CH181732A - Process for the preparation of a compound of 1-phenyl-2,3-dimethyl-4-isopropyl-5-pyrazolone with diethyl barbituric acid. - Google Patents
Process for the preparation of a compound of 1-phenyl-2,3-dimethyl-4-isopropyl-5-pyrazolone with diethyl barbituric acid.Info
- Publication number
- CH181732A CH181732A CH181732DA CH181732A CH 181732 A CH181732 A CH 181732A CH 181732D A CH181732D A CH 181732DA CH 181732 A CH181732 A CH 181732A
- Authority
- CH
- Switzerland
- Prior art keywords
- phenyl
- dimethyl
- pyrazolone
- isopropyl
- compound
- Prior art date
Links
- 150000001875 compounds Chemical class 0.000 title claims description 10
- PXWLVJLKJGVOKE-UHFFFAOYSA-N propyphenazone Chemical compound O=C1C(C(C)C)=C(C)N(C)N1C1=CC=CC=C1 PXWLVJLKJGVOKE-UHFFFAOYSA-N 0.000 title claims description 8
- FTOAOBMCPZCFFF-UHFFFAOYSA-N 5,5-diethylbarbituric acid Chemical compound CCC1(CC)C(=O)NC(=O)NC1=O FTOAOBMCPZCFFF-UHFFFAOYSA-N 0.000 title claims description 7
- 229960002319 barbital Drugs 0.000 title claims description 7
- 238000000034 method Methods 0.000 title claims description 5
- 238000002360 preparation method Methods 0.000 title claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000000202 analgesic effect Effects 0.000 claims description 2
- 230000001754 anti-pyretic effect Effects 0.000 claims description 2
- 239000002221 antipyretic Substances 0.000 claims description 2
- 239000003814 drug Substances 0.000 claims description 2
- 230000001939 inductive effect Effects 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 229940051880 analgesics and antipyretics pyrazolones Drugs 0.000 claims 1
- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims 1
- 229940079593 drug Drugs 0.000 claims 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 239000007858 starting material Substances 0.000 description 3
- 125000001424 substituent group Chemical group 0.000 description 2
- ZRHUHDUEXWHZMA-UHFFFAOYSA-N 1,4-dihydropyrazol-5-one Chemical compound O=C1CC=NN1 ZRHUHDUEXWHZMA-UHFFFAOYSA-N 0.000 description 1
- RMMXTBMQSGEXHJ-UHFFFAOYSA-N Aminophenazone Chemical compound O=C1C(N(C)C)=C(C)N(C)N1C1=CC=CC=C1 RMMXTBMQSGEXHJ-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- VEQOALNAAJBPNY-UHFFFAOYSA-N antipyrine Chemical compound CN1C(C)=CC(=O)N1C1=CC=CC=C1 VEQOALNAAJBPNY-UHFFFAOYSA-N 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- -1 arylalkyl barbituric acid Chemical compound 0.000 description 1
- 150000007656 barbituric acids Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Landscapes
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Description
Verfahren zur Darstellung einer Verbindung des 1-Phenyl-2,3-dimetllyl- 4-isoprol)yl-n-pyrazolons mit Diäthylbarbitursäure. Es ist bekannt, dass sowohl 1-Phenyl-2,3- rlimethyl-5-pyra.zolon, als auch 1-Phenyl- 2, 3 - di methyl - 4 - dimethylamino- 5- pyrazolon sich mit Dia.lkyl- und Arylalkylbarbitur- säure verbinden (Patentschriften Nr.120098,
120444j46, 1.21981/85 und 97751., 113103j05, 113056, 113295/97). Entsprechende Verbin dungen mit 4-Alkylpyrazolonen sind bis ;jetzt noch nicht hergestellt worden.
Wie nun gefunden wurde, verhält sich das 1-Phenyl-2,3-dimethyl-4-isopropyl-5-pyr- azolon nicht gleich wie das 1-Phenyl-2,3-di- methyl-5-pyrazolon und das 1.-Phenyl-2,3-di- methyl-4-dimethylamino-#5-pyrazolon. Es geht nämlich nur mit solchen C,C-disubsti- tuierten Barbitursäuren Verbindungen ein, die nur gesättigte oder höchstens nur einen ungesättigten Substituenten besitzen. Sind beide Substituenten ungesättigt, so unter bleibt die Bildung von Verbindungen.
Die Darstellung der neuen Verbindungen gestaltet sich bci der grossen Neigung der Ausgangsstoffe zum Zusammentritt sehr ein fach. Man schmilzt das 1-Phenyl-2,3-di- methyl-4-isopropyl-5-pyrazolon mit der ä.qui- molekularen Menge einer Dialkyl- oder Arylalkylbarbitursäure zusammen oder lässt die Ausgangsstoffe in Gegenwart eines Lö- sungs- bezw. Verdünnungsmittels aufeinan der einwirken.
Die Vereinigung des 1- Phenyl -<B>2,3</B> - dimethyl - 4 -isopropyl - 5 -pyrazo- lons mit den Dialkyl- bezvT. Arylalkylbar- bitursäuren erfolgt stets im molekularen Verhältnis .auch dann. wenn von dem einen oder andern Bestandteil wesentlich grössere Mengen, zum Beispiel 2 Moleküle, vorhanden sind.
