WO2012127174A1 - Procede de synthese de derives de cetobenzofurane - Google Patents
Procede de synthese de derives de cetobenzofurane Download PDFInfo
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- WO2012127174A1 WO2012127174A1 PCT/FR2012/050607 FR2012050607W WO2012127174A1 WO 2012127174 A1 WO2012127174 A1 WO 2012127174A1 FR 2012050607 W FR2012050607 W FR 2012050607W WO 2012127174 A1 WO2012127174 A1 WO 2012127174A1
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- 0 CCCCC(C(C(OCC)=O)c(cc(cc1)NS(C)(=*)=O)c1O)=O Chemical compound CCCCC(C(C(OCC)=O)c(cc(cc1)NS(C)(=*)=O)c1O)=O 0.000 description 1
- YJASRJZSSUOGKB-UHFFFAOYSA-N CS(Nc(cc1)ccc1O)(=O)=O Chemical compound CS(Nc(cc1)ccc1O)(=O)=O YJASRJZSSUOGKB-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D307/78—Benzo [b] furans; Hydrogenated benzo [b] furans
- C07D307/79—Benzo [b] furans; Hydrogenated benzo [b] furans with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the hetero ring
- C07D307/80—Radicals substituted by oxygen atoms
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/06—Antiarrhythmics
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
- C07C303/36—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of amides of sulfonic acids
- C07C303/40—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of amides of sulfonic acids by reactions not involving the formation of sulfonamide groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C311/00—Amides of sulfonic acids, i.e. compounds having singly-bound oxygen atoms of sulfo groups replaced by nitrogen atoms, not being part of nitro or nitroso groups
- C07C311/01—Sulfonamides having sulfur atoms of sulfonamide groups bound to acyclic carbon atoms
- C07C311/02—Sulfonamides having sulfur atoms of sulfonamide groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
- C07C311/08—Sulfonamides having sulfur atoms of sulfonamide groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton having the nitrogen atom of at least one of the sulfonamide groups bound to a carbon atom of a six-membered aromatic ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C311/00—Amides of sulfonic acids, i.e. compounds having singly-bound oxygen atoms of sulfo groups replaced by nitrogen atoms, not being part of nitro or nitroso groups
- C07C311/15—Sulfonamides having sulfur atoms of sulfonamide groups bound to carbon atoms of six-membered aromatic rings
- C07C311/21—Sulfonamides having sulfur atoms of sulfonamide groups bound to carbon atoms of six-membered aromatic rings having the nitrogen atom of at least one of the sulfonamide groups bound to a carbon atom of a six-membered aromatic ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D307/78—Benzo [b] furans; Hydrogenated benzo [b] furans
- C07D307/82—Benzo [b] furans; Hydrogenated benzo [b] furans with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to carbon atoms of the hetero ring
- C07D307/83—Oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D307/78—Benzo [b] furans; Hydrogenated benzo [b] furans
- C07D307/82—Benzo [b] furans; Hydrogenated benzo [b] furans with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to carbon atoms of the hetero ring
- C07D307/84—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen
Definitions
- the present invention relates to cetobenzofuran derivatives of general formula (I) shown below as well as to their synthesis process via the coupling between a quinoneimine and a synthetic cisters.
- G1 represents a linear or branched (i) alkyl group, (ii) haloalkyl, (iii) cycloalkyl, (iv) aryl, substituted or unsubstituted, (v) alkene or (vi) alkyne,
- G3 represents (i) a group -NHS0 2 Rc or (ii) a group -NHRc, where Rc represents (a) a linear or branched alkyl group, (b) a cycloalkyl group or (c) an aryl group, substituted or unsubstituted,
- G5 represents a halogen atom or a group -ORb where Rb represents a hydrogen atom, an alkyl, haloalkyl, aryl, arylalkyl, heteroaryl, cycloalkyl, heterocycloalkyl group or a -alkyleneaminoalkyl group,
- Ra is chosen from hydrogen atom, halogen atoms, alkyl, haloalkyl, alkoxy and alkoxyalkyl groups,
- na is an index equal to 0, 1, 2, 3 or 4.
- cetobenzofurans (I) is 2-n-butyl-3- [4- (3-di-n-butylaminopropoxy) benzoyl] -5-methylsulfonamido-benzofuran known as dronedarone.
- (D) may be in free base or salt form, in particular 2-n-butyl-3- [4- (3-di-n-butylaminopropoxy) benzoyl] -5-methylsulfonamidobenzofuran hydrochloride salt.
- Dronedarone is particularly useful as an active ingredient in indications of cardiac arrhythmia.
- the free base form of dronedarone is synthesized according to the process described in EP0471609B1 via the key benzofuran ring intermediate, 2-butyl-5-nitro-benzofuran.
- the 2-butyl-5-nitro-benzofuran intermediate must be functionalized in position 3 and must be converted to position 5, according to scheme 1 below.
- the nitro group borne in position 5 of 2-butyl-5-nitro-benzofuran must be converted to methanesulfonamide by a reduction of -N0 2 in -NH 2 followed by sulfonylation.
- the Applicant therefore seeks new synthetic routes involving benzofurans, preferably already functionalized in the 2, 3 and 5 positions of the benzofuran ring and advantageously already suitably functionalised in the 2 and 5 positions, in order to carry out the synthesis of molecules. of formula (I) above, thus making it possible to circumvent the technical difficulties while at the same time best meeting the constraints of cost, toxicity, safety and respect for the environment related to the industrialization of such a synthetic process.
