CH288889A - Process for preparing a derivative of 1,2,4-triazine. - Google Patents

Process for preparing a derivative of 1,2,4-triazine.

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Publication number
CH288889A
CH288889A CH288889DA CH288889A CH 288889 A CH288889 A CH 288889A CH 288889D A CH288889D A CH 288889DA CH 288889 A CH288889 A CH 288889A
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CH
Switzerland
Prior art keywords
phenyl
triazine
derivative
methyl
preparing
Prior art date
Application number
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German (de)
Inventor
Ag J R Geigy
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Ag J R Geigy
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 Ag J R Geigy filed Critical Ag J R Geigy
Publication of CH288889A publication Critical patent/CH288889A/en

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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D253/00Heterocyclic compounds containing six-membered rings having three nitrogen atoms as the only ring hetero atoms, not provided for by group C07D251/00
    • C07D253/02Heterocyclic compounds containing six-membered rings having three nitrogen atoms as the only ring hetero atoms, not provided for by group C07D251/00 not condensed with other rings
    • C07D253/061,2,4-Triazines
    • C07D253/0651,2,4-Triazines having three double bonds between ring members or between ring members and non-ring members
    • C07D253/071,2,4-Triazines having 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
    • C07D253/075Two hetero atoms, in positions 3 and 5

Description

Verfahren zur Herstellung eines Derivates des 1,2,4-Triazins. Derivate des 1,2,4-Triazins der allgemeinen Formeln worin R einen substituierten Arylrest, X1 Wasserstoff Oder einen Alkyl-, Arallryl-, Aryl-, heterocyclischen oder Carbacylrest, und X2 und X3 Wasserstoff, Alkyl-, Aralkyl- Aryl- oder heterocyclische Reste bedeuten, sind bis- her nicht bekannt geworden. Wie gefunden Process for preparing a derivative of 1,2,4-triazine. Derivatives of 1,2,4-triazine of the general formulas wherein R is a substituted aryl radical, X1 is hydrogen or an alkyl, aralkyl, aryl, heterocyclic or carbacyl radical, and X2 and X3 are hydrogen, alkyl, aralkyl, aryl or heterocyclic remainders have not become known up to now. As found

wurde, kônnen sie als Zwischenprodukte oder als Arzneimittel dienen. . they can serve as intermediates or as medicines. .

Man kann die neuen Verbindungen syn- thetisieren, indem man Thiosemicarbazone von a-Keto-sâuren der allgemeinen Formeln One can synthesize the new compounds by preparing thiosemicarbazones from a-keto acids of the general formulas

bzw. deren reaktionsfâhige funktionnelle Deri- vate mit ringschlieeenden Mitteln und hierauf gegebenenfalls zur nachtrâglichen Einführung der Reste Xi und X3 noch mit Alkylierungs-, Aralkylierungs- oder Acylierungsmitteln be- handelt. Als ringschlienende Mittel kommen zum Beispiel Alkalien, wie Lbsungen von Na- triumcarbonat, Kaliumcarbonat oder Natrium- hydroxyd, in Betracht; in der Mercapto- gruppe substituiertë Verbindtuigen gehen- beim Erhitzen in Alkohol ohne weitere Zu- sâtze in die gewünscliten Triazinderivate iiber. Als Alkylierungs- imd Aralkylierungsmittel eignen sich reaktionsfâhige Ester von alipha- tischen und araliphatischen AlkohoIen in Ge- genwart von Alkalien. Beispielsweise seien Methyljodid, Dimethylsulfat, Toluolsulfon- sâuremethylester, Athylbromid, DiâthyIsulfat, or their reactive functional derivatives are treated with ring-closing agents and then optionally treated with alkylating, aralkylating or acylating agents for the subsequent introduction of the radicals Xi and X3. Examples of suitable ring-closing agents are alkalis, such as solutions of sodium carbonate, potassium carbonate or sodium hydroxide; Compounds substituted in the mercapto group are converted into the desired triazine derivatives without further additives on heating in alcohol. Reactive esters of aliphatic and araliphatic alcohols in the presence of alkalis are suitable as alkylating and aralkylating agents. Examples include methyl iodide, dimethyl sulfate, methyl toluenesulfonate, ethyl bromide, diethyl sulfate,

5,thyl-schwefelsaures Natrium, Propylchlorid, Isopropylbromid, Allylbromid und Benzyl chlorid genannt. 5, Sodium ethylsulphate, propyl chloride, isopropyl bromide, allyl bromide and benzyl chloride called.

