WO2000040535A1 - Procede de preparation d'un ether de type benzylique - Google Patents
Procede de preparation d'un ether de type benzylique Download PDFInfo
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- WO2000040535A1 WO2000040535A1 PCT/FR2000/000024 FR0000024W WO0040535A1 WO 2000040535 A1 WO2000040535 A1 WO 2000040535A1 FR 0000024 W FR0000024 W FR 0000024W WO 0040535 A1 WO0040535 A1 WO 0040535A1
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- 0 CCC(C(CC1)CC1C1*C1)C1(C2)C2=C1 Chemical compound CCC(C(CC1)CC1C1*C1)C1(C2)C2=C1 0.000 description 4
- JDGHQAQZXIFLTR-UHFFFAOYSA-N CCC(C)(C1C(C)CCC1)C1(C)CCC(C)(C)CCC1 Chemical compound CCC(C)(C1C(C)CCC1)C1(C)CCC(C)(C)CCC1 JDGHQAQZXIFLTR-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/45—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by condensation
- C07C45/46—Friedel-Crafts reactions
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/09—Preparation of ethers by dehydration of compounds containing hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/18—Preparation of ethers by reactions not forming ether-oxygen bonds
- C07C41/30—Preparation of ethers by reactions not forming ether-oxygen bonds by increasing the number of carbon atoms, e.g. by oligomerisation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/582—Recycling of unreacted starting or intermediate materials
Definitions
- the present invention relates to a process for the preparation of a benzyl ether from an aromatic compound.
- benzyl type ether is meant a compound comprising at least one aromatic carbocycle or heterocycle in which a hydrogen atom directly linked to the aromatic nucleus is replaced by an ether function.
- the object of the present invention is to provide a process making it possible to obtain a benzyl type ether, from an aromatic compound, making it possible to avoid the stated disadvantages.
- the subject of the present invention is a process for the preparation of a benzyl ether from an aromatic compound characterized in that it consists:
- a first step to carry out the acylation of an aromatic compound by reaction of said compound with an acylating agent, in the presence of an effective amount of a zeolite or of a Friedel-Crafts catalyst leading to a ketone compound,
- the first step is the acylation of an aromatic compound by reaction of the latter with an acylating agent.
- aromatic compound means the conventional concept of aromaticity as defined in literature, in particular by Jerry MARCH, Advanced Organic Chemistry, 4 th edition, John Wiley and Sons, 1992, pp. 40 and following.
- acylating agent is used generically and designates any agent allowing the connection to an aromatic cycle of a carbonyl group, and in particular benzoylating agents.
- the subject of the present invention is a process for acylating an aromatic compound corresponding to the general formula (I):
- - A symbolizes the remainder of a cycle forming all or part of a carbocyclic or heterocyclic, aromatic, monocyclic or polycyclic system: said cyclic residue being able to carry a group R representing a hydrogen atom or one or more substituents, identical or different , - n represents the number of substituents on the cycle.
- the invention applies in particular to aromatic compounds corresponding to formula (I) in which A is the residue of a cyclic compound, preferably having at least 4 atoms in the ring, preferably 5 or 6, optionally substituted , and representing at least one of the following cycles:. an aromatic, monocyclic or polycyclic carbocycle,
- an aromatic, monocyclic or polycyclic heterocycle comprising at least one of the heteroatoms O, N and S,
- residue A optionally substituted represents, the remainder: 1 ° - of an aromatic, monocyclic or polycyclic carbocyclic compound.
- carbocyclic polycyclic compound means:. a compound consisting of at least 2 aromatic carbocycles and forming between them ortho- or ortho- and pericondensed systems,. a compound consisting of at least 2 carbocycles of which only one of them is aromatic and forming between them ortho- or ortho- and pericondensed systems. 2 ° - of a heterocyclic aromatic, monocyclic or polycyclic compound.
- heterocyclic poiycyclic compound we define:.
- a compound consisting of at least 2 heterocycles containing at least one heteroatom in each cycle including at least one of the two cycles is aromatic and forms between them ortho- or ortho- and pericondensed systems,.
- alkylene or alkylidene group having from 1 to 4 carbon atoms, preferably a methylene or isopropylidene group,
- R Q represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms, a cyclohexyl or phenyl group.
- a monocyclic, carbocyclic, aromatic compound such as, for example, benzene, toluene, isobutylbenzene, anisole, thioanisole, phenetole or veratrole, guaiacol, guetol,
- naphthalene 2-methoxynaphthalene
- a polycyclic, non-condensed, carbocyclic, partially aromatic compound such as, for example, cyclohexylbenzene
- a monocyclic, heterocyclic, aromatic compound such as, for example, pyridine, furan, thiophene,
- a poiycyclic, condensed, aromatic, partially heterocyclic compound such as, for example, quinoline, indole or benzofuran
- a polycyclic, non-condensed, aromatic, partially heterocyclic compound such as, for example, phenylpyridines, naphthylpyridines,
- - a polycyclic, condensed, partially aromatic, partially heterocyclic compound, such as, for example, tetrahydroquinoline, - a polycylic, non-condensed, partially aromatic, partially heterocyclic compound, such as, for example, cyclohexylpyridine.
- an aromatic compound of formula (I) in which A represents an aromatic ring, preferably a benzene or naphthalene ring.
- the aromatic compound of formula (I) can carry one or more substituents.
- the number of substituents present on the cycle depends on the carbon condensation of the cycle and on the presence or not of unsaturations on the cycle.
- the maximum number of substituents likely to be carried by a cycle is easily determined by a person skilled in the art.
- linear or branched alkenyl groups preferably having from 2 to 6 carbon atoms and even more preferably from 2 to 4 carbon atoms
- - linear or branched haloalkyl groups preferably having from 1 to 6 carbon atoms and from 1 to 13 halogen atoms and even more preferably from 1 to 4 carbon atoms and from 1 to 9 halogen atoms
- cycloalkyl groups having from 3 to 6 carbon atoms, preferably the cyclohexyl group, the phenyl group,
- R represents a linear or branched alkyl group having from 1 to 6 carbon atoms and even more preferably from 1 to 4 carbon atoms or the phenoxy group; alkenyloxy groups, preferably an allyloxy group, - -N- groups (R2> 2 in which the identical or different R2 groups represent a hydrogen atom, a linear or branched alkyl group having from 1 to 6 carbon atoms and even more preferably from 1 to 4 carbon atoms or a phenyl group, - -NH-CO-R2 groups in which the R2 group has the meaning given above,
- halogen atom preferably a fluorine atom
- two R groups and the two successive atoms of the aromatic ring can be linked together by an alkylene, alkenylene or alkenylidene group having from 2 to 4 carbon atoms to form a saturated, unsaturated or aromatic heterocycle having 5 to 7 carbon atoms.
- One or more carbon atoms can be replaced by another heteroatom, preferably oxygen or sulfur.
- the R groups can represent a methylenedioxy or ethylenedioxy group or a methylenedithio or ethylenedithio group.
