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EP1230233A1 - 5-halo-4-fluoro-4,7,7-trimethyl-3-oxabicyclo 4.1.0]heptane-2-ones, method for their production and their use in the production of cyclopropane carboxylic acids - Google Patents

5-halo-4-fluoro-4,7,7-trimethyl-3-oxabicyclo 4.1.0]heptane-2-ones, method for their production and their use in the production of cyclopropane carboxylic acids

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Publication number
EP1230233A1
EP1230233A1 EP00974498A EP00974498A EP1230233A1 EP 1230233 A1 EP1230233 A1 EP 1230233A1 EP 00974498 A EP00974498 A EP 00974498A EP 00974498 A EP00974498 A EP 00974498A EP 1230233 A1 EP1230233 A1 EP 1230233A1
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EP
European Patent Office
Prior art keywords
formula
production
compound
trimethyl
fluoro
Prior art date
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EP00974498A
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German (de)
French (fr)
Inventor
Jean Pierre Demoute
Günter Hömberger
Sergej Pazenok
Didier Babin
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Bayer CropScience AG
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Aventis CropScience GmbH
Bayer CropScience AG
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Publication of EP1230233A1 publication Critical patent/EP1230233A1/en
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
    • C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D311/94—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems condensed with rings other than six-membered or with ring systems containing such rings
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/09—Preparation of carboxylic acids or their salts, halides or anhydrides from carboxylic acid esters or lactones

Definitions

  • Pyrethroids are an important class of insecticides, the effectiveness of which is based on a strong influence on the sodium channels in the nerve membranes of insects.
  • WO-A 99/32426 describes derivatives of 2,2-dimethyl-3- (2-fluorovinyl) cyclopropanecarboxylic acid as highly effective pyrethroids. This acid is prepared by multistage reductive transformation of 2,2-dimethyl-3- (2-fluoro-3-hydroxy-3-oxo-1-propenyl) cyclopropanecarboxylic acid esters.
  • Halofluorination of enollactones is known in principle (see M. Brand and S. Rozen, J. of Fluorine Chem. (1982), 20, 419 or Houben-Weyl, Methods of Organic Chemistry, Vol. E. 10).
  • halofluorination is only limited to substrates that are stable under halofluorination conditions. It is also known that cyclopropane or its derivatives with HF or even with HF / Py is below room temperature Ring opening and formation of fluoropropanes or cyclobutane derivatives react (see, for example, J. Org. Chem. (1979), 44, 3873 or Tet. Lett. (1987), 28, 6313).
  • Tricyclic bicydic enollactones are very sensitive to acids, bases and oxidizing agents and usually react by opening the lactone or cyclopropane ring. It is therefore surprising that the chloro, bromo or iodofluorination of enollactones leads to chlorofiuor, bromofluor or iodofluorine compounds in good yields and high purities.
  • the invention relates to halogenated lactones of the formula (I)
  • shark means Cl, Br or I.
  • the compounds of formula (I) include all possible stereoisomers.
  • the compounds of the formula (I) are prepared by reacting an enollactone (II) with a halogen fluorinating agent (“HalF”),
  • shark means Cl, Br or I.
  • This method is also the subject of the invention.
  • halogen fluorinating agents is understood to mean reagents or combinations thereof which can transfer positive halogen atoms and fluoride anions to organic compounds.
  • the reaction can be carried out using CIF, BrF (see, for example, M. Brand and S. Rozen, I. of Fuorine Chem. (1982), 20, 419) or, preferably, an equivalent containing a compound which contains one or more positively halogenated atoms (Hal + ) contains, as well as hydrofluoric acid or its salts (see, for example, F. Camps et al., J. Org. Chem. (1989), 54, 4294).
  • Hal + sources are preferably N-chloroacetamide, hexachloromelamine, N-bromoacetamide, N-chlorosuccinimide (NCIS), N-bromosuccinimide (NBS), N-iodosuccinimide, 1-bromo-3,5,5-trimethylhydantoin, N, N -Dibromo-5,5-dimethylhydantoin DBH), other halogenating agents are also possible. A mixture of two or more halogen compounds can also be used. NBS and DBH are particularly preferred as halogenating agents, and DBH is very particularly preferred.
  • Fluorides of the formula (III) are generally used as fluorides:
  • KAT stands for a stoichiometric equivalent of an alkaline earth metal ion, an alkali metal ion, a tetraalkylammonium ion, a tetralkylphosphonium ion, a tetraarylphosphonium ion or a tetrakis (dialkylamino) phosphonium ion, where alkyl is an alkyl group with preferably 1 to 6 Carbon atoms, aryl is an aryl group having 6 to 12 carbon atoms and n is 0, 1, 2, 3, 4 or 5.
  • a mixture of two or more fluorides can also be used. It is also possible to use systems composed of fluorine-containing compounds and water, for example SiF 4 / H 2 O, SbF 3 / H 2 O, AIF 3 / H 2 O. It is also possible to use [CIF] from Cl 2 and F 2 or [BrF] from Br 2 and F 2 (see, for example, M Brand and S. Rozen, J. of Fluorine Chem. (1982), 20, 419).
  • the process can be carried out in the presence or absence of a solvent.
  • solvents are used, both polar and non-polar solvents are suitable.
  • Suitable solvents are, for example: hexane, cyclohexane, dioxane, diethyl ether, diisopropyl ether, toluene, dichloromethane, dichloroethane and polyether.
  • the reaction temperature is usually between -30 and + 30 ° C, preferably between -15 and + 20 ° C and also depends in the manner known to the person skilled in the art on the type of halofluorinating reagent.
  • the fluorides are generally used in amounts of 0.2 to 2, in particular 0.25 to 1.5, preferably 0.4 to 1 mol, based on 1 mol of enollactone.
  • the amount of fluoride depends on the number of fluoride atoms in the molecule. So the use of HF requires twice the amount of tetrabutylammonium - hydrogendifluorid. It should be noted that there may be cases in which an excess of fluoride can lead to undesirable side reactions. In these cases it is advisable to use the fluoride in a deficit.
  • the halogenating agent is generally used in an amount of 0.5 to 2 mol, preferably 0.4 to 1 mol, based on 1 mol of enollactone.
