DE182559C - - Google Patents
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- Publication number
- DE182559C DE182559C DENDAT182559D DE182559DA DE182559C DE 182559 C DE182559 C DE 182559C DE NDAT182559 D DENDAT182559 D DE NDAT182559D DE 182559D A DE182559D A DE 182559DA DE 182559 C DE182559 C DE 182559C
- Authority
- DE
- Germany
- Prior art keywords
- cyclic
- added
- sodium
- urea
- minutes
- 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.)
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- 150000001447 alkali salts Chemical class 0.000 claims description 7
- QCTAUOIBRPZHKI-UHFFFAOYSA-N 2-cyano-N-(dimethylcarbamoyl)acetamide Chemical compound CN(C)C(=O)NC(=O)CC#N QCTAUOIBRPZHKI-UHFFFAOYSA-N 0.000 claims description 5
- -1 cyanoacetylmethyl Chemical group 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 150000003230 pyrimidines Chemical class 0.000 claims description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 10
- 125000004122 cyclic group Chemical group 0.000 description 7
- LPXPTNMVRIOKMN-UHFFFAOYSA-M Sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- 239000004202 carbamide Substances 0.000 description 5
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 3
- 235000019800 disodium phosphate Nutrition 0.000 description 3
- 229910000397 disodium phosphate Inorganic materials 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 235000010288 sodium nitrite Nutrition 0.000 description 3
- 239000001488 sodium phosphate Substances 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M NaHCO3 Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- SCVFZCLFOSHCOH-UHFFFAOYSA-M Potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L Sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001923 cyclic compounds Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 150000002832 nitroso derivatives Chemical class 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- 235000010339 sodium tetraborate Nutrition 0.000 description 2
- 239000004328 sodium tetraborate Substances 0.000 description 2
- QJGRPCPCQQPZLZ-UHFFFAOYSA-N N-carbamoyl-2-cyanoacetamide Chemical compound NC(=O)NC(=O)CC#N QJGRPCPCQQPZLZ-UHFFFAOYSA-N 0.000 description 1
- 229940083082 Pyrimidine derivatives acting on arteriolar smooth muscle Drugs 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002349 favourable Effects 0.000 description 1
- VRWZUHBJODTMPU-UHFFFAOYSA-K hexasodium;borate;phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[O-]B([O-])[O-].[O-]P([O-])([O-])=O VRWZUHBJODTMPU-UHFFFAOYSA-K 0.000 description 1
- 235000011056 potassium acetate Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 125000000561 purinyl group Chemical class N1=C(N=C2N=CNC2=C1)* 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
- C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
- C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
- C07D239/28—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more 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, directly attached to ring carbon atoms
- C07D239/46—Two or more oxygen, sulphur or nitrogen atoms
- C07D239/52—Two oxygen atoms
- C07D239/54—Two oxygen atoms as doubly bound oxygen atoms or as unsubstituted hydroxy radicals
- C07D239/545—Two oxygen atoms as doubly bound oxygen atoms or as unsubstituted hydroxy radicals with other hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
PATENTSCHRIFTPATENT LETTERING
KLASSE Mp. GRUPPECLASS Mp. GROUP
Dr. PAUL HÖRING in BERLIN.Dr. PAUL HÖRING in BERLIN.
Wird zu einer nähe bis zum Kochen erhitzten Lösung von Cyanacetylmethylharnstoff Becomes a solution of cyanoacetylmethylurea heated to a boil
NHNH COCO
I II I
C O CH2 CO CH 2
I II I
NH(CH3) CNNH (CH 3 ) CN
in etwa der 15- bis 20 fachen Menge Wasser ein Alkalisalz einer schwachen Säure in der genügenden Menge hinzugefügt, so scheidet sich aus der heißen Lösung, je nach der Natur des zugesetzten Salzes, rascher oder langsamer das cyklische Isomere obiger Verbindung, das 3-Methyl-4-amino-2 · 6-dioxypyrimidin in about 15 to 20 times the amount of water an alkali salt of a weak acid is added in sufficient quantity, so separates from the hot solution, depending on the nature of the added salt, faster or slower the cyclic isomer of the above compound, the 3-methyl-4-amino-2 · 6-dioxypyrimidine
NH- CONH- CO
CO CH2 CO CH 2
N(CHB)—C:NHN (CH B ) -C: NH
aus, dessen Eigenschaften und Verwertbarkeit für Synthesen in der Purinreihe bekannt sind (vergl. WiIh. Traube, Ber. d. deutschen ehem. Ges. XXXIII [1900], S. 3047).whose properties and usability for syntheses in the purine series are known are (see WiIh. Traube, Ber. d. German former Ges. XXXIII [1900], p. 3047).