- the present invention applies very particularly to aromatic compounds corresponding to formula (I) in which the group or groups R represent an electron-donor group.
- Electro-donor group means a group as defined by H.C.
- - A symbolizes the rest of a cycle forming all or part of a carbocyclic or heterocyclic, aromatic, monocyclic or poiycyclic system: said cyclic residue being able to carry a group R representing an atom of hydrogen or one or more identical or different electron-donor substituents,
- - n represents the number of substituents on the cycle.
- a linear or branched alkyl group having from 1 to 6 carbon atoms, preferably from 1 to 4 carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl,
- a linear or branched alkenyl group having from 2 to 6 carbon atoms, preferably from 2 to 4 carbon atoms, such as vinyl, allyl, a cyclohexyl, phenyl or benzyl group,
- a linear or branched alkoxy group having from 1 to 6 carbon atoms, preferably from 1 to 4 carbon atoms such as methoxy, ethoxy, propoxy, isopropoxy, butoxy groups, an alkenyloxy group, preferably an allyloxy group or a phenoxy group, a hydroxyl group,
- R2 a substituted amino group -N- (R2) 2 in which R2 has the meaning given above,
- R groups can be linked and form alkylenedioxy or alkylenedithio groups, preferably a methylenedioxy, ethylenedioxy, methylenedithio or ethylenedithio group.
- n is a number less than or equal to 4, preferably equal to 1 or 2.
- the process of the invention applies very particularly to effect the acylation of aromatic ethers and thioethers.
- - Y represents an oxygen or sulfur atom
- - A symbolizes the rest of a cycle forming all or part of an aromatic, monocyclic or polycyclic carbocyclic system, system comprising at least one group YR ': said cyclic residue being able to carry one or more substituents,
- - R represents one or more substituents, identical or different, - R 'represents a hydrocarbon group having from 1 to 24 carbon atoms, which can be an acyclic saturated or unsaturated, linear or branched aliphatic group; a saturated, unsaturated or aromatic, monocyclic or polycyclic cycloaliphatic group; a saturated or unsaturated, linear or branched aliphatic group, carrying a cyclic substituent,
- - n is a number less than or equal to 4.
- R ' represents both an acyclic or cycloaliphatic, saturated, unsaturated or aromatic aliphatic group as well as a saturated or unsaturated aliphatic group carrying a cyclic substituent.
- the aromatic ether or thioether which is involved in the process of the invention corresponds to the formula (D in which R 'represents an acyclic aliphatic group, saturated or unsaturated, linear or branched.
- R ′ represents a linear or branched alkyl group having from 1 to 12 carbon atoms, preferably from 1 to 6 carbon atoms: the hydrocarbon chain can possibly be interrupted by a heteroatom (for example, oxygen), by a functional group (for example -CO-) and / or carrying substituents (for example, one or more halogen atoms).
- a heteroatom for example, oxygen
- a functional group for example -CO-
- substituents for example, one or more halogen atoms
- acyclic, saturated or unsaturated, linear or branched aliphatic group may optionally carry a cyclic substituent.
- ring is preferably understood to mean a saturated, unsaturated or aromatic carbocyclic ring, preferably cycloaliphatic or aromatic, in particular cycloaliphatic ring comprising 6 carbon atoms in the ring or benzene.
- the acyclic aliphatic group can be linked to the cycle by a valential link, a heteroatom or a functional group and examples are given above.
- the ring can be optionally substituted and, by way of examples of cyclic substituents, it is possible, among others, to consider substituents such as R, the meaning of which is specified for formula (I ').
- R 'can also represent a saturated carbocyclic group or comprising 1 or 2 unsaturations in the ring, generally having from 3 to 8 carbon atoms, preferably 6 carbon atoms in the ring; said cycle possibly being substituted by substituents such as R.
- R 'can also represent an aromatic carbocyclic group, preferably monocyclic generally having at least 4 carbon atoms, preferably 6 carbon atoms in the ring; said ring possibly being substituted by substituents such as R.
- the remainder substituents such as R, the remainder
- A may represent the remainder of an aromatic, monocyclic carbocyclic compound having at least 4 carbon atoms and preferably 6 carbon atoms or the remainder of a polycyclic carbocyclic compound which may consist of at least 2 aromatic carbocycles and forming therebetween ortho- or ortho- and pericondensed systems or by at least 2 carbocycles of which at least one of them is aromatic and forming between them ortho- or ortho- and pericondensed systems. Mention may more particularly be made of a naphthalene residue.
- the remainder A can carry one or more substituents on the aromatic ring.
- R more preferably represents one of the following atoms or groups:
- alkyl group linear or branched, having from 1 to 6 carbon atoms, preferably from 1 to 4 carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl,
- a linear or branched alkoxy group having from 1 to 6 carbon atoms, preferably from 1 to 4 carbon atoms such as the methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy, tert-butoxy groups, - a halogen atom, preferably a fluorine, chlorine or bromine atom, a trifluoromethyl group.
- : - n is a number less than or equal to 4, preferably equal to 0 or 1
- the group R ′ represents an alkyl group, linear or branched, having from 1 to 6 carbon atoms, preferably from 1 to 4 carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl , tert-butyl or a phenyl group,
- a hydrogen atom a linear or branched alkyl group preferably having from 1 to 6 carbon atoms and even more preferably from 1 to 4 carbon atoms,
- a linear or branched alkenyl group preferably having from 2 to 6 carbon atoms and even more preferably from 2 to 4 carbon atoms
- a linear or branched haloalkyl group preferably having from 1 to
- R 1 represents a linear or branched alkyl group having from 1 to 6 carbon atoms and even more preferably from 1 to 4 carbon atoms or a phenyl group; an alkenyloxy group, preferably an allyloxy group,
- R2 a group -N- (R2) 2 in which the identical or different R2 groups represent a hydrogen atom, a linear or branched alkyl group having from 1 to 6 carbon atoms and even more preferably from 1 to
- a halogen atom preferably a fluorine atom,. a CF3 group.
- the groups R 'and R placed on two vicinal carbon atoms can form together and with the carbon atoms which carry them, a ring having 5 to 7 atoms, possibly including another heteroatom.
- the groups R ′ and R and the 2 successive atoms of the benzene ring can be linked together and form an alkylene, alkenylene or alkenylidene group having from 2 to 4 carbon atoms to form a saturated heterocycle , unsaturated or aromatic having 5 to 7 atoms.
- One or more carbon atoms can be replaced by another heteroatom, preferably oxygen or sulfur.
- the groups OR 'and R can represent a methylenedioxy or ethylenedioxy group and the groups SR' and R can represent a methylenedithio or ethylenedithio group.
- R ′ preferably represents an alkyl group, linear or branched, having from 1 to 6 carbon atoms, preferably a methyl or ethyl group or a phenyl group.
- the benzene nucleus carries one or more identical or different substituents R.