- the Applicant has now found a new process for the synthesis of cetobenzofuran derivatives of formula (I), in particular a novel process for the synthesis of Dronedarone of formula (D) above, comprising a Friedel and Crafts acylation step or a Fries rearrangement reaction from a common intermediate.
- This method has the advantage of being able to synthesize the final molecule (I) from a common intermediate according to two possible paths which are subsequently called the A and B routes, allowing a certain flexibility at the industrial level.
- the invention relates to a process for the synthesis of a cetobenzofuran derivative, in the form of (i) acid, (ii) base, (iii) an acid or a base addition salt, (iv) hydrate or (v) solvate, advantageously dronedarone or its hydrochloride salt, said cetane derivative (I) below:
- G1 represents a linear or branched (i) alkyl group, advantageously a C 1 -C 8 alkyl group, even more advantageously an alkyl group; C1-C4 such as, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl or tert-butyl, (ii) haloalkyl, (Ni) cycloalkyl, (iv) aryl, substituted or unsubstituted (v) alkene or (vi) alkyne, preferably G1 is alkyl and even more preferably G1 is n-butyl;
- G3 represents (i) a group -NHS0 2 c or (ii) a group -NHRc wherein
- Rc represents (a) a linear or branched alkyl group, advantageously a C1-C8 alkyl group, still more advantageously a C1-C4 alkyl group, such as, for example, a methyl, ethyl, n-propyl or isopropyl group; -butyl, sec-butyl or tert-butyl, (b) a cycloalkyl group or (c) a substituted or unsubstituted aryl group, advantageously G3 represents a -NHSO 2 alkyl group or a -NHSO 2 aryl group, still more advantageously G3 represents a grouping -
- G5 represents a halogen atom or a group -ORb where Rb represents a hydrogen atom, an alkyl, haloalkyl, aryl, arylalkyl, heteroaryl, cycloalkyl or heterocycloalkyl group or an alkyleneaminoalkyl group, advantageously G5 represents a group -ORb with Rb selected from -alkyleneaminoalkyl groups, preferably Rb represents a 3- (di-n-butylamino) -propyl group;
- Ra represents a substituent chosen from hydrogen, halogen atoms, alkyl, haloalkyl, alkoxy and alkoxyalkyl groups, advantageously Ra represents a substituent chosen from the hydrogen atom, the halogen atoms and the halogen atoms; alkyl groups,
- na is an index equal to 0, 1, 2, 3 or 4,
- halogen atoms the -OH group, alkoxy groups, aryloxy and -NRdRe with Rd and Re are identical or different and are selected independently from each other, from a hydrogen atom, groupings alkyl and aryl groups, said aryl and alkyl groups being optionally substituted, advantageously G 2 is chosen from halogen atoms, even more advantageously G 2 is chosen from chlorine and bromine,
- the compounds of formula (I) may comprise one or more asymmetric carbon atoms. They can therefore exist as enantiomers or diastereoisomers. These enantiomers, diastereoisomers, as well as their mixtures, including the racemic mixtures, form part of the invention.
- the compounds of formula (I) may exist in the form of bases or of pharmaceutically acceptable salts for addition to organic or inorganic acids. Such addition salts are part of the invention. These salts can be prepared with pharmaceutically acceptable acids, but the salts of other acids that are useful, for example, for the purification or the isolation of the compounds of formula (I) are also part of the invention.
- the invention also relates to synthetic intermediates such as the compounds of formula (II), (VIII) and (IX), in base form, or of pharmaceutically acceptable acid addition salts.
- synthetic intermediates such as the compounds of formula (II), (VIII) and (IX), in base form, or of pharmaceutically acceptable acid addition salts.
- organic or inorganic for example the salts defined above for the formula (I), said compounds (II), (VIII) and (IX) being of following formula:
- G1 and G3 are as defined for the ketobenzofuran of formula (I) above and in which the group G2 is chosen,
- halogen atoms the -OH group, alkoxy groups, aryloxy and -NRdRe with Rd and Re are identical or different and are selected independently from each other, from a hydrogen atom, the alkyl groups and the aryl groups, said aryl and alkyl groups being optionally substituted, advantageously G 2 is chosen from halogen atoms, even more advantageously G 2 is chosen from chlorine and bromine,
- phenyl is optionally substituted in the ortho and / or meta position, but never in the para position, by said radical Ra, with Ra and n as defined above for the ketobenzofuran (I).
- a halogen atom a fluorine, chlorine, bromine or iodine atom
- an alkyl group a saturated, linear or branched, saturated aliphatic group which may comprise 1, 2, 3, 4 or 5 carbon atoms (abbreviated to - (C1-C5) alkyl).
- a saturated, linear or branched, saturated aliphatic group which may comprise 1, 2, 3, 4 or 5 carbon atoms (abbreviated to - (C1-C5) alkyl).
- the group -Clalkyl the methyl group, such as (ii) -C 2 alkyl group, the ethyl group, such as (iii) -C 3 alkyl group, the n-propyl group and the isopropyl group.
- (iv) -C4alkyl group the n-butyl group, the group isobutyl and tertbutyl group, such as (v) -C 5 alkyl group, n-pentyl group and isopentyl group;
- a haloalkenyl group an alkyl group as defined above substituted with 1, 2, 3, 4 or 5 halogen atoms, as defined previously. Mention may be made, for example, of the -halogeno (C1 -C5) alkyl groups, with (C1-C5) alkyl as defined above, for example the trifluoromethyl group (abbreviated -CF 3 ) and the -CH 2 -CF 3 group. ;
- an alkylene group an alkyl group as defined above, divalent saturated, linear or branched, which may comprise 1, 2, 3, 4 or 5 carbon atoms (abbreviated
- an alkoxy group an -O-alkyl radical where the alkyl group is as previously defined.
