WO1997034872A1 - Verfahren und zwischenprodukte zur herstellung von pyridyl-4-fluoranilinen - Google Patents
Verfahren und zwischenprodukte zur herstellung von pyridyl-4-fluoranilinen Download PDFInfo
- Publication number
- WO1997034872A1 WO1997034872A1 PCT/EP1997/001336 EP9701336W WO9734872A1 WO 1997034872 A1 WO1997034872 A1 WO 1997034872A1 EP 9701336 W EP9701336 W EP 9701336W WO 9734872 A1 WO9734872 A1 WO 9734872A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- formula
- compound
- compounds
- halogen
- alkyl
- Prior art date
Links
- 0 C*C(*)(C(*)(*)N(*)C1(*)*)OC1(*)*=* Chemical compound C*C(*)(C(*)(*)N(*)C1(*)*)OC1(*)*=* 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/61—Halogen atoms or nitro radicals
Definitions
- the present invention relates to N-phenylhydroxylamine compounds, a process for the preparation of these compounds and a process for converting these compounds into pyridyl-4-fluoro-aniline compounds.
- 2-pyridyl-4-fluoroaniline compounds are described in WO-A-95/02580. They correspond to Formula I.
- NH 2 and are suitable as herbicides for defoliation and desiccation. They are also useful as intermediates for the preparation of phenylpyridines, which are also described in WO-A-95/02580. These compounds are synthesized by reacting a halopyridine of the formula V with a boronic acid of the formula VI in the presence of a transition metal catalyst according to the following reaction scheme:
- Boronic acid VI is prepared by reacting the corresponding aryllithium or arylmagnesium compounds with T ⁇ alkylboraten and subsequent hydrolysis
- Fluorine-containing starting compounds are used in the first stage of the synthesis. These are generally not readily available, but must be prepared via a separate, sometimes multi-stage, synthesis. In addition, the halogen-containing compounds are expensive
- One way of producing 4-fluoroaniline compounds is to introduce the fluorine atom m into the aromatic nucleus according to the HF variant of the Bamberg reaction.
- This variant has previously been used primarily for the preparation of simple compounds, such as p-fluoroanilm, see Titov et al , Zh. Obshch. Khim 23, 346 (1953), US-A-4, 391, 991, WO-A-91/17138 and US-A-5, 166, 401.
- Pd or Pt catalysts are generally recommended for these hydrogenation reactions.
- catalyst additives in the form of dimethyl sulfoxide, divalent sulfur compounds or various organic phosphorus compounds are required (EP-A-85890, EP-A-86363, EP-A-147879, US-A- 3694509, EP-A-212375)
- phenylhydoxvlames Another method for the production of phenylhydoxvlames is the catalytic hydrogenation of nitroaromatics in the presence of organic nitrogen bases, such as piperidm, pyrrolidm, pyridine and others, which - based on the starting material - must be used in excess (DE-A-2 455 238, DE-OS 2 455 887, DE-A-2 357 370, DE-A-2 327 412).
- the yields achievable by this process are 80-85% after corresponding work-up and purification. It is disadvantageous that only relatively simple alkyl- and chloromotrobenzenes can be hydrogenated to the corresponding phenylhydroxylamines with this variant.
- the hydrogenation of more complicated systems by this method is not described.
- the object of the present invention is to provide a process for the preparation of py ⁇ dyl-substituted N-phenylhydroxylamm compounds and for the rearrangement of these compounds with pyridyl-4-fluoraniline compounds which is simple to carry out and the desired compounds with high yield and purity delivers.
- the present invention therefore relates to a process for the preparation of compounds of the formula II
- R 1 , R 3 and R 4 which may be the same or different, for hydrogen, halogen, alkyl, haloalkyl, alkoxyalkyl, alkoxy, alkoxyalkoxy, hydroxyl, haloalkoxy, alkylcarbonyloxy, haloalkylcarbonyloxy, alkylsulfonyl, haloalkylsulfonyl, C0 2 H, Alkoxycarbonyl, alkoxyalkoxycarbonyl, haloalkoxycarbonyl, alkylcarbonyl, haloalkylcarbonyl, alkoxyalkylcarbonyl C0NH 2 , alkylaminocarbonyl, dialkylaminocarbonyl, pyrrolidmylcarbonyl pipe ⁇ dmylcarbonyl, morpholinylcarbonyl, amino, alkylamino, dialkylamino, pyrrolidmyl, Pipe ⁇ dmyl, morpholinyl, amino, al
- P 5 represents halogen, hydroxyl, trifluoromethyl, alkyl or alkoxy, the process being characterized in that a compound of the general formula III
- R 1 to R 5 have the meanings given above, in the presence of a platinum catalyst or a palladium catalyst doped with sulfur or selenium and in the presence of a morpholm compound of the general formula IV
- R 6 is alkyl and R 7 to R 14 , which may be the same or a mixture, represent a hydrogen atom or an alkyl radical, are hydrogenated.
