ZA200007286B - Method for producing isoxazoline-3-yl-acyl benzene. - Google Patents

Method for producing isoxazoline-3-yl-acyl benzene. Download PDF

Info

Publication number
ZA200007286B
ZA200007286B ZA200007286A ZA200007286A ZA200007286B ZA 200007286 B ZA200007286 B ZA 200007286B ZA 200007286 A ZA200007286 A ZA 200007286A ZA 200007286 A ZA200007286 A ZA 200007286A ZA 200007286 B ZA200007286 B ZA 200007286B
Authority
ZA
South Africa
Prior art keywords
formula
alkyl
compound
compounds
hydrogen
Prior art date
Application number
ZA200007286A
Inventor
Joachim Rheinheimer
Wolfgang Von Deyn
Joachim Gebhardt
Michael Rack
Rene Lochtman
Norbert Goetz
Michael Keil
Matthias Witschel
Helmut Hagen
Ulf Misslitz
Ernst Baumann
Original Assignee
Basf Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Basf Ag filed Critical Basf Ag
Publication of ZA200007286B publication Critical patent/ZA200007286B/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C1/00Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D231/00Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
    • C07D231/02Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
    • C07D231/10Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D231/14Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members 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
    • C07D231/18One oxygen or sulfur atom
    • C07D231/20One oxygen atom attached in position 3 or 5
    • C07D231/22One oxygen atom attached in position 3 or 5 with aryl radicals attached to ring nitrogen atoms
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D413/00Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
    • C07D413/02Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
    • C07D413/10Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings linked by a carbon chain containing aromatic rings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Description

