DE697731C - Process for the preparation of 7-iodo-5-chloro-8-oxyquinoline - Google Patents

Process for the preparation of 7-iodo-5-chloro-8-oxyquinoline

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Publication number
DE697731C
DE697731C DE1938R0103982 DER0103982D DE697731C DE 697731 C DE697731 C DE 697731C DE 1938R0103982 DE1938R0103982 DE 1938R0103982 DE R0103982 D DER0103982 D DE R0103982D DE 697731 C DE697731 C DE 697731C
Authority
DE
Germany
Prior art keywords
oxyquinoline
chloro
parts
iodo
iodine
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
DE1938R0103982
Other languages
German (de)
Inventor
Dr Friedrich Boedecker
Dr Lebrecht Cassel
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.)
Honeywell Riedel de Haen AG
Original Assignee
JD Riedel E de Haen 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 JD Riedel E de Haen AG filed Critical JD Riedel E de Haen AG
Priority to DE1938R0103982 priority Critical patent/DE697731C/en
Application granted granted Critical
Publication of DE697731C publication Critical patent/DE697731C/en
Expired legal-status Critical Current

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  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Quinoline Compounds (AREA)

Description

Verfahren zur Herstellung von 7-Jod-5-chlor-8-oxychinolin Es ist bekannt, daß man 7-Jod-5-chlor-8-oxychinolin erhält,'Wenn man 5-Chlor-8-oxychinolin mit jodierenden Mitteln behandelt (Patentschrift 117 767). Dieses Verfahren ist aber umständlich und liefert unbefriedigende Ausbeuten, weil man von dem nicht leicht zu.-gänglichen 5-Chlor-8-oxychin#olin, ausgehen muß.Process for the preparation of 7-iodo-5-chloro-8-oxyquinoline It is known that 7-iodo-5-chloro-8-oxyquinoline is obtained if 5-chloro-8-oxyquinoline is treated with iodine agents (patent specification 117 767). However, this process is laborious and gives unsatisfactory yields because one has to start from the 5-chloro-8-oxyquinoline, which is not readily available.

Es wurde gefunden, daß man unter Umgehung des 5-Chlor-8-oxycliinolins einfacher und mit besserer Ausbeute 7-Jod-5-chloir-8-oxychinolin erhält, wenn man auf 8-Oxychinolin Lösungen von jodtrichlorid einwir--ken läßt.It has been found that by bypassing the 5-chloro-8-oxycliinoline 7-iodine-5-chloir-8-oxyquinoline is obtained more easily and with better yield if one Let it act on 8-oxyquinoline solutions of iodine trichloride.

Die Umsetzung kann sowohl mierganischen indifferenten Lösungsmitteln oder Lösungsmittelgemischen, wie Chloroform, Tetrachlorkohlenstoff, Eisessig, als auch in anorganischen Lösungsmitteln, -z. B. wäßriger konzentrierter Salzsäure, vorgenommen werden, wobei man das Jodtrichlorid zweckmäßig,#rst im Lösungsmittel durch Einwirkung von Chlor auf elementares Jod herstellt. Beispiel i In eine Lösung von I--7,7Teilen Jod in 8o Teilen Tetrachlorkohlenstoff wird Chlor bis zur Gewichtszunahme von IO,7»Teilei-i,ei#ngeleitet. Die dabei entstehende Lösung von JoÜtrichlo'nid wird dann unter Kühlung mit einer Lösung von i4,5Teilen 8-Oxychinolin in 8oTeilen Tetrachlorkohlenstoff vermischt und mehrere Stunden 'bei Raumtemperatur sich selbst überlas:sen. Dabei fällt das Hydrochlorid des 7-Jod-5-chlor-8--oxydünolins aus, das abgesaugt und durch Behandlung mit 8oo Teilen Wasser in die freie Base Übexführt wird. Nach dem Auswaschen mit Wasser und Trocknen erhält man 29 Teile (9--%'d-er theoretisch zu erwartendefi Menge) 7-Jod-5-chlor-8-oxychinolin vom F. 178'.The implementation can be both organic, inert solvents or mixed solvents such as chloroform, carbon tetrachloride, glacial acetic acid, as also in inorganic solvents, -z. B. aqueous concentrated hydrochloric acid, be carried out, the iodine trichloride expediently, # rst in the solvent produced by the action of chlorine on elemental iodine. Example i In a solution From 1 to 7.7 parts of iodine in 80 parts of carbon tetrachloride becomes chlorine up to the point of weight gain from IO, 7 »Teilei-i, ei # introduced. The resulting solution of JoÜtrichlo'nid is then cooled with a solution of 14.5 parts 8-oxyquinoline in 80 parts Carbon tetrachloride mixed and self-contained for several hours' at room temperature leave: sen. The hydrochloride of 7-iodo-5-chloro-8-oxydünolin precipitates, which is filtered off with suction and converted into the free base by treatment with 800 parts of water will. After washing with water and drying, 29 parts (9% d-er theoretically expected amount) of 7-iodo-5-chloro-8-oxyquinoline of F. 178 '.

