CH139365A - Process for the preparation of a descendant of the pyrazolanthrone. - Google Patents

Process for the preparation of a descendant of the pyrazolanthrone.

Info

Publication number
CH139365A
CH139365A CH139365DA CH139365A CH 139365 A CH139365 A CH 139365A CH 139365D A CH139365D A CH 139365DA CH 139365 A CH139365 A CH 139365A
Authority
CH
Switzerland
Prior art keywords
pyrazolanthrone
preparation
descendant
benzanthrone
dinitrobenzanthrone
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 CH139365A publication Critical patent/CH139365A/en

Links

Landscapes

  • Nitrogen Condensed Heterocyclic Rings (AREA)

Description

  

  Verfahren zur Darstellung eines Abkömmlings des     Pyrazolanthrons.       Gegenstand der vorliegenden Erfindung  ist ein Verfahren zur Darstellung eines Kon  densationsproduktes der     Benzanthronreihe,     welches dadurch gekennzeichnet ist, dass man  ein     Alkalisalz    des     Pyrazolanthrons    mit     Di-          nitrobenzanthron    vom Schmelzpunkt<B>268'</B>  umsetzt, welches durch Nitrieren von Benz  anthron mittelst Salpetersäure von 470     B6     bei<B>5-100</B> C gewonnen wird.  



  <I>Beispiel:</I>  Ein inniges Gemenge von '22 Gewichts  teilen     Pyrazolanthron    und 8 Gewichtsteilen  trockener Pottasche wird in 500 Gewichts  teilen Nitrobenzol eine Stunde lang bei 170 bis  180   C verrührt, bis das "rote     Kaliumsalz     des     Pyrazolanthrons    gebildet und das ent  standene Wasser verdampft ist. Dann wer  den 32 Gewichtsteile     Dinitrobenzanthron    vom  Schmelzpunkt 268   (erhältlich durch Nitrieren  von     Benzanthron    mittelst Salpetersäure von  47       B6    bei 5-10   C) eingetragen, und das    Gemisch 1-2 Stunden bei 2001 nachgerührt.  Die rote Farbe des Kalisalzes verschwindet  rasch.

   Die Lösung nimmt eine intensive       braungelbe    Farbe an. Beim Erkalten scheidet  sich das gebildete     Nitrobenzanthronylpyrazol-          anthron    aus. Nach dem Verdünnen mit Sprit  wird filtriert, mit Sprit und heissem Wasser  ausgewaschen und getrocknet. Das Roh  produkt bildet ein orangegelbes Pulver, das  bei<B>350-3600</B> schmilzt. Durch nochmaliges       Umkristallisieren    aus Nitrobenzol erhält man  orangerote Kristalle, die gegen 400   schmel  zen. Konzentrierte Schwefelsäure löst das  Produkt mit     gelbstichroter    Farbe. Das End  produkt soll als Ausgangsmaterial zur Dar  stellung von Farbstoffen verwendet werden.



  Process for the preparation of a descendant of the pyrazolanthrone. The present invention relates to a process for the preparation of a condensation product of the benzanthrone series, which is characterized in that an alkali salt of pyrazole anthrone is reacted with dinitrobenzanthrone with a melting point of 268 ', which is obtained by nitrating benzanthrone Nitric acid of 470 B6 at <B> 5-100 </B> C is obtained.



  <I> Example: </I> An intimate mixture of 22 parts by weight of pyrazolanthrone and 8 parts by weight of dry potash is stirred in 500 parts by weight of nitrobenzene for one hour at 170 to 180 C until the "red potassium salt of pyrazolanthrone is formed and the ent Then 32 parts by weight of dinitrobenzanthrone with a melting point of 268 (obtainable by nitrating benzanthrone with nitric acid of 47 B6 at 5-10 C) are added, and the mixture is stirred for 1-2 hours at 2001. The red color of the potassium salt disappears quickly.

