DE951868C - Process for the preparation of new thiazolidones (4) - Google Patents

Process for the preparation of new thiazolidones (4)

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Publication number
DE951868C
DE951868C DESCH14575A DESC014575A DE951868C DE 951868 C DE951868 C DE 951868C DE SCH14575 A DESCH14575 A DE SCH14575A DE SC014575 A DESC014575 A DE SC014575A DE 951868 C DE951868 C DE 951868C
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DE
Germany
Prior art keywords
vol
component
acid
new
thiazolidones
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
DESCH14575A
Other languages
German (de)
Inventor
Dr Klaus Pirner
Dr Hans Priewe
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.)
Bayer Pharma AG
Original Assignee
Schering 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
Priority to DESCH14492A priority Critical patent/DE946140C/en
Application filed by Schering AG filed Critical Schering AG
Priority to DESCH14575A priority patent/DE951868C/en
Application granted granted Critical
Publication of DE951868C publication Critical patent/DE951868C/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D277/00Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
    • C07D277/02Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
    • C07D277/08Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
    • C07D277/12Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member 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
    • C07D277/14Oxygen atoms

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Thiazole And Isothizaole Compounds (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Plural Heterocyclic Compounds (AREA)

Description

Verfahren zur Herstellung neuer Thiazolidone-(4) Gegenstand des Hauptpatents 946.140 ist die Herstellung von N-Oxythiazolidonen-(4).Process for the preparation of new thiazolidones- (4) the subject of the main patent 946.140 is the manufacture of N-Oxythiazolidonen- (4).

In- weiterer Ausbildung des Erfindungsgedankens des Hauptpatents wurde nun gefunden, daB man in entsprechender Weise auch die bisher . ebenfalls unbekannten Derivate der N-Aminothiazolsidorie-(4) . erhalten kann, wenn man a-Mercaptocarbonsäuren einschließlich ihrer funktionellen Derivate, wie Ester, Thioester, Amitde oder Salze, auf Aralkylidenhydrazine, wie Hydrazone oder Azine, an Stelle der im Hauptpatent genannten Oxime zur Einwirkung bringt. Die Reaktion verläuft, am Beispiel .der Umsetzung der a-Mercaptoessigsäure mit BenzaIphenylhydrazon erläutert, im Endeffekt nach folgendem Schema Die Umsetzung wird unter den im Hauptpatent genannten Zeit- und Temperaturbedingungen derartig durchgeführt, daß die Hydrazon-bzw. die Azinkomponente und die Mercaptocarbonsäurekomponente entweder direkt oder verdünnt mit den im Hauptpatent genannten Lösungsmitteln, --zweckmäßig-unter Zusatz der im Hauptpatent genannten reaktionsbeschleunigenden Katalysatoren, vermischt werden.In a further development of the inventive concept of the main patent, it has now been found that the previously. also unknown derivatives of N-aminothiazolesidory- (4). can be obtained if a-mercaptocarboxylic acids, including their functional derivatives, such as esters, thioesters, amides or salts, are brought into action on aralkylidene hydrazines, such as hydrazones or azines, instead of the oximes mentioned in the main patent. The reaction proceeds, as explained using the example of the reaction of α-mercaptoacetic acid with BenzaIphenylhydrazone, in the end according to the following scheme The reaction is carried out under the time and temperature conditions mentioned in the main patent in such a way that the hydrazone or. the azine component and the mercaptocarboxylic acid component either directly or diluted with the solvents mentioned in the main patent - expediently - with the addition of the reaction-accelerating catalysts mentioned in the main patent.

Die Verfahrensprodukte des Zusatzpatents sollen als Arzneimittel oder als Ausgangsstoffe für die Herstellung solcher verwendet werden.The process products of the additional patent are said to be medicinal products or be used as starting materials for the production of such.