- group -O-C1alkyl the groups -O- (C1-C5) alkyl or - (C1-C5) alkoxy, and in particular such as (i) group -O-C1alkyl, the group -Omethyl, such as (ii ) -O-C2alkyl group, -Oethyl group, such as (iii) -O-C3alkyl group, -Opropyl group and -Oisopropyl group, such as (iv) -O-C4alkyl group, -Obutyl group, - Oisobutyl and the group -Outbutyl, such as (v) -O-C5alkyl group, - Opentyl group, -Oisopentyl group and -Oneopentyl group;
- an aryloxy group an -O-aryl radical in which the aryl group is as defined below;
- an aryl group a cyclic aromatic group comprising 6, 7, 8, 9 or 10 carbon atoms.
- aryl groups mention may be made of the phenyl group (abbreviated to Ph), the naphthyl group and a -C 6 H 4 -alkyl group (with the alkyl radical, as defined above, in the ortho, meta or para of the aromatic nucleus). Mention may be made, as -C 6 H 4 -alkyl group, of the -C 6 H 4 -CH 3 groups with CH 3 in the ortho, meta or para position;
- an arylalkyl group an aryl group, as defined above, substituted with at least one alkyl group, as defined above.
- alkyl-aryl radicals There may be mentioned, for example, benzyl that is to say the radical -CH 2 -Ph;
- an alkoxy-alkyl group a radical of formula -alkylene-O-alkyl, in which the alkyl and alkylene groups, comprising the same number of carbon or not comprising the same number of carbon, are as defined previously.
- a radical of formula -alkylene-O-alkyl in which the alkyl and alkylene groups, comprising the same number of carbon or not comprising the same number of carbon, are as defined previously.
- an alkoxy-aryl group a radical of formula -alkylene-O-aryl, in which the aryl and alkylene groups, comprising the same number of carbon or not comprising the same number of carbon, are as defined previously.
- a heteroaryl group a cyclic aromatic group comprising 2, 3, 4 or 5 carbon atoms and comprising 1, 2 or 3 heteroatoms, which may be chosen from the nitrogen atom, oxygen atom and the sulfur atom, independently of one another, so as to be identical or different, when they are 2 or independently of each other, so as to be identical or different when they are 3 in number.
- pyridyl, furanyl and pyrrolyl groups There may be mentioned
- a cycloalkyl group a cyclic alkyl group which can have 3, 4, 5 or 6 carbon atoms, also abbreviated to (C 3 -C 6) cycloalkyl.
- C 3 -C 6 cycloalkyl group
- a heterocycloalkyl a cyclic alkyl group, optionally bridged, comprising 5, 6 or 7 carbon atoms and comprising 1, 2 or 3 heteroatoms which can be chosen, independently of one another, from to be identical or different, when they are 2 or independently of each other, so as to be identical or different, when there are 3, among the nitrogen atom, the atom of oxygen and the sulfur atom. Mention may especially be made of piperidinyl, piperazinyl, pyrrolidinyl, hexamethyleneimino, morpholinyl, 1,1-dioxydotetrahydrothienyl;
- an alkyleneaminoalkyl group a group of formula -alkylene-N (alkyl) 2 in which the alkylene and alkyl groups, comprising the same number of carbon or not comprising the same number of carbon, are as defined previously.
- the two alkyl groups may comprise a different number of carbon with respect to each other.
- an alkene group a group of formula -C n H 2n where n is a natural number greater than or equal to 2, which may be linear or branched and which is characterized by the presence of at least one covalent double bond between two of its carbon atoms include the ethylenic group, but-1,3-diene group;
- an alkane group a group of formula C n H 2n -2 0 ⁇ n is a natural number greater than or equal to 2, which may be linear or branched and which is characterized by the presence of at least one covalent triple bond between two of its carbon atoms.
- an acetylenic group a but-1-yne group or an acetylenic dimethyl group.
- - leaving group in the following, a group that can be easily cleaved from a molecule by breaking a heterolytic bond, with departure of an electronic pair. This group can thus be easily replaced by another group during a reaction of substitution, for example.
- Such leaving groups are, for example, halogens or an activated hydroxy group such as mesyl, tosyl, triflate, acetyl, etc. Examples of leaving groups as well as references for their preparation are given in Advances in Organic Chemistry, J. March, 3 rd Edition, Wiley Interscience, p. 310-316.
- the subject of the invention is, in particular, a process for synthesizing a compound of formula (I) for which G3 is -NH-SO2-Rc, G5 is ORb, this compound is called a ketosulfonamido derivative.