Als Acylierungsmittel kommen zum Bei spiel Acetylchlorid, Acetanhydrid, Keten imd Benzoylchlorid und deren Homologe und Sub stitutionsprodukte, im weiteren zum Beispiel auch Chlorameisensâureester und Dialkyl carbamins5,urechloride in Betracht. Examples of suitable acylating agents are acetyl chloride, acetic anhydride, ketene and benzoyl chloride and their homologues and substitution products, as well as, for example, chloroformic esters and dialkylcarbamic acid chlorides.

Die genannten Mittel reagieren zuerst mit der Mercaptogruppe, sofern diese frei ist, in zweiter Linie wird das Wasserstoffatom in. Stellung 2 substituiert. The agents mentioned react first with the mercapto group, if this is free, and secondly, the hydrogen atom in the 2-position is substituted.

Die als Ausgangsprodidite ben5tigten Thio semicarbazone von a-Keto-sâuren bzw. von deren reaktionsf5:higen funktionellen Deriva ten lassen sich zum Beispiel in üblicher Weise ans den a-Keto-s5,uren oder deren funktionel len Derivaten und Thiosemicarbazid bzw. sub stituierten Thiosemicarbaziden herstellen. Fer ner kann man in Stellung 4 substituierte Thio semicarbazone zum Beispiel auch herstellen, indem man die a-Keto-s5,uren Oder deren reak tionsfâhige funktionelle Derivate zunâèhst in die Hydrazone übërführt und diese mit Iso thiocyanaten, insbesondere Alkylsenf5len, um setzt. The thiosemicarbazones of a-keto acids or their reactive functional derivatives required as starting products can, for example, be prepared in the usual way from the a-keto acids or their functional derivatives and thiosemicarbazide or substituted thiosemicarbazides produce. In addition, thiosemicarbazones substituted in position 4 can also be prepared, for example, by first converting the a-keto-s5,urene or their reactive functional derivatives into the hydrazones and reacting these with isothiocyanates, in particular alkyl mustards.

Als a-Keto-s5,uren kommen allgemein sub stituierte Phenylglyoxylsâuren und Naphthyl glyoxylsâuren in Frage. Als Substituenten seiën beispielsweise genannt : Alliyl- und Al koxygruppen, Alkylmercaptogruppen und deren Oxydationsprodukte mit 4- Oder 6 wertigem Schwefel, Halogene, Nitrogruppen, Aminogruppen und substituierte Aminogrup pen, wobei das N-atom auch in einen Ring einbezogen sein kann, Acylamino-, Ureido und Thioureidogruppen, Oxy- und veresterte Oxy-gruppen, Carbalkoxy , Carbamido-(Carb i amyl)- und SuHamido-gruppen (Siffamyl gruppen). Speziell kommen in Betracht: 2-, 3- und 4-Chlor-phenyl-glyoxyls5,ure, 4 Methyl-phenyl-, 4-Athyl-phenyl-, 4-Methoxy phenyl-, 3,4-Dimethoxy-phenyl-, 4-Nitro-phe nyl-,. 2,4-Dinitro-phenyl-, 4-Amino-phenyl-, 4 Acetylamino-phenyl-, 4-Oxy-phenyl-, 2,4-Di oxy-phenyl-, 2-Acetoxy-phenyl-, 4-Carbâthoxy phenyl-glyoxylsâure. Substituted phenylglyoxylic acids and naphthylglyoxylic acids are generally suitable as a-keto-s5 acids. Substituents which may be mentioned are, for example: alliyl and alkoxy groups, alkylmercapto groups and their oxidation products with tetravalent or hexavalent sulfur, halogens, nitro groups, amino groups and substituted amino groups, where the N atom can also be included in a ring, acylamino, Ureido and thioureido groups, oxy and esterified oxy groups, carbalkoxy, carbamido (carb i amyl) and suhamido groups (siffamyl groups). Particularly suitable are: 2-, 3- and 4-chloro-phenyl-glyoxyl-5-acid, 4-methyl-phenyl-, 4-ethyl-phenyl-, 4-methoxy-phenyl-, 3,4-dimethoxy-phenyl-, 4 -nitro-phenyl-,. 2,4-dinitro-phenyl, 4-amino-phenyl, 4-acetylamino-phenyl, 4-oxy-phenyl, 2,4-dioxy-phenyl, 2-acetoxy-phenyl, 4-carbâthoxy-phenyl -glyoxylic acid.

