EP1165539A1 - Procede de preparation de derives de benzofurannedionoxime - Google Patents

Procede de preparation de derives de benzofurannedionoxime

Info

Publication number
EP1165539A1
EP1165539A1 EP00914135A EP00914135A EP1165539A1 EP 1165539 A1 EP1165539 A1 EP 1165539A1 EP 00914135 A EP00914135 A EP 00914135A EP 00914135 A EP00914135 A EP 00914135A EP 1165539 A1 EP1165539 A1 EP 1165539A1
Authority
EP
European Patent Office
Prior art keywords
formula
compounds
substituted
unsubstituted alkyl
acid
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.)
Withdrawn
Application number
EP00914135A
Other languages
German (de)
English (en)
Inventor
Walter Hübsch
Lubbertus Mulder
Bernd Gallenkamp
Herbert Gayer
Reinhard Lantzsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer CropScience AG
Original Assignee
Bayer 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 Bayer AG filed Critical Bayer AG
Publication of EP1165539A1 publication Critical patent/EP1165539A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D307/78—Benzo [b] furans; Hydrogenated benzo [b] furans
    • C07D307/82—Benzo [b] furans; Hydrogenated benzo [b] furans 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 carbon atoms of the hetero ring
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D307/78—Benzo [b] furans; Hydrogenated benzo [b] furans
    • C07D307/82—Benzo [b] furans; Hydrogenated benzo [b] furans 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 carbon atoms of the hetero ring
    • C07D307/83—Oxygen atoms

Definitions

  • the present invention relates to a new process for the preparation of benzofurandione oxime derivatives.
  • R 1 represents substituted or unsubstituted alkyl
  • R 3 represents hydrogen, substituted or unsubstituted alkyl, alkoxy, haloalkoxy or halogen
  • R 1 and R 3 have the meaning given above, and
  • R 2 represents hydrogen, or substituted or unsubstituted alkyl
  • dialkylsilyl chloride in the presence of dialkyl sulfoxide, optionally in a diluent and / or a solvent.
  • Acids in the sense of the invention are more highly concentrated acids, in particular mineral acids.
  • Preferred mineral acids are sulfuric acid, preferably 10 to 90% sulfuric acid, in particular semi-concentrated commercially available sulfuric acid, and / or phosphoric acid, preferably 20 to 95% phosphoric acid, in particular commercially available 85% phosphoric acid.
  • Diluents and / or solvents by way of example and preferably water; Alcohols, especially methanol; Ether. especially dimethoxyethane, Tetrahydrofuran, methyl tert-butyl ether or tert-amyl methyl ether; Alkyl nitriles, especially acetonitrile; Ketones, in particular acetone or solvent mixtures thereof, in particular alcohol-water mixtures, are used.
  • ethers in particular dimethoxyethane, tetrahydrofuran, methyl tert-butyl ether or tert-amyl methyl ether, are used as diluents and / or solvents; Alkyl nitriles, especially acetonitrile; N-methyl pyrrolidone; Alkane carboxylic acid esters, especially ethyl acetate; Ketones, especially acetone or solvent mixtures thereof are used.
  • reaction of compounds of formula (II) with acids takes place in a temperature range from 0 ° C to 100 ° C, preferably in a temperature range from 20 ° C to 80 ° C.
  • reaction of compounds of formula (II) with trialkylsilyl chloride in the presence of dialkyl sulfoxide takes place in a temperature range from 0 ° C. to the reflux temperature of the particular mixture, preferably at the reflux temperature.
  • reaction of compounds of formula (II) is carried out under normal pressure, under elevated or under reduced pressure, preferably under normal pressure.
  • the compounds of formula (II) are used as E / Z isomer mixtures or as pure isomers.
  • the compounds of the formula (I) obtainable by the process according to the invention are then obtained in the form of the isomer mixtures or in the form of the pure isomers.
  • the isomer mixtures obtained can optionally by customary methods, for. B. separated by chromatography into the pure isomers.
  • the starting materials are defined by formula (II) above.
  • the saturated or unsaturated hydrocarbon chains are each straight-chain or branched.
  • alkyl represents C 1 -C 4 -alkyl, in particular methyl, ethyl, n-propyl, i-propyl, n-butyl, s-butyl, t-butyl or i-butyl.
  • alkoxy is C r C 4 alkyl, in particular methoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, s-butoxy, t-butoxy or i-butoxy.
  • Alkyloxycarbonyl or halogen preferred.
  • Halogen generally represents fluorine, chlorine, bromine or iodine, preferably fluorine, chlorine or bromine, in particular fluorine or chlorine.
  • R ' is preferably methyl.
  • R 2 is preferably hydrogen or 2-hydroxyethyl, in particular hydrogen.
  • R 3 is preferably hydrogen.
  • A-19706399, DE-A-19706396 and EP-A-0 846 691 The compounds of formula (II) which are not yet known can be prepared by the processes described in DE-A-19706399, DE-A-19706396 and / or EP-A-0 846 691.
  • a decisive advantage of the method according to the invention is the increased yield compared to the known methods.
  • Another advantage of the process according to the invention is that the use of mixtures of isomers results in the majority of the E isomers. It is also extremely surprising to the person skilled in the art that the reaction of compounds of the formula (II) can be carried out in an acidic medium.
  • the process is used for the production of important intermediates of formula (I) which facilitate the production of known pesticides.
  • the reaction mixture is stirred at 55 ° C. for one hour and under reflux for one hour until the evolution of gas has ended.
  • the mixture is then cooled to 20 ° C., the suspension is suctioned off and washed with acetonitrile.
  • the orange filtrate is added dropwise to 18 l of ice water and 2 l of petroleum ether within 30 minutes.
  • the suspension is stirred for 30 minutes at 20 ° C, the product settles in the upper petroleum ether phase.
  • the lower aqueous phase is drained off and the product is suctioned off in the PE phase and washed with 1.5 l of petroleum ether, 4.0 l of water and 1.0 l of petroleum ether and dried in vacuo at 40.degree.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)