- the invention further relates to the hydroxylamm compounds of the formula II in which R 1 to R 5 have the meanings given. Finally, the invention relates to a process for the preparation of the compounds of the formula I.
- R 1 to R 5 have the meanings given above, which is characterized in that a compound of the formula II is treated with hydrogen fluoride.
- alkyl (also in combination with other atoms, groups or substituents, such as alkoxy, haloalkyl, alkylcarbonyloxy, alkylamino etc.) represents straight-chain or branched alkyl groups which preferably have 1 to 6 carbon atoms, in particular 1 to 5 carbon atoms and particularly preferably have 1 to 4 carbon atoms.
- alkyl groups are methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, n-butyl, pentyl and isopentyl.
- a haloalkyl group can have one or more, in particular 1 to 3, halogen atoms on one or more carbon atoms.
- the trifluoromethyl group is particularly preferred.
- Halogen stands for fluorine, chlorine and bromine and especially for fluorine or chlorine.
- hydroxylamine derivatives obtained as reaction products are very labile compounds which are difficult to clean and which decompose relatively quickly when exposed to temperatures> 100 ° C., it is all the more important that they are used in high quantitative conversion by the process according to the invention Purity arise, so that complex cleaning by separating the starting product and by-products, such as the corresponding anilines, azoxybenzenes and others is not required.
- the catalysts used in the process of the invention contain platinum or palladium, preferably on a carbon support. If a palladium catalyst is used, it must be doped with sulfur or selenium in order to obtain sufficient selectivity. When used according to the invention, platinum delivers Excellent results even without additional doping.
- the catalysts can be filtered off after a reaction cycle and used again in the subsequent batch without any noticeable loss of activity. In other processes with additives such as dimethyl sulfoxide, dimethylammopy ⁇ din or org.
- Working phosphorus compounds (EP-A-86363, EP-A-85890, EP-A-147879), there is usually a rapid fall in activity due to poisoning of the catalysts
- the platinum or palladium content of the catalyst is not critical and can be varied within wide limits.
- the amount of platinum or palladium used is 0.001 to 1% by weight, preferably 0.01 to 0.1% by weight, based on the nitro compound.
- the catalyst is used as Powder used.
- the presence of the morpholine compounds is of crucial importance for achieving very good yields, since these influence the activity of the catalysts in such a way that a high selectivity is achieved in the hydrogenation of nitro compounds to the hydroxylamm derivatives.
- Preferred morpholine compounds are, for example, 4-methylmorpholm, 4-ethylmorpholm, 4-propylmorpholn, 4-n-butylmorpholm, 4-isobutylmorpholm, 4-tertiarybutylmorpholine, 4-n-pentylmorpholm, 4-isopentylmorpholm 2,4,6 -T ⁇ - methylmorpholine, 2, 3, 4, 5, 6-pentamethylmorpholm and 2,2,4,6,6-pentamethylmorpholine.
- the morpholine is used in excess, i.e. the weight ratio of morpholine to the nitro compound is greater than 1.
- the temperature for the partial hydrogenation is generally in the range from - 20 ° C to + 100 ° C, preferably - 5 to + 50 ° C.
- a pressure is set at the temperature at which the hydrogenation proceeds sufficiently quickly, which is between normal pressure and 10 bar overpressure.
- the hydrogen is outgassed at normal pressure or slightly elevated pressure in the hydrogenation reactor.
- the hydrogenation is preferably carried out without further solvents or diluents, such as, for example, alcohols or ethers
- the rearrangement of the hydroxylamm compounds obtained into the desired pyridyl-4-fluoroaniline compounds is carried out by treatment with anhydrous hydrogen fluoride.