- R preferably represents an alkyl group, linear or branched, having from 1 to 6 carbon atoms, preferably a methyl or ethyl group; an alkoxy group, linear or branched, having from 1 to 4 carbon atoms, preferably a methoxy or ethoxy group.
- - R ' represents an alkyl group, linear or branched, having from 1 to 6 carbon atoms or a phenyl group, preferably a methyl or ethyl group,
- R represents an alkyl group, linear or branched, having from 1 to 6 carbon atoms, preferably a methyl or ethyl group; an alkoxy group, linear or branched, having from 1 to 4 carbon atoms, preferably a methoxy or ethoxy group.
- the groups YR 'and R form a methylenedioxy, ethylenedioxy, methylenedithio or ethylenedithio group.
- - amino aromatic compounds such as aniline, - phenolic compounds such as phenol, o-cresol, guaiacol, guetol, I '-naphthol, ⁇ -naphthol,
- - monoethers such as anisole, ethoxybenzene (phenetole), propoxybenzene, isopropoxybenzene, butoxybenzene, isobutoxybenzene, 1-methoxynaphthalene, 2-methoxynaphthalene, 2-ethoxynaphthalene; substituted monoethers such as 2-chloroan isolates, 3-chloroanisole, 2-bromoanisole, 3-bromoanisole, 2-methyian isolates, 3-methylanisole, 2-ethylanisole, 3-ethylanisole, 2- isopropylanisole, 3-isopropylanisole, 2-propylanisole, 3-propylanisole, 2-allylan isolate, 2-butylanisole, 3-butylanisole, 2-benzylanisole, 2-cyclohexylanisole, 1-bromo-2- ethoxybenzene, 1-bromo-3-ethoxybenzene, 1-chloro-2-ethoxybenzene
- - thioethers such as thioanisole, o-thiocresol, m-thiocresol, p-thiocresol, 2-thioethylnaphthalene, S-phenylthioacetate, 3- (methylmercapto) aniline, phenylthiopropionate.
- the compounds to which the process according to the invention applies more particularly advantageously are benzene, toluene, isobutylbenzene, anisole, phenetole, veratrole, 1,2-methylenedioxybenzene, 2-methoxynaphthalene and thioanisole.
- acylation reagent use is made of carboxylic acids and their derivatives, halides or anhydrides, preferably anhydrides.
- the acylation reagent more particularly corresponds to formula (II):
- R3 represents:. a saturated or unsaturated, linear or branched aliphatic group having from 1 to
- a halogen atom preferably a chlorine or bromine atom,. a hydroxyl group
- a group -0-CO-R 4 with R 4 identical or different from R 3 , having the same meaning as R3: R3 and R4 can together form a divalent aliphatic saturated or unsaturated group, linear or branched, having at least 2 atoms of carbon.
- R3 and R4 can together form a divalent aliphatic saturated or unsaturated group, linear or branched, having at least 2 atoms of carbon.
- R3 represents a linear or branched alkyl group having from 1 to 12 carbon atoms, preferably from 1 to 6 carbon atoms: the hydrocarbon chain can possibly be interrupted by a heteroatom (for example, oxygen), by a functional group (for example -CO-) and / or carrying a substituent (for example, a halogen or a group CF3).
- a heteroatom for example, oxygen
- a functional group for example -CO-
- a substituent for example, a halogen or a group CF3
- R3 preferably represents an alkyl group having from 1 to 4 carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl or a cycloalkyl group having from 3 to 8 carbon atoms, preferably a cyclopentyl or cyclohexyl group.
- R3 also represents an alkenyl group having from 2 to 10 carbon atoms, such as in particular, vinyl, propen-yl, buten-yl, penten-yl, hexen-yl, octen-yl, decen-yl.
- the group R 3 also preferably represents a phenyl group which may be optionally substituted. Any substituent can be present on the cycle as long as it does not interfere with the desired product.
- R3 also represents a phenylalkyl group having from 7 to 12 carbon atoms, preferably a benzyl group.
- substituents mention may be made, in particular:
- alkyl group linear or branched, having from 1 to 6 carbon atoms, preferably from 1 to 4 carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, a linear or branched alkoxy group having from 1 to 6 carbon atoms, preferably from 1 to 4 carbon atoms such as the methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy, tert-butoxy groups,
- - a hydroxyl group - a halogen atom, preferably a fluorine, chlorine or bromine atom.
- the preferred acylating agents are acid anhydrides. They correspond more particularly to formula (II) in which R3 and R4 are identical and represent an alkyl group having from 1 to 4 carbon atoms or a phenyl group.
- the acylating agent when it is an acid halide, it preferably corresponds to formula (II) in which X 'represents a chlorine atom and R3 represents a methyl or ethyl or phenyl group.
- the first step is the acylation of the aromatic compound of formula (I), preferably ((! '), (La) and even more preferably (a) using the compound of formula (II), in the presence of a catalyst.
- a first variant of the process of the invention consists in carrying out the acylation of the aromatic compound of formula (I), in the presence of a zeolitic catalyst.
- zeolite is meant a crystallized tectosilicate of natural or synthetic origin whose crystals result from the three-dimensional assembly of tetrahedral units of Si ⁇ 4 and TO4: T representing a trivalent element such as aluminum, gallium, boron, iron, preferably aluminum.
- T representing a trivalent element such as aluminum, gallium, boron, iron, preferably aluminum.
- the aluminosilicate type zeolites are the most common.
- Zeolites present within the crystal lattice, a system of cavities linked together by channels of a well-defined diameter called pores.
- Zeolites can have a network of one-dimensional, two-dimensional or three-dimensional channels.
- Synthetic zeolites are entirely suitable for implementing the invention.
- Examples of synthetic zeolites with a one-dimensional network include, among others, zeolite ZSM-4, zeolite L, zeolite ZSM-12, zeolite ZSM-22, zeolite ZSM-23, zeolite ZSM-48.
- zeolites with a two-dimensional network By way of examples of zeolites with a two-dimensional network preferably used, mention may be made of mordenite, ferrierite.
- the zeolites with three-dimensional lattice one can name more particularly, the zeolite ⁇ , the zeolite Y, the zeolite X, the zeolite ZSM-5, the zeolite ZSM-11, the offerite.
- the zeolite L with an Si / Ai molar ratio of 1.5 to 3.5
- the mordenite with an Si / Ai molar ratio of 5 to 100, preferably from 5 to
- zeolites with an Si / Ai molar ratio greater than 8, preferably between 10 and 100, and even more preferably between 12 and 50,
- - Y zeolites in particular the zeolites obtained after dealumination treatment (for example hydrotreatment, washing with hydrochloric acid or treatment with SiCLj) and mention may more particularly be made of US-Y zeolites with a Si / molar ratio Ai greater than 2, preferably between 4 and 60;
- the mesoporous zeolite of MCM type more particularly MCM-22 and MCM-41 with an Si / Al molar ratio of between 10 and 100, preferably between 15 and 40.
