WO2003010134A1 - Verfahren zur herstellung von 1,2,4-triaminobenzol-carbamidsäureestern - Google Patents
Verfahren zur herstellung von 1,2,4-triaminobenzol-carbamidsäureestern Download PDFInfo
- Publication number
- WO2003010134A1 WO2003010134A1 PCT/EP2002/007301 EP0207301W WO03010134A1 WO 2003010134 A1 WO2003010134 A1 WO 2003010134A1 EP 0207301 W EP0207301 W EP 0207301W WO 03010134 A1 WO03010134 A1 WO 03010134A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- general formula
- reaction
- acid esters
- triaminobenzolecarbamic
- production
- 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
- 0 *c1cc(N(*)C[Al])ccc1N* Chemical compound *c1cc(N(*)C[Al])ccc1N* 0.000 description 3
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C269/00—Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C269/04—Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups from amines with formation of carbamate groups
Definitions
- the present invention relates to a new process for the preparation of 1,2,4-triaminobenzenes of the general formula i
- R ⁇ R 2 , R 3l R 4 , R 5 , and Ar have the following meanings: R 1 ⁇ R 3 , R 5 : hydrogen, C r C 6 -alkyl, or the rest Ar;
- R 2 is hydrogen or C r C 3 alkyl
- R 4 C r C 6 alkyl, C 3 -C 7 cycloalkyl, CC 6 alkanoyl or the radical Ar;
- Ar phenyl radical which is substituted by the radicals R 6 , R 7 and / or R 3 , these radicals R 6 , R 7 and R 8 being identical or different and C r C 6 alkyl, C 3 -C 7 cycloalkyl or halogen;
- R ⁇ R 2 , R 3 , R 5 and Ar have the meanings given by N-acylation with a suitable pyro or polypyrocarbonate of the general formula III
- the catalysts which are added to increase the selectivity, primarily N-ethyl-diisopropylamine, form salts with the hydrogen chloride liberated and have to be removed with great effort after the reaction.
- the product can also be contaminated with process-typical, especially chlorine-containing by-products that are very difficult to separate.
- chlorinated carbonic acid derivatives Another disadvantage of the use of chlorinated carbonic acid derivatives is that compounds of the general formula II act as acid scavengers and can therefore undergo increased side reactions, which leads to losses in the yield of the end product.
- the object of the invention is therefore to make compounds of the general formula I accessible in relation to the known process with improved yield and purity and to dispense with basic catalysts for the preparation of compounds of the general formula I.
- the target product can be produced by using suitable pyro- or polypyrocarbonates of the general formula III
- Acid traps can be dispensed with.
- the triaminobenzene derivatives react at low temperatures with pyrocarbonate on the desired nitrogen atom to give the corresponding carbamates.
- the addition of a catalyst is not necessary.
- the carbamate usually crystallizes out very pure during the reaction.
- the reaction can be controlled very well by observing the escaping carbon dioxide. The end point of the reaction is reached when no more carbon dioxide escapes.
- the ethyl pyrocarbonate process is very easy to control, since the CO 2 formed enables continuous control of the conversion.
- a great advantage of the process is that it is not necessary to add the catalysts which can be used according to the prior art. These catalysts represent a process load which is avoided by the process according to the invention.
- the following examples illustrate the invention.
- Washed ethanol Washed ethanol.
