WO2011101604A1 - Procede de preparation de composes chimiques d'interet par substitution nucleophile aromatique de derives d'acides carboxyliques aromatiques portant au moins un groupement electroattracteur - Google Patents
Procede de preparation de composes chimiques d'interet par substitution nucleophile aromatique de derives d'acides carboxyliques aromatiques portant au moins un groupement electroattracteur Download PDFInfo
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- WO2011101604A1 WO2011101604A1 PCT/FR2011/050349 FR2011050349W WO2011101604A1 WO 2011101604 A1 WO2011101604 A1 WO 2011101604A1 FR 2011050349 W FR2011050349 W FR 2011050349W WO 2011101604 A1 WO2011101604 A1 WO 2011101604A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B37/00—Reactions without formation or introduction of functional groups containing hetero atoms, involving either the formation of a carbon-to-carbon bond between two carbon atoms not directly linked already or the disconnection of two directly linked carbon atoms
- C07B37/04—Substitution
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B43/00—Formation or introduction of functional groups containing nitrogen
- C07B43/04—Formation or introduction of functional groups containing nitrogen of amino groups
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C227/04—Formation of amino groups in compounds containing carboxyl groups
- C07C227/06—Formation of amino groups in compounds containing carboxyl groups by addition or substitution reactions, without increasing the number of carbon atoms in the carbon skeleton of the acid
- C07C227/08—Formation of amino groups in compounds containing carboxyl groups by addition or substitution reactions, without increasing the number of carbon atoms in the carbon skeleton of the acid by reaction of ammonia or amines with acids containing functional groups
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
- C07C51/353—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by isomerisation; by change of size of the carbon skeleton
Definitions
- the present invention relates to the field of chemical synthesis, and in particular the invention provides a new method for performing an aromatic nucleophilic substitution on aromatic carboxylic acid derivatives carrying at least one electron-withdrawing group other than the leaving group, in the absence of catalyst and no step of protection / deprotection of the acid function of the starting compound.
- Aromatic nucleophilic substitution is a reaction whose interest is well known and widely used in industry. However, it has disadvantages, which are widely known, including the need to use catalysts, and the need to protect / deprotect the carboxyl function (C0 2 H), required as a carbon anchor for chemical functionalisation higher.
- catalysts are restrictive because, at the end of the reaction, they must be trapped and eliminated. They are pollutant residues, and are also likely to leave traces of heavy metals in the reaction products (see for example Konigsberger et al., Organic Process Research & Development 2003, 7, 733-742, or Pink et al. Process Research & Development 2008, 12, 589-595).
- the Applicant reports an aromatic nucleophilic substitution process on an industrial scale and with a high yield, having an optimized number of steps.
- the aromatic nucleophilic substitution reaction is carried out on a carboxylic acid derivative, or a salt thereof, said derivative not being substituted by an electron-withdrawing group other than the leaving group.