g 0050749012 AMENDED SHEET
Preparation of isoxazolin-3-ylacylbenzenes
The present invention provides a process for .preparing isoxazolin-3-ylacylbenzenes, novel intermediates and novel processes for preparing these intermediates.
Isoxazolin-3-ylacylbenzenes are useful compounds which can be used in the field of crop protection. WO 98/31681, for example, describes 2-alkyl-3-(4,5-dihydroisoxazol-3-yl)acylbenzenes as herbicidally active compounds.
A need exists to provide an alternative process for preparing 3- heterocyclyl-substituted benzoyl derivatives. The preparation process described in WO 98/31681 for 2-alkyl-3-(4,5- dihydroisoxazol-3-yl)acylbenzenes or precursors thereof (2-alkyl- 3-(4,5-dihydroisoxazol-3-yl) bromobenzene derivatives) is not particularly suitable for the industrial preparation of these compounds, since the synthesis involves a plurality of steps and the yield of the end product in question, based on the starting materials employed in the first step of the synthesis, is relatively low.
The preparation of compounds or intermediates with a structure similar to that of the compounds of the formula I is known from the literature:
WO 96/26206 discloses a process for preparing 4-[3~(4,5-dihydroisoxazol-3-~yl)benzoyl]-5-hydroxypyrazoles where, in the last step, a 5-hydroxypyrazole is reacted with a 3-(4,5-dihydroisoxazol-3-yl)benzoic acid derivative. The 3-(4,5-dihydroisoxazol-3-yl)benzoic acid derivative required for this process can only be obtained with difficulty, via a large number of steps. Accordingly, the process is relatively expensive - and not optimal economically.
DE 197 09 118 describes a process for preparing 3-(4,5-dihydroisoxazol-3-yl)benzoic acids starting from 40 3-bromo-(4,5-dihydroisoxazol-3-yl)benzene, Grignard reagents and carbon dioxide.
Surprisingly, we have found that the number of process steps in the preparation of the 3-heterocyclyl-substituted benzoyl 45 derivatives can be reduced compared to the process described in
WO 98/31681 if the synthesis is carried out via selected intermediates. Moreover, the process according to the invention
. 0050/49012 AMENDED SHEET © @ 2 ) has the advantage that the overall yield of the end products of the formula I and also that of the intermediates X, based on the starting materials employed, is higher than the yield of the processes described in WO 98/31681. Furthermore, the respective ] 5 intermediates of the individual process steps can be obtained in good yield. Moreover, some of the individual process steps are advantageous for the industrial preparation of the intermediates, since they allow a cost-effective and economic preparation of the latter. Furthermore, it is advantageous that the starting materials used are basic chemicals which are easy to prepare and which can be obtained from several independent suppliers of raw materials, even in relatively large amounts. Overall, the process according to the invention provides a more cost-effective, economical and safe industrial process for preparing herbicidally active compounds of the formula I.
The present invention provides a process for preparing compounds of the formula I
R® 4 o R 4 S
R! S(0) R? I . R®
Oo where the substituents are as defined below:
R! is hydrogen, C,-Cg~alkyl,
R2 is C;-Cg-alkyl,
R3, R4, RS are hydrogen, C;-Cg-alkyl, or R? and RS together form a bond,
R6 is a heterocyclic ring, n is 0, 1 or 2; 40 which comprises preparing an intermediate of the formula VI
0050/49012
Rr? 4 0 R /
N NN R®
VI
R: NH, in which R! and R3 - R35 are as defined above.
In subsequent reaction steps, compounds of the formula VI are converted into the corresponding 3-bromo-substituted compounds : (bromobenzene derivatives), and the amino group on the phenyl ring is transformed into a sulfonyl group, giving compounds of the formula X:
Rr? 4 o R / 5
R! S(0) R® X
Br
The compounds of the formula X (3-(4,5-dihydroisoxazol-3- yl)bromobenzenes) are useful intermediates for preparing active compounds of the formula I. In particular, the process according to the invention affords the compounds I in the last reaction step in good yield. The compounds I are suitable, for example, for use as crop protection agents, in particular as herbicides, as described in WO 96/26206 and WO 97/35850.
According to the invention, the compounds of the formula I and the required intermediates, in particular compounds of the 40 formula VI or X, can be prepared advantageously by combining one or more of the following process steps a) - g):
’ 0050/49012 07 ® 20007286 ) a) reaction of a nitro-o-methylphenyl compound of the formula II
CH, 1
Or - in which the radical R! is as defined above with an organic nitrite R-ONO in the presence of a base to give an oxime of the formula III
OH
N
NX
R? NO, 111 in which the radical Rl! is as defined above; b) cyclization of the oxime of the formula III with an alkene of the formula IV
RY R°®
N=/ Iv
R* in which R3 to R5 are as defined in claim 1 in the presence of a base to give the isoxazole of the formula V
R® 4 o R / 5
NNR
\Y
R? NO, 40
0050/49012 ® 20007286 i 5 : in which R! and R3 to R5 are as defined in claim 1; c) reduction of the nitro group in the presence of a catalyst to give the aniline of the formula VI
Rr? 4 0 R
N .
NN R
VI
R' NH, in which R! and R3 to R5 are as defined in claim 1; : d) reaction of the aniline of the formula VI with a dialkyl disulfide of the formula VII
RZ—Ss—Ss—R’ VII in the presence of an organic nitrite R-ONO and, if appropriate, a catalyst to give the thioether of the formula
VIII
R* 0 /
N NN R®
VIII
R! SR’ in which R! to R5 are as defined in claim 1; 40

Claims (1)