- the reactants are used in such quantities that the molar ratio of hydrogen fluoride to the compound of the formula II is preferably in Ranges from 10 to 50 and in particular in the range from 20 to 30.
- the desired amount of hydrogen fluoride is introduced and the hydroxylamine is slowly added.
- the hydroxylamine is preferably introduced as a solid. If the reaction partners are brought into contact in the reverse order, the product is obtained in poorer yield and less purity.
- the hydroxylamine is added at a temperature in the range from -70 to 0.degree. C., in particular from -40 to -20.degree. After the addition has ended, the temperature is allowed to rise, possibly using the heat of reaction, until reflux conditions are present.
- Atmospheric oxygen is excluded by working under inert gas, such as nitrogen or argon. d) The reaction is carried out without organic solvents
- the reaction time depends on the reaction temperature and the starting materials. It is generally between 5 and 24 hours
- the work-up is carried out in the customary manner. It has proven to be expedient to expel the hydrogen fluoride as much as possible by heating and passing nitrogen through.
- the residue is then taken up in an inert organic solvent, for example a chlorinated solvent such as dichloromethane or an ether such as diethyl ether. Water is added and the mixture is made alkaline in order to liberate the amine base, which is then mixed with a suitable inert Solvent, such as diethyl ether or dichloromethane, is extracted. If necessary, cleaning can be carried out using customary methods, such as recrystallization and chromatography.
- the reaction product was filtered off over animal charcoal, the filtrate was evaporated under reduced pressure at a bath temperature of max. 60 ° C. 100 g of high-boiling gasoline (180-210 ° C.) were added to the remaining residue, and the gasoline / N-methylmorpholm mixture was fractionally distilled off using a Vigreux column (bp. 28-30 ° C. at 0.5 mbar) . The crystals precipitated in the distillation sump were filtered off, washed with n-hexane and dried.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pyridine Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/142,767 US6031106A (en) | 1996-03-18 | 1997-03-17 | Process and intermediate products for preparing pyridyl-4-fluoroanilines |
DE59700696T DE59700696D1 (de) | 1996-03-18 | 1997-03-17 | Verfahren und zwischenprodukte zur herstellung von pyridyl-4-fluoranilinen |
AU22882/97A AU2288297A (en) | 1996-03-18 | 1997-03-17 | Process and intermediate products for preparing pyridyl-4-fluoroanilines |
JP9533140A JP2000506875A (ja) | 1996-03-18 | 1997-03-17 | ピリジル―4―フルオルアニリン製造のための中間生成物およびその製法 |
EP97915376A EP0888305B1 (de) | 1996-03-18 | 1997-03-17 | Verfahren und zwischenprodukte zur herstellung von pyridyl-4-fluoranilinen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19610571.4 | 1996-03-18 | ||
DE19610571A DE19610571A1 (de) | 1996-03-18 | 1996-03-18 | Verfahren und Zwischenprodukte zur Herstellung von Pyridyl-4-Fluoranilinen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997034872A1 true WO1997034872A1 (de) | 1997-09-25 |
Family
ID=7788617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/001336 WO1997034872A1 (de) | 1996-03-18 | 1997-03-17 | Verfahren und zwischenprodukte zur herstellung von pyridyl-4-fluoranilinen |
Country Status (7)
Country | Link |
---|---|
US (1) | US6031106A (de) |
EP (1) | EP0888305B1 (de) |
JP (1) | JP2000506875A (de) |
AU (1) | AU2288297A (de) |
DE (2) | DE19610571A1 (de) |
TW (1) | TW430654B (de) |