  • the amount of halogenating agent depends on the number of halogen atoms in the molecule. For example, the use of N-bromosuccinimide requires twice the amount of dibromohydantoin.
  • the enollactone of the formula (II) comprises all possible stereoisomeric forms. It is known and can be synthesized by methods known from the literature (see, for example, D. Bakshi et al., Tetrahedron (1989), 45, 767).
  • Halofluorination of enollactones of formula (II) leads to an isomer mixture of several stereoisomers, e.g. In the case of bromofluorination of (1 R, 6S) -4,7,7-trimethyl-3-oxabicyclo [4.1.1] hept-4-en-2-one, a mixture of isomers of mainly three stereoisomers is formed:
  • reducing agents such as Mg, Fe, Zn, Sn, Al, Bu 3 SnH, LiAIH 4 , are suitable as reducing agents (see, for example, J. Am. Chem. Soc. 121, 4155, 1990).
  • the cyclopropanecarboxylic acid of the formula (IV) can be formed as a mixture of two geometric isomers.
  • X is a leaving group, preferably OH, Cl, Br, I, OTosyl (tosyl: p-toluenesulfonyl) or OMesyl (mesyl: methanesulfonyl), and R is the rest of an alcohol from the pyrethroid series, converted to a compound of formula (VI) become,
  • R preferably has the meanings given in formula (I) in WO-A 99/32426. Reference is hereby expressly made to this document; by quotation it is part of this description.
  • DCC dicyclohexylcarbodiimide
  • the corresponding carboxylic acids and alcohols are known or can be prepared analogously to known processes.
  • Suitable reactive derivatives of the carboxylic acids mentioned are in particular the acid halides, especially the chlorides and bromides, and also the anhydrides, e.g. also mixed anhydrides, azides or esters, in particular alkyl esters with 1-4 C atoms in the alkyl group.
  • Suitable reactive derivatives of alcohols are in particular the corresponding metal alcoholates, preferably an alkali metal such as sodium or potassium.
  • the esterification is advantageously carried out in the presence of an inert solvent.
  • ethers such as diethyl ether, di-n-butyl ether, THF (tetrahydrofuran), dioxane or anisole, ketones such as acetone, butanone or cyclohexanone, amides such as DMF (NiN-dimethylformamide) or phosphoric acid hexamethyl triamide, hydrocarbons such as benzene, Toluene or xylene, halogenated hydrocarbons such as carbon tetrachloride, dichloromethane or tetrachlorethylene, and sulfoxides such as dimethyl sulfoxide or sulfolane.
  • the invention therefore also relates to a process for the preparation of a compound of the formula (VI),
  • R represents the remainder of an alcohol from the pyrethroid series, comprising the steps:
  • Preferred compounds of the formula (VI) prepared by the process according to the invention are Examples 1 to 33 of WO-A 99/32426, to which reference is expressly made here; by quotation they are part of this description.
  • the invention furthermore relates to the use of compounds of the formula (I) as intermediates in the preparation of pyrethroids, preferably those of the formula (VI).
  • NCS N-chlorosuccinimide
  • NBS N-bromosuccinimide
  • DIPE diispropyl ether
  • DBH N, N-dibromo-5,5-dimethylhydantoin

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Furan Compounds (AREA)
  • Pyrane Compounds (AREA)

Abstract

The invention relates to 5-halo-4-fluoro-4,7,7-trimethyl-3-oxabicyclo[4.1.0]heptane-2-ones, to a method for their production and to their use in the production of cyclopropane carboxylic acids. The invention relates to the compounds of formula (I), wherein Hal represents Cl, Br, or I. The inventive compounds are useful as the intermediates in the production of pyrethroids.

Description

5-Halo-4-fluor-4,7,7-trimethyl-3-oxabicyclo[4.1.0]heptan-2-one, Verfahren zu ihrer Herstellung sowie ihre Verwendung zur Herstellung von Cyclopropancarbonsäuren.5-Halo-4-fluoro-4,7,7-trimethyl-3-oxabicyclo [4.1.0] heptan-2-one, process for their preparation and their use for the preparation of cyclopropanecarboxylic acids.
Pyrethroide sind eine wichtige Klasse von Insektiziden, deren Wirksamkeit auf einer starken Beeinflussung der Natriumkanäle in den Nervenmembranen von Insekten beruht.Pyrethroids are an important class of insecticides, the effectiveness of which is based on a strong influence on the sodium channels in the nerve membranes of insects.
In der WO-A 99/32426 sind Derivate der 2,2-DimethyI-3-(2-fluorvinyl)cyclopropan- carbonsäure als hochwirksame Pyrethroide beschrieben. Die Herstellung dieser Säure erfolgt durch mehrstufige reduktive Transformation von 2,2-Dimethyl-3-(2- fluor-3-hydroxy-3-oxo-1-propenyl)cyclopropancarbonsäureestern.WO-A 99/32426 describes derivatives of 2,2-dimethyl-3- (2-fluorovinyl) cyclopropanecarboxylic acid as highly effective pyrethroids. This acid is prepared by multistage reductive transformation of 2,2-dimethyl-3- (2-fluoro-3-hydroxy-3-oxo-1-propenyl) cyclopropanecarboxylic acid esters.
Aufgabe war es, neue vorteilhafte Synthesewege für die Säure und damit die genannten Pyrethroide zu finden.The task was to find new advantageous synthetic routes for the acid and thus the pyrethroids mentioned.
Es wurde nun überraschend gefunden, daß sich 2,2-Dimethyl-3-(2- fluorvinyl)cyclopropancarbonsäure in einfacher Weise in hoher Reinheit und guten Ausbeuten durch Halofluorierung von 4,7,7-Trimethyl-3-oxabicylo[4.1.0]hept-4-en-2- on zu den neuen 5-Halo-4-fluor-4,7,7-trimethyl-3-oxabicyclo [4.1.0]heptan-2-onen mit anschließender reduktiver Eliminierung herstellen läßt.It has now surprisingly been found that 2,2-dimethyl-3- (2-fluorovinyl) cyclopropanecarboxylic acid can be obtained in a simple manner in high purity and in good yields by halofluorination of 4,7,7-trimethyl-3-oxabicylo [4.1.0] hept-4-en-2-one to the new 5-halo-4-fluoro-4,7,7-trimethyl-3-oxabicyclo [4.1.0] heptan-2-ones can be prepared with subsequent reductive elimination.