Es ist zwar bekannt, 2, 3-disubstituierte Thiazolidon-(4)-abkömm-linge dadurch herzustellen, daß man a-Mercaptocarbonsäuren mit funktionellen Stickstoffderivaten von Aldehyden umsetzt (vgl. Helvetica Chimnca Acta, Bd. 3o [19q.7], S..1329ff.; Journal of the A-merican Cheinical Society, Bd. 69 [1947] S. 291i; Bd.70 [1948], S.3436; Bd.71 [I949] S. 3105 und S. 3354 ferner -die USA.-Patentschriften 2520 178,2520179 und 2 647 9o5). An Hand- dieser bekannten Umsetzungen konnte der Fachmann aber keineswegs mit Sicherheit vorhersagen, daß die ringschließende Kondensation bei der Verwendung von Aralkylidenhydrazinen, wie Hydrazonen oderAzinen,an Stelle der obengenannten funktionellen Stickstoffderivate von Aldemyden zwangläufig so vollkommen analog verlaufen müsse, wie es erfindungsgemäß der Fall ist. Es bestand immerhin die Möglichleeit, daß die erfindungsgemäß verwendeten Ara:llkylidenhydrazine, welche außer der gleichfalls vorhandenen -N = CH-Gruppierung arü Stickstoff an Stelle eines Wasserstoffatoms oder eines Kohlenwasserstoffrestes die zusätzlich vorhandenen Gruppen - NHR' bzw. -N = CH # R' tragen, beim Ringschluß unter Mitbeteiligung der letztgenannten Gruppen reagieren würden oder daß der Ringschluß unter dem Einfluß der zusätzlich vorhandenen Gruppen - wenigstens unter analogen Bedingungen - überhaupt ausblieb. Darüber hinaus war wenigstens theoretisch noch eine ganze Reihe der verschiedensten Ringschlußreaktiönen denkbar, und es ist anzunehmen, daß gerade diese Unübersichtlichkeit des voraussichtlichen Reaktionsverlaufs die Fachleute bisher von der praktischen Durchführung und Überprüfung der erfindungsgemäßen Umsetzungen abgehalten hat.It is known that 2,3-disubstituted thiazolidone (4) derivatives by preparing a-mercaptocarboxylic acids with functional nitrogen derivatives of aldehydes (cf. Helvetica Chimnca Acta, Vol. 3o [19q.7], pp. 1329ff .; Journal of the American Chemical Society, vol. 69 [1947] p. 291i; Vol. 70 [1948], P.3436; Vol. 71 [1949] p. 3105 and p. 3354 also-the USA patents 2520 178,2520179 and 2 647 9o5). However, the person skilled in the art could in no way be able to use these known reactions predict with certainty that the ring-closing condensation in use of aralkylidene hydrazines such as hydrazones or azines in place of the above functional nitrogen derivatives of Aldemyden inevitably so completely analogous must run, as is the case according to the invention. At least there was the possibility that the Ara: alkylidene hydrazines used according to the invention, which apart from the likewise existing -N = CH grouping arü nitrogen instead of a hydrogen atom or a hydrocarbon radical, the additional groups - NHR 'or -N = CH # R ', when the ring closes with the participation of the latter groups would react or that the ring closure under the influence of the additionally existing Groups - at least under analogous conditions - did not appear at all. Furthermore was at least theoretically a whole series of the most varied ring-closing reactions conceivable, and it is to be assumed that it is precisely this confusion of the probable The course of the reaction, the experts so far from the practical implementation and review has held the reactions according to the invention.

Durch' die erstmalige Übertragung der oben zitierten Umsetzungen auf die neuen Reaktionspartner wurde unter voraufgegangener Überwindung in der Fachwelt bestehender Hemmungen eine neue Verbindungsgruppe erschlossen, auf deren technische Brauchbarkeit weiter oben bereits hingewiesen worden ist.By 'the first transfer of the above-cited implementations to the new reaction partner has been overcome in the professional world existing inhibitions opened up a new connection group, on their technical Usefulness has already been pointed out above.

Auch in der Arbeitsweise, beispielsweise der bevorzugten Verwendung stark saurer Katalysatoren, weist das vorliegende Verfahren als solches gegenüber dem Stand der Technik zusätzliche Eigentümlichkeiten auf.Also in the way of working, for example the preferred use strongly acidic catalysts, the present process opposes as such the prior art has additional peculiarities.