- the subject of the invention is a selective process for the preparation of aromatic carboxylic acid derivatives by aromatic nucleophilic substitution, in which:
- an aromatic carboxylic acid derivative bearing a carboxyl function and a single or a salt thereof preferably a lithium, sodium, potassium salt or a zinc salt, preferably a benzoic acid derivative or a its salts,
- said carboxylic acid derivative bearing, in the ortho group of the carboxyl group, a leaving group, which is a fluorine or chlorine atom or a chiral alkoxy group or not, and in the latter case, a methoxy group is preferred; said carboxylic acid derivative being substituted on a position of the ring which is not that occupied by the leaving group, by at least one electron-withdrawing group, preferably with a fluorine atom, with a reagent MNu, in which M is a metal and Nu is a chiral nucleophile or not, it being understood that:
- NuM is not iBuMgCl or NuMgBr with Nu is the ethyl or isobutyl or cyclopentenyl group
- NuM is not an alkylating agent wherein Nu is CI_ 6 alkyl, in the case where the starting material is the acid
- NuM is not MeMgBr, said aromatic nucleophilic substitution reaction being carried out without a catalyst and without a step of protecting / deprotecting the acid function of the starting compound,
- the aromatic carboxylic acid derivative starting product of the reaction is a benzoic acid derivative of general formula (II):
- R2 is a fluorine or chlorine atom or a chiral alkoxy group or not, preferably OCH 3 ,
- R 3 is a hydrogen atom, an alkyl group, an alkoxy group, an aryl, or an amine substituted or unsubstituted by one or two alkyl groups or an electron-withdrawing group, or is R 3 a substituent being capable of reacting in the presence of a base and a metal to form MNu, or R3 can form a ring with R4,
- R4 is a hydrogen atom, an alkyl group, an alkoxy group, an aryl, or an amine substituted or unsubstituted by one or two alkyl groups or an electron-withdrawing group, or is a substituent being able to react in the presence of a base and a metal to form MNu, or R4 can form a ring with R3 or R5,
- R 5 is a hydrogen atom, an alkyl group, an alkoxy group, an aryl, or an amine substituted or unsubstituted by one or two alkyl groups or an electron-withdrawing group, or is a substituent capable of reacting in the presence of a base and a metal to form MNu, or R5 can form a ring with R4 or R6,
- R 6 is a hydrogen atom, an alkyl group, an alkoxy group, an aryl, or an amine substituted or unsubstituted by one or two alkyl groups or an electron-withdrawing group, or is a substituent being capable of reacting in the presence of a base and a metal to form MNu, or R6 can form a ring with R5 with the proviso that at least one of R3, R4, R5 and R6 is an electron-withdrawing group, which is reacted with a compound (III) of formula NuM in which Nu is a nucleophile, and M is a metal, preferably Li, Mg, Zn, Cu or an organomagnesium MgX in which X is a halogen atom or an alkoxy group, preferably OCH 3 , said reaction of aromatic nucleophilic substitution being carried out without a catalyst and without a step of protecting / deprotecting the acid function of the compound (II), to obtain selectively a compound of general formula (I
- NuM is not iBuMgCl or NuMgBr with Nu is ethyl or isobutyl or cyclopentenyl
- NuM is not an alkylating agent wherein Nu is CI_ 6 alkyl
- NuM is not MeMgBr.
- At least one of R4 or R6 is an electron-withdrawing group, the other being as defined above, and in this embodiment
- R 3 and R 4 may together form an aromatic or non-aromatic ring, or a heterocycle, optionally substituted, in particular by a functional group;
- R 4 and R 5 may together form an aromatic or non-aromatic ring, or a heterocycle, optionally substituted, in particular by a functional group
- R5 and R6 when R4 is an electron-withdrawing group, R5 and R6 may together form an aromatic or non-aromatic ring, or a heterocycle, optionally substituted, in particular by a functional group;
- R3 when R3 is a substituent capable of reacting in the presence of a base and a metal to form MNu, substitution of the leaving group R2 by NuM leads to an intramolecular reaction.
- R4, R5 or R6 are a substituent capable of reacting in the presence of a base and a metal to form MNu when one of their adjacent positions is occupied by a substituent capable of behaving as a leaving group, leading to an intramolecular reaction.
- the reaction is carried out at -78 ° C. and the reflux of the solvent.
- the reaction is carried out in an aprotic polar solvent, preferably anhydrous THF (tetrahydrofuran) or diethyl ether, benzene, toluene or a hydrocarbon such as pentane, hexane, heptane or the like. octane.
- the compound NuM is preferably added dropwise at a temperature of between -78 ° C. and the reflux of the solvent.
- the solution is stirred and then hydrolyzed with water.
- the hydrolysis is carried out at low temperature.
- the pH is adjusted to 1 with an aqueous solution of hydrochloric acid (2N) and the solution is extracted with a suitable solvent, for example ethyl acetate.
- a suitable solvent for example ethyl acetate.
- the organic phase is then dried and concentrated under vacuum.
