WO2008006576A1 - Verfahren zum herstellen von in 1'-stellung unverzweigten alkenylnitrobenzol-derivaten - Google Patents
Verfahren zum herstellen von in 1'-stellung unverzweigten alkenylnitrobenzol-derivaten Download PDFInfo
- Publication number
- WO2008006576A1 WO2008006576A1 PCT/EP2007/006178 EP2007006178W WO2008006576A1 WO 2008006576 A1 WO2008006576 A1 WO 2008006576A1 EP 2007006178 W EP2007006178 W EP 2007006178W WO 2008006576 A1 WO2008006576 A1 WO 2008006576A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- formula
- alkyl
- halogen
- alkenylnitrobenzenes
- cyclopropyl
- 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 CC1(C=CC([N+]([O-])=O)=C(C=C*)C=C1)I Chemical compound CC1(C=CC([N+]([O-])=O)=C(C=C*)C=C1)I 0.000 description 2
- FGHCUWCPVXWMCG-UHFFFAOYSA-N CC1(C)C=CC([N+]([O-])=O)=C(C)C=C1 Chemical compound CC1(C)C=CC([N+]([O-])=O)=C(C)C=C1 FGHCUWCPVXWMCG-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
- C07C205/07—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms
- C07C205/08—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms having nitro groups bound to acyclic carbon atoms
- C07C205/09—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms having nitro groups bound to acyclic carbon atoms of an unsaturated carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
- C07C205/13—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by hydroxy groups
- C07C205/19—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by hydroxy groups having nitro groups bound to carbon atoms of six-membered aromatic rings and hydroxy groups bound to acyclic carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
- C07C205/13—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by hydroxy groups
- C07C205/26—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by hydroxy groups and being further substituted by halogen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
- C07C205/27—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by etherified hydroxy groups
- C07C205/34—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by etherified hydroxy groups having nitro groups bound to carbon atoms of six-membered aromatic rings and etherified hydroxy groups bound to acyclic carbon atoms of the carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/02—Systems containing only non-condensed rings with a three-membered ring
Definitions
- the present invention relates to a process for the preparation of alkenylnitrobenzene derivatives which are important as intermediates for fungicidally effective alkylanilides.
- Alkyl nitrobenzenes can be converted to alkylanilines by reduction of the nitro group and have hitherto been used e.g. by the nitration of alkylaromatics as described in EP-A-824099 and WO-A-03074491 or by reaction of nitrobenzene derivatives with Grignard reagents described in J. Org. Chem. 1980, 45, 522.
- nitro groups can give rise to a variety of redox by-products in the presence of Grignard reactions.
- JP-A-62-202091 describes the reaction of isobutyraldehyde with 2-nitrotoluene to give only 2.2% of 2- (2-nitrophenyl) -1-isopropylethanol.
- Alkylnitrobenzenes to provide that does not have the disadvantages associated with the prior art.
- the present invention therefore provides a process for preparing alkenylnitrobenzenes of the formula (I)
- R 1 is hydrogen, halogen, -CR '(CF 3 ) 2 , wherein R' is selected from H, F or 0-C 1-4 alkyl and more preferably is hydrogen
- R 2 is cyclopropyl or t-butyl
- R 2 has the above meaning, to Hydroxalkylnitrobenzolen the formula (FV);
- R 1 and R 2 have the above meanings and X is a halogen atom or a leaving group such as tosylate (OTos), mesylate (OMes) or OSOCl,
- R 1 is halogen or -CR '(CF 3 ) 2 and R' is selected from H, F or OC M alkyl and more preferably is hydrogen and
- R 2 is t-butyl or cyclopropyl
- the substituent R 1 is preferably in the meta or para position, more preferably in the 4 position (para to the NO 2 group) of the aromatic;
- R 1 is hydrogen, halogen, -CR '(CF 3 ) 2 and R' is selected from H, F or 0-C 1-4 -
- Alkyl and particularly preferably is hydrogen and - A -
- R is cyclopropyl or t-butyl
- the substituent R 1 is preferably in the meta or para position, more preferably in the A (para to N ⁇ 2 ) position of the aromatic;
- R 1 is halogen, -CR '(CF 3 ) 2 and R' is selected from H, F or 0-C 1-4 -alkyl and the substituent R 1 is preferably in the meta or para position, more preferably in 4- position (para) of the aromatic is located;
- R 1 is hydrogen, halogen, -CR '(CF 3 ) 2 and R' is selected from H, F or OC M - alkyl) and is particularly preferably hydrogen,
- R 2 is cyclopropyl or t-butyl
- X represents a halogen atom, preferably Cl or Br or a leaving group such as tosylate (OTos), mesylate (OMes) or OSOCl, and
- the substituent R 1 is preferably in the meta or para position, more preferably in the A (para) position of the aromatic.
