DE613172C - Process for the preparation of condensation products of the oxazole series - Google Patents

Process for the preparation of condensation products of the oxazole series

Info

Publication number
DE613172C
DE613172C DEI48209D DEI0048209D DE613172C DE 613172 C DE613172 C DE 613172C DE I48209 D DEI48209 D DE I48209D DE I0048209 D DEI0048209 D DE I0048209D DE 613172 C DE613172 C DE 613172C
Authority
DE
Germany
Prior art keywords
condensation products
preparation
oxazole series
series
oxazole
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
Application number
DEI48209D
Other languages
German (de)
Inventor
Dr Hans Schindhelm
Dr Otto Bayer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
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
Priority to DEI48209D priority Critical patent/DE613172C/en
Application granted granted Critical
Publication of DE613172C publication Critical patent/DE613172C/en
Expired legal-status Critical Current

Links

Description

Verfahren zur Darstellung von Kondensationsprodukten der Oxazolreihe Durch das Hauptpatent 6o9 o25 wird ein Verfahren zur Darstellung von neuen Kondensationsprodukten der Thiazolreihe geschützt, das darin besteht, daß man 2-Halogenarylenthiazolverbindungen mit Alkalisulfiten bzw. arylsulfinsauren Salzen umsetzt.Process for the preparation of condensation products of the oxazole series The main patent 6o9 o25 provides a process for the preparation of new condensation products the thiazole series, which consists in the fact that one 2-haloarylenethiazole compounds with alkali sulfites or aryl sulfinic acid salts.

In weiterer Ausbildung des Verfahrens wurde gefunden, daß, soweit es sich um die Umsetzung mit Alkalisulfiten handelt, auch Halogenverbindungen der Zusammensetzung geeignet sind und zu bisher unbekannten Kondensationsprodukten vom Typus von C-Sulfonsäuren führen, ohne daß überraschenderweise die Umsetzung in anderer Richtung verläuft.In a further development of the process it was found that, as far as the reaction with alkali metal sulfites is concerned, halogen compounds of the composition are also used are suitable and lead to previously unknown condensation products of the C-sulfonic acid type without, surprisingly, the reaction proceeding in the other direction.

Da die als Ausgangsstoffe dienenden 2-Halogenarylenoxazole, wie aus der Literatur bekannt, nach verschiedenen Verfahren leicht herzustellen sind, sind auch die nach vorliegendem Verfahren in glatter Umsetzung daraus erhältlichen Kondensationsprodukte leicht zugänglich. Sie sollen als Zwischenkörper zur Herstellung von Farbstoffen und Heilmitteln Verwendung finden. Beispiel 154 kg 2-Chlorbenzoxazol (Kp. 2o4 bis 2o5°) läßt man in eine neutrale Natriumsulfitlösung, hergestellt aus 480 kg Natriumbisulfitlösung 38' Be, 360 1 Wasser und 229 kg Natronlauge (spez. Gewicht I,43), einlaufen.Since the 2-haloaryleneoxazoles used as starting materials, as known from the literature, can be easily prepared by various processes, the condensation products obtainable therefrom in smooth conversion by the present process are also easily accessible. They should be used as intermediate bodies for the production of dyes and medicines. Example 154 kg of 2-chlorobenzoxazole (bp. 204 to 205 °) are allowed to run into a neutral sodium sulfite solution prepared from 480 kg of sodium bisulfite solution 38 ' Be, 360 1 of water and 229 kg of sodium hydroxide solution (specific weight 1.43).

Nach 12stündigem Kochen unter Rückfluß bei gutem Rühren ist die Umsetzung beendet, was sich durch das Verschwinden des Öles bemerkbar macht.After refluxing for 12 hours with thorough stirring, the reaction is complete ends, which is noticeable by the disappearance of the oil.

Beim Erkalten kristallisiert die Benzoxazola-sulfonsäure in Form ihres Natriumsalzes in derben farblosen Nadeln aus.When cooling down, the benzoxazol sulfonic acid crystallizes in its form Sodium salt in coarse, colorless needles.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von Kondensationsprodukten der Oxazolreihe, dadurch gekennzeichnet, daß man in Abänderung des Verfahrens des Patents 609025 hier 2-Halogenverbindungen der allgemeinen Formel mit Alkalisulfiten umsetzt.PATENT CLAIM: Process for the preparation of condensation products of the oxazole series, characterized in that, in a modification of the process of patent 609025, here 2-halogen compounds of the general formula with alkali sulfites.
DEI48209D 1933-10-28 1933-10-28 Process for the preparation of condensation products of the oxazole series Expired DE613172C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI48209D DE613172C (en) 1933-10-28 1933-10-28 Process for the preparation of condensation products of the oxazole series

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI48209D DE613172C (en) 1933-10-28 1933-10-28 Process for the preparation of condensation products of the oxazole series

Publications (1)

Publication Number Publication Date
DE613172C true DE613172C (en) 1935-05-13

Family

ID=7192197

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI48209D Expired DE613172C (en) 1933-10-28 1933-10-28 Process for the preparation of condensation products of the oxazole series

Country Status (1)

Country Link
DE (1) DE613172C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284294A (en) * 1964-04-29 1966-11-08 Bayer Ag Methods and compositions for treating soil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284294A (en) * 1964-04-29 1966-11-08 Bayer Ag Methods and compositions for treating soil

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