- the crude product is recrystallized or chromatographed.
- At least one equivalent of NuM is used for one equivalent of starting aromatic carboxylic acid derivative.
- one equivalent of NuM per group starting from the starting molecule to be substituted is added.
- At least one equivalent of a metal base preferably butyllithium, sodium hydride, potassium hydride or lithium hydride is used for one equivalent of the starting aromatic carboxylic acid derivative in order to form the corresponding metal salt of the acid function of the derivative.
- aromatic carboxylic acid and at least one equivalent of NuM is added per group leaving the starting molecule to be substituted.
- the reaction is selective because the ketone is formed in a very minor amount ( ⁇ 10%).
- the expected yields for the reaction process according to the invention are between 45 and 100%, preferably 45 to 90%, more preferably 60 to 90%.
- an asymmetric carbon is present on said aromatic carboxylic acid derivative, preferably on said benzoic acid derivative of general formula (II) and / or on the nucleophile, and the compound of general formula ( I) obtained is asymmetrical.
- the aromatic carboxylic acid derivative, preferably said benzoic acid derivative of the general formula (II) carries at least one chiral leaving group.
- reaction medium is supplemented with a chiral ligand; this ligand has the function of providing chirality to the product (I) of the reaction of the invention.
- said chiral ligand may be selected from chiral diamines, chiral diethers, chiral aminoethers, chiral multidentate aminoethers and bisoxazoline ligands. Examples of chiral ligands that can be used are given in Table 1.
- R2 is a fluorine or chlorine atom
- R2 is a fluorine or chlorine atom
- Nu is not a substituted amine or not, in particular Nu is not an aniline derivative.
- R2 is a fluorine or chlorine atom
- Nu is not a substituted amine or not.
- R2 is a fluorine or chlorine atom
- the nucleophile of the compound of general formula NuM is an aniline derivative.
- the NuM compound is obtained according to the synthesis modes described below, it being understood that NuM is not the product of a reaction of the nucleophile and a metal base selected from lithium hydride, sodium hydride, potassium hydride, calcium hydride, lithium diisopropylamide, lithium amide, sodium amide, potassium amide, methoxide sodium, ethoxide of sodium, potassium tert-butoxide, magnesium ethoxide, LiHMDS.
- the NuM compound is obtained by reaction of the nucleophile and butyllithium.
- the compound of general formula (II) is such that:
- R2 and R6 are each independently a fluorine atom
- R3, R4, R5 are each independently a hydrogen atom.
- the compound of general formula (II) is such that:
- R2 and R4 are each independently a fluorine atom
- R3, R5, R6 are each independently a hydrogen atom
- NuM nucleophile
- the monosubstituted product or a mixture of mono- and disubstituted products is obtained.
- the NuM compound can be obtained by direct synthesis (Carey & Sundberg, Advanced Organic Chemistry, Part A Chapter 7, “Carbanions and Other Nucleophilic Carbon Species", pp. 405-448).
- the NuM compound in a second embodiment, can be obtained from lithium salts and anion radicals (Cohen, T., JACS 1980, 102, 1201, JACS 1984, 106, 3245, Acc. 1989, 22, 52).
- the NuM compound can be obtained by metal-halogen exchange (Parham, W. E .; Bradcher, C.K.Acc., Chem Res 1982, 15, 300-305).
- the NuM compound can be obtained by directed metallation (V. Snieckus, Chem Rev, 1990, 90, 879, JOC 1989, 54, 4372).
- the NuM compound is obtained by reaction of the nucleophile and ⁇ -BuLi.
- the NuM compound is obtained by reaction of the nucleophile and a base, in particular a metallic or organometallic base.
- the base is not LiNH2.
- the metal base is not selected from the group consisting of lithium hydride, sodium hydride, potassium hydride, calcium hydride, lithium diisopropylamide, and the like. lithium amide, sodium amide, potassium amide, sodium methoxide, sodium ethoxide, potassium tert-butoxide, magnesium ethoxide, LiHMDS.
