CH205773A - Process for the preparation of 7-methyl-3-oxydiphenylene oxide. - Google Patents

Process for the preparation of 7-methyl-3-oxydiphenylene oxide.

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Publication number
CH205773A
CH205773A CH205773DA CH205773A CH 205773 A CH205773 A CH 205773A CH 205773D A CH205773D A CH 205773DA CH 205773 A CH205773 A CH 205773A
Authority
CH
Switzerland
Prior art keywords
methyl
oxydiphenylene
oxide
preparation
weight
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 CH205773A publication Critical patent/CH205773A/en

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

Description

  

  Verfahren zur Herstellung von     7-lyiethyl-3-ogydiphenylenogyd.       Gegenstand des vorliegender, Zusatzpa  tentes ist ein Verfahren zur Herstellung von       7-Metyl-3-oxydiphenylenoxyd,    welches da  durch gekennzeichnet ist, dass man     4'-Methyl-          2'-halogen-2,5-dioxydiphenyl    mit einem alka  lisch wirkenden Mittel bei höherer Tempe  ratur behandelt.  



  Die so erhaltene neue Verbindung stellt  ein wertvolles Zwischenprodukt     zur-Herstel-          lung    von     Farbstoffen    dar.  



  <I>Beispiele:</I>  1. 160 Gewichtsteile     4'-Methyl-2'-chlor-          2,5-dioxydiphenyl    vom F. 1480 C (erhältlich  durch Umsetzung der     Diazoverbindung    des       4-Methyl-2-chlor-l-aminobetizols    mit     Benzo-          chinon    und Reduktion des erhaltenen 4'  Methyl-2'-chlor-phenylbenzochinons) werden  mit 200 Gewichtsteilen kristallisiertem Na  triumacetat, 10 Gewichtsteilen     Natriumhydro-          sulfit    und 200 Gewichtsteilen     Ätzkali    bei  70-100       C    geschmolzen,

   und in die Schmelze    werden unter dauernder Steigerung der Tem  peratur 400 Gewichtsteile     Ätzkali    eingetra  gen. Bei 180   C setzt eine lebhafte Reaktion  ein, und die Temperatur der Schmelze  steigt bis auf 210-2200     C;    man erhitzt  dann noch kurze Zeit auf 240-250   C zur  Beendigung der Reaktion. Die Schmelze wird  in Wasser eingetragen und kalt angesäuert.  Man erhält 140 Gewichtsteile Rohprodukt  vom F. 146-147<B>0</B> C.  



  Das erhaltene     7-Methyl-3-oxydiphenylen-          oxyd    ist in verdünnten     Alkalien    farblos lös  lich und kristallisiert aus     Toluol    in farblosen  Nadeln vom F. 147-148   C.  



  2. Ersetzt man im Beispiel 1 die 160  Gewichtsteile     4'-Methyl-2'-chlor-2,5-dioxydi-          phenyl    durch 190 Gewichtsteile     4'-Methyl-          2'-brom-2,5-diogydiphenyl    vom     F.148-150     C  (erhältlich durch Reduktion des durch Um  setzung von     diazotiertem        4-Methyl-2-brom-          1-aminobenzol    mit     Benzochinon    entstehenden       4'-Methyl-2'-brom-pbenyl-benzochinons    vom      F. 89-90   C), so erhält man gleichfalls das  im Beispiel 1 beschriebene     7-Methyl-3-oxy-          diphenylenoxyd    vom F.

   147-1480 C.



  Process for the preparation of 7-lyiethyl-3-ogydiphenylenogyd. The subject of the present, Zusatzpa tentes is a process for the production of 7-methyl-3-oxydiphenylene oxide, which is characterized by the fact that 4'-methyl-2'-halogen-2,5-dioxydiphenyl with an alkali agent treated at a higher temperature.



  The new compound obtained in this way is a valuable intermediate for the production of dyes.



  <I> Examples: </I> 1. 160 parts by weight of 4'-methyl-2'-chloro-2,5-dioxydiphenyl with a melting point of 1480 C (obtainable by reacting the diazo compound of 4-methyl-2-chloro-1- aminobetizols with benzoquinone and reduction of the 4 'methyl-2'-chlorophenylbenzoquinone) are melted with 200 parts by weight of crystallized sodium acetate, 10 parts by weight of sodium hydrosulfite and 200 parts by weight of caustic potash at 70-100 C,

   and 400 parts by weight of caustic potash are introduced into the melt with a constant increase in temperature. A vigorous reaction sets in at 180 C and the temperature of the melt rises to 210-2200 C; the mixture is then heated to 240-250 ° C. for a short time to end the reaction. The melt is poured into water and cold acidified. 140 parts by weight of crude product of F. 146-147 C.



  The 7-methyl-3-oxydiphenylene oxide obtained is colorlessly soluble in dilute alkalis and crystallizes from toluene in colorless needles with a temperature of 147-148 C.



  2. If in Example 1 the 160 parts by weight of 4'-methyl-2'-chloro-2,5-dioxydiphenyl are replaced by 190 parts by weight of 4'-methyl-2'-bromo-2,5-diogydiphenyl from F.148- 150 ° C. (obtainable by reducing the 4'-methyl-2'-bromo-pbenyl-benzoquinone with a melting point of 89-90 ° C. formed by the reaction of diazotized 4-methyl-2-bromo-1-aminobenzene with benzoquinone) the 7-methyl-3-oxydiphenylene oxide described in Example 1 from F.

   147-1480 C.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von 7-Methyl- 3-oxy-diphenylenoxyd, dadurch gekennzeieh- net, dass man 4'-Methyl-2'-halogen-2,5-dioxy- diphenyl mit einem alkalisch wirkenden Mittel bei höherer Temperatur behandelt. Die so erhaltene Verbindung ist in ver dünnten Alkalien farblos löslich und kristal lisiert aus Toluol in farblosen Nadeln vom F. 147-148<B>0</B> C. PATENT CLAIM: Process for the production of 7-methyl-3-oxy-diphenylene oxide, characterized in that 4'-methyl-2'-halogen-2,5-dioxy-diphenyl is treated with an alkaline agent at a higher temperature. The compound obtained in this way is colorlessly soluble in dilute alkalis and crystallizes from toluene in colorless needles of F. 147-148 <B> 0 </B> C.
CH205773D 1936-01-22 1937-01-14 Process for the preparation of 7-methyl-3-oxydiphenylene oxide. CH205773A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE205773X 1936-01-22
CH199182T 1937-01-14

Publications (1)

Publication Number Publication Date
CH205773A true CH205773A (en) 1939-06-30

Family

ID=25723197

Family Applications (1)

Application Number Title Priority Date Filing Date
CH205773D CH205773A (en) 1936-01-22 1937-01-14 Process for the preparation of 7-methyl-3-oxydiphenylene oxide.

Country Status (1)

Country Link
CH (1) CH205773A (en)

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