Als substituierte Thiosemicarbazide seien genannt: 2-Methyl-, 2-thyl-, 2-Allyl-, 2-Butyl-, 2 Benzyl-, 2-Phenyl-thiosemicarbazid; S-Methyl-, S-Propyl-, S-Benzyl-thiosemicarbazid; 4-Me thyl-, 4-üthyl-, 4-Isopropyl-, 4-Allyl-, 4-Iso amyl-, 4-Benzyl-, 4-PhenS,thyl-, 4-Phenyl-, 4-p Tolyl-, 4-p-Anisyl-, 4-Pyridyl-(f)methyl-, 4 Furfuryl-thiosemicarbazid; 2-Methyl-S-me thyl-, 2-thyl-S-benzyl-thiosemicarbazid; 4 Methyl-S-phenyl-, 4-tIlyl-S-âthyl-thiosemi carbazid, 2,4-Dimethyl-, 2-Benzyl-4-5,thyl-thio semicarbazid; S-Acetyl-thiosemicarbazid. Substituted thiosemicarbazides which may be mentioned are: 2-methyl, 2-thyl, 2-allyl, 2-butyl, 2-benzyl, 2-phenyl thiosemicarbazide; S-methyl, S-propyl, S-benzyl thiosemicarbazide; 4-methyl, 4-ethyl, 4-isopropyl, 4-allyl, 4-isoamyl, 4-benzyl, 4-phenS,thyl, 4-phenyl, 4-p tolyl, 4-p-anisyl-, 4-pyridyl-(f)methyl-, 4-furfuryl-thiosemicarbazide; 2-methyl-S-methyl-, 2-thyl-S-benzyl-thiosemicarbazide; 4-methyl-S-phenyl-, 4-t-Ilyl-S-ethyl-thiosemicarbazide, 2,4-dimethyl-, 2-benzyl-4-5-ethyl-thiosemicarbazide; S-acetyl-thiosemicarbazide.

Die aufgeführten a-Keto-s5,uren und Thio semicarbazide sied zum Teil bekannt; jeden falls kënnen sie nacli Methoden hergestellt werden, die für die Herstellung der bekannten Verbindungen in der Literatur beschrieben wurden. Some of the a-keto-s5 acids and thio semicarbazides listed are known; in any case they can be prepared according to the methods described for the preparation of the known compounds in the literature.

Gegenstand vorliegenden Patentes ist ein Verfahren zur Herstellung Bines Derivates des 1,2,4-Triazins. Das Verfahren ist dadurch ge kennzeichnet, daf@ man 6-(4'-Amino-phenyl) 3-mercapto-2,5-dihydro-1,2,4-triazin-5-on ace tyliert. Die erhaltene neue Verbindung, das 6 - (4' -Acetamino -phenyl) - 3 -mercapto-2,5-di hydro-1,2,4-triazin-5-on, schmilzt bei 350 in ter Zersetzung. Sie soll therapeutische Ver wendiing finden. The subject matter of the present patent is a process for the production of a derivative of 1,2,4-triazine. The process is characterized in that 6-(4'-amino-phenyl)-3-mercapto-2,5-dihydro-1,2,4-triazin-5-one is acetylated. The new compound obtained, 6-(4'-acetamino-phenyl)-3-mercapto-2,5-dihydro-1,2,4-triazin-5-one, melts at 350 in ter decomposition. It is said to find therapeutic uses.

