CH205773A - Process for the preparation of 7-methyl-3-oxydiphenylene oxide. - Google Patents
Process for the preparation of 7-methyl-3-oxydiphenylene oxide.Info
- 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
Links
Landscapes
- 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)
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) |
-
1937
- 1937-01-14 CH CH205773D patent/CH205773A/en unknown
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