- the base is butyllithium, and in this embodiment, advantageously, the compound NuM is obtained by reaction of the nucleophile and n-BuLi.
- the base is chiral, and brings chirality to NuM.
- Nu is a nucleophile selected from those described in Tables 2,3 and 4.
- Alkyl preferably Li, Mg, Cu, Zn, or MgX wherein X CH3 or C 2 H 5 is halogen or alkoxy alkenyl, optionally Li, Mg, Cu, Zn, or MgX where X substituted is halogen or alkoxy
- Alkynyl optionally Li, Mg, Cu, Zn, or MgX where X substituted is halogen or alkoxy
- Aryl optionally Li, Mg, Cu, Zn, or MgX where X substituted is halogen or alkoxy s-Bu Li, Mg, Cu, Zn, or MgX where X
- n-Bu Li is a halogen or alkoxy n-Bu Li, Mg, Cu, Zn, or MgX where X
- M is Li or Mg.
- M is Li, Mg, Cu, Zn, or MgX where X is halogen or alkoxy and N is N (C 1-6 alkyl) 2 , NH (C 1-6 alkyl), NEt 2 , N (CH 2 CH 2 ) 2 NMe, NMeBn, NBn 2 , NMePh, NHt-Bu or NPh 2 .
- the halogen is selected from F, Br, Cl.
- M is MgX with X is alkoxy
- the alkoxy is OCH3 OR OC2H5 .
- M is MgBr or MgOCH3.
- Preferred chiral NuM compounds according to the invention are exemplified in Table 4 below.
- each unsubstituted position of an aromatic ring of one of Tables 2 to 4 may be substituted by a hydrogen atom, an alkyl group, an alkoxy group, an aryl, or an amine substituted or not by one or two Cl-12alkyl groups.
- M is Li or MgBr; preferably Nu is n-BulI, s-BulI, t-BulI, methyl, phenyl, 2-MeC 6 H 4 , 2-MeOC 6 H 4 , 4-MeC 6 H 4 , 4-MeOC 6 H 4 or naphthalene.
- Preferred NuM compounds are ⁇ -BulI, s-BulI, t-BulI, MeLi, PhLi, PhMgBr, 2-MeC 6 H 4 Li, 2-MeOC 6 H 4 Li, 4-MeC 6 H 4 Li, 4-MeOC 6 H 4 Li, LiNaphtalène 1-, 2-LiNaphtalène.
- aryl means a mono- or polycyclic system of 5 to 20, preferably 6 to 12, carbon atoms having one or more aromatic rings (when there are two rings, Reference is made to a biaryl) including phenyl group, biphenyl group, 1-naphthyl group, 2-naphthyl group, tetrahydronaphthyl group, indanyl group, and binaphthyl group.
- aryl also means any aromatic ring comprising at least one heteroatom selected from oxygen, nitrogen or sulfur.
- the aryl group may be substituted with 1 to 3 substituents chosen independently of each other, from a hydroxyl group, a linear or branched alkyl group comprising 1, 2, 3, 4, 5 or 6 carbon atoms, in particular methyl, ethyl, propyl, butyl, an alkoxy group or a halogen atom, especially bromine, chlorine and iodine.
- catalyst refers to any product involved in the reaction to increase the rate of this reaction, but is regenerated or eliminated during or at the end of the reaction.
- protecting the carboxyl function is meant adding on said function a group annihilating the reactivity of the carboxyl function with respect to nucleophiles; this group may be an oxazoline; many chemical groups other than the oxazoline function have been used to protect the function CO 2 H: 2,6-di-tert-butyl-4-methoxyphenyl ester (Hattori, T .; Satoh, T .; Miyano, S. Synthesis 1996, 514. Koshiishi, E. ; Hattori, T .; Ichihara,. ; Miyano, SJ Chem. Soc, Perkin Trans.