- G 1 represents a linear or branched (i) alkyl group, advantageously a C 1 -C 8 alkyl group, even more advantageously a C 1 -C 4 alkyl group such as, for example, a methyl, ethyl, n-propyl or isopropyl group, n butyl, sec-butyl or tert-butyl, (ii) haloalkyl, (iii) cycloalkyl, (iv) aryl, substituted or unsubstituted, (v) alkene or (vi) alkyne, advantageously G1 represents an alkyl group and even more advantageously G1 represents a methyl or n-butyl group;
- Ra represents a substituent chosen from hydrogen, halogen atoms, alkyl, haloalkyl, alkoxy and alkoxyalkyl groups, advantageously Ra represents a substituent chosen from the hydrogen atom, the halogen atoms and the halogen atoms; alkyl groups, even more advantageously Ra represents a hydrogen atom,
- n 0, 1, 2, 3 or 4, preferably n is 0, 1 or 4, and / or
- Rb represents a hydrogen atom, an alkyl, haloalkyl, aryl, arylalkyl, heteroaryl, cycloalkyl, heterocycloalkyl group or a -alkyleneaminoalkyl group, advantageously Rb is chosen from -alkyleneaminoalkyl groups, still more advantageously Rb represents a 3- (di) group; - n-butylamino) -propyl;
- Rc represents (a) a linear or branched alkyl group, advantageously a C1-C8 alkyl group, still more advantageously a C1-C4 alkyl group, such as, for example, a methyl, ethyl, n-propyl or isopropyl group; butyl, sec-butyl or tert-butyl, (b) a cycloalkyl group or (c) a substituted or unsubstituted aryl group, advantageously Rc represents an alkyl group or an aryl group, still more advantageously Rc represents a group -CH 3 ;
- G1 and Rc are as defined above and the group G2 is chosen
- halogen atoms the -OH group, alkoxy groups, aryloxy and -NRdRe with Rd and Re are identical or different and are selected independently from each other, from a hydrogen atom, the alkyl groups and the aryl groups, said aryl and alkyl groups being optionally substituted, advantageously G 2 is chosen from halogen atoms, even more advantageously G 2 is chosen from chlorine and bromine,
- the group G2 in the intermediate of formula (II) or (III) is chosen from -OH, -O-optionally substituted phenyl, chlorine and bromine.
- said ketosulfonamido-benzofuran derivative of formula (14) has a radical Ra which is a hydrogen atom, a n a which is equal to 4, a radical R c which is a methyl or phenyl group, a radical G 1 which is an n-butyl group and / or a radical Rb which is a group - (CH2) 3N [(CH 2 ) 3Cl-13] 2 or a group - (CH 2 ) 3 N + H [(CH 2 ) 3 CH 3 ] 2, Cr.
- said ketosulfonamido-benzofuran derivative of formula (14) is the dronedarone of formula (D) in free base or salt form, advantageously in the form of hydrochloride salt.
- Oxidizing agents of this oxidation reaction according to the invention may be mentioned:
- chromate reagents such as the collin reagent, Jones reagent; Ag 2 0, peroxides such as dicumyl peroxides, hydrogénoperoxide of cumyl; DMSO, DDQ (Dichlorodicyanoquinone), peracids such as chloroperbenzoic acid, other perbenzoic acids; hypervalent iodine reagent (Ph-I (OAc) 2, ...), hydrogen peroxide, oxygen (air), bleach, supported oxidants, electrolytic processes in, for example, solvents such as glacial acetic acid, ethyl acetate, acetone, acetonitrile, pyridine, chlorinated solvents such as chlorobenzene, dichloromethane, aromatic solvents such as benzene, linear or cyclic alkanes, water, DMSO, DMAP, carboxylic acids such as acetic acid.
- solvents such as glacial acetic acid, ethyl acetate
- a hot-conducted oxidation reaction with from 1 to 4 equivalents, for example about 1 to 4 equivalents of activated MnO 2 (relative to the initiated aminophenol) in benzene, or
- iodylbenzene C 6 H 5 IO 2
- a Lewis acid for example: vanadyl acetylacetonate
- Potassium or sodium dichromates are cheaper than lead tetracetate and less toxic.
- the oxidation reaction of the phenolic derivative (V) to p-quinone derivative (VI) is carried out with K 2 Cr 2 O 7 or MnO 2 as oxidizing agent in acetic acid.
- a coupling reaction of said Quinonimine derivative (VI) with a dicarbonyl derivative (VII) is carried out in the presence of a base, for example a strong base such as, for example, an alcoholate.
- a base for example a strong base such as, for example, an alcoholate.
- This reaction may take place for example in an aprotic solvent such as DMF or dioxane at room temperature.
- the dicarbonyl derivative (VIII) is then engaged in a cyclization reaction to give a benzodihydrofuran derivative (IX) which by dehydration will then lead to the aromatic derivative benzofuran (II).
- This reaction can take place for example in an aprotic solvent such as DMF or dioxane. Cyclization / dehydration may have leap in strong acid medium, for example using hot hydrochloric acid for 3 hours.
- cetobenzofuran derivative (I) is subsequently obtained from said aromatic intermediate benzofuran derivative (II) via either a friedel acylation pathway A and Crafts or via either a Fries rearrangement pathway B.
- the first part of the synthesis according to the invention consists of the synthesis of an intermediate (7).
- Said intermediate is the sulphonamido-benzofuran ester of formula (7) below:
- Rc and G1 are as defined above and R1 represents a hydrogen atom, an alkyl or an aryl, advantageously it is a methyl, an ethyl or a phenyl.
- This intermediate (7) can therefore be obtained at the end of the following successive steps, represented in diagram 3:
- the groups G1 and / or Rc of the compounds (2), (3), (4), (5), (6) and (7) of scheme 3 below are as defined for the ketobenzofuran of formula (I) according to the invention and R 1 is as defined for the compound (7) above.
- the sulfonylation reaction of p-aminophenol (1) to p-sulfonamidophenol (2) can be carried out using RcS (O) 2 CI, with Rc as defined above, in the presence of a base. J.Am.Chem.Soc, 1951, 73, 1 145-1 149 of R.Adams and JHLooker describes operating conditions for such sulfonylation and oxidation.