WO (1) | WO1997034872A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19633746A1 (de) | 1996-08-22 | 1998-02-26 | Basf Ag | Substituierte 2-Phenylpyridine |
CA2424292A1 (en) | 2000-10-10 | 2002-04-18 | Calyx Therapeutics, Inc. | Tricyclic compounds and uses thereof |
EP1593668A4 (de) * | 2003-02-14 | 2007-07-11 | Wako Pure Chem Ind Ltd | Verfahren zur herstellung einer hydroxylaminverbindung unter verwendung eines auf einem ionenaustauscherharz immobilisierten platinkatalaysators |
EP2154125A4 (de) * | 2007-03-27 | 2012-02-22 | Wako Pure Chem Ind Ltd | Verfahren zur herstellung von arylhydroxylamin |
CN103472951B (zh) | 2013-09-13 | 2016-10-05 | 京东方科技集团股份有限公司 | 一种触摸屏及其制作方法、显示装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1945625A1 (de) * | 1968-09-09 | 1970-03-26 | Olin Mathieson | Verfahren zur Herstellung von Fluoranilinen |
DE2455238A1 (de) * | 1973-11-21 | 1975-05-22 | Rhone Poulenc Sa | Verfahren zur herstellung aromatischer hydroxylamine durch hydrierung aromatischer nitroderivate |
DE4323916A1 (de) * | 1993-07-16 | 1995-01-19 | Basf Ag | Substituierte 2-Phenylpyridine |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2884458A (en) * | 1957-03-15 | 1959-04-28 | Olin Mathieson | Process for preparing parafluoroaniline |
US3580951A (en) * | 1969-01-10 | 1971-05-25 | Olin Mathieson | Preparation of fluoroanilines |
US3694509A (en) * | 1970-04-16 | 1972-09-26 | Engelhard Min & Chem | Selective hydrogenation of nitroaromatics to the corresponding n-arylhydroxylamine |
FR2186963A5 (de) * | 1972-05-29 | 1974-01-11 | Rhone Poulenc Sa | |
FR2206756A5 (de) * | 1972-11-16 | 1974-06-07 | Rhone Poulenc Sa | |
US3927101A (en) * | 1973-05-29 | 1975-12-16 | Rhone Poulenc Sa | Process for the preparation of hydroxylamines by hydrogenation of aromatic nitro derivatives |
FR2252337B1 (de) * | 1973-11-26 | 1976-10-01 | Rhone Poulenc Ind | |
US4391991A (en) * | 1981-10-29 | 1983-07-05 | Occidental Chemical Corporation | Process for the preparation of para-fluoroaniline |
ZA83304B (en) * | 1982-01-29 | 1983-10-26 | Mallinckrodt Inc | Process for the preparation of arylhydroxylamines |
US4415753A (en) * | 1982-01-29 | 1983-11-15 | Mallinckrodt, Inc. | Process for preparing p-aminophenol and alkyl substituted p-aminophenol |
EP0147879B1 (de) * | 1983-12-06 | 1987-12-16 | Akzo N.V. | Verfahren zur Herstellung von Hydroxylaminen |
US4723030A (en) * | 1985-08-05 | 1988-02-02 | General Electric Company | Moderated reduction reactions for producing arylhydroxylamines |
GB9005839D0 (en) * | 1990-03-15 | 1990-05-09 | Ici Plc | Preparation of fluoroanilines |
EP0527154A1 (de) * | 1990-05-01 | 1993-02-17 | Pfizer Hospital Products Group, Inc. | Verfahren zur herstellung von 3,4-difluoranilin |
US5166401A (en) * | 1991-06-25 | 1992-11-24 | Pfizer Inc | Intermediates for 5-fluoro-6-chlorooxindole |
DE19502700A1 (de) * | 1995-01-28 | 1996-08-01 | Basf Ag | Verfahren zur Herstellung von N-Aryl- und N-Hetarylhydroxylaminen |
-
1996
- 1996-03-18 DE DE19610571A patent/DE19610571A1/de not_active Withdrawn
-
1997
- 1997-03-14 TW TW086103164A patent/TW430654B/zh active
- 1997-03-17 DE DE59700696T patent/DE59700696D1/de not_active Expired - Lifetime
- 1997-03-17 JP JP9533140A patent/JP2000506875A/ja active Pending
- 1997-03-17 US US09/142,767 patent/US6031106A/en not_active Expired - Fee Related
- 1997-03-17 WO PCT/EP1997/001336 patent/WO1997034872A1/de active IP Right Grant
- 1997-03-17 AU AU22882/97A patent/AU2288297A/en not_active Abandoned
- 1997-03-17 EP EP97915376A patent/EP0888305B1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1945625A1 (de) * | 1968-09-09 | 1970-03-26 | Olin Mathieson | Verfahren zur Herstellung von Fluoranilinen |