<I>BeispieZ:</I> 22 Teile 6-(4'-Amino-phenyl)-3-mercapto- 2,5-dihydro-1,2,4-triazin-5-on, herstellbar ans 4- Amino-phenyl-glyoxylsâure -thio-semicarbazon durch Behandlung mit ringschlieBenden Mit- teln, werden in 200 Teilen Eisessig suspen- diert, unter Rühren bei Zimmertemperatur 15 Teile Acetanhydrid zugegeben und 2 Stun- den auf 60 bis 70 erwârmt. Nach dem Abküh- len wird mit 100 Teilen Eiswasser versetzt und unter Kühlung langsam 200 Teile konz. Am- moniali zugegeben. Der Niederschlag wird ab- filtriert und mit Wasser gewaschen. Nach Um- kristalisieren aus 80 1/o igem Dioxan erhâlt man das 6-(4'-Acetamino-phenyl)-3-mercapto- 2,5-dihydro-1,2,4-triazin-5-on vom Schmelz- pimkt etwa 350 enter Zersetzung. <I>Example:</I> 22 parts of 6-(4'-amino-phenyl)-3-mercapto-2,5-dihydro-1,2,4-triazin-5-one, which can be prepared from the 4- amino Phenyl-glyoxylic acid -thio-semicarbazone by treatment with ring-closing agents are suspended in 200 parts of glacial acetic acid, 15 parts of acetic anhydride are added at room temperature with stirring and the mixture is heated to 60 to 70 for 2 hours. After cooling, 100 parts of ice water are added and 200 parts of conc. Ammoniali admitted. The precipitate is filtered off and washed with water. After recrystallization from 80% dioxane, 6-(4'-acetaminophenyl)-3-mercapto-2,5-dihydro-1,2,4-triazin-5-one is obtained from the melting point about 350 enter decomposition.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Deriva- tes des-1,2,4-Triazins, dadurch gekenuzeichnet, daB man 6-(4'-Amino-phenyl)-3-mercapto-2,5- dihydro-1,2,4-triazin-5-on acetyliert. Die erhal- tene neue Verbindung, das 6-(4'-Acetamino phenyl)-3-mercapto-2,5-dihydro-1,2,4-triazin- 5-on, schmilzt bei 350 unter Zersetzung. PATENT CLAIM: Process for the preparation of a derivative of des-1,2,4-triazine, characterized in that 6-(4'-amino-phenyl)-3-mercapto-2,5-dihydro-1,2,4 -triazine-5-one acetylated. The new compound obtained, 6-(4'-acetaminophenyl)-3-mercapto-2,5-dihydro-1,2,4-triazin-5-one, melts at 350 with decomposition.
CH288889D 1950-08-01 1950-08-01 Process for preparing a derivative of 1,2,4-triazine. CH288889A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220767A (en) * 1977-03-19 1980-09-02 Smith Kline & French Laboratories Limited Triazinones
US4337082A (en) * 1980-02-13 1982-06-29 Sumitomo Chemical Company, Limited Herbicidal composition comprising triazinone compound
US4361437A (en) 1980-02-19 1982-11-30 Sumitomo Chemical Company, Limited 3-Thiooxo-5-oxo-hexahydro-1,2,4-triazine and its production and use

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220767A (en) * 1977-03-19 1980-09-02 Smith Kline & French Laboratories Limited Triazinones
US4337082A (en) * 1980-02-13 1982-06-29 Sumitomo Chemical Company, Limited Herbicidal composition comprising triazinone compound
US4361437A (en) 1980-02-19 1982-11-30 Sumitomo Chemical Company, Limited 3-Thiooxo-5-oxo-hexahydro-1,2,4-triazine and its production and use

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