Besonders geeignet erweist sich das Natriumborat und Dinatriumphosphat, auch das Natriumacetat ist verwendbar. Man setzt von den kristallisierten Salzen etwa die Y2- bis ι '/2 fache Menge vom Gewicht des Harnstoffes zu. Bei Verwendung von Borax scheidet sich die schwer lösliche cyklische Verbindung- in 1 bis 2 Minuten aus, bei Verwendung von Dinatriumphosphat geschieht dies nach 3 bis 5 Minuten, während mit Natriumacetat Y4 Stunde und länger erhitzt werden muß. In allen diesen Fällen kann das Erhitzen beträchtlich lange fortgesetzt werden, ohne daß sich eine Ammoniakentwicklung in irgendwie erheblichem Maße zeigt.Sodium borate and disodium phosphate have proven to be particularly suitable, and sodium acetate can also be used. About the Y 2 - to ι '/ 2 times the amount of the weight of the urea is added from the crystallized salts. When using borax, the sparingly soluble cyclic compound separates out in 1 to 2 minutes, when using disodium phosphate this happens after 3 to 5 minutes, while with sodium acetate Y has to be heated for 4 hours and longer. In all of these cases the heating can be continued for a considerable length of time without any significant evolution of ammonia being evident.
Außer den genannten Alkalisalzen schwacher, aber nicht oder nicht leicht flüchtiger Säuren können auch die Alkalisalze schwacher, flüchtiger Säuren, wie Natriumsulfit, Natriumnitrit, Natriumbicarbonat und Natriumcarbonat, verwendet werden. Doch ist dann der Erfolg ein viel geringerer, da nach Zusatz dieser Salze alsbald eine sehr beträchtliche Ammoniakentwicklung auftritt und von dem cyklischen Isomeren nur wenig und dieses auch nicht rein ausgeschieden wird. Das gleiche ist der Fall, wenn man durch Zusatz von freiem Alkali zur kochenden Lösung den Cyanacetylmethylharnstoff zum größeren oder geringeren Teil in ein Alkalisalz überführt.Except for the alkali salts mentioned, weak but not or not easily volatile acids the alkali salts of weak, volatile acids such as sodium sulfite, sodium nitrite, Sodium bicarbonate and sodium carbonate can be used. But then the success is much less, since after addition of these salts immediately a very considerable evolution of ammonia occurs and of the cyclic isomer only a little and this is also not excreted in pure form. The same is the case when adding free alkali to the boiling Dissolve the cyanoacetylmethylurea to a greater or lesser extent in an alkali salt convicted.
Das eben beschriebene Verfahren ist auch auf den Dimethylcyanacetylharnstoff zur Überführung in sein cyklisches Isomere anwendbar, jedoch ist hier auch bei Anwendung der zuletzt genannten Alkalisalze ein ziemlich günstiger Erfolg erreichbar.The method just described is also applicable to the dimethylcyanacetylurea Conversion into its cyclic isomer can be used, but is also used here the last-mentioned alkali salts a fairly favorable success can be achieved.
Von dem in der Patentschrift 117922, Kl. 12 p, beschriebenen Verfahren zur Überführung von Cyanacetylharnstoff und Cyanacetylalkylharnstoffen in Pyrimidinderivate unterscheidet sich das vorliegende Verfahren dadurch, daß durch dieses die Umwandlung des offenen Harnstoffes unmittelbar in die freie cyklische Verbindung erfolgt. Es bietet außerdem jenem gegenüber in technischer Hinsicht den bedeutenden Vorteil, daß dieFrom the one in patent specification 117922, Cl. 12 p, described method for the transfer of cyanoacetylurea and cyanoacetylalkylureas The present process differs from pyrimidine derivatives in that it involves the conversion of the open urea takes place directly in the free cyclic compound. It offers also has the significant advantage over that from a technical point of view that the
zur Umlagerung benutzten Alkalisalze unverändert Aviedergewonnen werden.alkali salts used for rearrangement are recovered unchanged.