Die Halofluorierung von Enollactonen ist im Prinzip bekannt (siehe M. Brand u. S. Rozen, J. of Fluorine Chem. (1982), 20, 419 oder Houben-Weyl, Methoden der organischen Chemie, Bd. E. 10).Halofluorination of enollactones is known in principle (see M. Brand and S. Rozen, J. of Fluorine Chem. (1982), 20, 419 or Houben-Weyl, Methods of Organic Chemistry, Vol. E. 10).
Allerdings ist die Halofluorierung nur auf solche Substrate beschränkt, die unter Halofluorierungsbedingungen stabil sind. Ferner ist bekannt, daß Cyclopropan oder dessen Derivate mit HF oder sogar mit HF/Py schon bei Raumtemperatur unter Ringöffnung und Bildung von Fluorpropanen oder Cyclobutanderivaten reagieren (siehe z.B. J. Org. Chem. (1979), 44, 3873 oder Tet. Lett. (1987), 28, 6313).However, halofluorination is only limited to substrates that are stable under halofluorination conditions. It is also known that cyclopropane or its derivatives with HF or even with HF / Py is below room temperature Ring opening and formation of fluoropropanes or cyclobutane derivatives react (see, for example, J. Org. Chem. (1979), 44, 3873 or Tet. Lett. (1987), 28, 6313).
Dreiringe enthaltende bicydische Enollactone sind sehr sensibel gegenüber Säuren, Basen und Oxidationsmitteln und reagieren normalerweise unter Lacton- oder Cyclopropanringöffnung. Deswegen ist es überraschend, daß die Chloro-, Bromo- oder lodofluorierung von Enollactonen zu Chlorfiuor-, Bromfluor- oder lodfluorverbindungen in guten Ausbeuten und hohen Reinheiten führt.Tricyclic bicydic enollactones are very sensitive to acids, bases and oxidizing agents and usually react by opening the lactone or cyclopropane ring. It is therefore surprising that the chloro, bromo or iodofluorination of enollactones leads to chlorofiuor, bromofluor or iodofluorine compounds in good yields and high purities.
Gegenstand der Erfindung sind halogenierte Lactone der Formel (I),The invention relates to halogenated lactones of the formula (I)
wobei Hai Cl, Br oder I bedeutet.where shark means Cl, Br or I.
Die Verbindungen der Formel (I) umfassen alle möglichen Stereoisomeren.The compounds of formula (I) include all possible stereoisomers.
Verbindungen der Formel (I) eignen sich in hervorragender Weise als Zwischenprodukte zur Herstellung von Pyrethroiden, wie sie in WO-A 99/32426 beschrieben sind.Compounds of the formula (I) are outstandingly suitable as intermediates for the preparation of pyrethroids, as are described in WO-A 99/32426.
Die Herstellung der Verbindungen der Formel (I) erfolgt durch Umsetzung eines Enollactons (II) mit einem Halogenfluorierungsmittel („HalF"),The compounds of the formula (I) are prepared by reacting an enollactone (II) with a halogen fluorinating agent (“HalF”),
wobei Hai Cl, Br oder I bedeutet. where shark means Cl, Br or I.
Dieses Verfahren ist ebenfalls Gegenstand der Erfindung.This method is also the subject of the invention.
Unter dem Begriff Halogenfluorierungsmittel versteht man Regenzien oder Kombinationen daraus, die positive Halogenatome und Fluoridanionen auf organische Verbindungen übertragen können.The term halogen fluorinating agents is understood to mean reagents or combinations thereof which can transfer positive halogen atoms and fluoride anions to organic compounds.
Die Umsetzung kann mit CIF, BrF (siehe z.B. M. Brand u. S. Rozen, I. of Fuorine Chem. (1982), 20, 419) oder vorzugsweise einem Äquivalent, enthaltend eine Verbindung, die ein oder mehrere positivierte Halogenatome (Hal+) enthält, sowie Flußsäure oder ihren Salzen (siehe z.B. F. Camps et al., J. Org. Chem. (1989), 54, 4294) erfolgen.The reaction can be carried out using CIF, BrF (see, for example, M. Brand and S. Rozen, I. of Fuorine Chem. (1982), 20, 419) or, preferably, an equivalent containing a compound which contains one or more positively halogenated atoms (Hal + ) contains, as well as hydrofluoric acid or its salts (see, for example, F. Camps et al., J. Org. Chem. (1989), 54, 4294).
Als Hal+-Quelle sind bevorzugt N-Chloracetamid, Hexachlormelamine.N- Bromacetamid, N-Chlorsuccinimid (NCIS), N-Bromsuccinimid (NBS), N- lodsuccinimid, 1-Brom-3,5,5-trimethylhydantoin, N,N-Dibrom-5,5-dimethylhydantoin DBH), daneben sind andere Halogenierungsmittei möglich. Man kann auch ein Gemisch von zwei oder mehreren Halogenverbindungen einsetzen. Besonders bevorzugt als Halogenierungsmittei sind NBS und DBH, ganz besonders bevorzugt ist DBH.Hal + sources are preferably N-chloroacetamide, hexachloromelamine, N-bromoacetamide, N-chlorosuccinimide (NCIS), N-bromosuccinimide (NBS), N-iodosuccinimide, 1-bromo-3,5,5-trimethylhydantoin, N, N -Dibromo-5,5-dimethylhydantoin DBH), other halogenating agents are also possible. A mixture of two or more halogen compounds can also be used. NBS and DBH are particularly preferred as halogenating agents, and DBH is very particularly preferred.