- halogens includes elements selected from the group consisting of chlorine, bromine and iodine, chlorine and bromine being preferred, and chlorine being particularly preferably used.
- Optionally substituted radicals may be monosubstituted or polysubstituted, wherein Multiple substituents, the substituents may be the same or different.
- Ci-Gj-alkyl includes the largest range defined herein for an alkyl radical. In detail, this definition includes the meanings methyl, ethyl, n-, iso-propyl, n-, iso-, sec- and t-butyl.
- the compounds of the invention may be prepared as mixtures of various possible isomeric forms, particularly stereoisomers, e.g. E and Z, threo and erythro, as well as optical isomers, but optionally also of tautomers. Both the E and the Z isomers, as well as the threo and erythro, and the optical isomers, any mixtures of these isomers, as well as the possible tautomeric forms claimed.
- the erf ⁇ ndungshiele reaction of the 2-nitrotoluenes with the aldehydes according to step (i) is preferably carried out in the presence of a base.
- Bases in question which are selected from the group consisting of alkali and alkaline earth metal hydroxides, carbonates and hydrides, wherein alkali metal hydroxides are preferred and NaOH or KOH are particularly preferably used.
- Suitable solvents are all among the predominant reactants in the inert solvent, with dimethylformamide (DMF), dimethylacetamide, N-methylpyrrolidone (NMP), dimethyl sulfoxide (DMSO) and dimethylene propyl urea (DMPU) being preferred.
- DMF dimethylformamide
- NMP N-methylpyrrolidone
- DMSO dimethyl sulfoxide
- DMPU dimethylene propyl urea
- the halogenation of the alcohol (IV) to the halide (V) according to step (ii) is preferably carried out with a halide former selected from the group of acid chlorides such as thionyl chloride (SOCl 2 ), POCl 3 , COCl 2 and (COCl) 2 .
- a halide former selected from the group of acid chlorides such as thionyl chloride (SOCl 2 ), POCl 3 , COCl 2 and (COCl) 2 .
- step (iii) the elimination of the haloalkylnitrobenzenes of the formula (V) according to step (iii) is carried out base-catalyzed or thermally.
- bases which, e.g. are selected from the group consisting of amines such as diethylamine,
- Diazabicyclo [2.2.2] octane (DABCO); Alcoholates such as sodium methoxide, potassium t-butylate;
- Alkali and alkaline earth hydroxides such as KOH, NaOH, LiOH, Ca (OH) 2 ; or carbonates like soda, potash.
- the base-catalyzed elimination takes place according to the invention at atmospheric pressure and temperatures in the range from -10 to 190 ° C., preferably 0 to 140 ° C., particularly preferably 10 to 100 ° C.
- the elimination can also be carried out thermally spontaneously during the reaction with the halide former, as shown in Scheme III below:
- the direct elimination of the Hydroxyalkylnitrobenzole of formula (FV) according to step (iv) is acid-catalyzed or thermally.
- acids are used which are selected from the group consisting of mineral acids such as hydrochloric acid, sulfuric acid, phosphoric acid, acidic ion exchangers, organic acids such as methanesulfonic acid, benzenesulfonic acid, p-toluenesulfonic acid (PTSA), trifluoroacetic acid and acetic acid, wherein p-toluenesulfonic acid and sulfuric acid are particularly preferably used.
