DE1058060B - Process for the preparation of substituted ªÏ-morpholinoalkyl ethers of salicylamide with analgesic activity - Google Patents

Process for the preparation of substituted ªÏ-morpholinoalkyl ethers of salicylamide with analgesic activity

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Publication number
DE1058060B
DE1058060B DER19635A DER0019635A DE1058060B DE 1058060 B DE1058060 B DE 1058060B DE R19635 A DER19635 A DE R19635A DE R0019635 A DER0019635 A DE R0019635A DE 1058060 B DE1058060 B DE 1058060B
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DE
Germany
Prior art keywords
salicylamide
substituted
preparation
morpholinoalkyl
ethers
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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.)
Pending
Application number
DER19635A
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German (de)
Inventor
Dr Harm Siemer
Dr Adolf Doppstadt
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.)
Ravensberg GmbH Chemische Fabrik
Original Assignee
Ravensberg GmbH Chemische Fabrik
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Application filed by Ravensberg GmbH Chemische Fabrik filed Critical Ravensberg GmbH Chemische Fabrik
Priority to DER19635A priority Critical patent/DE1058060B/en
Publication of DE1058060B publication Critical patent/DE1058060B/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D265/00Heterocyclic compounds containing six-membered rings having one nitrogen atom and one oxygen atom as the only ring hetero atoms
    • C07D265/281,4-Oxazines; Hydrogenated 1,4-oxazines
    • C07D265/301,4-Oxazines; Hydrogenated 1,4-oxazines not condensed with other rings

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)

Description

Verfahren zur Herstellung von analgetisch wirksamen, substituierten co-Morpholinoalkyläthern des Salicylamids Gegenstand der Erfindung ist ein Verfahren zur Herstellung von analgetisch wirksamen, substituierten co-Morpholinoalkyläthern des Salicylamids der allgemeinen Formel worin R einen Alkylrest mit 1 bis 5 C-Atomen in gerader oder verzweigter Kette und x eine ganze Zähl zwischen 1 und 5 bedeutet, wobei der (CH,)" -Rest ebenfalls eine gerade oder verzweigte Kette sein kann.Process for the preparation of analgesically effective, substituted co-morpholinoalkyl ethers of salicylamide The invention relates to a process for the preparation of analgesic, substituted co-morpholinoalkyl ethers of salicylamide of the general formula where R is an alkyl radical having 1 to 5 carbon atoms in a straight or branched chain and x is a whole number between 1 and 5, where the (CH,) "radical can also be a straight or branched chain.

Die Verfahrensprodukte werden auf einfachem Wege und in vorzüglichen Ausbeuten gewonnen, indem man substituierte a-Halogen-(i)-Morpholino-alkane, wie z. B. a-Chlor-ß-(2-phenyl-3-methyl-morpholino)-äthan, einer alkoholischen Lösung der Na-Verbindung des Salicylamids zufügt und 2 Stunden unter Rückfluß kocht. Die gewünschten Reaktionsprodukte fallen bereits während des Abkühlens aus und werden mit Wasser gewaschen, um das entstandene Kochsalz zu entfernen. Aus den Basen lassen sich die Salze nach an Sich bekannten Methoden gewinnen.The products of the process are simple and excellent Yields obtained by using substituted a-halo (i) -morpholino-alkanes, such as z. B. a-chloro-ß- (2-phenyl-3-methyl-morpholino) -ethane, an alcoholic solution the Na compound of the salicylamide is added and refluxed for 2 hours. the desired reaction products precipitate and become even during cooling washed with water to remove the resulting common salt. Let out of the bases the salts are obtained by methods known per se.

Setzt man an Stelle der a-Halogen-o-)-morpholino-a.lkanbasen deren Salze, beispielsweise ihre Hydrochloride, ein, so muß zusätzlich für die Neutralisation der Salze Sorge getragen werden, z. B. durch Zugabe einer äquivalenten Menge Alkali oder Verwendung einer entsprechenden Natriumalkoholatlösung. Diese Morpholino-alkylhalogenidbasen, insbesondere ihre Salze, stellt man durch Halogenierung der Morpholinoalkohole in guten Ausbeuten her. Zur näheren Erläuterung sei anschließend die Darstellung vom a-Chlor-ß-(2-phenyl-3-methyl-morpholino)-äthanhvdrochlorid beschrieben: 192 g a-Oxy-ß-(2-phenyl-3-methyl-morpholino)-äthan (Schmp. 66 bis 67°C), welches durch Anlagerung von Äthylenoxyd an 2-Phenyl-3-methyl-morpholin erhalten wurde, löst man in 600 ml abs. Benzol und versetzt unter Erwärmen mit 48 ml Thionylchlorid. Das sich abscheidende Hydrochlorid (Schmp. 218°C unter Zersetzung) wird auf der rutsche gesammelt und kann direkt weiterumgesetzt bzw. als Ausgangssubstanz zur Herstellung der Base verwandt werden.If the a-halogen-o -) - morpholino-a.lkanbasen is replaced by their Salts, for example their hydrochlorides, must also be used for neutralization the salts are taken care of, e.g. B. by adding an equivalent amount of alkali or use of an appropriate sodium alcoholate solution. These morpholino-alkyl halide bases, in particular their salts, are made by halogenation of the morpholino alcohols in good yields. For a more detailed explanation, the illustration from Described α-chloro-β- (2-phenyl-3-methyl-morpholino) -ethane hydrochloride: 192 g of α-oxy-β- (2-phenyl-3-methyl-morpholino) -ethane (Mp. 66 to 67 ° C), which by addition of ethylene oxide to 2-phenyl-3-methyl-morpholine was obtained, is dissolved in 600 ml of abs. Benzene and treated with 48 with heating ml of thionyl chloride. The hydrochloride which separates out (melting point 218 ° C with decomposition) is collected on the slide and can be used directly or as a starting substance can be used to produce the base.

