WO2003010151A1 - Verfahren zur herstellung von 4-methylpyrimidin - Google Patents
Verfahren zur herstellung von 4-methylpyrimidin Download PDFInfo
- Publication number
- WO2003010151A1 WO2003010151A1 PCT/EP2001/008614 EP0108614W WO03010151A1 WO 2003010151 A1 WO2003010151 A1 WO 2003010151A1 EP 0108614 W EP0108614 W EP 0108614W WO 03010151 A1 WO03010151 A1 WO 03010151A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reaction
- butanone
- methylpyrimidine
- formamidine
- dialkoxy
- 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.)
- Ceased
Links
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
- C07D239/26—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 only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
Definitions
- the present invention relates to a process for the preparation of 4-methylpyrimidine, which is a valuable intermediate for the production of pharmaceuticals and crop protection agents.
- the present invention was therefore based on the object of developing a technically simple process for the preparation of 4-methylpyrimidine which does not have the stated disadvantages of the prior art, but rather from technically available ones Raw materials under relatively mild reaction conditions provides good yields.
- a 4,4-dialkoxy-2-butanone is reacted as a CV component with a formamidine salt as an NCN component.
- 4,4-dialkoxy-2-butanones such.
- B. 4,4-dimethoxy-butanone and 4,4-diethoxy-2-butanone are particularly suitable, the 4,4-dimethoxy-2-butanone which is readily available industrially to be regarded as particularly preferred.
- Suitable formamidine salts are e.g. B. corresponding salts of carboxylic acids, hydrohalic acids or oxygen acids and in particular the acetate, the hydrochloride and the sulfate. These formamidine salts can be produced in a technically simple manner, such as. B. the formamidine acetate (see. DE-OS 38 08 767).
- reaction of these two starting substances can be carried out with or without solvents or diluents (e.g. alcohols, esters or carboxylic acids) and with or without the addition of other substances, e.g. Catalysts (especially acids or acid salts) take place.
- solvents or diluents e.g. alcohols, esters or carboxylic acids
- other substances e.g. Catalysts (especially acids or acid salts) take place.
- the reaction is preferably carried out without the addition of solvents or other substances.
- the molar ratio of 4,4-dialkoxy-2-butanone to formarnidine salts is preferably between 1: 2 to 2: 1, in particular between 1.2: 1 to 1: 1.2.
- the starting compounds can be introduced together, but it is easily possible to meter in one of the two starting components during the reaction.
- the reaction according to the invention is carried out at temperatures from 80 to 180 ° C., preferably at 110 to 150 ° C.
- Arising alcohol e.g. Methanol or ethanol can be refluxed. According to a preferred embodiment, however, it is continuously removed from the reaction mixture by distillation.
- the reaction time is usually 0.5 to 48 hours, preferably 2 to 8 hours.
- the reaction mixture is preferably cooled with water and a strong base, e.g. Sodium hydroxide solution, and the 4-methylpyrimidine is extracted in a known manner with an organic solvent (such as, for example, t-butyl methyl ether), and the 4-methylpyrimidine is purified by distillation after the solvent has been removed, the purification preferably being carried out with the aid of fractional distillation ,
- a strong base e.g. Sodium hydroxide solution
- an organic solvent such as, for example, t-butyl methyl ether
- Example 1 (comparison according to Bredereck et. Al.)
- the viscous reaction product was treated with 500 ml of water and 65 g
- the total isolated yield was calculated to be 34.0%.
- the mixture was cooled, mixed with 100 g of water and 65 g of 50% sodium hydroxide solution and extracted continuously with t-butyl methyl ether for a total of 20 hours.
- the total isolated yield was calculated to be 61.8%.
- the mixture was cooled, 300 g of water and 165.5 g of 50% sodium hydroxide solution were added and the mixture was extracted continuously with t-butyl methyl ether for a total of 20 hours.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/451,092 US6841672B2 (en) | 2000-01-24 | 2001-07-25 | Method for producing 4-methyl pyrimidine |
| PCT/EP2001/008614 WO2003010151A1 (de) | 2001-07-25 | 2001-07-25 | Verfahren zur herstellung von 4-methylpyrimidin |
| EP01969512A EP1409462A1 (de) | 2001-07-25 | 2001-07-25 | Verfahren zur herstellung von 4-methylpyrimidin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2001/008614 WO2003010151A1 (de) | 2001-07-25 | 2001-07-25 | Verfahren zur herstellung von 4-methylpyrimidin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003010151A1 true WO2003010151A1 (de) | 2003-02-06 |
Family
ID=8164518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2001/008614 Ceased WO2003010151A1 (de) | 2000-01-24 | 2001-07-25 | Verfahren zur herstellung von 4-methylpyrimidin |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1409462A1 (de) |
| WO (1) | WO2003010151A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11439738B2 (en) | 2007-11-29 | 2022-09-13 | Fresenius Medical Care Holdings, Inc. | Methods and Systems for fluid balancing in a dialysis system |
| US11525798B2 (en) | 2012-12-21 | 2022-12-13 | Fresenius Medical Care Holdings, Inc. | Method and system of monitoring electrolyte levels and composition using capacitance or induction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE822086C (de) * | 1946-12-28 | 1951-11-22 | Gen Aniline & Film Corp | Verfahren zur Herstellung von Pyrimidinen |
| SU91299A1 (ru) * | 1949-12-01 | 1975-07-30 | Способ получени производных пирамидина | |
| DE4308073A1 (de) * | 1993-03-13 | 1994-09-15 | Basf Ag | Verfahren zur Herstellung von 4-Methylpyrimidinen |
| DE10002835C1 (de) * | 2000-01-24 | 2001-12-13 | Sueddeutsche Kalkstickstoff | Verfahren zur Herstellung von 4-Methylpyrimidin |
-
2001
- 2001-07-25 WO PCT/EP2001/008614 patent/WO2003010151A1/de not_active Ceased
- 2001-07-25 EP EP01969512A patent/EP1409462A1/de not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE822086C (de) * | 1946-12-28 | 1951-11-22 | Gen Aniline & Film Corp | Verfahren zur Herstellung von Pyrimidinen |
| SU91299A1 (ru) * | 1949-12-01 | 1975-07-30 | Способ получени производных пирамидина | |
| DE4308073A1 (de) * | 1993-03-13 | 1994-09-15 | Basf Ag | Verfahren zur Herstellung von 4-Methylpyrimidinen |
| DE10002835C1 (de) * | 2000-01-24 | 2001-12-13 | Sueddeutsche Kalkstickstoff | Verfahren zur Herstellung von 4-Methylpyrimidin |
Non-Patent Citations (1)
| Title |
|---|
| CHEMICAL ABSTRACTS, vol. 83, no. 28, 1975, Columbus, Ohio, US; abstract no. 193373u, page 475; column 1; XP002192110 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11439738B2 (en) | 2007-11-29 | 2022-09-13 | Fresenius Medical Care Holdings, Inc. | Methods and Systems for fluid balancing in a dialysis system |
| US11525798B2 (en) | 2012-12-21 | 2022-12-13 | Fresenius Medical Care Holdings, Inc. | Method and system of monitoring electrolyte levels and composition using capacitance or induction |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1409462A1 (de) | 2004-04-21 |
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