Abstract

Nouveau procédé de préparation de dérivés de benzofurannedionoxime par mise en réaction de dérivés de benzofurannedionoxime avec des acides.
EP00914135A 1999-03-27 2000-03-15 Procede de preparation de derives de benzofurannedionoxime Withdrawn EP1165539A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19914142 1999-03-27
DE19914142A DE19914142A1 (de) 1999-03-27 1999-03-27 Verfahren zur Herstellung von Benzofurandionoxim-Derivaten
PCT/EP2000/002283 WO2000058299A1 (fr) 1999-03-27 2000-03-15 Procede de preparation de derives de benzofurannedionoxime

Publications (1)

Publication Number Publication Date
EP1165539A1 true EP1165539A1 (fr) 2002-01-02

Family

ID=7902776

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00914135A Withdrawn EP1165539A1 (fr) 1999-03-27 2000-03-15 Procede de preparation de derives de benzofurannedionoxime

Country Status (7)

Country Link
US (1) US6462205B1 (fr)
EP (1) EP1165539A1 (fr)
JP (1) JP2002540202A (fr)
AU (1) AU3556000A (fr)
DE (1) DE19914142A1 (fr)
TW (1) TW544450B (fr)
WO (1) WO2000058299A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9218541D0 (en) * 1991-09-30 1992-10-14 Ici Plc Fungicides
ZW8594A1 (en) * 1993-08-11 1994-10-12 Bayer Ag Substituted azadioxacycbalkenes
GB9404375D0 (en) * 1994-03-07 1994-04-20 Zeneca Ltd Fungicides
TW492962B (en) 1996-05-30 2002-07-01 Bayer Ag Process for preparing 3-(1-hydroxyphenyl-1-alkoximinomethyl)dioxazines
DE19706396A1 (de) 1996-12-09 1998-06-10 Bayer Ag Verfahren zur Herstellung von 3-(l-Hydroxiphenyl-l-alkoximinomethyl)dioxazinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0058299A1 *

Also Published As

Publication number Publication date
WO2000058299A1 (fr) 2000-10-05
US6462205B1 (en) 2002-10-08
JP2002540202A (ja) 2002-11-26
TW544450B (en) 2003-08-01
AU3556000A (en) 2000-10-16
DE19914142A1 (de) 2000-09-28

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