Als Fluoride werden im allgemeinen Fluoride der Formel (III) eingesetzt:Fluorides of the formula (III) are generally used as fluorides:
KAT HnFn+1 (III)CAT H n F n + 1 (III)
worin KAT für ein stöchiometrisches Äquivalent eines Erdalkalimetallions, eines Alkalimetallions, eines Tetraalkylammonium-lons, eines Tetralkylphosphonium-Ions, eines Tetraarylphosphonium-Ions oder eines Tetrakis(dialkylamino)phosphonium- lons steht, wobei Alkyl eine Alkylgruppe mit vorzugsweise 1 bis 6 Kohlenstoffatomen, Aryl eine Arylgruppe mit 6 bis 12 Kohlenstoffatomen und n 0, 1 , 2, 3, 4 oder 5 bedeutet.wherein KAT stands for a stoichiometric equivalent of an alkaline earth metal ion, an alkali metal ion, a tetraalkylammonium ion, a tetralkylphosphonium ion, a tetraarylphosphonium ion or a tetrakis (dialkylamino) phosphonium ion, where alkyl is an alkyl group with preferably 1 to 6 Carbon atoms, aryl is an aryl group having 6 to 12 carbon atoms and n is 0, 1, 2, 3, 4 or 5.
Ohne Anspruch auf Vollständigkeit zu erheben, seien folgende Stoffe als Fluoride genannt:Without claiming to be complete, the following substances are mentioned as fluorides:
Kaliumhydrogendifluorid, Kaliumtetrahydrogenpentafluorid, Tetramethylammoniumfluorid, Tetramethylammoniumhydrogendifluorid, Tetramethylammoniumdihydrogen-trifluorid, Tetraethylammoniumhydrogendifluorid, Tetrabutylammoniumhydrogen-difluorid, Tetrabutylammoniumdihydrogentrifluorid, Benzyltrimethylammoniumhydrogendifluorid, Tetraphenylphosphoniumhydrogen- difluorid, Tetrakis(diethylamino)phosphoniumhydrogendifluorid, HF, HF/Puridin- Komplex, Et3N x 3HF, Bu3N x 3HF. Man kann auch ein Gemisch von zwei oder mehreren Fluoriden einsetzen. Es ist auch möglich, Systeme aus fluorhaltigen Verbindungen und Wasser einzusetzen, z.B SiF4/H2O, SbF3/H2O, AIF3/H2O. Ferner es ist möglich, [CIF] aus Cl2 und F2 oder [BrF] aus Br2 und F2 einzusetzen (siehe z.B.M. Brand u. S. Rozen, J. of Fluorine Chem. (1982), 20, 419).Potassium hydrogen difluoride, potassium tetrahydrogen pentafluoride, tetramethylammonium fluoride, Tetramethylammoniumhydrogendifluorid, Tetramethylammoniumdihydrogen trifluoride, Tetraethylammoniumhydrogendifluorid, Tetrabutylammoniumhydrogen difluoride, tetrabutylammonium, Benzyltrimethylammoniumhydrogendifluorid, difluoride Tetraphenylphosphoniumhydrogen-, tetrakis (diethylamino) phosphoniumhydrogendifluorid, HF, HF / Puridin- complex, Et 3 N x 3HF, Bu 3 N x 3HF. A mixture of two or more fluorides can also be used. It is also possible to use systems composed of fluorine-containing compounds and water, for example SiF 4 / H 2 O, SbF 3 / H 2 O, AIF 3 / H 2 O. It is also possible to use [CIF] from Cl 2 and F 2 or [BrF] from Br 2 and F 2 (see, for example, M Brand and S. Rozen, J. of Fluorine Chem. (1982), 20, 419).
Das Verfahren läßt sich in Anwesenheit oder Abwesenheit eines Lösungsmittels durchführen. Werden Lösungsmittel verwendet, so sind sowohl polare als auch nichtpolare Lösungsmittel geeignet. Geeignete Lösemittel sind beispielsweise: Hexan, Cyclohexan, Dioxan, Diethylether, Diisopropylether, Toluol, Dichlormethan, Dichlorethan und Polyether.The process can be carried out in the presence or absence of a solvent. If solvents are used, both polar and non-polar solvents are suitable. Suitable solvents are, for example: hexane, cyclohexane, dioxane, diethyl ether, diisopropyl ether, toluene, dichloromethane, dichloroethane and polyether.
Die Reaktionstemperatur liegt üblicherweise zwischen -30 und + 30°C, bevorzugt zwischen -15 und +20°C und hängt auch in der dem Fachmann bekannten Weise von der Art des Halofluorierungsreagenzes ab.The reaction temperature is usually between -30 and + 30 ° C, preferably between -15 and + 20 ° C and also depends in the manner known to the person skilled in the art on the type of halofluorinating reagent.
Man setzt die Fluoride im allgemeinen in Mengen von 0.2 bis 2, insbesondere 0.25 bis 1.5, bevorzugt 0.4 bis 1 Mol, bezogen auf 1 Mol Enollacton ein. Die Menge an Fluorid hängt von der Anzahl Fluoridatome im Molekül ab. So erfordert die Anwendung von HF die doppelte Menge im Vergleich zu Tetrabutylammonium - hydrogendifluorid. Es ist zu berücksichtigen, daß es Fälle geben kann, in denen ein Überschuß an Fluorid zu unerwünschten Nebenreaktionen führen kann. In diesen Fällen empfiehlt es sich, das Fluorid im Unterschuß einzusetzen.The fluorides are generally used in amounts of 0.2 to 2, in particular 0.25 to 1.5, preferably 0.4 to 1 mol, based on 1 mol of enollactone. The amount of fluoride depends on the number of fluoride atoms in the molecule. So the use of HF requires twice the amount of tetrabutylammonium - hydrogendifluorid. It should be noted that there may be cases in which an excess of fluoride can lead to undesirable side reactions. In these cases it is advisable to use the fluoride in a deficit.
Das Halogenierungmittel wird im allgemeinen in einer Menge von 0.5 bis 2 Mol, bevorzugt 0.4 bis 1 Mol bezogen auf 1 Mol Enollacton eingesetzt. Die Menge an Halogenierungsmittei hängt von der Anzahl Halogenatome im Molekül ab. So erfordert die Anwendung von N-Bromsuccinimid die doppelte Menge im Vergleich zu Dibromhydantoin.The halogenating agent is generally used in an amount of 0.5 to 2 mol, preferably 0.4 to 1 mol, based on 1 mol of enollactone. The amount of halogenating agent depends on the number of halogen atoms in the molecule. For example, the use of N-bromosuccinimide requires twice the amount of dibromohydantoin.