- Rc -CH 3
- Rc -C 6 H 5
- Rc -benzenesulphonamidophenol obtained from p-aminophenol (1) sulfonylated by benzenesulfonyl chloride in the presence of base.
- the solvent of the reaction may be chosen for example from methanol, ethanol, pyridine, dimethylformamide (abbreviated DMF), dichloromethane, chloroform, chlorobenzene, dichloroethane, benzene, toluene, ethyl acetate acetonitrile, acetone, tetrahydrofuran (abbreviated THF), dioxane, N-methylpyrrolidinone, advantageously it is chosen from pyridine, methanol, DMF and / V-methyl-pyrrolidinone.
- DMF dimethylformamide
- THF tetrahydrofuran
- the base may be chosen for example from pyridine, triethylamine, hydrogenocarbonates, potassium carbonate, sodium carbonate, sodium hydroxide, ammonia, advantageously potassium or sodium carbonate.
- the reaction is preferably conducted at a temperature below room temperature.
- RcS (O) 2 CI is methanesulfonyl chloride or benzenesulfonyl chloride.
- This sulfonylation reaction can advantageously be carried out with 1 equivalent of methanesulfonyl chloride cast between 10 ° C. and 15 ° C. on 2 equivalents of p-aminophenol suspended in a little more than 11 volumes of methanol (volume in ml / weight). in g of p-aminophenol).
- the second equivalent of p-aminophenol serves to capture the acid formed, the amino function acting as a base.
- This oxidation reaction can be conducted, for example, using:
- sodium or potassium dichromate (or K 2 Cr 2 O 7 ), advantageously using sodium dichromate monohydrate in sulfuric acid or acetic acid,
- iodyl-benzene C 6 H 5 I0 2 iodosylbenzene or (C 6 H 5 IO), preferably iodyl-benzene (C 6 H 5 I0 2) in the presence of a Lewis acid , such as for example vanadyl acetylacetonate, in benzene or toluene.
- a Lewis acid such as for example vanadyl acetylacetonate
- sodium or potassium dichromate advantageously K 2 Cr 2 O 7 in acetic acid, or activated manganese dioxide are used.
- the p-quinone monoimide (3) then undergoes a coupling reaction with:
- Suitable solvent for this coupling reaction is dioxane or acetone.
- Suitable alkoxides include, for example, sodium methanolate, lithium methanolate, sodium ethanolate and lithium ethanolate.
- the substituted aminophenol resulting from the preceding coupling, of formula (5) is then cyclized in an acidic medium, advantageously in the presence of hydrochloric acid, phosphoric acid, sulfuric acid, methanesulphonic acid, trifluoroacetic acid, acetic anhydride, leading after dehydration and aromatization to the sulfonamido-benzofuran ester (7).
- the second part of the synthesis can be done from the intermediate sulphonamido-benzofuran ester (7) via two possible routes: the channel A comprising a Friedel acylation step and Crafts or the B-channel comprising a rearrangement step Fries, shown in Figure 4 below both leading to the formation of cetobenzofuran (14) according to the invention.
- the synthesis process according to the invention is characterized in that the sulphonamido-benzofuran ester of formula (7) is engaged in a so-called Friedel-Crafts route as shown above in the diagram. 4 comprising successively a step:
- an acyl sulphonamido-benzofuran halide of formula (9) advantageously the acyl sulphonamido-benzofuran bromide of formula (9 ') or the sulphonamido-benzofuran acyl chloride of formula (9 ") from said sulphonamido-benzofuran acid (8);
- the sulphonamido-benzofuran ester intermediate (7) bearing in the 3-position an ester function is saponified with, for example, 10% by weight sodium hydroxide, giving the sulphonamido-benzofuran acid of formula ( 8) or its sodium salt shown in Scheme 4.
- This sulfonamido-benzofuran acid of formula (8) is then activated so as to be engageable with the ether aromatic intermediate (13) in a Friedel and Crafts acylation reaction. .
- This activation consists in converting the sulphonamido-benzofuran acid of formula (8) to the acyl sulphonamido-benzofuran halide of formula (9), advantageously the acyl sulphonamido-benzofuran bromide of formula (9 ') and the chloride of sulfonamido-benzofuran acyl of formula (9 ").
- the sulphonamido-benzofuran acid of formula (8) is converted into acyl sulphonamido-benzofuran chloride of formula (9 ") by reaction with thionyl chloride or oxalyl chloride.
- phenol (Rb H) (13), N, N-diethyl-N- (2-phenoxyethyl) amine in free base form, in the form of hydrochloride or any other salt thereof.
- the ether aromatic (13) can be obtained by reacting (i) the phenol with (ii) a compound RbX in which Rb is as defined above and X is a leaving group, advantageously a halogen, more preferably a chloride or a bromide, (iii) in the presence of a base, such as, for example, sodium hydroxide and then by transforming the etheraromatic salt (13) obtained in salt, advantageously into the hydrochloride salt.
- RbX is a tertiary amine halide, still more preferably RbX is CI- (CH 2 ) 3N [(CH 2) 3 CH 3 ] 2 or Br- (CH 2 ) 3 N [(CH 2) 3 CH 3 ] 2.
- the phenol coupling takes place with ⁇ - (3-chloropropyl) - ⁇ , ⁇ -dibutylamine yielding ⁇ , ⁇ -dibutyl- / ⁇ - (3-phenoxypropyl) amine.