Gegenstand des vorliegenden Patentes ist ein Verfahren zur Darstellung einer Verbin dung des 1-Phenyl-2,3-dimethyl-4-isopropyl- 5-pyrazolons mit Diäthylbarbitursäure, wel ches dadurch gekennzeichnet ist, dass man 1- Phenyl - 2,3-dimethyl-4-isopropyl-5-pyrazolon und Diäthylbarbitursäure im Molekularver- hältnis 1 : 1 aufeinander einwirken lässt. Die Ausgangsstoffe können zum Beispiel in ge schmolzenem Zustand oder in einem Lö sungsmittel aufeinander einwirken gelassen werden.
Die Verbindung des 1-Phenyl-2,3-di- inethy l-1-isopr opyl-5-pyrazolons mit Diäthyl- barbitursäure kristallisiert in feinen farb losen Nadeln, die bei 138 bis<B>139</B> schmel zen. Sie lässt sich durch Behandeln mit Lö sungsmitteln nicht in die Bestandteile zer legen. In organischen Lösungsmitteln ist sie leicht, in Wasser schwer löslich. Sie soll als Arzneimittel Verwendung finden, da sie so wohl analgetische bezw. antipyretische, als auch schlafmachende Wirkungen besitzt.
<I>Beispiel:</I> 230 Teile 1-Phenyl-2,3-dimethyl-4-iso- propyl-5-pyrazolon werden in 600 Teilen 50%igem Methanol warm gelöst. Zu dieser Lösung gibt man eine warme Lösung von 18.1 Teilen Diäthylbarbitursäure in 1400 Teilen 50%igem Methanol. Beim Abkühlen kristallisieren 3-60 Teile der neuen Verbin dung vom Schmelzpunkt 138 bis 139 aus. Der Rest ist aus der 3lutterlauge mit Was ser fällbar.
Process for the preparation of a compound of 1-phenyl-2,3-dimetllyl-4-isoprol) yl-n-pyrazolone with diethylbarbituric acid. It is known that both 1-phenyl-2,3-rlimethyl-5-pyra.zolon and 1-phenyl-2,3-dimethyl-4-dimethylamino-5-pyrazolone react with dialkyl and arylalkyl barbitur - connect acid (patent specification no.120098,
120444j46, 1.21981 / 85 and 97751., 113103j05, 113056, 113295/97). Corresponding compounds with 4-alkylpyrazolones have not yet been made.
As has now been found, the 1-phenyl-2,3-dimethyl-4-isopropyl-5-pyrazolone does not behave in the same way as the 1-phenyl-2,3-dimethyl-5-pyrazolone and the 1. -Phenyl-2,3-dimethyl-4-dimethylamino- # 5-pyrazolone. This is because it only forms compounds with those C, C-disubstituted barbituric acids which have only saturated or at most only one unsaturated substituent. If both substituents are unsaturated, compounds are not formed.
The presentation of the new compounds is very simple due to the great tendency of the starting materials to come together. The 1-phenyl-2,3-dimethyl-4-isopropyl-5-pyrazolone is melted with the equimolecular amount of a dialkyl or arylalkyl barbituric acid or the starting materials are left in the presence of a solution or. Thinners act on each other.
The union of the 1-phenyl - <B> 2,3 </B> - dimethyl - 4 -isopropyl - 5-pyrazolone with the dialkyl bezvT. Arylalkylbarbituric acids always take place in the molecular ratio, even then. if there are significantly larger quantities of one or the other component, for example 2 molecules.
The present patent is a process for the preparation of a connec tion of 1-phenyl-2,3-dimethyl-4-isopropyl-5-pyrazolone with diethylbarbituric acid, wel ches is characterized in that 1-phenyl-2,3-dimethyl -4-isopropyl-5-pyrazolone and diethylbarbituric acid can act on one another in a molecular ratio of 1: 1. The starting materials can, for example, be allowed to act on one another in the molten state or in a solvent.
The compound of 1-phenyl-2,3-dimethyl-1-isopropyl-5-pyrazolone with diethylbarbituric acid crystallizes in fine, colorless needles that melt at 138 to 139. It cannot be broken down into its components by treatment with solvents. It is easily soluble in organic solvents and sparingly soluble in water. It should be used as a medicine, as it is so well analgesic bezw. has antipyretic and sleep-inducing effects.
<I> Example: </I> 230 parts of 1-phenyl-2,3-dimethyl-4-isopropyl-5-pyrazolone are dissolved warm in 600 parts of 50% methanol. A warm solution of 18.1 parts of diethylbarbituric acid in 1400 parts of 50% methanol is added to this solution. On cooling, 3-60 parts of the new compound crystallize with a melting point of 138 to 139. The rest can be precipitated with water from the 3lutter liquor.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE181732X | 1934-01-08 | ||
| CH179887T | 1934-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH181732A true CH181732A (en) | 1935-12-31 |
Family
ID=25720347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH181732D CH181732A (en) | 1934-01-08 | 1934-11-20 | Process for the preparation of a compound of 1-phenyl-2,3-dimethyl-4-isopropyl-5-pyrazolone with diethyl barbituric acid. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH181732A (en) |
-
1934
- 1934-11-20 CH CH181732D patent/CH181732A/en unknown
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