- the zeolites are advantageously used in acid form.
- zeolites use is preferably made in the process of the invention of the mordenite, ⁇ or Y zeolites in acid form.
- zeolites used in the process of the invention are known products described in the literature [cf. Atlas of zeolites structure types by W. M. Meier and D. H. Oison published by the Structure Commission of the International Zeolite Association (1978)].
- the zeolite constitutes the catalytic phase. It can be used alone or mixed with a mineral matrix.
- the term “catalyst” will denote the catalyst produced entirely from a zeolite or from a mixture with a matrix prepared according to techniques known to those skilled in the art.
- the matrix can be chosen from metal oxides, such as aluminum, silicon and / or zirconium oxides, or also from clays and more particularly, kaolin, talc or montmorillonite.
- the active phase content represents from 5 to 100% of the weight of the catalyst.
- the catalysts can be in different forms in the process of the invention: powder, shaped products such as granules (for example, extruded or balls), pellets, which are obtained by extrusion, molding, compacting or any other type of known process.
- powder shaped products such as granules (for example, extruded or balls), pellets, which are obtained by extrusion, molding, compacting or any other type of known process.
- granules for example, extruded or balls
- pellets which are obtained by extrusion, molding, compacting or any other type of known process.
- the acylation reaction is advantageously carried out in the liquid phase comprising the aromatic compound and the acylating agent, in the presence of the catalyst.
- One of the starting reagents can serve as reaction solvent but it is also possible to use an organic solvent.
- An organic solvent is chosen, which is less activated than the starting substrate and which preferably dissolves it.
- solvents suitable for the present invention there may be mentioned in particular aliphatic or aromatic hydrocarbons, halogenated or not, aliphatic, cycloaliphatic or aromatic ether-oxides.
- aliphatic hydrocarbons there may be mentioned more particularly paraffins such as in particular, hexane and cyclohexane, aromatic hydrocarbons and more particularly aromatic hydrocarbons such as in particular benzene, toluene, xylenes, cumene , petroleum fractions consisting of a mixture of alkylbenzenes, in particular the Solvesso® type fractions.
- perchlorinated hydrocarbons such as in particular tetrachlorethylene, hexachloroethane; partially chlorinated hydrocarbons such as 1, 2-dichloroethane, dichlorobenzene.
- organic solvents the aliphatic, cycloaliphatic or aromatic ether-oxides and, more particularly, dipropyl ether, diisopropyl ether, dibutyl ether, methyl tert-butyl ether, dimethyl ether of ethylene glycol (or glyme), dimethyl ether of diethylene glycol (or diglyme); phenyl oxide; dioxane, tetrahydrofuran (THF).
- dipropyl ether diisopropyl ether
- dibutyl ether methyl tert-butyl ether
- dimethyl ether of ethylene glycol or glyme
- dimethyl ether of diethylene glycol (or diglyme) dimethyl ether of diethylene glycol (or diglyme)
- phenyl oxide dioxane, tetrahydrofuran (THF).
- nitro compounds such as, for example, nitromethane, nitroethane, 1-nitropropane, 2- nitropropane or their mixtures, nitrobenzene; alphatic or aromatic nitriies such as acetonitrile, itri propion, benzonitrile, benzyl cyanide; linear or cyclic carboxamides such as N, N-dimethylacetamide (DMAC), N, N-diethylacetamide, dimethylformamide (DMF), diethylformamide or 1-methyl-2-pyrrolidinone (NMP); dimethylsu If oxide (DMSO); tetramethylenesulfone (sulfolane); hexamethylphosphotriamide (HMPT).
- DMAC N-dimethylacetamide
- DMF N-diethylacetamide
- DMF dimethylformamide
- NMP 1-methyl-2-pyrrolidinone
- DMSO dimethylsu If oxide
- the preferred solvents are: dichloroethane, dichlorobenzene, dimethyl ether of ethylene glycol (or glyme), dimethyl ether of diethylene glycol (or diglyme), dioxane.
- the starting substrate is used as the reaction solvent.
- the aromatic compound is reacted with an acylating agent, optionally in the presence of a reaction solvent as defined and in the presence of a zeolitic catalyst.
- the ratio between the number of moles of aromatic compound and the number of moles of acylating agent can vary because the substrate can serve as a reaction solvent.
- the ratio can range from 0.1 to 10, and is preferably between 0.5 and 4.0.
- the amount of catalyst which is used in the process of the invention can vary within wide limits.
- the catalyst may represent, by weight relative to the aromatic compound used, from 0.01 to 50%, preferably from 5 to 25%.
- these catalyst / aromatic compound ratios are meaningless and at a given time, there may be an excess weight of catalyst relative to the starting aromatic compound.
- the quantity of organic solvent used it is generally chosen so that the ratio between the number of moles of organic solvent and the number of moles of aromatic compound preferably varies between 0 and 100 and even more preferably between 0 and 50.
- the temperature at which the acylation reaction is carried out depends on the reactivity of the starting substrate and that of the acylating agent. It is between 20 ° C and 300 ° C, preferably between 40 ° C and 150 ° C.
- the reaction is carried out at atmospheric pressure but lower or higher pressures may also be suitable.
- the reagents there are no constraints with regard to the use of the reagents. They can be entered in any order. After bringing the reactants into contact, the reaction mixture is brought to the desired temperature.
- the other variant of the invention consists in carrying out the reaction continuously, in a tubular reactor comprising the solid catalyst placed in a fixed bed.
- the aromatic compound and the acylating agent can be introduced separately or as a mixture into the reactor. Said mixture is passed over a catalytic bed comprising at least one zeolite and then the reaction mixture from the catalytic bed is subjected to recirculation on a catalytic bed, in a number of times sufficient to obtain the desired substrate conversion rate.
- the acylation of an aromatic compound on a zeolite catalytic bed with recirculation of the reaction mixture is a technique described in PCT / FR 97/01066 published under the number WO 97/48665 which is incorporated by reference in the present application.
- the reaction mixture passes through the catalytic bed, preferably from bottom to top and at its outlet is returned to the reagent mixing zone in order to be recycled a number of times sufficient to obtain the desired conversion rate of the substrate, preferably, greater than 20%, and even more preferably between 50 and 100%.
- the substrate conversion rate is defined as the ratio between the number of moles of substrate transformed over the number of moles of substrate introduced.
- the linear speed of the liquid flow on the catalytic bed advantageously varies between 0.1 and 10 cm / s, preferably between 0.1 and 5 cm / s.
- the residence time of the material flow on the catalytic bed varies, for example, between 15 min and 10 h, and preferably between 30 min and 5 h.
- a liquid phase comprising the aromatic ketone compound which can be recovered in a conventional manner, by distillation or by recrystallization from an appropriate solvent, for example water or alcohols (methanol, ethanol), after preliminary elimination. excess reagents.
- Another variant of the invention consists in making use of a homogeneous catalysis by using Friedel-Crafts catalysts of organic or mineral type.
