CH143891A - Process for the preparation of an o-cyanarylrhodane compound. - Google Patents

Process for the preparation of an o-cyanarylrhodane compound.

Info

Publication number
CH143891A
CH143891A CH143891DA CH143891A CH 143891 A CH143891 A CH 143891A CH 143891D A CH143891D A CH 143891DA CH 143891 A CH143891 A CH 143891A
Authority
CH
Switzerland
Prior art keywords
compound
preparation
rhodane
cyanarylrhodane
cyanaphthalene
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH143891A publication Critical patent/CH143891A/en

Links

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung einer     o-Cyanarylrhodanverbindung.       Vorliegendes Patent bezieht sich auf ein  Verfahren zur Darstellung einer     o-Cyanaryl-          rhodanverbindung,    dadurch gekennzeichnet,       (Lass    man     1-Rhodan-2-aminonaphthalin        diazo-          tiert    und die so erhaltene     Diazoverbindung     durch     Einwirkung    einer     Kupfercyanürlösung     in     1-Rhodan-2-cyannaphthalin    überführt.  



  Die neue Verbindung kristallisiert aus  Spiritus in farblosen Nadeln vom Schmelz  punkt 185-136  , ist leicht löslich in orga  nischen Lösungsmitteln, unlöslich in Wasser  und kalter Natronlauge. Sie soll als Zwi  schenprodukt zur Herstellung von Farbstof  fen verwendet werden.  



  <I>Beispiel:</I>  50 kg     I-Rhodan-2-aminonaphthalin    wer  den in überschüssiger verdünnter Salzsäure  gelöst und bei 8-10   mit der berechneten       Menge    Nitrit     diazotiert.    Dann giesst man die       Diazolösung    bei 50-60   in eine Kupfer  cyanürlösung, die aus 82 kg Kupfersulfat    und 58 kg     Cyannatrium    unter Zusatz von  200 kg N     atriumbikarbonat    bereitet ist. Nach  kurzer Zeit wird abgekühlt und das ausge  schiedene     1-Rhodan-2-cyannaphthalin        abfil-          triert.  



  Process for the preparation of an o-cyanarylrhodane compound. The present patent relates to a process for the preparation of an o-cyanaryl rhodane compound, characterized in that (1-rhodane-2-aminonaphthalene is diazoated and the diazo compound thus obtained is converted into 1-rhodane-2-cyanaphthalene by the action of a copper cyanuric solution .



  The new compound crystallizes from alcohol in colorless needles with a melting point of 185-136, is easily soluble in organic solvents, insoluble in water and cold caustic soda. It should be used as an inter mediate product for the production of dyes.



  <I> Example: </I> 50 kg of I-rhodan-2-aminonaphthalene are dissolved in excess dilute hydrochloric acid and diazotized at 8-10 with the calculated amount of nitrite. The diazo solution is then poured into a copper cyanuric solution at 50-60, which is prepared from 82 kg of copper sulfate and 58 kg of cyan sodium with the addition of 200 kg of sodium bicarbonate. After a short time it is cooled and the precipitated 1-rhodane-2-cyanaphthalene is filtered off.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung einer o-Cyan- arylrhodanverbindung, dadurch gekennzeich net, dass man 1-Rhodan-2-aminonaphthalin diazotiert und die so erhaltene Diazoverbin- dung durch Einwirkung einer Kupfercyaniir- lösung in 1-Rhodan-2-cyannaphthalin über führt. Die neue Verbindung kristallisiert aus Spiritus in farblosen Nadeln vom Schmelz punkt 185-l36 , ist leicht löslich in orga nischen Lösungsmitteln, unlöslich in Wasser und kalter Natronlauge. PATENT CLAIM: Process for the preparation of an o-cyanoarylrhodane compound, characterized in that 1-rhodane-2-aminonaphthalene is diazotized and the diazo compound obtained in this way is converted into 1-rhodane-2-cyanaphthalene by the action of a copper cyanide solution. The new compound crystallizes from alcohol in colorless needles with a melting point of 185-136, is easily soluble in organic solvents, insoluble in water and cold caustic soda.
CH143891D 1927-03-17 1928-03-14 Process for the preparation of an o-cyanarylrhodane compound. CH143891A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE143891X 1927-03-17
CH140087T 1928-03-14

Publications (1)

Publication Number Publication Date
CH143891A true CH143891A (en) 1930-11-30

Family

ID=25713443

Family Applications (1)

Application Number Title Priority Date Filing Date
CH143891D CH143891A (en) 1927-03-17 1928-03-14 Process for the preparation of an o-cyanarylrhodane compound.

Country Status (1)

Country Link
CH (1) CH143891A (en)

Similar Documents

Publication Publication Date Title
CH143891A (en) Process for the preparation of an o-cyanarylrhodane compound.
CH143889A (en) Process for the preparation of an o-cyanarylrhodane compound.
CH143890A (en) Process for the preparation of an o-cyanarylrhodane compound.
DE553627C (en) Process for the preparation of oxybenzocarbazole carboxylic acids
DE511211C (en) Process for the preparation of o-cyanaryirhodane compounds
CH192979A (en) Process for the preparation of an azo dye which is capable of forming metal compounds.
CH150785A (en) Process for the preparation of a diazoamino compound.
CH182278A (en) Process for the preparation of an azo dye.
CH169955A (en) Process for the preparation of a substantive azo dye.
CH104472A (en) Process for the preparation of a new pyrazolone derivative.
CH131254A (en) Process for the production of a new azo dye.
CH150173A (en) Process for the preparation of a diazoamino compound.
CH180595A (en) Process for the preparation of 2-butoxy-5-acetylaminopyridine.
CH194344A (en) Process for the preparation of a polyazo dye.
CH183328A (en) Process for the preparation of 1-phenyl-2,3-dimethyl-4-cyclohexenylamino-5-pyrazolone.
CH145860A (en) Process for the production of a metal-containing dye.
CH192041A (en) Process for the production of a new azo dye.
CH137101A (en) Process for producing a solid diazoazo compound.
CH95238A (en) Process for the preparation of a dye of the pyrazolone series.
CH189799A (en) Process for the preparation of an insoluble azo dye.
CH104914A (en) Process for the preparation of a new azo dye.
CH138229A (en) Process for the production of a new azo dye.
CH180408A (en) Process for the preparation of a substantive azo dye.
CH217973A (en) Process for the preparation of an azo dye.
CH170768A (en) Process for the preparation of a substantive copper-containing azo dye.