  1. . . 0050/49012 AMENDED SHEET @® 52 CLAIMS
    1. A process for preparing isoxazoles of the formula I
    5 . Rr? e 0 R / 5 NNR R S(0),R’® : R® 0) where the substituents are as defined below: Rl is hydrogen, C;-Cg-alkyl, . R2 is C;-Cg-alkyl, To 20 R3, R4, R5 are hydrogen, C;-Cg-alkyl, or R? and R5 together form a bond, RE is a heterocyclic ring, n is 0, 1 or 2; which comprises preparing an intermediate of the formula VI R® 4 o R / C NR vI RY NH, where R!, R3, RY and R53 are as defined above, and subsequent reaction to give compounds of the formula I.
    2. A process as claimed in claim 1, comprising one or more of 40 the following process steps: a) reaction of a nitro-o-methylphenyl compound of the formula II
    ; 0050/49012 AMENDED SHEET CH, R" om II
    5 . . in which the radical R! is as defined above with an organic nitrite R-ONO in the presence of a base to give an oxime of the formula III OH Na R' NO, III in which the radical R! is as defined above; b) cyclization of the oxime of the formula III with an . alkene of the formula IV RR R® N=’ Iv 4 R in which R3 to RS are as defined in claim 1 in the presence of a base to give the 4,5-dihydroisoxazole of the formula V
    R® . 0 R / S Vv t R NO, 40 in which R! and R3 to R35 are as defined in claim 1; Cc) reduction of the nitro group in the presence of a catalyst to give the aniline of the formula VI
    ] 0050/4%012 AMENDED SHEET
    Rr? 4 o R / 5 N \N = R VI R NH,
    in which R! and R3 to RS are as defined in claim 1; d) reaction of the aniline of the formula VI with a dialkyl disulfide of the formula VII
    RiX—Ss—s-R* VII in the presence of an organic nitrite and, if appropriate, a catalyst to give the thioether of the formula VIII Rr 4 o R / NN R® .25% VIII R: SR?
    in which R! to R53 are as defined in claim 1; ] e) bromination of the thioether of the formula VIII with a brominating agent to give the bromothioether of the ° formula IX : Rr? ( 3 o R / 5 R! SR? Br 45 in which R! to RS are as defined in claim 1;
    . . 0050749012 AMENDED SHEET . f) oxidation of the bromothioether of the formula IX with an oxidizing agent to give the isoxazoles of the formula X Rr® 4 ) o R ’ / S$ NR RY S(0),R* X 8 where n is the numbers 1 or 2, g) carboxylation of the isoxazole of the formula X in the presence of a compound R6-0H (XI) and carbon monoxide and a catalyst giving compounds of the formula IX.
    3. A process as claimed in claim 2, wherein the carboxylation in process step g) is carried out in the presence of carbon monoxide, a palladium catalyst, if appropriate at least one molar equivalent of a potassium salt and if appropriate at least one molar equivalent of a tertiairy amine of the formula XIII N(Ra), XIII in which one of the radicals R3 can be phenyl or naphthyl and the other radicals R2 are C;-Cg-alkyl, are reacted with one another at 100-140°C and at a pressure of 1-40 kg/cm2.
    4. A process is claimed in claim 3, wherein the reaction is carried out at a pressure of 5-8 kg/cm2.
    5. A process as claimed in claim 3 or 4, wherein the reaction is carried out at 110-130°C.
    6. A process as claimed in any of claims 3 to 5, wherein the catalyst used is a palladium(II) salt. 40 7. A process as claimed in claim 6, wherein the catalyst used is bis(triphenylphosphane)palladium(II) chloride.
    8. A process as claimed in any of claims 3 to 5, wherein the catalyst used is tetrakistriphenylphosphanepalladium(0). 45
    9. A process as claimed in any of claims 3 to 8, wherein the potassium salt used is potassium carbonate, and an amine of
    .- 0050/49012 AMENDED SHEET ® 56 the formula XIII (N(R2)3) is additionally used.
    10. A process as claimed in any of claims 2 to 9, wherein the compound XI and the compound X are employed in a molar ratio of from 1 to 2.
    11. A process as claimed in any of claims 2 to 10, wherein, in process step g), the heterocyclic compound XI used is a pyrazole derivative of the formula XI.a
    R? . . 15 : and R7 is C;-C4-alkyl and M is hydrogen or an alkali : metal atom.