- salts comprising an organic counterion mention may in particular be made of acetate, propionate, benzoate, methanesulfonate, trifluoromethanesulfonate of metallic or metalloid elements of groups (IIIa), (IVa), (VIII), ( llb), (lllb), (IVb), (Vb) and (Vlb) of the Periodic Table of the Elements.
- salts comprising an inorganic counterion
- the salts used in the process of the invention are more particularly those of the elements of group (IIa) of the periodic classification preferably, magnesium; of the group (IIIa) preferably, scandium, yttrium and the lanthanides; preferably group (IVa), titanium, zirconium; preferably group (VIII), iron; preferably group (llb), zinc; preferably group (IIIb), boron, aluminum, gallium, indium; preferably group (IVb), tin; of the group (Vb) preferably, bismuth; of the group (Vlb) preferably tellurium.
- metal halides and preferably magnesium chloride, zirconium chloride, ferric chloride, zinc chloride, aluminum chloride, aluminum bromide, gallium chloride, indium chloride, stannic chloride, bismuth chloride, boron trifluoride.
- organic salts use is preferably made of the rare earth and / or bismuth salts of trifluoromethanesulfonic acid commonly known as "triflic acid".
- triflic acid trifluoromethanesulfonic acid
- rare earth is meant the lanthanides having an atomic number of
- rare earths are more particularly envisaged: lanthanum, ytterbium, lutetium and / or scandium.
- Rare earth triflates are known products which are described in the literature, in particular in US-A-3,615,169. They are generally obtained by reaction of rare earth oxide and trifluoromethanesulfonic acid.
- the bismuth salts of triflic acid described in patent application PCT / FR96 / 01488 can also be used in the process of the invention.
- the process of the invention can be carried out in an organic solvent, for example isopropyl ether, but one of the reagents can also be used as reaction solvent.
- the solvent is anhydrous.
- the ratio between the number of moles of the compound of formula (I) and the number of moles of acylating agent [compound of formula (II)] can vary because the substrate can serve as reaction solvent. Thus, the ratio can range from 1 to 10, preferably from 1 to 4.0.
- the amount of catalyst used is determined so that the ratio between the number of moles of catalyst and the number of moles of compound of formula (II) is preferably between 0.001 and 2.0, and even more preferably between 0.05 and 1.0.
- the temperature at which the acylation reaction is carried out depends on the reactivity of the starting substrate and that of the acylating agent. It is between 20 ° C and 200 ° C, preferably between 40 ° C and 120 ° C.
- reaction is carried out at atmospheric pressure but lower or higher pressures may also be suitable.
- reaction mixture After bringing the reactants into contact, the reaction mixture is brought to the desired temperature.
- the duration of the reaction is a function of many parameters. Most often, it is from 1 hour to 8 hours.
- the aromatic ketone compound which corresponds to formula (III) is preferably obtained (III ′) and even more preferably (IIIa).
- the acylation step is preferably carried out in the presence of a catalyst of the zeolitic type.
- the hydrogenation of the carbonyl group to the carbinol group is carried out.
- a first variant of the process of the invention consists in carrying out a hydrogenation in the presence of conventional hydrogenation catalysts.
- metals from group VIII of the periodic table are used, preferably noble metals, cobalt or nickel.
- a finely divided noble metal from group VIII of the periodic table of elements such as platinum, palladium, rhodium, iridium, ruthenium or osmium.
- Said metal can be provided in a finely divided form or else deposited on a support.
- supports mention may be made of carbon, acetylene black, silica, alumina, zirconia, chromium oxide, bentonite, etc.
- the metal can be deposited on the support in metallic form or else in the form of a compound which will be reduced to metal in the presence of hydrogen.
- the preferred metals are platinum and palladium, preferably deposited on carbon black.
- the platinum and / or palladium is deposited on a support. Generally, it is deposited at a rate of 0.5% to 5% of the weight of the catalyst.
- the amount of hydrogenation catalyst used, expressed by weight of catalyst per weight of keto aromatic compound can vary, for example, between 0.5 and 20%, preferably between 1 and 5%.
- Raney nickel which can contain the conventional impurities found in this type of catalyst, namely chromium and / or iron, without disadvantage.
- the amount of hydrogenation catalyst used expressed by weight of catalyst per weight of ketone aromatic compound can vary, for example, between 1 and 10%, preferably between 3 and 6%.
- the catalyst can be used in the form of a powder, pellets or else granules.
- the amount of hydrogenation catalyst used expressed by weight of catalyst per mole of ketone aromatic compound can vary, for example, between 0.5 and 20%, preferably between 1 and 5%.
- the process of the invention is carried out at a temperature chosen from a temperature range from 50 ° C to 120 ° C and chosen more particularly between 60 ° C and 100 ° C.
- the reaction takes place under hydrogen pressure ranging from a pressure slightly higher than atmospheric pressure to a pressure of several tens of bars.
- the hydrogen pressure varies between 1 and 50 bars, and more preferably between 3 and 10 bars.
- a first variant of the process of the invention consists in carrying out the hydrogenation of the ketone compound, in bulk when the latter and the final product are in liquid form.
- Another variant of the process of the invention consists in carrying out the reaction in an organic solvent.
- An organic solvent is chosen, which is less activated than the starting substrate and which preferably dissolves it.
- An inert solvent can be used under the conditions of the reaction of the invention.
- saturated aliphatic or cycloaliphatic hydrocarbons such as hexane or cyclohexane, or aromatic hydrocarbons such as benzene, toluene, xylenes; alcohols such as methanol, ethanol, propanol, cyclohexanol; esters such as ethyl acetate, butyl acetate; polyol esters or ethers such as tetraethylene glycol diacetate; ethers such as dimethyl ether of ethylene glycol (or glyme), or dimethyl ether of diethylene glycol (or diglyme).
- the preferred solvents are methanol and ethanol.
- concentration of the ketone compound of formula (III) or (III ') or (IIIa), used in the solvent can vary within very wide limits, until saturation under the operating conditions. Generally, it is not economically advantageous to use less than 5% by weight of ketone compound per volume of solvent. Generally, the concentration by weight of ketone compound per volume of solvent is between 20% and 75% and preferably between 40% and 60%.
- the process according to the invention can be implemented by introducing into a inert autoclave the ketone compound of formula (III) or (IID or (IIIa), the catalyst, and the solvent, then, after the usual purges, by supplying the autoclave with an adequate pressure of hydrogen; the contents of the autoclave are then brought under stirring to the appropriate temperature until absorption ceases.
- the pressure in the autoclave can be kept constant during the duration of the reaction thanks to a reserve of gaseous mixture, which feeds it at the selected pressure.
- the autoclave is cooled and degassed.
- the reaction mixture is recovered and the catalyst separated according to conventional solid / liquid separation techniques.