Das Enollacton der Formel (II) umfaßt alle möglichen stereoisomeren Formen. Es ist bekannt und läßt sich nach literaturbekannten Methoden synthetisieren (siehe z.B. D. Bakshi et al., Tetrahedron (1989), 45, 767).The enollactone of the formula (II) comprises all possible stereoisomeric forms. It is known and can be synthesized by methods known from the literature (see, for example, D. Bakshi et al., Tetrahedron (1989), 45, 767).
Die Halofluorierung von Enollactonen der Formel (II) führt zu einem Isomerengemisch von mehreren Stereoisomeren, z.B. entsteht im Fall der Bromofluorierung von (1 R,6S)-4,7,7-Trimethyl-3-oxabicyclo[4.1.1]hept-4-en-2-on ein Isomerengemisch von hauptsächlich drei Stereoisomeren:Halofluorination of enollactones of formula (II) leads to an isomer mixture of several stereoisomers, e.g. In the case of bromofluorination of (1 R, 6S) -4,7,7-trimethyl-3-oxabicyclo [4.1.1] hept-4-en-2-one, a mixture of isomers of mainly three stereoisomers is formed:
BB
Allerdings ist es in einfacher, dem Fachmann geläufiger Weise möglich, durch Reaktionsbedingungen (Zeit, Temperatur etc.) die Isomerenverhältnisse zu beeinflussen (siehe die Tabelle 1 in den Beispielen). Isomer A läßt sich durch Kristallisation aus Alkohol in reiner Form zu isolieren. Die Isolierung von anderen Isomeren gelingt durch Chromatographie, beispielsweise durch Mitteldruckflüssigchromatographie (MPLC) an Hexan/Essigester Gemischen. Die Verbindungen der Formel (I) lassen sich durch Reaktion mit einem Reduktionsmittel weiter zu cis-Cyclopropancarbonsäuren der Formel (IV) umsetzen:However, it is possible in a simple manner familiar to the person skilled in the art to influence the isomer ratios by means of reaction conditions (time, temperature, etc.) (see Table 1 in the examples). Isomer A can be isolated in pure form by crystallization from alcohol. Other isomers are isolated by chromatography, for example by means of medium pressure liquid chromatography (MPLC) on hexane / ethyl acetate mixtures. The compounds of the formula (I) can be further converted to cis-cyclopropanecarboxylic acids of the formula (IV) by reaction with a reducing agent:
(i) (IV)(i) (IV)
Dieses Verfahren, sowie ein Verfahren zur Herstellung von Cyclopropancarbonsäuren der Formel (IV) durch sukzessive Halofluorierung und Reduktion des Enollactons (II) sind ebenfalls Gegenstand der Erfindung.This process and a process for the preparation of cyclopropanecarboxylic acids of the formula (IV) by successive halofluorination and reduction of the enollactone (II) are also the subject of the invention.
Als Reduktionsmittel kommen alle herkömmlichen Reduktionsmittel, wie Mg, Fe, Zn, Sn , AI, Bu3SnH, LiAIH4, in Frage (siehe z.B. J. Am. Chem. Soc, 121 , 4155, 1990). Die Cyclopropancarbonsäure der Formel (IV) kann als Gemisch von zwei geometrischen Isomeren entstehen.All conventional reducing agents, such as Mg, Fe, Zn, Sn, Al, Bu 3 SnH, LiAIH 4 , are suitable as reducing agents (see, for example, J. Am. Chem. Soc. 121, 4155, 1990). The cyclopropanecarboxylic acid of the formula (IV) can be formed as a mixture of two geometric isomers.
Die Säure der Formel (IV) oder ein funktionelles Derivat der Säure können mit einer Verbindung der Formel (V),The acid of the formula (IV) or a functional derivative of the acid can be reacted with a compound of the formula (V),
R - X (V)R - X (V)
worin X eine Abgangsgruppe, vorzugsweise OH, Cl, Br, I, OTosyl (Tosyl: p- Toluolsulfonyl) oder OMesyl (Mesyl: Methansulfonyl), und R den Rest eines Alkohols aus der Pyrethroidreihe bedeutet, zu einer Verbindung der Formel (VI) umgesetzt werden,wherein X is a leaving group, preferably OH, Cl, Br, I, OTosyl (tosyl: p-toluenesulfonyl) or OMesyl (mesyl: methanesulfonyl), and R is the rest of an alcohol from the pyrethroid series, converted to a compound of formula (VI) become,
(VI) wobei R die oben genannte Bedeutung hat.(VI) where R has the meaning given above.
Bevorzugt hat R dabei die in Formel (I) in WO-A 99/32426 genannten Bedeutungen. Auf diese Schrift wird hiermit ausdrücklich Bezug genommen; sie gilt durch Zitat als Bestandteil dieser Beschreibung.R preferably has the meanings given in formula (I) in WO-A 99/32426. Reference is hereby expressly made to this document; by quotation it is part of this description.
Die Ester der Formel (VI) können durch Veresterung entsprechender Carbonsäuren (oder ihrer reaktionsfähigen Derivate) mit Alkoholen (oder ihren reaktionsfähigen Derivaten) nach der DCC-Methode (DCC = Dicyclohexylcarbodiimid) oder analog DE-A 44 27 198 erhalten werden. Die entsprechenden Carbonsäuren und Alkohole sind bekannt oder können in Analogie zu bekannten Verfahren hergestellt werden.The esters of the formula (VI) can be obtained by esterifying corresponding carboxylic acids (or their reactive derivatives) with alcohols (or their reactive derivatives) by the DCC method (DCC = dicyclohexylcarbodiimide) or analogously to DE-A 44 27 198. The corresponding carboxylic acids and alcohols are known or can be prepared analogously to known processes.
Als reaktionsfähige Derivate der genannten Carbonsäuren eignen sich insbesondere die Säurehalogenide, vor allem die Chloride und Bromide, ferner die Anhydride, z.B. auch gemischte Anhydride, Azide oder Ester, insbesondere Alkylester mit 1-4 C- Atomen in der Alkylgruppe.Suitable reactive derivatives of the carboxylic acids mentioned are in particular the acid halides, especially the chlorides and bromides, and also the anhydrides, e.g. also mixed anhydrides, azides or esters, in particular alkyl esters with 1-4 C atoms in the alkyl group.