    12. A process as claimed in any of claims 1 to 11, wherein the substituents are as defined below: Rl is C-Cg-alkyl; R2 is C;-Cs-alkyl; R3,R4,R5 are hydrogen or C;-Cs-alkyl; . RS is pyrazol-4-yl which may be substituted by alkyl groups and/or a hydroxyl group.
    13. A compound of the formula III OH NN “Or IIx where R! is C;-Cg-alkyl. 40
    . \ 0050/49G12 AMENDED SHEET
    14. A compound of the formula XII Rr: : 4 0 ~R : 5 . N NL Rr? XII R' A where the radicals are as defined below: A is nitro, amino or the group S~R2; RL is hydrogen, C,-Cg-alkyl; R2 is C;-Cg-alkyl; R3, R¢, R5 are hydrogen, C;-Cg-alkyl, or R? and RS together form a bond.
    15. A compound of the formula X R’ 4 o R
    N . Nn R R! S(0),R® X Br where the radicals are as defined below: Rl is hydrogen, C,-Cg-alkyl; R2 is C;-Cg¢-alkyl; R3, RY, R5 are hydrogen, C;-Cg-alkyl, or R? and RS together form a bond; n is the number 0, 1 or 2.
    16. A process for preparing compounds as claimed in claim 15, 40 comprising one or more of the process steps a)-f) set forth in claim 2.
    17. The use of compounds as claimed in any of claims 13, 14 or 15 for preparing compounds of the formula I. 45
    18. A process for preparing compounds of the formula XV
    ® 58 (Rx), xv C=NOH H ) X ’ in which the radicals are as defined below: X is NO;, S(O)qRY, : Rx, Ry are in each case any inert radical; m is 0, 1, 2, 3 or 4; n is 2; which comprises reacting compounds of the formula XVI y 15 (Rx), XVI CH, X in which the substituents are as defined above with an organic nitrite of the formula R-O-NO, where R is an aliphatic or aromatic radical, in the presence of a base, the reaction being carried out at a temperature below -20°C in the presence of a dipolar aprotic solvent followed, if appropriate, by conversion of the oxime group -CH=NOH in formula XV into the corresponding aldehydes ~CHO, nitriles (-CN) or nitrile oxides (-CNO).
    19. A process as claimed in claim 18, wherein the solvent used is
    DMF.
    20. A process for preparing thioethers of the formula XIX (RX), i 40 R? in which the substituents are as defined below: Rx 1s an inert radical, 45 m is a number from 0 to 5, RZ is C;-Cg-alkyl,
    . 0050/49012 AMENDED SHEET © @ 59 which comprises reacting an aniline of the formula XX (Rx), Oo, NH, with a dialkyl disulfide of the formula VII R*Y—S—s-R* VII in the presence of a catalyst.
    21. A process as claimed in claim 20, wherein the catalyst used is copper powder or elemental copper.
    22. A compound of the formula XV R' C=NOH H : X in which the radicals are as defined below: X is S(0)qaRy, Rl! is hydrogen, C;-Cg-alkyl, halogen, C,;-Cg-alkoxy, C;-Cg~alkylthio, Rx is an inert radical, Ry is any radical selected from the group consisting of hydrogen, chlorine and bromine and located on the phenyl ring in the position para to group X, m is 1, n is 0, 1 or 2.
    35 .
    23. A process for preparing compounds IX or X using one of the processes as claimed in claim 18 and 20.
    24. A process according to the invention for preparing a compound 40 of the formula I, XV, XIX, IX or X substantially as hereinbefore described or exemplified.
    25. A process for preparing a compound of the formula I, XV, XIX, IX or X including any new inventive integer or combination of 45 integers, substantially as herein described.
    « © 0050/29012 AMENDED SHEET ‘@
    26. A compound of the formula III, XII, X or XV as claimed in any one of claims 13 to 15 and 22, specifically as hereinbefore described or exemplified. :
    27. A compound of the formula III, XII, X or XV including any new inventive integer or combination of integers, substantially as herein described.
    28. The use of compounds of the formula III, XII or X as claimed in claim 17, substantially as hereinbefore described or exemplified.
    29. The use of compounds of the formula III, XII or X including any new inventive integer or combination of integers, substantially as herein described. 40
ZA200007286A 1998-05-11 2000-12-08 Method for producing isoxazoline-3-yl-acyl benzene. ZA200007286B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19820722A DE19820722C1 (en) 1998-05-11 1998-05-11 Preparation of benzoyl pyrazole derivative herbicides, in single stage from hydroxypyrazole, bromobenzene and carbon monoxide

