DE262048C - - Google Patents
Info
- Publication number
- DE262048C DE262048C DENDAT262048D DE262048DA DE262048C DE 262048 C DE262048 C DE 262048C DE NDAT262048 D DENDAT262048 D DE NDAT262048D DE 262048D A DE262048D A DE 262048DA DE 262048 C DE262048 C DE 262048C
- Authority
- DE
- Germany
- Prior art keywords
- carbamic acid
- acid chloride
- acetamide
- pyridine
- benzene
- 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.)
- Active
Links
- CKDWPUIZGOQOOM-UHFFFAOYSA-N carbamoyl chloride Chemical compound NC(Cl)=O CKDWPUIZGOQOOM-UHFFFAOYSA-N 0.000 claims description 5
- ACEYAMOAGUDVAQ-UHFFFAOYSA-N 2-bromo-2-ethylbutanamide Chemical compound CCC(Br)(CC)C(N)=O ACEYAMOAGUDVAQ-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims 1
- UHOVQNZJYSORNB-UHFFFAOYSA-N benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- JUJWROOIHBZHMG-UHFFFAOYSA-N pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 6
- VZGDMQKNWNREIO-UHFFFAOYSA-N Carbon tetrachloride Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- DLFVBJFMPXGRIB-UHFFFAOYSA-N acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- -1 bromo diethylacetamide Chemical compound 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- OPNPQXLQERQBBV-UHFFFAOYSA-N 2-bromo-N-carbamoyl-2-ethylbutanamide Chemical compound CCC(Br)(CC)C(=O)NC(N)=O OPNPQXLQERQBBV-UHFFFAOYSA-N 0.000 description 1
- XLJMAIOERFSOGZ-UHFFFAOYSA-N 420-05-3 Chemical compound OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 description 1
- JLTDJTHDQAWBAV-UHFFFAOYSA-N Dimethylaniline Chemical compound CN(C)C1=CC=CC=C1 JLTDJTHDQAWBAV-UHFFFAOYSA-N 0.000 description 1
- 230000001476 alcoholic Effects 0.000 description 1
- 150000003819 basic metal compounds Chemical class 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 229960001658 carbromal Drugs 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000001640 fractional crystallisation Methods 0.000 description 1
- 239000012442 inert solvent Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C273/18—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of substituted ureas
- C07C273/1809—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of substituted ureas with formation of the N-C(O)-N moiety
- C07C273/1836—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of substituted ureas with formation of the N-C(O)-N moiety from derivatives of carbamic acid
- C07C273/1845—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of substituted ureas with formation of the N-C(O)-N moiety from derivatives of carbamic acid comprising the -N-C(O)-Hal moiety
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Bei der Darstellung von Bromdiäthylacetylharnstoff
(vgl. Patentschrift 249906, Kl. 12) geht man von dem Bromdiäthylacetamid aus,
auf welches man Cyansäure einwirken läßt.
Dieses bekannte Herstellungsverfahren ist kompliziert und für eine technische Fabrikation
wenig geeignet, denn es werden Lösungen des Bromdiäthylacetamids in Tetrachlorkohlenstoff
verwendet, und da die Reaktion bei einer Temperatur von ioo° während eines
Zeitraumes von 5 Stunden vor sich gehen muß, so ist es selbstverständlich, daß unter
Druck gearbeitet wird, da der Tetrachlorkohlenstoff bei 78 ° siedet.In the representation of Bromdiäthylacetylurea (see. Patent specification 249906, Cl. 12) one starts from the Bromdiäthylacetamid, on which cyanic acid is allowed to act.
This known manufacturing process is complicated and unsuitable for industrial fabrication, because solutions of bromodiethylacetamide in carbon tetrachloride are used, and since the reaction must take place at a temperature of 100 ° for a period of 5 hours, it goes without saying that is worked under pressure, since the carbon tetrachloride boils at 78 °.
Das vorliegende Verfahren ist bestimmt, die Mängel des bekannten Verfahrens zu beseitigen ; es bedient sich des Carbaminsäurechlorids, welches man auf Bromdiäthylacetamid ■ einwirken läßt.The present method is intended to remedy the shortcomings of the known method ; it uses the carbamic acid chloride, which one on Bromdiäthylacetamid ■ can act.