Beispiele I. 2-Phenyl-3-(phenylamino)-thiazolidon-(4) 4,9 g Benzalphenylhydrazon werden in io ccm Tetrahydrofuran gelöst, mit 2,3 g a-Mercaptoessigsäure und o,97 g 84%iger Phosphorsäure homogen gernn.scht. Nach 5tägigem Stehen bei Raumtemperatur werden die gebildeten Kristalle abgesaugt, mit Tetrahydrofuran geyvaschen und aus Alkohol umkristallisiert. Es werden 4,5 g (entsprechend 67% der Theorie) 2-Phenyl-3-(phenylaminö)-thia-" zoliKdon-(4) vom F.= 165 bis I6,7° erhalten.Examples I. 2-Phenyl-3- (phenylamino) -thiazolidone- (4) 4.9 g of benzalphenyl hydrazone are dissolved in 10 cc of tetrahydrofuran and mixed homogeneously with 2.3 g of α-mercaptoacetic acid and 0.97 g of 84% phosphoric acid. After standing for 5 days at room temperature, the crystals formed are filtered off with suction, washed with tetrahydrofuran and recrystallized from alcohol. There are obtained 4.5 g (corresponding to 67% of theory) of 2-phenyl-3- (phenylaminö) -thia- "zoliKdon- (4), mp = 165 ° I6,7.

2. 2-Phenyl-3-(benzalamino)-thi.azolidon-(4) :2o,8 g Benzalazin werden in 4o ccm Tetrahydrofuran gelöst .reit 9,2 g a-Mercaptoessigsäure und 3,9 g 840/0iger Phosphorsäure homogen gemischt. Nach 3tägigem Stehen werden die gebildeten Kristalle abgesaugt, mit Alkohol gewaschen und aus Dioxan umkristallisiert.. Es werden 2o,6 g (entsprechend 730/0 der Theorie) 2-Phenyl-3-(benzalamino)-thiazölidon-(4) vom F. = 155 bis 157' erhalten.2. 2-Phenyl-3- (benzalamino) -thi.azolidon- (4) : 20.8 g of benzalazine are dissolved in 40 cc of tetrahydrofuran. 9.2 g of α-mercaptoacetic acid and 3.9 g of 840/0 phosphoric acid are mixed homogeneously. After standing for 3 days, the crystals formed are filtered off with suction, washed with alcohol and recrystallized from dioxane. 2o.6 g (corresponding to 730/0 of theory) of 2-phenyl-3- (benzalamino) -thiazölidon- (4) from F. = 155 to 157 'obtained.

3. 2 - (4' - Oxy - 3' - methoxyphenyl) - 3 - (4"-Oxy-3"-met'hoxybenzalamino)-thiazolidon=(4). 9 g 4 4@-Dioxy-3, 3'-dimethoxybenzalazin, gelöst in 5oo ocm Tetrahy4rofuran.'werden mit 5,5 g a-Mercaptoessigsäure und 1,2 g 84°/oiger Phosphorsäure homogen gemischt. Nach iotägigem Stehen werden die abgeschiedenen Kristalle abgesaugt, mit Tetrahydröfuran gewaschen, in verdünnter Natronlauge gelöst, filtriert und mit verdünnter Salzsäure gefällt. Es -werden -8,2 g (entsprechend 73 °/o der Theorie) 2 - (4' - Oxy-3'-methoxyphenyl)-3-(4"-oxy-3" - methoxybenzalamino) - thiazolidon - (4) vom F. = 235 bis 238° ,erhalten.3. 2 - (4 '- Oxy - 3' - methoxyphenyl) - 3 - (4 "-Oxy-3"-met'hoxybenzalamino) -thiazolidone = (4). 9 g of 4 4 @ -Dioxy-3, 3'-dimethoxybenzalazine, dissolved in 500 ocm tetrahydrofuran are mixed homogeneously with 5.5 g of α-mercaptoacetic acid and 1.2 g of 84% phosphoric acid. After standing for 10 days, the deposited crystals are filtered off with suction, washed with tetrahydrofuran, dissolved in dilute sodium hydroxide solution, filtered and precipitated with dilute hydrochloric acid. There are -8.2 g (corresponding to 73% of theory) 2 - (4 '- oxy-3'-methoxyphenyl) -3- (4 "-oxy-3" - methoxybenzalamino) - thiazolidone - (4) from the F. = 235 to 238 °.