Publications (1)

Publication Number Publication Date
ZA200007286B true ZA200007286B (en) 2001-12-10

Family

ID=7867165

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA200007286A ZA200007286B (en) 1998-05-11 2000-12-08 Method for producing isoxazoline-3-yl-acyl benzene.

Country Status (3)

Country Link
CN (1) CN100516030C (en)
DE (1) DE19820722C1 (en)
ZA (1) ZA200007286B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4818511B2 (en) * 1998-11-18 2011-11-16 ビーエーエスエフ ソシエタス・ヨーロピア Process for producing 2-alkyl-3- (4,5-dihydroisoxazol-3-yl) halobenzenes
GB201117019D0 (en) 2011-10-04 2011-11-16 Syngenta Ltd Herbicidal compounds
GB201121317D0 (en) 2011-12-09 2012-01-25 Syngenta Ltd Herbicidal compounds
CN110526844B (en) * 2018-05-25 2021-11-12 江苏中旗科技股份有限公司 Synthetic method of topramezone intermediate 2, 3-dimethyl benzylthio-ether
CN111848466A (en) * 2019-03-08 2020-10-30 新昌县大船畈生物科技有限公司 Preparation method of edible essence and spice
CN112321466A (en) * 2020-11-23 2021-02-05 华东师范大学 Synthetic method of topramezone key intermediate
CN115385832B (en) * 2022-09-13 2024-04-30 江苏七洲绿色科技研究院有限公司 Preparation method of 2, 3-dimethyl 4-methylsulfonyl bromobenzene

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2699549B2 (en) * 1988-06-03 1998-01-19 日産化学工業株式会社 Method for producing 4-benzoyl-5-hydroxypyrazoles
US5486521A (en) * 1994-03-21 1996-01-23 Uniroyal Chemical Company, Inc. Pyrimidinyl aryl ketone oximes
TR199700844T1 (en) * 1995-02-24 1998-01-21 Basf Aktiengesellschaft Pyrazolyl-Benzoil T�revleri.
EP0891972A4 (en) * 1996-03-26 2000-12-13 Nippon Soda Co 3-(isoxazol-5-yl)-substituted benzoic acid derivatives and process for producing the same

Also Published As

Publication number Publication date
DE19820722C1 (en) 1999-11-04
CN100516030C (en) 2009-07-22
CN1757634A (en) 2006-04-12

Similar Documents

Publication Publication Date Title
JP5642422B2 (en) Intermediate of isoxazolin-3-ylacylbenzene and process for producing the same
JP2008544996A (en) Process for producing 3-arylmethylthio- and 3-heteroarylmethylthio-4,5-dihydroisoxazoline derivatives
DK3215481T3 (en) PROCEDURE FOR PREPARING BIPHENYLAMINES OF AZOBENZENES USING RUTHENIUM CATALYZE
ZA200007286B (en) Method for producing isoxazoline-3-yl-acyl benzene.
JP7311520B2 (en) Method for the synthesis of sulfentrazone
JP4818511B2 (en) Process for producing 2-alkyl-3- (4,5-dihydroisoxazol-3-yl) halobenzenes
EP0727424B1 (en) Process for the preparation of sulfonylurea derivatives
TW576714B (en) Process for the preparation of polyhalogenated para-trifluoromethylanilines
JP4712320B2 (en) Process for producing 2-oxo-1-phenyl-3-oxabicyclo [3.1.0] hexane
JP4140066B2 (en) Process for the preparation of optionally 2-substituted 5-chloroimidazole-4-carbaldehyde
JPH10511969A (en) Production of 3,5-diarylpyrazole
JP4041881B2 (en) Novel N-thio-substituted heterocyclic compound and method for producing the same
CN103044332A (en) Process for the preparation of n-substituted pyrazole compounds
KR100362353B1 (en) 2-substituted 5-chloroamidazole
HU207718B (en) Process for producing 3,5,6-trichloropyridin-2-ol
JP5370990B2 (en) Novel sulfenamide compound and process for producing the same
JP2004196730A (en) Novel n-sulfenylpyrrole compound and manufacturing method thereof
KR20180088397A (en) Method for producing 2-alkyl-4-trifluoromethyl-3-alkylsulfonylbenzoic acid by chemical selective thioether oxidation
Ibrahim et al. A convenient synthesis of N, N'-acylated perimidones
JP2000026382A (en) Metal salt catalyst for oxazolines and production of chloroketones thereafter
JPH02268141A (en) Production of aromatic amines
HU202491B (en) Process for producing pyrroline derivatives
MXPA01004998A (en) Method of producing 2-alkyl-3-(4,5-dihydroisoxazole-3-yl)-halobenzenes
JP2012162504A (en) N-sulfenyl pyrrole compound having carboxyl group and method of manufacturing the same
JPH1025284A (en) Production of 1,2,5-thiadiazole derivative