DE728036C - Process for the preparation of 3,5-substituted 2,4-dioxooxazolidines - Google Patents
Process for the preparation of 3,5-substituted 2,4-dioxooxazolidinesInfo
- Publication number
- DE728036C DE728036C DEC56447D DEC0056447D DE728036C DE 728036 C DE728036 C DE 728036C DE C56447 D DEC56447 D DE C56447D DE C0056447 D DEC0056447 D DE C0056447D DE 728036 C DE728036 C DE 728036C
- Authority
- DE
- Germany
- Prior art keywords
- dioxooxazolidines
- parts
- substituted
- dioxooxazolidine
- preparation
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D263/00—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
- C07D263/02—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings
- C07D263/30—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D263/34—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D263/44—Two oxygen atoms
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Description
Verfahren zur Herstellung von 3,5-substituierten 2, 4-Dioxooxazolidinen Es ist bekannt, in 3-Stellung sowie in S-und 5-Stellung substituierte 2, 4-Dioxooxazolidine herzustellen, vgl. Beilstein, Handbuch der organischen Chemie, Band XXVII, SS. 232 und 249. Hierbei ging man von Verbindungen aus, die den 3-Substituenten bereits vor erfolgtem Ringschluß enthielten. Wir haben nun gefunden, daß man den 3-Substituenten ,auch in die bereits fertig gebildeten, in 5-Stellung substituierten 2, 4-Dioxooxazolidine einführen kann, indem man letztere in alkalischer Lösung mit Alhylierungs- oder Aralkylierungsmitteln behandelt. Da die 2, 4-Dioxooxazolidine bekanntlich unter dem Einfuß von Alkali leicht einer Aufspaltung des Ringes unterliegen, so war es nicht ohne weiteres vorauszusehen, daß die Einführung eines Substituenten in 3-Stellung auf obige Weise gelingen würde. Die Verfahrensprodukte sollen als Heilmittel oder als Zwischenprodukte zur Herstellung solcher Verwendung finden. Beispiel i Eine Lösung von 4 Teilen 5-Phenyl-2, 4-dioxooxazolidin und 2o Raumteilen 5 %iger Natronlauge wird unter Kühlung mit 3 Teilen Dimethylsulfat verrührt, bis ein, weißer Kristallbrei entstanden ist. Nach dem Absaugen, Waschen mit Wasser und Trocknen erhält man das 3-Methyl-5-phenyl-2, 4-dioxooxazolidin, das nach dem Umkristallisieren aus Benzol glänzende Schuppen vom F. 1i3° bildet. Beispiel 2 Eine Lösung von 2o Teilen 5, 5-Phenyläthyl - 2, 4 - dioxooxazolidin in go Raumteilen 5%iger INTatronlauge wird unter gelegentlichem Kühlen mit 1,3 Teilen Dimethylsulfat längere Zeit geschüttelt, bis ein pH von 7 erreicht ist. Das hierbei abgeschiedene 01 wird mit Äther aufgenommen, die ätherische Lösüng mit Wasser neutral gewaschen und der Äther verdampft. Es hinterbleibt ein farbloses Öl, welches seiner Zusammensetzung .nach als 3-Methyl-5, 5-phenyläthyl-2, 4-dioxooxazolidin anzusehen ist.Process for the preparation of 3,5-substituted 2,4-dioxooxazolidines It is known to prepare 2,4-dioxooxazolidines substituted in the 3-position and in the S- and 5-position, cf. Pp. 232 and 249. This was based on compounds which already contained the 3-substituent before the ring closure occurred. We have now found that the 3-substituent can also be introduced into the 2,4-dioxooxazolidines already formed and substituted in the 5-position by treating the latter in alkaline solution with alkylating or aralkylating agents. Since the 2,4-dioxooxazolidines are known to be easily subject to splitting of the ring under the influence of alkali, it was not readily foreseeable that the introduction of a substituent in the 3-position would succeed in the above manner. The products of the process are intended to be used as medicinal products or as intermediate products for the production of such use. Example i A solution of 4 parts of 5-phenyl-2,4-dioxooxazolidine and 20 parts by volume of 5% strength sodium hydroxide solution is stirred with 3 parts of dimethyl sulfate, while cooling, until a white crystal paste has formed. After filtering off with suction, washing with water and drying, 3-methyl-5-phenyl-2,4-dioxooxazolidine is obtained, which, after recrystallization from benzene, forms shiny flakes with a melting point of 1.13 °. EXAMPLE 2 A solution of 20 parts of 5,5-phenylethyl-2,4-dioxooxazolidine in 20 parts by volume of 5% sodium hydroxide solution is shaken with 1.3 parts of dimethyl sulfate for a long time, with occasional cooling, until a pH of 7 is reached. The precipitated 01 is taken up with ether, the ethereal solution washed neutral with water and the ether evaporates. A colorless oil remains, which, according to its composition, is to be regarded as 3-methyl-5, 5-phenylethyl-2, 4-dioxooxazolidine.