Die beanspruchten neuartigen Verbindungen, insbesondere in Form ihrer Salze, stellen wertvolle Arzneimittel dar, welche sich gegenüber dem Salicylamid oder anderen bekannten Derivaten hiervon und auch beispielsweise gegenüber dem Phenacetin durch eine überlegene analgetische Wirkung auszeichnen. Darübm hinaus weisen sie infolge ihrer geringen Toxizität eine überaus günstige, große therapeutische Breite auf. Dieser wertvolle Befund war auch völlig überraschend, weil nach Ausführungen im J. Pharmacol. Exper. Therap., 108, 450 (1953), erwartet werden mußte, daß nach Substitution des phenolischen H-Atoms des Salicylsäureamids durch einen basischen Rest die Toxizität mehr als verdoppelt und damit der therapeutische Index vermindert würde.The claimed novel compounds, especially in the form of their Salts are valuable drugs that are different from salicylamide or other known derivatives thereof and also, for example, with respect to phenacetin distinguished by a superior analgesic effect. In addition, they show due to their low toxicity, an extremely favorable, wide therapeutic range on. This valuable finding was also completely surprising, because according to statements in J. Pharmacol. Exper. Therap., 108, 450 (1953), it had to be expected that after Substitution of the phenolic H atom of the salicylic acid amide by a basic one The rest more than doubles the toxicity and thus reduces the therapeutic index would.

Die in der nachstehenden Tabelle aufgeführten Werte für die mittlere therapeutische Dosis AD" wurde nach der Methode von W o 1 f f- H ar d y mittels dosierten Wärmeeinsatzes durch Punktlichtlampe und Brennlupe ermittelt. Thera- Präparat LDr>O AD SO peutdcxer Index LDSO/ADso Acetylsalicylsäure ... .. . . . .. 500 350 1,5 Salicylamid ............... 600 175 3 2-(2-Propenoxy)-benzamidl 250 60 4 2-n-Propoxybenzamid2 ..... 290 75 4 2-[ß-(ß'-Diäthylamino- äthoxy)-äthoxy]- benzymid-H C13 . . . . . . . . . . 600 120 5 Hydrochlorid des ß-(2-Phenyl- 3-methyl-morpholino)- äthyläthers des Salicylamids 900 100 9 1 USA.-Patentschrift 2 694 088. 2 Britische Patentschrift 726 786. 3 Deutsche Auslegeschrift 1006 850. Aus der vorliegenden Tabelle geht klar hervor, daß das Hydrochlorid des ß-(2-Phenyl-3-methyl-morpholino)- Lthyläthers des Salicylamids den zum Vergleich gestellten Lnderen Verbindungen auf Grund seiner geringsten Coxizität, dem größten analgetischen Effekt und dem veitaus günstigsten therapeutischen Index eindeutig iberlegen ist.The values listed in the table below for the mean therapeutic dose AD " were determined according to the method of W o 1 f f-Hardy by means of metered use of heat using a point light lamp and a magnifying glass. Thera- Preparation LDr> O AD SO peutdcxer index LDSO / ADso Acetylsalicylic acid ... ... . . .. 500 350 1.5 Salicylamide ............... 600 175 3 2- (2-propenoxy) benzamide 250 60 4 2-n-propoxybenzamide2 ..... 290 75 4 2- [ß- (ß'-diethylamino- ethoxy) -ethoxy] - benzymide-H C13. . . . . . . . . . 600 120 5 Ss- (2-phenyl- 3-methyl-morpholino) - Salicylamide ethyl ether 900 100 9 1 U.S. Patent 2,694,088. 2 British Patent 726,786. 3 German interpretation document 1006 850. The table clearly shows that the hydrochloride of ß- (2-phenyl-3-methyl-morpholino) -ethyl ether of salicylamide compared with the other compounds because of its lowest coxicity, the greatest analgesic effect and by far the most favorable therapeutic Index is clearly superior.