- N, N-dibutyl- / N- (3-phenoxypropyl) amine is salified to / V, N-dibutyl- / N- (3-phenoxypropyl) amine hydrochloride.
- Lewis acids examples include SnCl 4 , AlCl 3 , FeCl 3 , TiCl 4 , BF 3 and Tf 2 O (triflic anhydride).
- the Friedel-Crafts acylation reaction of the ether-aromatic compound (13) in free base form takes place in the presence of SnCl 4 as the Lewis acid.
- the Friedel-Crafts acylation reaction of the ether-aromatic compound (13) as the hydrochloride takes place in the presence of AlCl 3 as a Lewis acid.
- the Friedel-Crafts acylation reaction can be carried out in a solvent of the dichloromethane, chlorobenzene, nitrobenzene, toluene or xylene type.
- the Friedel-Crafts acylation reaction has the advantage of deactivating the nucleus aromatics involved in this reaction, thus preventing multiple acylations.
- ketosulfonamido-benzofuran derivatives of formula (I) according to the invention and in particular of ketosulfonamido-benzofuran derivatives of formula (14), such as the dronedarone of formula (D), can also be carried out by a rearrangement of Fries according to route B described below.
- PATH B Rearranging Fries
- the synthesis process according to the invention is characterized in that the sulphonamido-benzofuran ester of formula (5) is engaged in a so-called Friesian B-lane as represented in diagram 4 above. comprising successively a step:
- the reaction of Fries takes place with the intermediate of formula (7d) for which G1 represents a n-butyl group leading to the formation of the compound (12d) which after nucleophilic substitution with CI (CH 2 ) 3N (Bu 2 leads to the formation of dronedarone of formula (D).
- the dronedarone can then be easily converted into pharmaceutically acceptable salts by addition to organic or inorganic acids as defined above, in particular hydrochloride salts by reaction with 36% hydrochloric acid hydrochloric acid at a temperature below 50 ° C.
- the reaction of Fries can take place for example in a solvent such as chlorobenzene with 4 equivalents of AlCl 3 aluminum chloride at a temperature of about 90-95 ° C for 13 to 17 hours.
- NMR spectra are carried out on a Fourier Transform Spectrometer (BRUKER) at 300 MHz (unregistered exchangeable protons);
- Solvent mixtures are quantified in volumetric ratios
- HPLC conditions are as follows:
- PCE dichloroethane
- PCM dichloromethane
- the / V, / V-diethyl- / V- (phenoxyethyl) amine hydrochloride is formed by dissolving 35 g (0.181 moles) of the former r / V, ⁇ -diethyl- / V- (phenoxyethyl) amine in 450 ml of Anhydrous MTBE and then bubbling 7 g (0.181 mol) of gaseous hydrochloric acid into the medium.
- the precipitate formed is isolated by filtration and dried in a ventilated oven at 55 ° C. for 3 h and gives 40 g of ⁇ -N, ⁇ -diethyl- / ⁇ - (phenoxyethyl) amine hydrochloride.
- the crude product is purified by dissolution in 50 ml of DCE and washed with 40 ml of 10% sodium hydroxide and 50 ml of water and finally the crude product thus obtained is purified by chromatography on silica, eluent ethyl acetate (90%). ) / methanol (10v). 2.2 g of Dronedarone are obtained at 94.6% purity.
- Example 14 Synthesis of phenyl 2-butyl-5-methanesulfonamido-benzofuran-3-carboxylate (or phenyl-2-butyl-5- (methanesulfonamido) benzofuran-3-carboxylate)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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Abstract
Description
Claims
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2828731A CA2828731A1 (fr) | 2011-03-24 | 2012-03-23 | Procede de synthese de derives de cetobenzofurane |
BR112013024156A BR112013024156A2 (pt) | 2011-03-24 | 2012-03-23 | processo de síntese de derivados de cetobenzofurano |
AU2012232898A AU2012232898A1 (en) | 2011-03-24 | 2012-03-23 | Method for synthesizing ketobenzofuran derivatives |
KR1020137027675A KR20140015483A (ko) | 2011-03-24 | 2012-03-23 | 케토 벤조퓨란 유도체의 합성 방법 |
RU2013147400/04A RU2013147400A (ru) | 2011-03-24 | 2012-03-23 | Способ получения производных кето-бензофурана |
SG2013069968A SG193506A1 (en) | 2011-03-24 | 2012-03-23 | Method for synthesizing ketobenzofuran derivatives |
JP2014500457A JP2014510092A (ja) | 2011-03-24 | 2012-03-23 | ケトベンゾフラン誘導体の合成方法 |
US14/006,027 US8962869B2 (en) | 2011-03-24 | 2012-03-23 | Process for synthesizing keto benzofuran derivatives |
CN201280025055.7A CN103562194A (zh) | 2011-03-24 | 2012-03-23 | 合成酮基-苯并呋喃衍生物的方法 |
EP12717365.6A EP2688879A1 (fr) | 2011-03-24 | 2012-03-23 | Procede de synthese de derives de cetobenzofurane |