IOO g Cyanacetylmethylharnstoff werden in 2 1 Wasser heiß gelöst und in die nahe beim Kochen gehaltene Lösung 125 g Dinatriumphosphat (Na2 HP O4 + 12 K2 OJ eingetragen. Nach einigen Minuten beginnt sich das cyklische Isomere in der Hitze abzuscheiden. Man erhitzt noch etwa 10 Minuten, läßt erkalten und saugt den rein erhaltenen cyklischen Harnstoff ab. Die Ausbeute beträgt 70 bis 80 Prozent des angewandten Harnstoffes.100 g of cyanoacetylmethylurea are dissolved in 2 l of hot water and 125 g of disodium phosphate (Na 2 HP O 4 + 12 K 2 OI are added to the solution, which is kept near the boil. After a few minutes, the cyclic isomer begins to separate out in the heat. It is still heated about 10 minutes, allowed to cool and sucks off the pure cyclic urea obtained, the yield is 70 to 80 percent of the urea used.
100 g Cyanacetylmethylharnstoff werden100 g cyanoacetylmethylurea will be
genau wie in Beispiel I mit 100 g Borax behandelt. Die Ausscheidung des cyklischen Produkts erfolgt schon nach 1 bis 2 Minuten.Treated exactly as in Example I with 100 g of borax. The elimination of the cyclical Product takes place after 1 to 2 minutes.
Beispiel III.Example III.
3,9 g Ditnethylcyanacetylharnstoff werden in 18 ecm Wasser gelöst und zur heißen Lösung i,sg Natriumnitrit hinzugefügt. Die Lösung färbt sich gelb, dann rötlich und es scheidet sich binnen kurzem ein reichlicher Niederschlag ab. Wird nun mit verdünnter Essigsäure angesäuert, so gewinnt man sogleich die bekannte Nitrosoverbindung des cyklischen Cyanacetyldimethylharnstoffes, und zwar 4,5 g.3.9 g of dimethylcyanoacetylurea are dissolved in 18 ecm of water and heated to the hot Solution i, so-called sodium nitrite added. The solution turns yellow, then reddish and it abundant precipitation separates within a short time. Is now diluted with Acetic acid acidified, the well-known nitroso compound des is immediately obtained cyclic cyanoacetyldimethylurea, 4.5 g.
Beispiel IV. „_Example IV. "_
2,5 g Dimethylcyanacetylharnstoff werden in 20 ecm Wasser gelöst und zur heißen Lösung o,6 g Kaliumacetat hinzugefügt. Nach '/4 stündigem Erhitzen beginnt in der Wärme die Abscheidung von Kristallen des zyklischen Harnstoffes. Durch Hinzufügen von 1,1 g Natriumnitrit und verdünnter Essigsäure können 1,9 g der Nitrosoverbindung, wie in Beispiel III angegeben ist, erhalten werden.2.5 g of dimethylcyanoacetylurea are dissolved in 20 ecm of water and 0.6 g of potassium acetate is added to the hot solution. After '/ 4 hours of heating, the deposition of crystals of the cyclic urea in the heat begins. By adding 1.1 g of sodium nitrite and dilute acetic acid, 1.9 g of the nitroso compound as indicated in Example III can be obtained.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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DE182559C true DE182559C (en) |
Family
ID=446646
Family Applications (1)
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Country Status (1)
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE752285C (en) * | 1942-04-29 | 1953-07-13 | Henning Laokoon Chem Pharm Wer | Process for the preparation of 1, 3-dimethyl-4-imino-2, 6-dioxohexahydropyrimidine |
-
0
- DE DENDAT182559D patent/DE182559C/de active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE752285C (en) * | 1942-04-29 | 1953-07-13 | Henning Laokoon Chem Pharm Wer | Process for the preparation of 1, 3-dimethyl-4-imino-2, 6-dioxohexahydropyrimidine |
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