Beispiele 1. Zu einer Natriummethylatlösung, enthaltend 7,8 g Jatrium in 100 ml Methanol, fügt man unter Rühren eine Lösung von 23,3 g Salicylamid in 60 ml Methanol und i0 g a-Chlor-ß-(2-phenyl-3-methyl-morpholino)-äthan-hyirochlorid. Nach Zugabe von 0,5 g Kaliumjodid erwärmt nan und kocht 2 Stunden unter Rückfluß. Die Hauptnenge des ß-(2-Phenyl-3-methyl-morpholino)-äthyläthers les Salicylamids fällt als Base bereits beim Abkühlen aus. Durch Einengen der Reaktionslösung werden noch ,veitere Basenanteile gewonnen. Die vereinigten Verfah--ensprodukte werden auf der Nutsche bis zur Kochsalz-'reiheit mit Wasser gewaschen und aus einem Choroform-4ceton-Gemisch umkristallisiert. Schmp. der Base 141 bis 142°C; Ausbeute 89°/o. Schmp. des aus Aceton-Äther unnkristallisierten Hydrochlorids 242°C.Examples 1. To a sodium methylate solution containing 7.8 g of sodium in 100 ml of methanol, a solution of 23.3 g of salicylamide in 60 ml of methanol and 10 g of α-chloro-ß- (2-phenyl-3-methyl-morpholino) -ethane hyirochloride. After adding 0.5 g of potassium iodide, the mixture is heated and refluxed for 2 hours. The main amount of ß- (2-phenyl-3-methyl-morpholino) -äthers les salicylamids precipitates as a base on cooling. By concentrating the reaction solution still, further base fractions gained. The combined process products become Washed on the suction filter with water until it is free from sodium chloride and made from a chloroform-4cetone mixture recrystallized. Mp. Of the base 141 to 142 ° C; Yield 89%. Of the Acetone-ether not crystallized hydrochloride 242 ° C.

2. Unter Verwendung von 3,9 g Natrium in 60 ml Methanol und 40 g a-Chlor-ß-(2-phenyl-3-methyl-mor-:)holino)-äthanbase, gelöst in 60 ml Methanol, wird bei analogen Reaktionsbedingungen gemäß Beispiel 1 verfahren.2. Using 3.9 g of sodium in 60 ml of methanol and 40 g of a-chloro-ß- (2-phenyl-3-methyl-mor - :) holino) -ethane base, dissolved in 60 ml of methanol, under analogous reaction conditions according to Example 1 procedure.

Die Herstellung der Ausgangssubstanzen wird nicht beansprucht.The production of the starting substances is not claimed.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von analgetisch wirksamen, substituierten co-Morpholinoalkyläthern des Salicylamids der allgemeinen Formel worin R einen Alkylrest mit 1 bis 5 C-Atomen in gerader oder verzweigter Kette und x eine ganze Zahl zwischen 1 und 5 bedeutet, wobei der (CH,),-Rest ebenfalls eine gerade oder verzweigte Kette sein kann, dadurch gekennzeichnet, daß man substituierte a-Halogen-co-morpholino-alkane in geeigneten Lösungsmitteln, insbesondere in Alkoholen und bei Zusatz geringer Mengen Kaliumjodid, mit einem Metallsalz des Salicylamids unter Erwärmen in an sich bekannter Weise umsetzt und gegebenenfalls die Umsetzungsprodukte in an sich bekannter Weise in ihre Salze umwandelt. In Betracht gezogene Druckschriften: Britische Patentschriften Nr. 754 789 und 710 511; Journ. of Pharmacy a Pharmacol, 4, (1952), S. 593/594 und S. 872 bis 878.PATENT CLAIM: Process for the preparation of substituted co-morpholinoalkyl ethers of the salicylamide of the general formula with analgesic activity wherein R is an alkyl radical with 1 to 5 carbon atoms in a straight or branched chain and x is an integer between 1 and 5, where the (CH,), radical can also be a straight or branched chain, characterized in that one substituted a-halo-co-morpholino-alkanes in suitable solvents, especially in alcohols and with the addition of small amounts of potassium iodide, with a metal salt of salicylamide with heating in a known manner and optionally converts the reaction products in a known manner into their salts . Documents considered: British Patent Nos. 754 789 and 710 511; Journ. of Pharmacy a Pharmacol, 4, (1952), pp. 593/594 and pp. 872 to 878.
DER19635A 1956-09-12 1956-09-12 Process for the preparation of substituted ªÏ-morpholinoalkyl ethers of salicylamide with analgesic activity Pending DE1058060B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10577361B2 (en) 2015-10-13 2020-03-03 Indivior Uk Limited Dopamine D3 receptor antagonists having a morpholine moiety

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB710511A (en) * 1950-09-29 1954-06-16 Abbott Lab Improvements in or relating to aryl ethers of morpholino-alkanols and methods for the production thereof
GB754789A (en) * 1953-08-15 1956-08-15 Eprova Ltd New derivatives of salicylic acid and process for the production thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB710511A (en) * 1950-09-29 1954-06-16 Abbott Lab Improvements in or relating to aryl ethers of morpholino-alkanols and methods for the production thereof
GB754789A (en) * 1953-08-15 1956-08-15 Eprova Ltd New derivatives of salicylic acid and process for the production thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10577361B2 (en) 2015-10-13 2020-03-03 Indivior Uk Limited Dopamine D3 receptor antagonists having a morpholine moiety
EP3362446B1 (en) * 2015-10-13 2020-12-02 Indivior UK Limited Dopamine d3 receptor antagonists having a morpholine moiety

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