- a benzyl type alcohol is obtained, that is to say a compound comprising at least one aromatic heterocycle or carbocycle in which a hydrogen atom directly linked to the aromatic nucleus is replaced by a
- the reaction medium can be used directly in the following stage, the reaction medium freed from the catalyst and comprising the benzyl alcohol in the etherification stage if the latter is carried out using methanol or ethanol.
- the benzyl alcohol obtained is separated according to conventional separation methods, for example distillation or crystallization, before engaging it in the etherification step.
- benzyl alcohol obtained corresponding to formulas (IV), (IV) or (IVa) is a chiral alcohol
- another variant of the process of the invention consists in carrying out an enantioselective hydrogenation of the ketone compound, in the presence of a complex preferably metallic based on rhodium, iridium, ruthenium or palladium and comprising an optically active diphosphine type ligand.
- the diphosphine can be BINAP or else BIPNOR (bis- (1-phospha-2,3-diphenyl-4,5-dimethylnorbomadiene)).
- the etherification of the hydroxyl group which consists in reacting the benzyl alcohol with another alcohol, in the presence of an effective amount of a zeolite, is carried out in the third step.
- the other alcohol used will be called generically by "alkanol” although it also denotes alcohols comprising in particular aromatic rings.
- benzyl type alcohols preferably used in the process of the invention are:
- alkanol it more particularly corresponds to the general formula (V):
- R 5 - OH (V) in said formula (V): - R5 represents a hydrocarbon group having from 1 to 24 carbon atoms, which can be a saturated or unsaturated, linear or branched acyclic aliphatic group; a saturated, unsaturated or aromatic cycloaliphatic group, a saturated or unsaturated, linear or branched aliphatic group, carrying a cyclic substituent.
- the alkanol which is involved in the process of the invention corresponds to the formula
- R5 represents an alkyl, alkenyl, alkadienyl, alkynyl, linear or branched group preferably having from 1 to 24 carbon atoms.
- the hydrocarbon chain can optionally be:
- Rg represents hydrogen or a linear or branched alkyl group having from 1 to 4 carbon atoms, preferably a methyl or ethyl group,
- acyclic, saturated or unsaturated, linear or branched aliphatic residue may optionally carry a cyclic substituent.
- cycle is meant a carbocyclic or heterocyclic, saturated, unsaturated or aromatic cycle.
- the aliphatic acyclic residue can be linked to the cycle by a valential bond or by one of the following groups:
- cyclic substituents it is possible to envisage cycloaliphatic, aromatic or heterocyclic, in particular cycloaliphatic substituents comprising 6 carbon atoms in the ring or benzenic, these cyclic substituents themselves being optionally carriers of 1, 2, 3, 4 or 5 groups R ", identical or different, R" having the meaning given above for the group R carried by the cycle of formula (I).
- R5 can also represent a carbocyclic group saturated or comprising 1 or 2 unsaturations in the ring, generally having from 3 to 7 carbon atoms, preferably 6 carbon atoms in the ring; said cycle being able to be substituted by 1 to 5 groups R "preferably 1 to 3, R" having the meanings stated previously for R.
- R5 groups As preferred examples of R5 groups, mention may be made of cyclohexyl or cyclohexene-yl groups, optionally substituted by linear or branched alkyl groups, having from 1 to 4 carbon atoms.
- alkanols there may be mentioned:
- - lower aliphatic alkanols having from 1 to 5 carbon atoms such as for example, methanol, ethanol, trifluoroethanol, propanol, isopropyl alcohol, butanol, isobutyl alcohol, dry alcohol - butyl, tert-alcohol butyl, pentanol, isopentyl alcohol, dry pentyl alcohol and tert-pentyl alcohol, ethylene glycol monoethyl ether, methyl lactate, isobutyl lactate, methyl D-lactate, isobutyl D-lactate, propargyl alcohol, 3-chlorobut-2-en-1-ol, 2-butyn-1-ol, - higher aliphatic alcohols having at least 6 and up to about 20 carbon atoms, such as, for example, hexanol, Pheptanol, isoheptyl alcohol, octanol, isooctyl alcohol, 2-ethyl
- cycloaliphatic alcohols having from 3 to approximately 20 carbon atoms, such as, for example, cyclopropanol, cyclobutanol, cyclopentanol, cyclohexanol, cycloheptanol, cyclooctanol, cyclododecanol, tripropylcyclohexanol, methylcyclohexanol cyclopentèn-ol, cyclohexèn-ol,
- An aliphatic alcohol carrying an aromatic group having from 7 to about 20 carbon atoms such as for example benzyl alcohol, phenethyl alcohol, phenylpropyl alcohol, phenyloctadecyl alcohol and naphthyldecyl alcohol.
- polyols in particular polyoxyethylene glycols such as, for example, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, glycerol.
- the aliphatic or cycloaliphatic alcohols are preferably used in the process of the invention, preferably the primary or secondary aliphatic alcohols having 1 to 4 carbon atoms and cyclohexanol.
- a preferred variant of the process of the invention consists in using a terpene alcohol and more particularly a terpene alcohol of formula (Va): T - OH (Va) in said formula (Va):
- - T represents the remainder of a terpene alcohol having a number of carbon atoms multiple of 5.
- pene means oligomers derived from isoprene.
- the alcohol used corresponds to the general formula (Va) in which the residue T represents a hydrocarbon group having from 5 to 40 carbon atoms and more particularly an aliphatic group, saturated or unsaturated, linear or branched; a cycloaliphatic, saturated, unsaturated or aromatic, monocyclic or polycyclic group, comprising rings having from 3 to 8 carbon atoms.
- a cycloaliphatic, poiycyclic terpene alcohol comprising at least two saturated and / or unsaturated carbocycles.
- residue T As regards the remainder T of an aliphatic, saturated or unsaturated, linear or branched terpene alcohol, the number of carbon atoms varies between 5 and 40 carbon atoms. As more specific examples of residue T, mention may be made of groups comprising 8 carbon atoms, saturated or having a double bond, and carrying two methyl groups, preferably in positions 3 and 7.
- the number of carbon atoms in the ring can vary widely from 3 to 8 carbon atoms but it is preferably 5 or 6 carbon atoms and is most often carried by an aliphatic chain.
- the carbocycle can be saturated or comprising 1 or 2 unsaturations in the cycle, preferably from 1 to 2 double bonds which are most often in the ⁇ position of the oxygen atom.
- the aromatic cycle is generally a benzene nucleus.
- the compound can also be polycyclic, preferably bicyclic which means that at least two rings have two carbon atoms in common.
- polycyclic compounds the number of carbon atoms in each cycle varies between 3 and 6: the total number of carbon atoms being preferably equal to 7.
- substituents are one or more alkyl groups, preferably three methyl groups, a methylene group (corresponding to an exocyclic bond), an alkenyl group, preferably an isopropene-yl group.
- alkyl groups preferably three methyl groups, a methylene group (corresponding to an exocyclic bond), an alkenyl group, preferably an isopropene-yl group.
- terpene alcohols which may be used, there may be mentioned:
- the etherification reaction is carried out in the presence of a catalyst consisting of a zeolite.