   The solution takes on an intense brownish yellow color. When it cools down, the nitrobenzanthronylpyrazole anthrone formed is deposited. After diluting with fuel, it is filtered, washed with fuel and hot water and dried. The raw product forms an orange-yellow powder that melts at <B> 350-3600 </B>. Another recrystallization from nitrobenzene gives orange-red crystals that melt against 400. Concentrated sulfuric acid dissolves the product with a yellowish red color. The end product should be used as a starting material for the production of dyes.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Konden sationsproduktes der Benzanthronreihe, da durch gekennzeichnet, dass man ein Alkalisalz des Pyrazolanthrons mit Dinitrobenzanthron vom Schmelzpunkt 268 umsetzt, welches durch Nitrieren von Benzanthron mittelst Salpetersäure von 47' B6 bei<B>5-10'</B> ge wonnen wird. Das Endprodukt soll als Aus gangsmaterial zur Darstellung von Farbstoffen verwendet werden. PATENT CLAIM: A process for the preparation of a condensation product of the benzanthrone series, characterized in that an alkali salt of pyrazole anthrone is reacted with dinitrobenzanthrone with a melting point of 268, which is obtained by nitrating benzanthrone with nitric acid of 47 'B6 at <B> 5-10' </ B > is won. The end product should be used as starting material for the representation of dyes. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man Pyrazolanthron- kalium mit Dinitrobenzanthron vom Schmelz punkt<B>2680</B> umsetzt. SUBSTANTIAL CLAIM: Process according to patent claim, characterized in that pyrazolanthrone potassium is reacted with dinitrobenzanthrone with a melting point of <B> 2680 </B>.
CH139365D 1927-07-18 1928-07-03 Process for the preparation of a descendant of the pyrazolanthrone. CH139365A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE139365X 1927-07-18
CH133473T 1927-10-22

Publications (1)

Publication Number Publication Date
CH139365A true CH139365A (en) 1930-04-15

Family

ID=25712080

Family Applications (1)

Application Number Title Priority Date Filing Date
CH139365D CH139365A (en) 1927-07-18 1928-07-03 Process for the preparation of a descendant of the pyrazolanthrone.

Country Status (1)

Country Link
CH (1) CH139365A (en)

Similar Documents

Publication Publication Date Title
CH139365A (en) Process for the preparation of a descendant of the pyrazolanthrone.
DE500520C (en) Process for the preparation of nitrogen-containing condensation products of the benzanthrone series
DE497715C (en) Process for the preparation of halogen substitution products of benzobenzanthrone carboxylic acids
DE550706C (en) Process for the preparation of benzanthrones substituted in the benzene nucleus
DE571037C (en) Process for the preparation of alkali-soluble derivatives of benzanthrone
DE557665C (en) Process for the preparation of nitrogen-containing fragments of aromatic compounds
DE580088C (en) Process for the production of Kuepen dyes
DE492320C (en) Process for the preparation of nitrogen-containing condensation products of the aromatic series
DE638601C (en) Process for the preparation of anthraquinone dyes
DE513046C (en) Process for the preparation of Kuepen dyes of the 1,2-benzanthraquinone series
AT156581B (en) Process for the preparation of substituted anthraquinones and the corresponding aroylbenzoic acids.
DE539331C (en) Process for the preparation of 3-oxythionaphthene-7-carboxylic acid chlorides or carboxylic acids
AT44177B (en) Process for the preparation of nitrogen-containing anthraquinone derivatives.
DE488607C (en) Process for the preparation of new derivatives of benzanthrone
DE525331C (en) Process for the production of new Kuepen dyes
DE457121C (en) Process for the preparation of condensation products from benzobenzanthrone carboxylic acids
CH134363A (en) Process for the preparation of 1,3-diamino-2-hydroxyanthraquinone.
CH127033A (en) Process for the preparation of Bz-1-phenylbenzanthrone.
CH155119A (en) Process for the preparation of dimethoxy-3.4.8.9-dibenzpyrenquinone-5.10.
CH139363A (en) Process for the preparation of a descendant of the pyrazolanthrone.
CH137941A (en) Process for the preparation of a descendant of the pyrazolanthrone.
CH132798A (en) Process for the preparation of 6-bromo-Bz1-methoxybenzanthrone.
CH145046A (en) Process for the preparation of a vat dye of the anthraquinone series.
CH150179A (en) Process for the preparation of an aminoaryl-cyclohexylamine compound.
CH150180A (en) Process for the preparation of an aminoaryl-cyclohexylamine compound.