Beispiel '3 Eine Lösung von 35 Teilen 5-Phenyl-2, 4-dioxooxazolidin in t3o Raumteilen Wasser und .1o Raumteilen 2o-volumprozentiger Natronlauge wird mit qo Teilen Allyljodid eine Stunde lang unter Rühren am Rückflußkühler gekocht. Die beim Abkühlest unter Rühren erhaltene körnige Masse wird nach dem Absaugen und Waschen mit Wasser aus verdünntem Spiritus umkristallisiert. Das so dargestellte 3 Allyl-5-phenyl-z, .1-dioxooxazolidin bildet farblose Schuppen vom F. 65°. Beispiel Verwendet man in Beispiel3 an Stelle des Allyljodids 25 Teile Benzylchlorid, so erhält man bei sonst gleicher Arbeitsweiso des 3-Benzyl-5-phenyl-2, 4-dioxooxazolidin. das nach dem Umkristallisieren aus Alkohol glänzende Schuppen von F. t t S bildet.Example 3 A solution of 35 parts of 5-phenyl-2,4-dioxooxazolidine in t3o parts by volume water and .1o parts by volume 2o percent by volume sodium hydroxide solution boiled with qo parts of allyl iodide for one hour with stirring on the reflux condenser. The granular mass obtained during the cooling test with stirring is after suction and Washing with water recrystallized from diluted alcohol. The one shown in this way 3 Allyl-5-phenyl-z, .1-dioxooxazolidine forms colorless flakes with a temperature of 65 °. example If, in Example 3, 25 parts of benzyl chloride are used instead of the allyl iodide, so 3-benzyl-5-phenyl-2,4-dioxooxazolidine is obtained with otherwise the same procedure. which forms shiny flakes of F. t t S after recrystallization from alcohol.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEC56447D DE728036C (en) | 1941-04-20 | 1941-04-20 | Process for the preparation of 3,5-substituted 2,4-dioxooxazolidines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEC56447D DE728036C (en) | 1941-04-20 | 1941-04-20 | Process for the preparation of 3,5-substituted 2,4-dioxooxazolidines |
Publications (1)
Publication Number | Publication Date |
---|---|
DE728036C true DE728036C (en) | 1942-11-18 |
Family
ID=7028325
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEC56447D Expired DE728036C (en) | 1941-04-20 | 1941-04-20 | Process for the preparation of 3,5-substituted 2,4-dioxooxazolidines |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE728036C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2559011A (en) * | 1951-07-03 | Manufacture of n-allyl derivatives | ||
DE1147583B (en) * | 1959-07-01 | 1963-04-25 | Nippon Shinyaku Co Ltd | Process for the preparation of 2, 4-dioxo-dihydro-1, 3-benzoxazinyl- (3) -acetic acid dialkylamides |
-
1941
- 1941-04-20 DE DEC56447D patent/DE728036C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2559011A (en) * | 1951-07-03 | Manufacture of n-allyl derivatives | ||
DE1147583B (en) * | 1959-07-01 | 1963-04-25 | Nippon Shinyaku Co Ltd | Process for the preparation of 2, 4-dioxo-dihydro-1, 3-benzoxazinyl- (3) -acetic acid dialkylamides |
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