Man kann in der Weise verfahren, daß man das Acetamid durch Erwärmen im Wasserbade zum Schmelzen bringt und bei einer Temperatur, zweckmäßig 60 ° bis 70 °, die berechneten Mengen Carbaminsäurechlorid unter Umrühren eintropfen läßt. Es tritt Entwicklung von gasförmiger Salzsäure ein, und die Masse erstarrt alsbald zu einem festen Kristallbrei, welcher aus unverändertem Acetamid und aus Bromdiäthylacetylcarbamid besteht.One can proceed in such a way that the acetamide is heated in a water bath brings to melt and at a temperature, expediently 60 ° to 70 °, the calculated Amounts of carbamic acid chloride can be added dropwise with stirring. There is development of gaseous hydrochloric acid, and the mass soon solidifies to a solid crystal paste, which consists of unchanged acetamide and bromo diethylacetylcarbamide.
Die Kristallmasse wird mit Wasser gewaschen und dann einer fraktionierten Kristallisation aus Alkohol unterworfen, wobei sich der Harnstoff beim Erkalten der konzentrierten alkoholischen Lösung in Kristallen vom Schmelzpunkt 119 ° ausscheidet, wie sich bei dem weiteren Umkristallisieren der Substanz herausgestellt hat, während das unveränderte Acetamid in der Mutterlauge zurückbleibt. Man kann die Reaktion auch ausführen, indem man das Acetamid in einem indifferenten Lösungsmittel, wie z. B. Benzol, löst und dann das Carbaminsäurechlorid hinzufügt und gleichzeitig ein Salzsäure bindendes Medium, wie Pyridin, Dimethylanilin oder andere organische Basen bzw. basische Metallverbindungen verwendet.The crystal mass is washed with water and then subjected to fractional crystallization Subjected from alcohol, whereby the urea is concentrated when the cooled alcoholic solution precipitates in crystals with a melting point of 119 °, as is the case with the Further recrystallization of the substance has been found, while the unchanged Acetamide remains in the mother liquor. The reaction can also be carried out by the acetamide in an inert solvent, such as. B. Benzene, dissolves and then add the carbamic acid chloride and at the same time a hydrochloric acid binding medium, such as pyridine, dimethylaniline or other organic bases or basic metal compounds used.
Zu 180 g Bromdiäthylacetamid, in 100 g Benzol gelöst, werden portionsweise unter Umrühren und mäßiger Kühlung 80 g Carbaminsäurechlorid und 80 g Pyridin abwechselnd zugesetzt. Das Reaktionsgemisch wird nach Verdunsten des Benzols mit angesäuertem Wasser verrieben, um das salzsaure Pyridin zu entfernen. Die weitere Reinigung erfolgt wie oben beschrieben.To 180 g of bromo diethylacetamide, in 100 g Dissolved benzene, 80 g of carbamic acid chloride are added in portions with stirring and moderate cooling and 80 g of pyridine added alternately. The reaction mixture is after Evaporation of the benzene with acidified water triturated to make the hydrochloric pyridine to remove. The further cleaning takes place as described above.
Das Verfahren zeichnet sich durch große Einfachheit aus und bietet eine gute Ausbeute; es hat auch den weiteren Vorzug, daß der nicht in Reaktion getretene Rest des Bromdiäthylacetamids in unverändertem Zustande erhalten bleibt und daher ohne weiteres für die Wiederholung des Herstellungsverfahrens verwendet werden kann.The process is characterized by great simplicity and offers a good yield; it also has the further advantage that the unreacted remainder of the bromine diethylacetamide remains unchanged and therefore without further ado for the repetition of the manufacturing process can be used.
Claims (1)
Publications (1)
Publication Number | Publication Date |
---|---|
DE262048C true DE262048C (en) |
Family
ID=519551
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT262048D Active DE262048C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE262048C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2586676A1 (en) * | 1985-08-29 | 1987-03-06 | Union Explosivos Rio Tinto | Process for the production of compounds derived from benzoylurea |
-
0
- DE DENDAT262048D patent/DE262048C/de active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2586676A1 (en) * | 1985-08-29 | 1987-03-06 | Union Explosivos Rio Tinto | Process for the production of compounds derived from benzoylurea |
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