Claims (5)

PATENTANSPRÜCHE: i. Weitere Ausbildung des Verfahrens zur Herstellung neuer Thiazölldone - (4) gemäß Patent 946 140, dadurch gekennzeichnet, daß man a-Mercaptocarbonsäuren einschließlich ihrer funktionellen Derivate, wie Ester, Thioester, Amide oder Salze, auf Aralkylidenhydrazine, wie Hydrazone oder Azine, gegebenenfalls in Gegenwart von sauren oder basischen Katalysatoren, zur Einwirkung bringt. PATENT CLAIMS: i. Further training of the manufacturing process new Thiazölldone - (4) according to Patent 946 140, characterized in that α-mercaptocarboxylic acids including their functional derivatives, such as esters, thioesters, amides or salts, on aralkylidene hydrazines, such as hydrazones or azines, optionally in the presence of acidic or basic catalysts to act. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß Phenylhydrazone als Hydrazonkomponente verwendet werden. 2. Procedure according to Claim i, characterized in that phenylhydrazones are used as the hydrazone component will. 3. Verfahren nach Anspruch i, dadurch gekennzeichnet, @daß Benzalazine als Azinkomponente verwendet werden. 3. The method according to claim i, characterized in that @ benzalazines as Azine component can be used. 4. Verfahren nach Anspruch i bis 3, dadurch gekennzeichnet, daß als a-Mercaptocarbonsäurekomponente die a-Mercaptoessigsäure verwendet wird. 4. The method according to claim i to 3, characterized in that that the α-mercaptoacetic acid is used as the α-mercaptocarboxylic acid component. 5. Verfahren nach Anspruch i bis q., dadurch gekennzeichnet, daß als Katalysator Phosphorsäure verwendet wird. In Betracht gezogene Druckschriften: Helvetica Chimica Acta, Bd. 39 [I947), S. 13:29 ff-.; Journal of the American Chemical Society, Bd. 69 [19471, S. 2911, Bd.70 [19481, S.3436 Bd. 71 [19491, S. 3105, -S. 3354 USA.-Patentschriften Nr. 2 52O 178, 2 520 179, 26479o5.5. The method according to claim i to q., Characterized in that phosphoric acid is used as the catalyst. Contemplated publications:. Helvetica Chimica Acta, Vol 39 [I947), pp 13:29 ff .; Journal of the American Chemical Society, Vol. 69 [19471, p 291 1, Bd.70 [19481, S.3436 Vol. 71 [19491, S. 3105, -S. 3354 USA. Patent Nos. 2 178 52o, 2,520,179, 26479o5.
DESCH14575A 1954-02-02 1954-02-11 Process for the preparation of new thiazolidones (4) Expired DE951868C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DESCH14492A DE946140C (en) 1954-02-02 1954-02-02 Process for the preparation of new thiazolidones (4)
DESCH14575A DE951868C (en) 1954-02-02 1954-02-11 Process for the preparation of new thiazolidones (4)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DESCH14492A DE946140C (en) 1954-02-02 1954-02-02 Process for the preparation of new thiazolidones (4)
DESCH14575A DE951868C (en) 1954-02-02 1954-02-11 Process for the preparation of new thiazolidones (4)

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DE951868C true DE951868C (en) 1956-11-08

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DESCH14575A Expired DE951868C (en) 1954-02-02 1954-02-11 Process for the preparation of new thiazolidones (4)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2520179A (en) * 1949-02-02 1950-08-29 Sterling Drug Inc 4-thiazolidones and a method for preparation thereof
US2520178A (en) * 1948-03-19 1950-08-29 Sterling Drug Inc 2, 3-diaryl-4-thiazolidones and their preparation
US2647905A (en) * 1951-09-05 1953-08-04 Sterling Drug Inc Preparation of 2-substituted-3-ureido-4-thiazolidones, 1-dioxide derivatives thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2520178A (en) * 1948-03-19 1950-08-29 Sterling Drug Inc 2, 3-diaryl-4-thiazolidones and their preparation
US2520179A (en) * 1949-02-02 1950-08-29 Sterling Drug Inc 4-thiazolidones and a method for preparation thereof
US2647905A (en) * 1951-09-05 1953-08-04 Sterling Drug Inc Preparation of 2-substituted-3-ureido-4-thiazolidones, 1-dioxide derivatives thereof

Also Published As

Publication number Publication date
DE946140C (en) 1956-07-26

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