- mineral acids such as hydrochloric acid, sulfuric acid, phosphoric acid, acidic ion exchangers
- organic acids such as methanesulfonic acid, benzenesulfonic acid, p-toluenesulfonic acid (PTSA), trifluoroacetic acid and acetic acid, wherein p-toluenesulfonic acid and sulfuric acid are particularly preferably used.
- the acid-catalyzed elimination is carried out according to the invention at atmospheric pressure and temperatures in the range of 0 to 200 0 C, preferably from 20 to 150 ° C.
- Both the acid-catalyzed and the thermal elimination reaction are preferably carried out while simultaneously distilling off the water liberated in the reaction.
- reaction may be carried out in the presence of a water-binding agent, e.g. an acid anhydride such as acetic anhydride.
- a water-binding agent e.g. an acid anhydride such as acetic anhydride.
- Suitable solvents for dehydration are e.g. selected from the group consisting of aromatics such as toluene, xylene, benzene, chlorobenzene, dichlorobenzene; Aliphatic compounds such as hexane, heptane, cyclohexane, methylcyclohexane and petroleum ether.
- the thermal elimination is carried out according to the invention at atmospheric pressure and temperatures in the range of 40 to 200 0 C, preferably 50 to 150 0 C.
- the resulting 2-alkenyl-nitrobenzenes according to the formula (I) are valuable intermediates for the preparation of active ingredients and can be converted by reduction into 2-alkylanilines.
- the cyclopropanation is carried out by Simmons-Smith reaction with dihalomethane and zinc and / or copper or diethylzinc.
- the reaction conditions of the cyclopropanation are known to those skilled in the art and in the prior art, for example in Org. React. 1973, 2O 5 pp. 1-131.
- the cyclopropanation can also be carried out by carbene addition with diazomethane.
- the reaction conditions of the hydrogenation are known in the art and in the prior art, for. In Becker, HGD et al., Organikum (1976), Interdruck, Leipzig.
- the hydrogenation in the liquid and / or gas phase is particularly preferably carried out in the presence of suitable hydrogenation catalysts.
- suitable hydrogenation catalysts Pd / C, PtO 2 and Raney nickel are suitable as catalysts.
- the hydrogenation is usually carried out with hydrogen pressures of 1 to 100 bar, preferably 2 to 30 bar, more preferably 5 to 10 bar and at temperatures in the range of 0 to 150 0 C, preferably 10 to 100 0 C and particularly preferably 15 to 50 0 C. carried out.
- the hydrogenation can be carried out with hydrogenation reagents selected from Zn, Fe, SnCl 2 , Sn and dithionite.
- the hydrogenation can be carried out in the presence of an acid.
- Suitable sources of hydrogen are also formates and hydrazine.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07786010A EP2043995B1 (de) | 2006-07-14 | 2007-07-12 | Verfahren zum herstellen von in 1'-stellung unverzweigten alkenylnitrobenzol-derivaten |
| ES07786010T ES2399660T3 (es) | 2006-07-14 | 2007-07-12 | Procedimiento para la preparación de derivados de alquenilnitrobenceno no ramificados en la posición 1' |
| CN200780026365XA CN101489976B (zh) | 2006-07-14 | 2007-07-12 | 一种制备1' 位无支链的烯基硝基苯衍生物的方法 |
| BRPI0714412-1A BRPI0714412A2 (pt) | 2006-07-14 | 2007-07-12 | processo para preparar derivados de alquenilnitrobenzeno nço-ramificados na posiÇço 1 |
| PL07786010T PL2043995T3 (pl) | 2006-07-14 | 2007-07-12 | Sposób wytwarzania pochodnych alkenylonitrobenzolu, nierozgałęzionych w pozycji 1’ |
| US12/373,255 US8071824B2 (en) | 2006-07-14 | 2007-07-12 | Method for producing alkenylnitrobenzene derivatives unbranched in the 1′-position |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006033092.7 | 2006-07-14 | ||