DE2455238A1 (de) * | 1973-11-21 | 1975-05-22 | Rhone Poulenc Sa | Verfahren zur herstellung aromatischer hydroxylamine durch hydrierung aromatischer nitroderivate |
DE4323916A1 (de) * | 1993-07-16 | 1995-01-19 | Basf Ag | Substituierte 2-Phenylpyridine |
WO1995002580A2 (en) * | 1993-07-16 | 1995-01-26 | Basf Aktiengesellschaft | Substituted 2-phenylpyridines with herbicidal action |
Non-Patent Citations (1)
Title |
---|
T.B. PATRICK ET AL.: "Synthesis of fluoroaromatic amines.", JOURNAL OF ORGANIC CHEMISTRY, vol. 39, no. 12, 1974, EASTON US, pages 1758 - 1761, XP002034217 * |
Also Published As
Publication number | Publication date |
---|---|
AU2288297A (en) | 1997-10-10 |
US6031106A (en) | 2000-02-29 |
EP0888305A1 (de) | 1999-01-07 |
DE19610571A1 (de) | 1997-09-25 |
EP0888305B1 (de) | 1999-11-10 |
DE59700696D1 (de) | 1999-12-16 |
JP2000506875A (ja) | 2000-06-06 |
TW430654B (en) | 2001-04-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69728494T2 (de) | Verfahren zur Herstellung von aromatischen Halogeno-Amino Verbindungen | |
EP0805797B1 (de) | Verfahren zur herstellung von n-aryl- und n-hetarylhydroxylaminen | |
DE69114867T2 (de) | Verfahren zur Herstellung aromatischer Urethane. | |
DE3514450A1 (de) | Verfahren zur herstellung von imidaten sowie neue arylsubstituierte imidate | |
DE102004033525A1 (de) | Verbessertes Verfahren zur Herstellung kernfluorierter Aromaten | |
EP0888305B1 (de) | Verfahren und zwischenprodukte zur herstellung von pyridyl-4-fluoranilinen | |
DE2434549A1 (de) | Verfahren zur herstellung des suesstoffes 6-methyl-3,4-dihydro-1,2,3-oxathiazin4-on-2,2-dioxid | |
DE60010682T2 (de) | Verfahren zur herstellung von zwischenprodukten für pestizide | |
EP0453885A2 (de) | Verfahren zur Herstellung aromatischer Amine | |
DE4000610A1 (de) | Verfahren zur herstellung von optisch aktiven 3-amino-1-arylbutanen und 3-benzylamino-1-arylbutanen | |
DE2804263C3 (de) | Verfahren zur Herstellung von Indolin-Derivaten | |
EP0065668B1 (de) | Harnstoffderivate, ihre Herstellung und Verwendung | |
EP0173202B1 (de) | Verfahren zur Herstellung von Chlor-o-nitroanilinen | |
DE3104310A1 (de) | Verfahren zur herstellung von 5-chlor-2-nitroanilin | |
DE19835866B4 (de) | Verfahren zur Herstellung von 5-Perfluoralkyluracilderivaten | |
DE4334432A1 (de) | Verfahren zur Herstellung von 5-Fluoranthranilsäurealkylestern und/oder 5-Fluoranthranilsäure | |
DE69819504T2 (de) | Verfahren zur herstellung von 2-alkylthiobenzonitril-derivaten | |
EP0601138B1 (de) | Verfahren zur herstellung von 5-alkoxy-2,4-dinitroalkylbenzolen | |
EP0133663B1 (de) | Neue Pyrimidine und ein Verfahren zur Herstellung von Pyrimidinen | |
EP0177448B1 (de) | Verfahren zur Herstellung von 1,2-Benzoxathiin-Derivaten | |
DE60207966T2 (de) | Verfahren für die selektive Zersetzung von Hydrazin/substituiertem Hydrazin/Wasser | |
DE69924702T2 (de) | Difluormethoxybenzolderivate und ihre verwendung als zwischenprodukte | |
DE1932937C (de) | Verfahren zur Herstellung von Tnalkenyl isoeyanuraten | |
EP0483061B1 (de) | Verfahren zur Herstellung von (3-Fluor-pyridin-2-yloxy)-phenoxy-propionsäuren | |
DE69730111T2 (de) | Verfahren zur Herstellung von 3-(N,N-Dimethylamino)-benzoesäure |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AU CA CN HU IL JP KR MX US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 09142767 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1997915376 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1997915376 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: CA |
|
WWG | Wipo information: grant in national office |
Ref document number: 1997915376 Country of ref document: EP |