Als reaktionsfähige Derivate von Alkoholen kommen insbesondere die entsprechenden Metallalkoholate, vorzugsweise eines Alkalimetalls, wie Natrium oder Kalium, in Betracht.Suitable reactive derivatives of alcohols are in particular the corresponding metal alcoholates, preferably an alkali metal such as sodium or potassium.
Die Veresterung wird vorteilhaft in Gegenwart eines inerten Lösungsmittels durchgeführt. Gut geeignet sind insbesondere Ether, wie Diethylether, Di-n- butylether, THF (Tetrahydrofuran), Dioxan oder Anisol, Ketone, wie Aceton, Butanon oder Cyclohexanon, Amide, wie DMF (NiN-Dimethylformamid) oder Phosphorsäurehexamethyltriamid, Kohlenwasserstoffe, wie Benzol, Toluol oder Xylol, Halogenkohienwasserstoffe, wie Tetrachlorkohlenstoff, Dichlormethan oder Tetrachlorethylen, und Sulfoxide, wie Dimethylsulfoxid oder Sulfolan. Gegenstand der Erfindung ist daher auch ein Verfahren zur Herstellung einer Verbindung der Formel (VI),The esterification is advantageously carried out in the presence of an inert solvent. Particularly suitable are ethers such as diethyl ether, di-n-butyl ether, THF (tetrahydrofuran), dioxane or anisole, ketones such as acetone, butanone or cyclohexanone, amides such as DMF (NiN-dimethylformamide) or phosphoric acid hexamethyl triamide, hydrocarbons such as benzene, Toluene or xylene, halogenated hydrocarbons such as carbon tetrachloride, dichloromethane or tetrachlorethylene, and sulfoxides such as dimethyl sulfoxide or sulfolane. The invention therefore also relates to a process for the preparation of a compound of the formula (VI),
(VI)(VI)
wobei R den Rest eines Alkohols aus der Pyrethroidreihe bedeutet, enthaltend die Schritte:where R represents the remainder of an alcohol from the pyrethroid series, comprising the steps:
a) Umsetzung eines Enollactons der Formel (II) mit einem Halogenfluorierungsmittel zu einer Verbindung der Formel (I), b) Umsetzung der Verbindung der Formel (I) mit einem Reduktionsmittel zu einer Cyclopropancarbonsäure der Formel (IV) und c) Veresterung der Cyclopropancarbonsäure der Formel (VI) mit einer Verbindunga) reaction of an enollactone of the formula (II) with a halogen fluorinating agent to give a compound of the formula (I), b) reaction of the compound of the formula (I) with a reducing agent to give a cyclopropanecarboxylic acid of the formula (IV) and c) esterification of the cyclopropanecarboxylic acid Formula (VI) with a compound
(V),(V)
R - X (V)R - X (V)
wobei X und R die oben genannteen Bedeutungen haben.where X and R have the meanings given above.
Bevorzugt nach dem erfindungsgemäßen Verfahren hergestellte Verbindungen der Formel (VI) sind die Beispiele 1 bis 33 der WO-A 99/32426, auf die hier ausdrücklich Bezug genommen wird; sie gelten durch Zitat als Bestandteil dieser Beschreibung.Preferred compounds of the formula (VI) prepared by the process according to the invention are Examples 1 to 33 of WO-A 99/32426, to which reference is expressly made here; by quotation they are part of this description.
Die Synthese der entsprechenden Alkoholreste findet sich in WO-A 99/32426 und der dort aufgeführten Literatur.The synthesis of the corresponding alcohol residues can be found in WO-A 99/32426 and the literature listed there.
Weiterhin Gegenstand der Erfindung ist die Verwendung von Verbindungen der Formel (I) als Zwischenprodukte bei der Herstellung von Pyrethroiden, vorzugsweise solcher der Formel (VI). Auf den Inhalt der deutschen Patentanmeldung 199 54 160.4, deren Priorität die vorliegende Anmeldung beansprucht, sowie der beiliegenden Zusammenfassung wird hiermit ausdrücklich Bezug genommen; er gilt durch Zitat als Bestandteil dieser Beschreibung.The invention furthermore relates to the use of compounds of the formula (I) as intermediates in the preparation of pyrethroids, preferably those of the formula (VI). We expressly refer to the content of German patent application 199 54 160.4, the priority of which is claimed by the present application, and the enclosed abstract; by quotation it is part of this description.
Die Erfindung wird durch die Beispiele näher erläutert, ohne sie dadurch einzuschränken. The invention is illustrated by the examples without restricting it.
BeispieleExamples
Halofluorierung (allgemeine Methode)Halofluorination (general method)
In einem Dreihalskolben mit Blasenzähler, Thermometer, mechanischem Rührer und Tropftrichter wurden unter N2 Halogenierungsmittei und Fluorid in einem Lösemittel vorgelegt und das Enollacton bei einer bestimmten Temperatur zugegeben. Nach beendeter Zugabe wurde die Lösung noch bestimmte Zeit nachgerührt, dann wurde die Reaktion durch Zugabe von Wasser und Na2SO3 beendet. Das Produkt wurde mit Diethylether extrahiert. Die Etherphase wurde mit Wasser gewaschen, mit MgSO4 getrocknet, filtriert, eingeengt und der Rückstand gereinigt. Gemäß dieser Methode wurden erhalten:In a three-necked flask with bubble counter, thermometer, mechanical stirrer and dropping funnel, halogenating agent and fluoride in a solvent were placed under N 2 and the enollactone was added at a certain temperature. After the addition had ended, the solution was stirred for a certain time, then the reaction was terminated by adding water and Na 2 SO 3 . The product was extracted with diethyl ether. The ether phase was washed with water, dried with MgSO 4 , filtered, concentrated and the residue was purified. According to this method, the following were obtained:
Isomer AIsomer A
(1 R,4R,5S,6S)-5-Brom-4-fluor-4,7,7-trimethyl-3-oxabicycio[4.1.0]heptan-2-on(1 R, 4R, 5S, 6S) -5-bromo-4-fluoro-4,7,7-trimethyl-3-oxabicycio [4.1.0] heptan-2-one
Smp. 94°C.Mp 94 ° C.