- the preferred zeolites are the mordenite, ⁇ or Y zeolites in acid form.
- reaction of the benzyl alcohol of formula (IV) with the alkanol of formula (V) can be carried out in the presence or in the absence of an organic solvent, one of the reagents being able to be used as reaction solvent.
- the alkanol is used as the reaction solvent although other organic solvents can be used.
- solvents suitable for the present invention there may be mentioned, without limitation, aliphatic, cycloaliphatic or aromatic ether-oxides and, more particularly, dipropyl ether, diisopropyl ether, dibutyl ether, methyltertiobutylether, ethylene glycol dimethyl ether (or glyme), diethylene glycol dimethyl ether (or diglyme); phenyl oxide; dioxane, tetrahydrofuran (THF).
- dipropyl ether diisopropyl ether
- dibutyl ether methyltertiobutylether
- ethylene glycol dimethyl ether or glyme
- diethylene glycol dimethyl ether or diglyme
- phenyl oxide dioxane, tetrahydrofuran (THF).
- the catalyst can represent, by weight relative to the faulty reagent, from 2 to 50%, preferably from 5 to 20%.
- the process is carried out continuously, for example by reacting a mixture of benzyl alcohol and alkanol on a fixed bed of catalyst, these catalyst / benzyl alcohol ratios have no effect. sense and at a given time, one can have an excess weight of catalyst compared to the starting benzyl alcohol.
- the amount of alkanol of formula (V) expressed in moles of alkanol per mole of benzyl alcohol of formula (IV) can also vary within wide limits.
- the alkanol molar ratio of formula (V) / benzyl alcohol of formula (IV) can vary between 1 and 30.
- the upper limit is not critical, but however for economic reasons, there is no point in exceeding it.
- the temperature of the etherification reaction can vary widely. It is chosen, advantageously between 50 ° C and 200 ° C and even more preferably between 50 ° C and 100 ° C.
- reaction is carried out at atmospheric pressure, but higher pressures may also be suitable, ranging from 1 to 50 bar, preferably from 1 to 25 bar.
- pressures may also be suitable, ranging from 1 to 50 bar, preferably from 1 to 25 bar.
- inert gases such as nitrogen or rare gases, for example argon.
- the duration of the reaction can be very variable. It is most often between 15 minutes and 10 hours, preferably between 30 minutes and 5 hours.
- the process can be carried out batchwise or continuously.
- the catalyst preferably the alkanol, of formula (V), optionally an organic solvent
- the benzyl alcohol preferably of formula (IV)
- a preferred embodiment of the invention consists in gradually introducing the benzyl alcohol, continuously or in fractions, then the reaction mixture is brought to the desired temperature.
- the other variant of the invention consists in carrying out the reaction continuously, in a tubular reactor comprising the solid catalyst placed in a fixed bed.
- the benzyl alcohol and the alkanol are preferably introduced separately. They can also be introduced into a solvent as mentioned above.
- the residence time of the material flow on the catalytic bed varies, for example, between 15 min and 10 hours, and preferably between 30 min and 5 hours.
- a liquid phase is recovered comprising the etherified benzyl alcohol which can be recovered in a conventional manner.
- the process of the invention leads to etherified benzyl alcohols of preferred type I):
- the process of the invention is particularly well suited for the preparation of mixed ethers, that is to say ethers in which the group R5 is different from the group of benzyl type.
- the conversion rate (TT) corresponds to the ratio between the number of substrates transformed and the number of moles of substrate engaged.
- the yield (RR) corresponds to the ratio between the number of moles of product formed and the number of moles of substrate used.
- the temperature is then brought back to 50 ° C. and filtered on sintered glass.
- TT veratrole
- RR acetoveratrole
- EXAMPLE 4 40 g of a zeolitic catalyst in the form of extrudates containing 20% of alumina and 80% of a HY 712 zeolite (Si / Ai ratio of 5.0) are charged to a 100 ml glass reactor. .
- the reaction medium is then heated using a thermostated bath, so as to have a constant temperature of 90 ° C., at the top of the catalytic bed.
- the mixture is stirred for 30 min without heating.
- the internal temperature rises to 30 ° C.
- reaction is continued for 2.5 hours with stirring and heating to 110 ° C.
- the reaction product thus obtained contains, according to the analysis by gas chromatography: 26.1 g of unreacted veratrole and 24.1 g of acetoveratrole, which corresponds to a yield of 83%.
- the acetoveratrole obtained is recovered in a conventional manner, hydrolysis of the reaction medium, separation of the aqueous and organic phases and distillation from the organic phase.
- the reactor is then placed under 10 bar of hydrogen, stirred and heated to 70 ° C.
- the pressure in the reactor is kept constant at 10 bar throughout the reaction.
- the reactor is then purged with 2 x 10 bar of nitrogen.
- the catalyst is filtered.
- the solvent is then distilled.
- the etherification reaction is carried out, using different zeolitic catalysts which are zeolites in acid form.
- zeolites sold by the company PQ are used: a HY CBV 400 zeolite with an Si / Ai ratio of 2.6 (Example 1) and a HY CBV 760 zeolite with an Si / Ai ratio of 25 (example 2).
- H-mordenite type zeolites are used: H-mordenite 20A with Si / Ai ratio of 10 (example 3) and H-mordenite 90 A with Si / Ai ratio of 45 (example 4 ).
- Example 5 an H- ⁇ CBV 811 zeolite sold by the company PQ with an Si / Ai ratio of 12.5 is used.
- the catalyst is filtered.