Beispiel z In- eine Lösung von 12,7 Teilen Jod *in ioo Teilen Eisessig werden 10,7 Teile Chlor eingeleitet und die entstandene Lösung unter Kühlung zu 14,5 Teilen 8-Oxycliinoa ge- geben. Nach mehrstündigem Stehen bei Zimmertemp-eratur wird das Hydrochlorid wie in Beispiel i aufgearbeitet; man erhält 29 Teile (95% der Theorie) 7-Jod-5-chlor-8-oxychino,-lin vom F. 179'. Beispiel 3 12,7T,eilejodwer-denmit5oTeüen33%iger Salzsäure übergossen. Beim Einleiten von 10,7 Teilen Chlor entsteht eine rotgelbe, klare Lösung, die mit einer Lösung von 14,5 Teilen 8-Oxychinelin in iooTeilen 330i'oig#er Salzsäure vereinigt wird. Das ausfallende Hydrochlorid wird, wie im Beispiel i beschrieben ist, aufgearbeitet, wobei man 29 Teile, d. h. eine Ausbeute von 95% der Theorie, an reinem 7-Jod-5-chlor-8-oxychinolin (F. 178') erhält.For example, for Germany, a solution of 12.7 parts of iodine in * ioo parts of glacial acetic acid 10.7 parts of chlorine are introduced and enter the resulting solution under cooling to 14.5 parts of 8-Oxycliinoa overall. After standing for several hours at room temperature, the hydrochloride is worked up as in Example i; 29 parts (95% of theory) of 7-iodo-5-chloro-8-oxychino, -lin of F. 179 'are obtained. Example 3 12.7T, 50 parts of 33% hydrochloric acid are poured over iodine. When 10.7 parts of chlorine are introduced, a red-yellow, clear solution is formed which is combined with a solution of 14.5 parts of 8-oxyquineline in 100 parts of 330,000 hydrochloric acid. The precipitated hydrochloride is, as described in Example i, worked up, 29 parts, d. H. a yield of 95% of theory of pure 7-iodo-5-chloro-8-oxyquinoline (F. 178 ') is obtained.

Claims (1)

PATFNTANSPRUCH: Verfahren zur Herstellung von 7-Jod-5-chlor-8-oxychin,olin, dadurch gekennzeichnet, daß man 8-Oxvchinolin mit Lösungen von jodtrichlorid behandelt.PATENT CLAIM: Process for the production of 7-iodine-5-chloro-8-oxyquin, oline, characterized in that 8-oxyquinoline is treated with solutions of iodine trichloride.
DE1938R0103982 1938-12-08 1938-12-08 Process for the preparation of 7-iodo-5-chloro-8-oxyquinoline Expired DE697731C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1938R0103982 DE697731C (en) 1938-12-08 1938-12-08 Process for the preparation of 7-iodo-5-chloro-8-oxyquinoline

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1938R0103982 DE697731C (en) 1938-12-08 1938-12-08 Process for the preparation of 7-iodo-5-chloro-8-oxyquinoline

Publications (1)

Publication Number Publication Date
DE697731C true DE697731C (en) 1940-10-21

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ID=7420964

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1938R0103982 Expired DE697731C (en) 1938-12-08 1938-12-08 Process for the preparation of 7-iodo-5-chloro-8-oxyquinoline

Country Status (1)

Country Link
DE (1) DE697731C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE852853C (en) * 1942-06-04 1952-10-20 Geigy Ag J R Process for the preparation of halo-8-oxychinaldines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE852853C (en) * 1942-06-04 1952-10-20 Geigy Ag J R Process for the preparation of halo-8-oxychinaldines

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