| DE102006033092A DE102006033092A1 (de) | 2006-07-14 | 2006-07-14 | Verfahren zum Herstellen von in 1'-Stellung unverzweigten Alkylnitrobenzolen und Alkylanilinen aus Nitrotoluolen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008006576A1 true WO2008006576A1 (de) | 2008-01-17 |
Family
ID=38578666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2007/006178 Ceased WO2008006576A1 (de) | 2006-07-14 | 2007-07-12 | Verfahren zum herstellen von in 1'-stellung unverzweigten alkenylnitrobenzol-derivaten |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US8071824B2 (de) |
| EP (1) | EP2043995B1 (de) |
| CN (1) | CN101489976B (de) |
| BR (1) | BRPI0714412A2 (de) |
| DE (1) | DE102006033092A1 (de) |
| ES (1) | ES2399660T3 (de) |
| PL (1) | PL2043995T3 (de) |
| WO (1) | WO2008006576A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9375004B2 (en) | 2010-11-15 | 2016-06-28 | Bayer Intellectual Property Gmbh | 5-halogenopyrazolecarboxamides |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4059459B1 (de) | 2010-10-25 | 2025-12-03 | Medtronic Ireland Manufacturing Unlimited Company | Mikrowellenkathetervorrichtungen für nierennervenmodulation |
| EP2662364A1 (de) | 2012-05-09 | 2013-11-13 | Bayer CropScience AG | Pyrazol-Tetrahydronaphthyl-Carboxamide |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003074491A1 (en) * | 2002-03-05 | 2003-09-12 | Syngenta Participations Ag | O-cyclopropyl-carboxanilides and their use as fungicides |
| WO2006087221A1 (en) * | 2005-02-21 | 2006-08-24 | Syngenta Participations Ag | Process for the production of nitrobenzoles |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5914344A (en) | 1996-08-15 | 1999-06-22 | Mitsui Chemicals, Inc. | Substituted carboxanilide derivative and plant disease control agent comprising same as active ingredient |
| UA86284C2 (uk) | 2004-12-10 | 2009-04-10 | Сингента Партисипэйшнс Аг | Спосіб одержання анілінів, застосування аміаку в цьому способі та спосіб амінування |
-
2006
- 2006-07-14 DE DE102006033092A patent/DE102006033092A1/de not_active Withdrawn
-
2007
- 2007-07-12 WO PCT/EP2007/006178 patent/WO2008006576A1/de not_active Ceased
- 2007-07-12 EP EP07786010A patent/EP2043995B1/de not_active Not-in-force
- 2007-07-12 US US12/373,255 patent/US8071824B2/en not_active Expired - Fee Related
- 2007-07-12 CN CN200780026365XA patent/CN101489976B/zh not_active Expired - Fee Related
- 2007-07-12 PL PL07786010T patent/PL2043995T3/pl unknown
- 2007-07-12 BR BRPI0714412-1A patent/BRPI0714412A2/pt not_active Application Discontinuation
- 2007-07-12 ES ES07786010T patent/ES2399660T3/es active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003074491A1 (en) * | 2002-03-05 | 2003-09-12 | Syngenta Participations Ag | O-cyclopropyl-carboxanilides and their use as fungicides |
| WO2006087221A1 (en) * | 2005-02-21 | 2006-08-24 | Syngenta Participations Ag | Process for the production of nitrobenzoles |
Non-Patent Citations (1)
| Title |
|---|
| SHIGERU MURATA ET.AL.: "Mechanistic studies of intramolecular CH insertion reaction of arylnitrenes: isotope effect, configurational purity and radical clock studies", J. OF PHYSICAL ORGANIC CHEM., vol. 18, 2005, pages 9 - 20, XP002455705 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9375004B2 (en) | 2010-11-15 | 2016-06-28 | Bayer Intellectual Property Gmbh | 5-halogenopyrazolecarboxamides |
Also Published As
| Publication number | Publication date |
|---|---|
| US8071824B2 (en) | 2011-12-06 |
| DE102006033092A1 (de) | 2008-01-24 |
| CN101489976A (zh) | 2009-07-22 |
| EP2043995B1 (de) | 2013-01-02 |
| EP2043995A1 (de) | 2009-04-08 |
| CN101489976B (zh) | 2013-07-24 |
| PL2043995T3 (pl) | 2013-05-31 |
| BRPI0714412A2 (pt) | 2013-03-26 |
| US20100076229A1 (en) | 2010-03-25 |
| ES2399660T3 (es) | 2013-04-02 |
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