer, in konzentrierter Schwe felsäure wenig mit rotvioletter, in Kono- hydra,t leicht mit blauvioletter Farbe löst. PATENTANSPP.-UOH: Process for the preparation of a new pebble dye of the indirubin series, consisting in condensing the 2 - 1-naplitooxythiophene with 5 - 7-dibromisatin. It forms a brown, crystalline powder which dissolves in organic solvents only with great difficulty, in concentrated sulfuric acid slightly with a red-violet color, in conohydra, easily with a blue-violet color. Mit Hydrosulfit und Natronlauge entsteht eine gelbe Küpe, aus welcher die Textilfaser in klaren, gelbstichig braunen Tönen von aus gezeichneter Echtheit angefärbt wird. With hydrosulfite and caustic soda, a yellow vat is created, from which the textile fiber is dyed in clear, yellow-tinged brown tones of excellent authenticity.
CH101089D 1921-03-26 1922-03-18 Process for the preparation of a vat dye of the indirubin series. CH101089A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE101089X 1921-03-26

Publications (1)

Publication Number Publication Date
CH101089A true CH101089A (en) 1923-09-01

Family

ID=5648765

Family Applications (1)

Application Number Title Priority Date Filing Date
CH101089D CH101089A (en) 1921-03-26 1922-03-18 Process for the preparation of a vat dye of the indirubin series.

Country Status (1)

Country Link
CH (1) CH101089A (en)

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