1H- NMR (CDCI3, 300 MHz) : 1.23 (s, 3H, CH3); 1.3 (s, 3H, CH3); 1.8 (m, 2H); 1.90(d, 1 H NMR (CDCI 3 , 300 MHz): 1.23 (s, 3H, CH 3 ); 1.3 (s, 3H, CH 3); 1.8 (m, 2H); 1.90 (d,
3J =19.5 Hz , 3H, CH3I); 4.0 (d.d, J=9; 3 Hz,1 H) ppm 3 J = 19.5 Hz, 3H, CH 3I ); 4.0 (dd, J = 9; 3 Hz, 1 H) ppm
19F NMR (CDCI3, 300 MHz): -100.7 (d.qw) ppm 19 F NMR (CDCI 3 , 300 MHz): -100.7 (d.qw) ppm
Isomer BIsomer B
(1R,4S,5S,6S)-5-Brom-4-fluor-4,7,7-trimethyl-3-oxabicyclo[4.1.0]heptan-2-on(1R, 4S, 5S, 6S) -5-bromo-4-fluoro-4,7,7-trimethyl-3-oxabicyclo [4.1.0] heptan-2-one
1H- NMR (CDCI3, 300 MHz): 1.30 (s, 3H, CH3); 1.4 (s, 3H, CH3); 1.84 (d, 3J =19 Hz , 1 H NMR (CDCI 3 , 300 MHz): 1.30 (s, 3H, CH 3 ); 1.4 (s, 3H, CH 3); 1.84 (d, 3 J = 19 Hz,
3H, CH3>); 1.94 (m, 2H); 4.8 (m, 1 H) ppm3H, CH 3> ); 1.94 (m, 2H); 4.8 (m, 1H) ppm
19F NMR (CDCI3, 300 MHz): -79.7 (d.qw, J 38.2; 19 Hz) ppm 19 F NMR (CDCI 3 , 300 MHz): -79.7 (d.qw, J 38.2; 19 Hz) ppm
Isomer C (1R,4S,5R,6S)-5-Brom-4-fluor-4,7,7-trimethyl-3-oxabicyclo[4.1.0]heptan-2-on 19 F NMR (CDCI3, 300 MHz): -138.7 (d.qw, J 38.2; 19 Hz) ppmIsomer C (1R, 4S, 5R, 6S) -5-bromo-4-fluoro-4,7,7-trimethyl-3-oxabicyclo [4.1.0] heptan-2-one 19 F NMR (CDCI 3 , 300 MHz): -138.7 (d.qw, J 38.2; 19 Hz) ppm
Tabelle 1 : Halofluorierung von EnollactonTable 1: Halofluorination of enollactone
'Ausbeute des Isomerengemisches. NCS = N-Chlorsuccinimid 'Yield of the isomer mixture. NCS = N-chlorosuccinimide
NBS = N-BromsuccinimidNBS = N-bromosuccinimide
DIPE = DiispropyletherDIPE = diispropyl ether
DICIE = DichlorethanDICIE = dichloroethane
DBH = N,N-Dibrom-5,5-dimethylhydantoinDBH = N, N-dibromo-5,5-dimethylhydantoin
Py = PyridinPy = pyridine
Beispiel 12 (1 R-cis)-3-(E)-2-Fluorpropenyl)-2,2-dimethylcyclopropancarbonsäure und (1 R,cis)-3-[(Z)-2-Fluorpropenyl)-2,2- dimethylcyclopropancarbonsäure.Example 12 (1 R-cis) -3- (E) -2-fluoropropenyl) -2,2-dimethylcyclopropanecarboxylic acid and (1 R, cis) -3 - [(Z) -2-fluoropropenyl) -2,2-dimethylcyclopropanecarboxylic acid ,
In einem Dreihalskolben mit Blasenzähler, Thermometer und mechanischem Rührer wurden 25.2 g (0.1 mol) Isomerengemisch von 5-Brom-4-Fluor-4,7,7- trimethyl-7-fluor-3-oxabicyclo[4.1.0]heptan-2-on und 150 ml Essigsäure vorgelegt, und 12.6 g (0.2 Mol) Zinkstaub wurden portionsweise während 1 h zugegeben. Nach beendeter Zugabe wurde die Lösung noch 4 h nachgerührt, restliches Zn abfiltriert und die Lösung mit 200 ml Eiswasser versetzt. Das Produkt wurde mit Diethylether extrahiert. Die etherische Phase wurde mit Wasser gewaschen, getrocknet (MgSO4), filtriert und eingeengt. Die Isolierung der Säuren erfolgte durch Chromatographie. Ausbeute 21 %, Öl.25.2 g (0.1 mol) of a mixture of isomers of 5-bromo-4-fluoro-4,7,7-trimethyl-7-fluoro-3-oxabicyclo [4.1.0] heptane-2 was added to a three-necked flask equipped with a bubble counter, thermometer and mechanical stirrer -on and 150 ml of acetic acid, and 12.6 g (0.2 mol) of zinc dust were added in portions over 1 h. After the addition had ended, the solution was stirred for a further 4 h, the remaining Zn was filtered off and the solution was mixed with 200 ml of ice water. The product was extracted with diethyl ether. The ethereal phase was washed with water, dried (MgSO 4 ), filtered and concentrated. The acids were isolated by chromatography. Yield 21%, oil.