MX2013010992A MX2013010992A (es) | 2011-03-24 | 2012-03-23 | Procedimiento para sintetizar derivados de cetobenzofurano. |
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FR1152453 | 2011-03-24 | ||
FR1152453A FR2973027A1 (fr) | 2011-03-24 | 2011-03-24 | Procede de synthese de derives de cetobenzofurane |
FR1155610 | 2011-06-24 | ||
FR1155610A FR2973028A1 (fr) | 2011-03-24 | 2011-06-24 | Procede de synthese de derives de cetobenzofurane |
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WO2012127174A1 true WO2012127174A1 (fr) | 2012-09-27 |
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PCT/FR2012/050607 WO2012127174A1 (fr) | 2011-03-24 | 2012-03-23 | Procede de synthese de derives de cetobenzofurane |
PCT/FR2012/050606 WO2012127173A1 (fr) | 2011-03-24 | 2012-03-23 | Procede de synthese de derives de cetobenzofurane |
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PCT/FR2012/050606 WO2012127173A1 (fr) | 2011-03-24 | 2012-03-23 | Procede de synthese de derives de cetobenzofurane |
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US (2) | US20140018553A1 (fr) |
EP (2) | EP2688878A1 (fr) |
JP (2) | JP2014516345A (fr) |
KR (2) | KR20140018941A (fr) |
CN (2) | CN103562193A (fr) |
AU (2) | AU2012232898A1 (fr) |
BR (2) | BR112013024156A2 (fr) |
CA (2) | CA2828389A1 (fr) |
FR (2) | FR2973027A1 (fr) |
MX (2) | MX2013010993A (fr) |
RU (2) | RU2013147400A (fr) |
SG (2) | SG193506A1 (fr) |
WO (2) | WO2012127174A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015031352A1 (fr) | 2013-08-27 | 2015-03-05 | Gilead Sciences, Inc. | Procédé de synthèse de dronédarone et des sels de celle-ci |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
HUP0900759A2 (en) | 2009-12-08 | 2011-11-28 | Sanofi Aventis | Novel process for producing dronedarone |
HUP1000010A2 (en) | 2010-01-08 | 2011-11-28 | Sanofi Sa | Process for producing dronedarone |
FR2957079B1 (fr) | 2010-03-02 | 2012-07-27 | Sanofi Aventis | Procede de synthese de derives de cetobenzofurane |
FR2958290B1 (fr) | 2010-03-30 | 2012-10-19 | Sanofi Aventis | Procede de preparation de derives de sulfonamido-benzofurane |
FR2958291B1 (fr) | 2010-04-01 | 2013-07-05 | Sanofi Aventis | Procede de preparation de derives d'amino-benzofurane |
HUP1000330A2 (en) | 2010-06-18 | 2011-12-28 | Sanofi Sa | Process for the preparation of dronedarone and the novel intermediates |
FR2962731B1 (fr) | 2010-07-19 | 2012-08-17 | Sanofi Aventis | Procede de preparation de derives d'amino-benzoyl-benzofurane |
FR2963006B1 (fr) | 2010-07-21 | 2013-03-15 | Sanofi Aventis | Procede de preparation de derives de nitro-benzofurane |
HUP1000386A2 (en) | 2010-07-22 | 2012-05-29 | Sanofi Sa | Novel process for producing dronedarone |
HUP1100165A2 (en) | 2011-03-29 | 2012-12-28 | Sanofi Sa | Process for preparation of dronedarone by n-butylation |
HUP1100167A2 (en) | 2011-03-29 | 2012-11-28 | Sanofi Sa | Process for preparation of dronedarone by mesylation |
FR2983198B1 (fr) | 2011-11-29 | 2013-11-15 | Sanofi Sa | Procede de preparation de derives de 5-amino-benzoyl-benzofurane |
EP2617718A1 (fr) | 2012-01-20 | 2013-07-24 | Sanofi | Procédé de préparation de dronédarone à l'aide d'un réactif dibutylaminopropanol |
US9221778B2 (en) | 2012-02-13 | 2015-12-29 | Sanofi | Process for preparation of dronedarone by removal of hydroxyl group |
US9249119B2 (en) | 2012-02-14 | 2016-02-02 | Sanofi | Process for the preparation of dronedarone by oxidation of a sulphenyl group |
WO2013124745A1 (fr) | 2012-02-22 | 2013-08-29 | Sanofi | Procédé pour la préparation de dronédarone par l'oxydation d'un groupe hydroxyle |
US9238636B2 (en) | 2012-05-31 | 2016-01-19 | Sanofi | Process for preparation of dronedarone by Grignard reaction |
RU2656208C1 (ru) * | 2017-11-03 | 2018-06-01 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Пермский государственный национальный исследовательский университет" | Способ получения производных 4-(бензофуран-2-ил)бутан-2-она |
CN113214199B (zh) * | 2021-04-28 | 2023-03-10 | 江西师范大学 | 一种苯并呋喃-3-氧代羧酸酯类化合物的合成方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0471609A1 (fr) * | 1990-08-06 | 1992-02-19 | Sanofi | Dérivés de Benzofuranne, Benzothiophène, Indole ou Indolizine, leur procédé de préparation ainsi que les compositions les contenant |
WO2002048132A1 (fr) * | 2000-12-11 | 2002-06-20 | Sanofi-Synthelabo | Derive de methanesulfonamido-benzofurane, son procede de preparation et son utilisation comme intermediaire de synthese |
WO2009044143A2 (fr) * | 2007-10-02 | 2009-04-09 | Cambrex Karlskoga Ab | Procédé de préparation de benzofuranes |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL146389A0 (en) * | 2001-11-08 | 2002-07-25 | Isp Finetech Ltd | Process for the preparation of dronedarone |