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Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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EP00900536A EP1140758A1 (fr) | 1999-01-08 | 2000-01-07 | Procede de preparation d'un ether de type benzylique |
IL14417600A IL144176A0 (en) | 1999-01-08 | 2000-01-07 | Method for preparing a benzylic-type ether |
HU0104918A HUP0104918A3 (en) | 1999-01-08 | 2000-01-07 | Method for preparing a benzylic-type ether derivatives |
AU30514/00A AU3051400A (en) | 1999-01-08 | 2000-01-07 | Method for preparing a benzylic-type ether |
JP2000592247A JP2002534403A (ja) | 1999-01-08 | 2000-01-07 | ベンジル型エーテルの調製方法 |
US09/869,743 US6608232B1 (en) | 1999-01-08 | 2000-01-07 | Method for preparing a benzylic-type ether |
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FR99/00171 | 1999-01-08 | ||
FR9900171A FR2788269B1 (fr) | 1999-01-08 | 1999-01-08 | Procede de preparation d'un ether de type benzylique |
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PCT/FR2000/000024 WO2000040535A1 (fr) | 1999-01-08 | 2000-01-07 | Procede de preparation d'un ether de type benzylique |
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US (1) | US6608232B1 (fr) |
EP (1) | EP1140758A1 (fr) |
JP (1) | JP2002534403A (fr) |
CN (1) | CN1341090A (fr) |
AU (1) | AU3051400A (fr) |
FR (1) | FR2788269B1 (fr) |
HU (1) | HUP0104918A3 (fr) |
IL (1) | IL144176A0 (fr) |
WO (1) | WO2000040535A1 (fr) |
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US7166756B2 (en) * | 2003-02-14 | 2007-01-23 | Exxonmobil Research And Engineering Company | Method for hydrocarbon isomerization |
EP1799638B1 (fr) * | 2004-09-29 | 2008-07-30 | Ciba Holding Inc. | Procédé de preparation de cétones aromatiques thiophényl |
MX2010013873A (es) * | 2008-06-27 | 2011-03-25 | Futurefuel Chemical Company Star | Sistemas y metodos para la preparacion de aril alquil eteres. |
GB201104156D0 (en) | 2011-03-11 | 2011-04-27 | Rothamstead Res Ltd | Compositions and methods for controlling pesticide resistant pests |
JP5747348B2 (ja) * | 2011-11-25 | 2015-07-15 | 東レ・ファインケミカル株式会社 | ベンジルエ―テル化合物の製造方法 |
CN103304392A (zh) * | 2012-03-06 | 2013-09-18 | 北京澳林森科技有限公司 | 对异丁基苯乙酮的绿色合成方法 |
US8759597B2 (en) | 2012-04-18 | 2014-06-24 | Uop Llc | Methods for producing zeolite catalysts and methods for producing alkylated aromatic compounds using the zeolite catalysts |
CN103951548B (zh) * | 2014-04-23 | 2015-06-17 | 宿迁科思化学有限公司 | 一种合成大茴香脑的中间体的制备方法 |
CN105622363B (zh) * | 2014-11-04 | 2017-12-08 | 南京工业大学 | 一步法制备香草醇醚的工艺 |
CN108658734A (zh) * | 2017-04-01 | 2018-10-16 | 滕州市天水生物科技有限公司 | 一种生产香兰醇丁醚的工艺 |
EP3818037A1 (fr) * | 2018-07-02 | 2021-05-12 | DSM IP Assets B.V. | Procédé d'acylation sélective de groupes hydroxy primaires en présence de groupes hydroxy secondaires et catalyseur associé |
FR3099478B1 (fr) * | 2019-07-30 | 2021-07-09 | Rhodia Operations | Procédé de traitement d’une composition comprenant de la vanilline naturelle |
CN112058304B (zh) * | 2019-11-20 | 2023-04-25 | 榆林学院 | 一种可调变固体酸性的双功能催化剂、制备方法及其应用 |
CN112811991A (zh) * | 2021-02-01 | 2021-05-18 | 惠泽化学科技(濮阳)有限公司 | 一种对甲氧基苯乙烯的合成方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4434823A1 (de) * | 1994-09-29 | 1996-04-04 | Merck Patent Gmbh | Verfahren zur Herstellung von Hydroxybenzylalkylethern |
WO1997048665A1 (fr) * | 1996-06-20 | 1997-12-24 | Rhodia Chimie | Procede d'acylation d'un compose aromatique |
WO1998022416A1 (fr) * | 1996-11-18 | 1998-05-28 | Agro-Chemie Növényvédöszer Gyártó Értékesitó És Forgalmazó Kft. | Procede de preparation d'ethers de benzyle |
WO1999002475A1 (fr) * | 1997-07-09 | 1999-01-21 | Rhodia Chimie | Procede d'etherification d'un alcool de type benzylique, produits obtenus et ses applications |
WO1999006343A1 (fr) * | 1997-07-31 | 1999-02-11 | Agro-Chemie Növenyvedöszer Gyarto Ertekesitö Es Forgalmazo Kft. | Procede de preparation de 1-(3,4-dimethoxyphenyl)ethanol |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2693190B1 (fr) * | 1992-07-02 | 1994-09-23 | Elf Aquitaine | Procédé d'hydrogénation énantiosélectif de la double liaison C=O OXO. |
JP3789508B2 (ja) * | 1995-03-14 | 2006-06-28 | 高砂香料工業株式会社 | 光学活性非対称ジホスフィン及び該化合物の存在下にて光学活性体を得る方法 |
-
1999
- 1999-01-08 FR FR9900171A patent/FR2788269B1/fr not_active Expired - Fee Related
-
2000
- 2000-01-07 EP EP00900536A patent/EP1140758A1/fr not_active Withdrawn
- 2000-01-07 AU AU30514/00A patent/AU3051400A/en not_active Abandoned
- 2000-01-07 IL IL14417600A patent/IL144176A0/xx unknown
- 2000-01-07 CN CN00804086A patent/CN1341090A/zh active Pending
- 2000-01-07 WO PCT/FR2000/000024 patent/WO2000040535A1/fr not_active Application Discontinuation
- 2000-01-07 JP JP2000592247A patent/JP2002534403A/ja not_active Withdrawn
- 2000-01-07 HU HU0104918A patent/HUP0104918A3/hu unknown
- 2000-01-07 US US09/869,743 patent/US6608232B1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4434823A1 (de) * | 1994-09-29 | 1996-04-04 | Merck Patent Gmbh | Verfahren zur Herstellung von Hydroxybenzylalkylethern |
WO1997048665A1 (fr) * | 1996-06-20 | 1997-12-24 | Rhodia Chimie | Procede d'acylation d'un compose aromatique |
WO1998022416A1 (fr) * | 1996-11-18 | 1998-05-28 | Agro-Chemie Növényvédöszer Gyártó Értékesitó És Forgalmazó Kft. | Procede de preparation d'ethers de benzyle |
WO1999002475A1 (fr) * | 1997-07-09 | 1999-01-21 | Rhodia Chimie | Procede d'etherification d'un alcool de type benzylique, produits obtenus et ses applications |
WO1999006343A1 (fr) * | 1997-07-31 | 1999-02-11 | Agro-Chemie Növenyvedöszer Gyarto Ertekesitö Es Forgalmazo Kft. | Procede de preparation de 1-(3,4-dimethoxyphenyl)ethanol |
Non-Patent Citations (1)
Title |
---|
M. J. CLIMENT: "Hydride transfer reactions of benzylic alcohols catalyzed by acid faujasites", RECUEIL DES TRAVAUX CHIMIQUES DES PAYS-BAS, vol. 110, no. 6, June 1991 (1991-06-01), AMSTERDAM NL, pages 275 - 278, XP002056679 * |
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HUP0104918A2 (hu) | 2002-04-29 |
US6608232B1 (en) | 2003-08-19 |
FR2788269B1 (fr) | 2001-02-09 |
AU3051400A (en) | 2000-07-24 |
IL144176A0 (en) | 2002-05-23 |
FR2788269A1 (fr) | 2000-07-13 |
CN1341090A (zh) | 2002-03-20 |
EP1140758A1 (fr) | 2001-10-10 |
HUP0104918A3 (en) | 2003-08-28 |
JP2002534403A (ja) | 2002-10-15 |
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