- dialkylamides Hoarau, C. Couture, A. Deniau, E. Grandclaudon, P. Synthesis 2000
- 1-imidazolyls Figge, A., Altenbach, HJ, Brauer, Tielmann, P. Tetrahedron: Asymmetry 2002, 13 (2), 137
- 2-oxazolyls Cram, DJ, Bryant, JA, Doxsee, KM Chem Lett, 1987, 19
- 2-thiazolyles etc.
- leaving group is meant a group which takes the two electrons of the sigma bond connecting it with the aromatic carbon atom during the substitution reaction by the nucleophile; according to the invention, the leaving group may be chiral or non-chiral; according to a preferred embodiment of the invention, the leaving group is chiral; according to the invention, the leaving group may be electroattractant or non-electroattractant.
- alkyl any saturated linear or branched hydrocarbon chain of 1 to 12 carbon atoms, preferably 1 to 6 carbon atoms, more preferably methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl , isobutyl, tert-butyl.
- alkoxy is meant any O-alkyl or O-aryl group.
- alkenyl is meant any linear or branched hydrocarbon chain bearing at least one double bond, of 2 to 12 carbon atoms, preferably of 2 to 6 carbon atoms.
- alkynyl is meant any linear or branched hydrocarbon chain bearing at least one triple bond, of 2 to 12 carbon atoms, preferably of 2 to 6 carbon atoms.
- amine means any compound derived from NH 3 ammonia by substitution of one or more hydrogen atoms with an organic radical. According to the invention, a preferred amine is an aniline derivative.
- “functional group” is meant a sub-molecular structure comprising an assembly of atoms imparting a reactivity specific to the molecule which contains it, for example an oxy, carbonyl, carboxy or sulphonyl group, etc.
- nucleophile is meant an acyclic or cyclic compound, the characteristic of which is to comprise at least one atom carrying a free doublet, charged or not.
- nucleophile means an acyclic or cyclic compound, the characteristic of which is to include at least one carrier atom of a charged free doublet, preferably negatively charged.
- nucleophile that can be chiral is meant a nucleophile carrying at least one asymmetric carbon.
- heterocycle is meant a 5- or 6-membered ring containing 1 to 2 heteroatoms selected from O, S, N, optionally substituted by alkyl.
- M u is meant a reagent in which M is a metal and Nu is an independent nucleophile or a substitute of the aromatic ring of the benzoic acid derivative of general formula (II), said substituent being capable of reacting in the presence of a base and a metal to form MNu.
- Nu is a substitute of the aromatic ring of (II)
- the aromatic nucleophilic substitution reaction takes place intramolecularly between the MNu function formed on the substituent and the ortho leaving group of the carboxylic acid function.
- Tetramethylsilane is used as an internal reference when CDCl 3 is used as a solvent.
- acetone-d 6 and DMSO d 6 the chemical shifts are given with respect to the solvent signal.
- the coupling constants are expressed in Hertz (Hz).
- the following abbreviations are used to describe the NMR spectra: s (singlet), d (doublet), dd (doublet split), t (triplet), q (quadruplet), m (multiplet), seven (septuplet).
- the mass spectra were recorded in chemical impact mode or field ionization mode on a high resolution spectrometer (GCT Premier Micromass HighResolution). The accuracy obtained for accurate mass measurements is 4 digits.
- Elemental analyzes were performed by the ICSN's microanalysis center - Gif sur Yvette. The infrared spectra were recorded on a Nicolet® Avatar® 370 DTGS spectrometer. Melting points were measured on a Buchi Melting Point B-540.
- aqueous phase is then acidified to a pH of 1 and extracted with ethyl acetate (3x40 mL). Organic phases combined were dried over MgSO4 and concentrated in vacuo. The residue is purified by silica gel chromatography (cyclohexane: ethyl acetate 95: 5) to give 2-butyl-6-fluorobenzoic acid (425 mg, 2.17 mmol, 43%) as an oil. yellow. Addition of iodomethane prior to hydrolysis does not alter the reaction.
