CH168922A - Process for the preparation of a 1-amino-10-anthrone. - Google Patents

Process for the preparation of a 1-amino-10-anthrone.

Info

Publication number
CH168922A
CH168922A CH168922DA CH168922A CH 168922 A CH168922 A CH 168922A CH 168922D A CH168922D A CH 168922DA CH 168922 A CH168922 A CH 168922A
Authority
CH
Switzerland
Prior art keywords
amino
methyl
anthrone
yellow
preparation
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 CH168922A publication Critical patent/CH168922A/en

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

Description

  

  Verfahren zur Darstellung eines     1-Amino-10-anthrons.       Gegenstand des vorliegenden Zusatzpa  tentes ist ein Verfahren zur Darstellung eines       1-Amino-10-anthrons,    welches dadurch ge  kennzeichnet ist, dass man     2'-Amino-4'-me-          thyl-2-benzylbenzoesäure    mit einem sauren  Kondensationsmittel behandelt.  



  <I>Beispiel:</I>  80 Gewichtsteile     2'-Amino-4'-methyl-2-          benzylbenzoesäiire    werden in 800     Gewichts-          teilen        Schwefelsäure        (96        %)        gelöst        und        eine     Viertelstunde bei<B>50-550</B> erhitzt. Das Re  aktionsprodukt wird in Eiswasser gegossen,  der gelbgrüne     Niedersehlag    abgesaugt und  neutral gewaschen.  



  Das so erhältliche     1-Amino-3-methyl-10-          anthron,    das zur Darstellung von Farbstoffen  verwendet werden soll, kristallisiert aus     Di-          chlorbenzol    in gelbbraunen Nadeln vom  Schmelzpunkt<B>196-1970</B> aus. Es löst sich  hellgelb mit schwacher grüner Fluoreszenz  in konzentrierter Schwefelsäure und gelb in  Natronlauge. Aus seiner alkalischen Lösung  scheidet sich beim Stehen an der Luft oder  auf Zusatz von Wasserstoffsuperoxyd 1-Amino-    3 -     methyl        -anthrachinon    vom Schmelzpunkt  193 0 ab.



  Process for the preparation of a 1-amino-10-anthrone. The subject of the present additional patent is a process for the preparation of a 1-amino-10-anthrone, which is characterized in that 2'-amino-4'-methyl-2-benzylbenzoic acid is treated with an acidic condensation agent.



  <I> Example: </I> 80 parts by weight of 2'-amino-4'-methyl-2-benzylbenzoic acid are dissolved in 800 parts by weight of sulfuric acid (96%) and a quarter of an hour at <B> 50-550 </B> heated. The reaction product is poured into ice water, the yellow-green lower layer is suctioned off and washed neutral.



  The 1-amino-3-methyl-10-anthrone obtainable in this way, which is to be used to represent dyes, crystallizes from dichlorobenzene in yellow-brown needles with a melting point <B> 196-1970 </B>. It dissolves pale yellow with weak green fluorescence in concentrated sulfuric acid and yellow in sodium hydroxide solution. From its alkaline solution, 1-amino-3-methyl-anthraquinone with a melting point of 193 ° separates on standing in air or on addition of hydrogen peroxide.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines 1-Amino- 10-anthrons, dadurch gekennzeichnet, dass man 2'-Amino-4'-methyl- 2 -benzylbenzoesäure mit einem sauren Kondensationsmittel behandelt. Das so erhältliche 1-Amino-3-methyl-10- anthron kristallisiert aus Dichlorbenzol in gelb-braunen Nadeln vom Schmelzpunkt <B>196-1970</B> aus. Es löst sich hellgelb mit schwacher grüner Fluoreszenz in konzen trierter Schwefelsäure und gelb in Natron lauge. Claim: Process for the preparation of a 1-amino-10-anthrone, characterized in that 2'-amino-4'-methyl-2-benzylbenzoic acid is treated with an acidic condensation agent. The 1-amino-3-methyl-10-anthrone obtainable in this way crystallizes from dichlorobenzene in yellow-brown needles with a melting point of <B> 196-1970 </B>. It dissolves in light yellow with weak green fluorescence in concentrated sulfuric acid and yellow in sodium hydroxide. Aus seiner alkalischen Lösung scheidet sich beim Stehen an der Luft oder auf Zu satz von Wasserstoffsuperoxyd 1-Amino-3-me- thyl-anthrachinon vom Schmelzpunkt 193 0 ab. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man als Kondensations- mittel Schwefelsäure von 96 % bei etwa 50-"05 0 C auf 2'-Amino-4'-methyl-2-benzyl- benzoesäure einwirken lässt. From its alkaline solution, 1-amino-3-methyl-anthraquinone with a melting point of 193 ° separates out on standing in the air or with the addition of hydrogen peroxide. SUBSTANTIAL CLAIM: Process according to patent claim, characterized in that the condensation agent is sulfuric acid of 96% at about 50- "05 0 C on 2'-amino-4'-methyl-2-benzylbenzoic acid.
CH168922D 1931-07-17 1932-07-07 Process for the preparation of a 1-amino-10-anthrone. CH168922A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE168922X 1931-07-17
CH162737T 1932-07-07

Publications (1)

Publication Number Publication Date
CH168922A true CH168922A (en) 1934-04-30

Family

ID=25717634

Family Applications (1)

Application Number Title Priority Date Filing Date
CH168922D CH168922A (en) 1931-07-17 1932-07-07 Process for the preparation of a 1-amino-10-anthrone.

Country Status (1)

Country Link
CH (1) CH168922A (en)

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