(1 R-cis)-3-(E)-2-Fluorpropenyl)-2,2-dimethylcyclopropancarbonsäure(1 R-cis) -3- (E) -2-fluoropropenyl) -2,2-dimethylcyclopropanecarboxylic acid
1H-NMR (CDCI3, 300 MHz): 1.22 (d, 6H); 1.7 (t, 2H); 1.92 (d, 3H); 5.4 (dd, 1 H) ppm 1 H NMR (CDCI 3 , 300 MHz): 1.22 (d, 6H); 1.7 (t, 2H); 1.92 (d, 3H); 5.4 (dd, 1H) ppm
19F NMR (CDCI3, 300 MHz): -93.3 (d.qw, J=21 ; 19 Hz) ppm 19 F NMR (CDCI 3 , 300 MHz): -93.3 (d.qw, J = 21; 19 Hz) ppm
(1 R-cis)-3-(Z)-2-Fluorpropenyl)-2,2-dimethylcyclopropancarbonsäure(1 R-cis) -3- (Z) -2-fluoropropenyl) -2,2-dimethylcyclopropanecarboxylic acid
1H-NMR (CDCI3, 300 MHz): 1.24 (d, 6H); 1.7 (m,1 H); 1.96 (d, 3H); 2.2 (m, 1 H); 4.86 1 H NMR (CDCI 3 , 300 MHz): 1.24 (d, 6H); 1.7 (m, 1H); 1.96 (d, 3H); 2.2 (m, 1H); 4.86
(dd, 1 H)(dd, 1 H)
19F NMR (CDCI3, 300 MHz): -103.7 (d.qw, J=39; 18 Hz) ppm 19 F NMR (CDCI 3 , 300 MHz): -103.7 (d.qw, J = 39; 18 Hz) ppm

Claims

Patentansprüche claims
1. Verbindung der Formel (I),1. compound of formula (I),
wobei Hai Cl, Br, oder I bedeutet.where Hai means Cl, Br, or I.
2. Verbindung der Formel (I) nach Anspruch 1 , wobei Hai Br bedeutet.2. A compound of formula (I) according to claim 1, wherein shark means Br.
3. Verwendung von Verbindungen der Formel (I) nach Anspruch 1 oder 2 als Zwischenprodukte bei der Synthese von Pyrethroiden.3. Use of compounds of formula (I) according to claim 1 or 2 as intermediates in the synthesis of pyrethroids.
4. Verfahren zur Herstellung einer Verbindung der Formel (I) nach Anspruch 1 oder 2, wobei man ein Endlacton der Formel (II) mit einem Halogenfluorierungsmittel („HalF") umsetzt,4. A process for the preparation of a compound of formula (I) according to claim 1 or 2, wherein a final lactone of formula (II) is reacted with a halogen fluorinating agent ("HalF"),
wobei Hai Cl, Br oder I bedeutet. where shark means Cl, Br or I.
5. Verfahren zur Herstellung einer cis-Cyclopropancarbonsäure der Formel (IV),5. A process for the preparation of a cis-cyclopropanecarboxylic acid of the formula (IV),
(I) (IV)(I) (IV)
wobei man die Verbindung der Formel (I) gemäß Anspruch 1 mit einem Reduktionsmittel umsetzt.wherein the compound of formula (I) according to claim 1 is reacted with a reducing agent.
6. Verfahren zur Herstellung einer Verbindung der Formel (VI),6. Process for the preparation of a compound of formula (VI),
wobei R den Rest eines Alkohols aus der Pyrethroidreihe bedeutet, enthaltend die Schritte: where R represents the remainder of an alcohol from the pyrethroid series, comprising the steps:
a) Umsetzung eines Endollactons der Formel (II) mit einem Halogenfluierungsmittel zu einer Verbindung der Formel (I) gemäß Anspruch 1 oder 2,a) reaction of an endollactone of the formula (II) with a halogen fluorinating agent to give a compound of the formula (I) according to claim 1 or 2,
b) Umsetzung der Verbindung der Formel (I) mit einem Reduktionsmittel zu einer Cyclopropyancarbonsäure der Formel (IV) gemäß Anspruch 5 undb) reaction of the compound of formula (I) with a reducing agent to a cyclopropyanecarboxylic acid of formula (IV) according to claim 5 and
c) Veresterung der Cyclopropancarbonsäure der Formel (IV) mit einer Verbindung (V),c) esterification of the cyclopropanecarboxylic acid of the formula (IV) with a compound (V),
R - X (V) wobei X eine Abgangsgruppe und R den Rest eines Alkohols aus der Pyrethroidreihe bedeutet. R - X (V) where X is a leaving group and R is the rest of an alcohol from the pyrethroid series.
EP00974498A 1999-11-10 2000-11-02 5-halo-4-fluoro-4,7,7-trimethyl-3-oxabicyclo 4.1.0]heptane-2-ones, method for their production and their use in the production of cyclopropane carboxylic acids Withdrawn EP1230233A1 (en)

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DE19954160 1999-11-10
PCT/EP2000/010779 WO2001034592A1 (en) 1999-11-10 2000-11-02 5-halo-4-fluoro-4,7,7-trimethyl-3-oxabicyclo[4.1.0]heptane-2-ones, method for their production and their use in the production of cyclopropane carboxylic acids

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IL56400A (en) * 1976-09-21 1984-07-31 Roussel Uclaf Alpha-cyano-3-phenoxybenzyl and 3,4,5,6-tetrahydrophthalimidomethyl esters of 2,2-dimethyl-3-(1,2,2,2-tetrahaloethyl)cyclopropane-carboxylic acids,process for preparing them and insecticidal,acaricidal and nematocidal compositions containing them
FR2396006A1 (en) * 1977-06-27 1979-01-26 Roussel Uclaf NEW CYCLOPROPANIC CORE COMPOUNDS, PREPARATION PROCESS AND APPLICATION TO THE PREPARATION OF CYCLOPROPANIC DERIVATIVES WITH DIHALOVINYL CHAIN
US4132717A (en) * 1977-08-09 1979-01-02 Shell Oil Company Enol lactone intermediate for the preparation of (1R,cis)-caronaldehydic acid
US4235780A (en) * 1979-11-01 1980-11-25 Fmc Corporation Derivatives of 2H-pyran-2-one
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FR2772759B1 (en) 1997-12-22 2001-03-09 Hoechst Schering Agrevo Sa NOVEL DERIVATIVES OF 2,2-DIMETHYL 3- (2-FLUOROVINYL) CYCLOPROPANE CARBOXYLIC ACID, THEIR PREPARATION PROCESS AND THEIR USE AS PESTICIDES

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Free format text: 5-HALO-4-FLUORO-4,7,7-TRIMETHYL-3-OXABICYCLO 4.1.0 HEPTANE-2-ONES, METHOD FOR THEIR PRODUCTION AND THEIR USE IN THE PRODUCTION OF CYCLOPROPANE CARBOXYLIC ACIDS