- This compound is prepared from 2,6-difluorobenzoic acid (791 mg, 5 mmol) and s-BuLi (10.7 mL, 15.0 mmol, 1.4 M in cyclohexane solution) according to the procedure of Example 1.
- the reaction mixture is stirred at 0 ° C. for 4 h and then recovered and recrystallized (cyclohexane / ethyl acetate) make it possible to recover 2,6-di-sec-butylbenzoic acid (650 mg, 2.77 mmol, 55%) as a white solid (P f 125- 126 ° C). Addition of iodomethane prior to hydrolysis does not alter the reaction.
- This compound is prepared from 2,6-difluorobenzoic acid (474 mg, 3 mmol) and PhLi (4.55 mL, 6.6 mmol, 1.45 M dissolved in di-n-butyl ether). ) according to the general procedure.
- the reaction mixture is stirred at -30 ° C for 2h.
- the compound is recovered and purified by chromatography column on silica gel (cyclohexane: ethyl acetate 95: 5 to 90:10) to obtain 3-fluorobiphenyl-2-carboxylic acid (185 mg, 0, 856 mmol, 29%) as a yellow solid ( mp 122.5 - 125 ° C).
- the solution is hydrolysed at room temperature with water (25 mL) and the two phases are separated.
- the aqueous phase is washed with ethyl acetate (3 ⁇ 40 mL).
- the aqueous phase is then acidified to a pH of 1 and extracted with ethyl acetate (3x40 mL).
- the combined organic phases are dried over MgSO4 and concentrated in vacuo.
- the residue is purified by silica gel chromatography (cyclohexane: ethyl acetate 95: 5 to 8: 2).
- 3-Fluoro-4-methoxy-biphenyl-2-carboxylic acid (803 mg, 3.26 mmol, 65I) is obtained as a colorless oil.
- Example 5 Preparation of Acid 2,6-bis (diethylamino) benzoic acid
- 2,6-difluorobenzoic acid (474 mg, 3 mmol) is added dropwise.
- solution in anhydrous THF (10 mL) The solution is stirred at -30 ° C for 1 h and then 3 h at 0 ° C.
- the reaction medium is hydrolysed at room temperature with distilled water (20 ml) and the two phases are separated.
- the aqueous phase (AQ-1) is extracted with ethyl acetate (3 * 20 mL) and the combined organic phases (ORGA1) were dried over MgS0 4.
- the ORGA1 phase corresponds mainly to carboxylate derived from 2,6-bis (diethylamino) benzoic acid.
- 10 ml of an aqueous solution of 1N NaOH are added and the reaction medium is evaporated under reduced pressure.
- the combined organic phases (ORGA2) were dried over MgS0 4.
- the ORGA2 phase corresponds to pure 2,6-bis (diethylamino) benzoic acid (240 mg, 0.92 mmol). (Overall yield: 420 mg, 53%).
- ORGA2 The combined organic phases (ORGA2) were dried over MgS0 4.
- the ORGA2 phase corresponds to pure 2- (IV-methyl-IV-phenyl) -6-fluorobenzoic acid (190 mg, 0.92 mmol).
- ORGA3 The organic phase thus obtained (ORGA3) was dried over MgS0 4. It corresponds to protonated 2-fluoro-6- (IV-methyl-IV-phenyl) benzoic acid.
- 10 ml of an aqueous solution of 1N NaOH are added and the reaction medium is evaporated under reduced pressure.