FR2864536B1 (fr) * | 2003-12-24 | 2006-03-17 | Clariant France Sa | Procede de preparation de n-alkyl-2 (hydroxy-4-benzoyl)-3 benzofurannes et intermediaires pour sa mise en oeuvre |
EP1931632A4 (fr) * | 2005-08-18 | 2011-05-11 | Microbia Inc | Composes indoles utiles |
GB0611210D0 (en) * | 2006-06-07 | 2006-07-19 | Cambrex Karlskoga Ab | Process |
CN101153012B (zh) * | 2006-09-29 | 2010-06-23 | 北京德众万全药物技术开发有限公司 | 一种决奈达隆关键中间体的新的制备方法 |
US8143269B2 (en) * | 2008-10-03 | 2012-03-27 | Calcimedica, Inc. | Inhibitors of store operated calcium release |
-
2011
- 2011-03-24 FR FR1152453A patent/FR2973027A1/fr active Pending
- 2011-06-24 FR FR1155610A patent/FR2973028A1/fr not_active Withdrawn
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2012
- 2012-03-23 AU AU2012232898A patent/AU2012232898A1/en not_active Abandoned
- 2012-03-23 CN CN201280025021.8A patent/CN103562193A/zh active Pending
- 2012-03-23 CA CA2828389A patent/CA2828389A1/fr not_active Abandoned
- 2012-03-23 CA CA2828731A patent/CA2828731A1/fr not_active Abandoned
- 2012-03-23 MX MX2013010993A patent/MX2013010993A/es not_active Application Discontinuation
- 2012-03-23 SG SG2013069968A patent/SG193506A1/en unknown
- 2012-03-23 RU RU2013147400/04A patent/RU2013147400A/ru not_active Application Discontinuation
- 2012-03-23 CN CN201280025055.7A patent/CN103562194A/zh active Pending
- 2012-03-23 BR BR112013024156A patent/BR112013024156A2/pt not_active IP Right Cessation
- 2012-03-23 JP JP2014500456A patent/JP2014516345A/ja active Pending
- 2012-03-23 JP JP2014500457A patent/JP2014510092A/ja active Pending
- 2012-03-23 KR KR1020137027673A patent/KR20140018941A/ko not_active Application Discontinuation
- 2012-03-23 EP EP12717364.9A patent/EP2688878A1/fr not_active Withdrawn
- 2012-03-23 US US14/006,787 patent/US20140018553A1/en not_active Abandoned
- 2012-03-23 AU AU2012232897A patent/AU2012232897A1/en not_active Abandoned
- 2012-03-23 WO PCT/FR2012/050607 patent/WO2012127174A1/fr active Application Filing
- 2012-03-23 SG SG2013069950A patent/SG193913A1/en unknown
- 2012-03-23 EP EP12717365.6A patent/EP2688879A1/fr not_active Withdrawn
- 2012-03-23 WO PCT/FR2012/050606 patent/WO2012127173A1/fr active Application Filing
- 2012-03-23 RU RU2013147413/04A patent/RU2013147413A/ru not_active Application Discontinuation
- 2012-03-23 MX MX2013010992A patent/MX2013010992A/es not_active Application Discontinuation
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0471609A1 (fr) * | 1990-08-06 | 1992-02-19 | Sanofi | Dérivés de Benzofuranne, Benzothiophène, Indole ou Indolizine, leur procédé de préparation ainsi que les compositions les contenant |
WO2002048132A1 (fr) * | 2000-12-11 | 2002-06-20 | Sanofi-Synthelabo | Derive de methanesulfonamido-benzofurane, son procede de preparation et son utilisation comme intermediaire de synthese |
WO2009044143A2 (fr) * | 2007-10-02 | 2009-04-09 | Cambrex Karlskoga Ab | Procédé de préparation de benzofuranes |
Non-Patent Citations (1)
Title |
---|
ROGER ADAMS AND LEROY WHITAKER: "Quinone imides. XXXIX. Adducts of quinone monoimides and conversion of active methylene adducts to benzofurans", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 78, no. 3, 1956, pages 658 - 663, XP002550683 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015031352A1 (fr) | 2013-08-27 | 2015-03-05 | Gilead Sciences, Inc. | Procédé de synthèse de dronédarone et des sels de celle-ci |
Also Published As
Publication number | Publication date |
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EP2688878A1 (fr) | 2014-01-29 |
AU2012232897A1 (en) | 2013-10-10 |
SG193506A1 (en) | 2013-10-30 |
WO2012127173A1 (fr) | 2012-09-27 |
FR2973028A1 (fr) | 2012-09-28 |
MX2013010992A (es) | 2013-10-17 |
SG193913A1 (en) | 2013-11-29 |
US20140018553A1 (en) | 2014-01-16 |
MX2013010993A (es) | 2013-10-17 |
BR112013024156A2 (pt) | 2016-08-09 |
CA2828731A1 (fr) | 2012-09-27 |
AU2012232898A1 (en) | 2013-10-10 |
JP2014510092A (ja) | 2014-04-24 |
US20140046078A1 (en) | 2014-02-13 |
CN103562194A (zh) | 2014-02-05 |
RU2013147400A (ru) | 2015-04-27 |
BR112013023064A2 (pt) | 2016-07-26 |
CN103562193A (zh) | 2014-02-05 |
RU2013147413A (ru) | 2015-04-27 |
CA2828389A1 (fr) | 2012-09-27 |
JP2014516345A (ja) | 2014-07-10 |
US8962869B2 (en) | 2015-02-24 |
EP2688879A1 (fr) | 2014-01-29 |
FR2973027A1 (fr) | 2012-09-28 |
KR20140018941A (ko) | 2014-02-13 |
KR20140015483A (ko) | 2014-02-06 |
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