- HPLC diagrams show that the crude product is significantly purer by the process according to the invention.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP02790169A EP1414791A1 (de) | 2001-07-25 | 2002-07-02 | Verfahren zur herstellung von 1,2,4-triaminobenzol-carbamidsäureestern |
| JP2003515494A JP2004536142A (ja) | 2001-07-25 | 2002-07-02 | 1,2,4−トリアミノベンゾールカルバミン酸エステルの製造方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10136046.0 | 2001-07-25 | ||
| DE10136046A DE10136046A1 (de) | 2001-07-25 | 2001-07-25 | Verfahren zur Herstellung von 1,2,4-Triaminobenzol-carbamidsäureestern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003010134A1 true WO2003010134A1 (de) | 2003-02-06 |
Family
ID=7692922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2002/007301 Ceased WO2003010134A1 (de) | 2001-07-25 | 2002-07-02 | Verfahren zur herstellung von 1,2,4-triaminobenzol-carbamidsäureestern |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20030023111A1 (de) |
| EP (1) | EP1414791A1 (de) |
| JP (1) | JP2004536142A (de) |
| DE (1) | DE10136046A1 (de) |
| WO (1) | WO2003010134A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2012211487B2 (en) * | 2005-12-23 | 2013-04-04 | Cook Medical Technologies Llc | Introducer for a prosthesis |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011012659A2 (en) * | 2009-07-28 | 2011-02-03 | Medichem S.A. | Diethyl 4-(4-fluorobenzylamino)-1,2-phenylenedicarbamate, and salts thereof |
| CN101921195A (zh) * | 2010-08-02 | 2010-12-22 | 北京德众万全医药科技有限公司 | 一种瑞替加滨中间体的简单合成方法 |
| WO2013008250A2 (en) * | 2011-07-01 | 2013-01-17 | Dr.Reddys Laboratories Limited. | Crystalline form of retigabine and processes for mixture of retigabine crystalline modifications |
| CN102531966B (zh) * | 2011-12-23 | 2013-07-24 | 山东创新药物研发有限公司 | 瑞替加滨的晶型d及其制备方法 |
| CN103570587A (zh) * | 2012-08-09 | 2014-02-12 | 北京北陆药业股份有限公司 | 一种合成瑞替加滨的方法 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0554543A2 (de) * | 1992-01-08 | 1993-08-11 | ASTA Medica Aktiengesellschaft | Neue 1,2,4-Triaminobenzol-Derivate und Verfahren zu deren Herstellung |
| JPH0725831A (ja) * | 1993-07-08 | 1995-01-27 | Tokuyama Corp | ウレタンまたはカーボネート化合物の製造方法 |
| JP2001151745A (ja) * | 1999-11-29 | 2001-06-05 | Sumitomo Seika Chem Co Ltd | 3−ニトロ−2−(N−t−ブトキシカルボニル)アミノ安息香酸エステル類の製造法およびその製造中間体 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2713574A (en) * | 1951-05-24 | 1955-07-19 | American Cyanamid Co | New syntheses of peptides and substituted amides |
-
2001
- 2001-07-25 DE DE10136046A patent/DE10136046A1/de not_active Withdrawn
-
2002
- 2002-07-02 WO PCT/EP2002/007301 patent/WO2003010134A1/de not_active Ceased
- 2002-07-02 EP EP02790169A patent/EP1414791A1/de not_active Withdrawn
- 2002-07-02 JP JP2003515494A patent/JP2004536142A/ja active Pending
- 2002-07-24 US US10/201,296 patent/US20030023111A1/en not_active Abandoned
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0554543A2 (de) * | 1992-01-08 | 1993-08-11 | ASTA Medica Aktiengesellschaft | Neue 1,2,4-Triaminobenzol-Derivate und Verfahren zu deren Herstellung |
| JPH0725831A (ja) * | 1993-07-08 | 1995-01-27 | Tokuyama Corp | ウレタンまたはカーボネート化合物の製造方法 |
| JP2001151745A (ja) * | 1999-11-29 | 2001-06-05 | Sumitomo Seika Chem Co Ltd | 3−ニトロ−2−(N−t−ブトキシカルボニル)アミノ安息香酸エステル類の製造法およびその製造中間体 |
Non-Patent Citations (5)
| Title |
|---|
| DATABASE CASREACT [online] SUMITOMO SEIKA CHEMICALS CO.: "Preparation of 2-nitro-2-(N-tert-butoxycarbonyl) aminobenzoic acid esters and their intermediates", XP002217138, retrieved from STN Database accession no. 135:19447 * |
| DATABASE CASREACT [online] TOKUYAMA KK, JAPAN: "Preparation of urethanes of carbonate esters", XP002217139, retrieved from STN Database accession no. 123:8811 * |
| DATABASE EROS [online] WIley-Interscience; 2000, MICHEL WAKELSMAN, XP002217127, retrieved from HTTP://WWW.MRW.INTERSCIENCE.WILEY.COM/EROS/INDEX.H * |
| JOSEPH MUCHOWSKI ET AL: "Ortho Functionalization of N-(tert-Butoxycarbonyl)aniline", J. ORG. CHEM., vol. 45, no. 23, 1980, pages 4798 - 4801, XP002217124 * |
| LEIF GREHN AT AL: "A Simple Method for tert-Butoxycarbonylation of Amides", ACTA CHEMICA SCANDINAVICA, vol. B40, no. 9, 1986, pages 745 - 750, XP001107251 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2012211487B2 (en) * | 2005-12-23 | 2013-04-04 | Cook Medical Technologies Llc | Introducer for a prosthesis |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10136046A1 (de) | 2003-02-13 |
| EP1414791A1 (de) | 2004-05-06 |
| JP2004536142A (ja) | 2004-12-02 |
| US20030023111A1 (en) | 2003-01-30 |
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