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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CA2789373A CA2789373A1 (fr) | 2010-02-19 | 2011-02-18 | Processus de preparation de composes chimiques d'interet par substitution nucleophile aromatique de derives d'acides carboxyliques aromatiques soutenant au moins un groupe attirant les electrons |
CN2011800197527A CN102985399A (zh) | 2010-02-19 | 2011-02-18 | 通过对携带至少一个吸电子基团的芳香族羧酸衍生物进行亲核芳香族取代来制备目的化合物的方法 |
JP2012553380A JP2013519715A (ja) | 2010-02-19 | 2011-02-18 | 少なくとも1つの電子求引性基を有する芳香族カルボン酸誘導体の芳香族求核置換による目的の化学化合物の調製方法 |
US13/578,973 US20120330056A1 (en) | 2010-02-19 | 2011-02-18 | Process for preparing chemical compounds of interest by nucleophilic aromatic substitution of aromatic carboxylic acid derivatives supporting at least one electro-attractive group |
EP11712606A EP2536682A1 (fr) | 2010-02-19 | 2011-02-18 | Procede de preparation de composes chimiques d'interet par substitution nucleophile aromatique de derives d'acides carboxyliques aromatiques portant au moins un groupement electroattracteur |
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FR1051226A FR2956662A1 (fr) | 2010-02-19 | 2010-02-19 | Procede de preparation de composes chimiques d'interet par substitution nucleophile aromatique de derives d'acides carboxyliques aromatiques |
FR1051226 | 2010-02-19 | ||
FR1054645A FR2961204A1 (fr) | 2010-06-11 | 2010-06-11 | Procede de substitution nucleophile aromatique a partir d'acides difluorobenzoiques |
FR1054645 | 2010-06-11 | ||
FR2010052674 | 2010-12-10 | ||
FRPCT/FR2010/052674 | 2010-12-10 |
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EP (1) | EP2536682A1 (fr) |
JP (1) | JP2013519715A (fr) |
CN (1) | CN102985399A (fr) |
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US6362365B1 (en) * | 1998-11-04 | 2002-03-26 | Clariant Gmbh | Preparation of trifluorobenzoic acids |
US20040039208A1 (en) * | 2001-07-20 | 2004-02-26 | Chen Michael Huai Gu | Process for making n-aryl-anthranilic acids and their derivatives |
US20090030218A1 (en) * | 2005-05-19 | 2009-01-29 | Kissei Pharmaceutical Co., Ltd. | Method For Producing Aminoalcohol Derivative Having Biphenyl Group |
US20090233955A1 (en) * | 2004-12-08 | 2009-09-17 | Frazee James S | 1H-Pyrrolo[2,3-B]Pyridnes |
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DE3914227A1 (de) * | 1989-04-29 | 1991-01-10 | Hoechst Ag | Verfahren zur herstellung von 2,7-difluor-9-fluorenon und neue zwischenprodukte |
US6333431B1 (en) * | 1998-09-14 | 2001-12-25 | Otsuka Pharmaceutical Co., Ltd. | Processes for the preparation of fluorinated benzoic acids |
HUP0200932A3 (en) * | 1999-04-21 | 2002-11-28 | Warner Lambert Co | Method for making 2-(n-phenylamino)benzoic acids |
BR0113520A (pt) * | 2000-08-25 | 2003-06-24 | Warner Lambert Co | Processo de preparação de ácidos n-aril-antranìlicos e seus derivados |
JP2003002863A (ja) * | 2001-06-25 | 2003-01-08 | Nippon Soda Co Ltd | 安息香酸類の製造方法および新規化合物 |
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- 2011-02-18 EP EP11712606A patent/EP2536682A1/fr not_active Withdrawn
- 2011-02-18 CA CA2789373A patent/CA2789373A1/fr not_active Abandoned
- 2011-02-18 WO PCT/FR2011/050349 patent/WO2011101604A1/fr active Application Filing
- 2011-02-18 CN CN2011800197527A patent/CN102985399A/zh active Pending
- 2011-02-18 US US13/578,973 patent/US20120330056A1/en not_active Abandoned
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EP2536682A1 (fr) | 2012-12-26 |
CN102985399A (zh) | 2013-03-20 |
CA2789373A1 (fr) | 2011-08-25 |
US20120330056A1 (en) | 2012-12-27 |
JP2013519715A (ja) | 2013-05-30 |
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