WO2012127173A1 - Procede de synthese de derives de cetobenzofurane - Google Patents
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- WO2012127173A1 WO2012127173A1 PCT/FR2012/050606 FR2012050606W WO2012127173A1 WO 2012127173 A1 WO2012127173 A1 WO 2012127173A1 FR 2012050606 W FR2012050606 W FR 2012050606W WO 2012127173 A1 WO2012127173 A1 WO 2012127173A1
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- 0 CC(c1c(*)[o]c2ccc(*)cc12)=O Chemical compound CC(c1c(*)[o]c2ccc(*)cc12)=O 0.000 description 3
- JCQVYHIAOQSWRO-UHFFFAOYSA-N CC(C(C(OI)=O)c(cc(cc1)NS(c2ccccc2)(=O)=O)c1O)=O Chemical compound CC(C(C(OI)=O)c(cc(cc1)NS(c2ccccc2)(=O)=O)c1O)=O JCQVYHIAOQSWRO-UHFFFAOYSA-N 0.000 description 1
- MAJPTPADBSFNIV-UHFFFAOYSA-N CCCCc1c(C(Cl)=O)c2cc(NS(C)(=O)=O)ccc2[o]1 Chemical compound CCCCc1c(C(Cl)=O)c2cc(NS(C)(=O)=O)ccc2[o]1 MAJPTPADBSFNIV-UHFFFAOYSA-N 0.000 description 1
- QFIMDPDMUVGQAY-UHFFFAOYSA-N CCCCc1c(C(O)=O)c(cc(cc2)NS(C)(=O)=O)c2[o]1 Chemical compound CCCCc1c(C(O)=O)c(cc(cc2)NS(C)(=O)=O)c2[o]1 QFIMDPDMUVGQAY-UHFFFAOYSA-N 0.000 description 1
- JROFWMNXCDKHBD-UHFFFAOYSA-N CCCCc1c(C(Oc2ccccc2)=O)c2cc(NS(C)(=O)=O)ccc2[o]1 Chemical compound CCCCc1c(C(Oc2ccccc2)=O)c2cc(NS(C)(=O)=O)ccc2[o]1 JROFWMNXCDKHBD-UHFFFAOYSA-N 0.000 description 1
- WKFHEWCOYQNAQR-UHFFFAOYSA-N CCCCc1c(C(c(cc2)ccc2O)=O)c2cc(NS(C)(=O)=O)ccc2[o]1 Chemical compound CCCCc1c(C(c(cc2)ccc2O)=O)c2cc(NS(C)(=O)=O)ccc2[o]1 WKFHEWCOYQNAQR-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
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- 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 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 of the environment related to an industrialization of such a synthesis 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:
- 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 is n-butyl;
- G3 represents (i) a group -NHS0 2 c or (ii) a group -NHRc, wherein Rc is (a) alkyl, linear or branched, preferably an alkyl group C1-C8, even more preferably an alkyl group C1-C4, such as for example a methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl or tert-butyl group, (b) a cycloalkyl group or (c) an aryl group, substituted or unsubstituted , advantageously G 3 represents a group -NHSO 2 alkyl or a group -NHSO 2 aryl, even more advantageously G 3 represents a group - NHS0 2 CH 3 ;
- 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, 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 invention relates to a process for the synthesis of a cetobenzofuran derivative, in basic form (i), (ii) an acid addition salt, advantageously dronedarone or its hydrochloride salt, said cetobenzofuran derivative being of formula (I) below:
- 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 is n-butyl;
- G3 represents (i) a group -NHS0 2 c or (ii) a group -NHRc, wherein Rc is (a) alkyl, linear or branched, preferably an alkyl group C1-C8, even more preferably an alkyl group C1-C4, such as for example a methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl or tert-butyl group, (b) a cycloalkyl group or (c) an aryl group, substituted or unsubstituted , advantageously G 3 represents a group -NHSO 2 alkyl or a group -NHSO 2 aryl, even more advantageously G 3 represents a group -
- 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 chosen from the hydrogen atom, the -alkyleneaminoalkyl groups, advantageously Rb represents a 3- (di-n-butylamino) -propyl group;
- Ra represents a substituent chosen from halogen atoms, alkyl, haloalkyl, alkoxy and alkoxyalkyl groups, advantageously Ra represents a substituent chosen from halogen atoms and alkyl groups, n is an index equal to 0, 1, 2 , 3 or 4,
- ⁇ from 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 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. According to another aspect, 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. organic or inorganic compounds, for example the salts defined above for the formula (I), said compounds (II), (VIII) and (IX) being of the 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).
- the invention also relates to synthetic intermediates such as the compounds of formula (II) in base form, or of pharmaceutically acceptable salts of addition to organic or inorganic acids, said compound (II) being of the following formula:
- G1 is as defined for the ketobenzofuran of formula (I) above;
- G 2 is chosen from halogen atoms, the -OH group, the alkoxy, aryloxy and -NRdRe groups with Rd and Re being identical or different and being chosen, independently of one another, from the atom of hydrogen, alkyl groups and aryl groups, said aryl and alkyl groups being optionally substituted;
- G3 represents (i) a group -NHS0 2 Rc or (ii) a group -NHRc, where Rc represents (a) a linear or branched alkyl group or (b) a cycloalkyl group.
- the invention also relates to synthetic intermediates such as the compounds of formula (VIII), in base form, or of pharmaceutically acceptable salts of addition to organic or inorganic acids, said compound (VIII ) being of the following formula:
- G1 is as defined for the ketobenzofuran of formula (I) above;
- G 2 is chosen from halogen atoms, the -OH group, the alkoxy, aryloxy and -NRdRe groups with Rd and Re being identical or different and being chosen, independently of one another, from the atom of hydrogen, alkyl groups and aryl groups, said aryl and alkyl groups being optionally substituted;
- 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) a substituted aryl group.
- the invention also relates to synthetic intermediates such as compounds of formula (IX), in base form, or of pharmaceutically acceptable salts of addition to organic or inorganic acids, said compound (IX ) being of the following formula:
- G1 and G3 are as defined for the ketobenzofuran of formula (I) according to above and in which the group G2 is chosen from halogen atoms, the group -OH, the alkoxy groups, aryloxy groups and -NRdRe groups. with Rd and Re being identical or different and being selected independently from each other, from among the hydrogen atom, the alkyl groups and the aryl groups, said aryl and alkyl groups being optionally substituted.
- the invention also relates to synthetic intermediates such as the compounds of formula (12) in base form, or of pharmaceutically acceptable salts of addition to organic or inorganic acids, said compound being of formula next :
- the invention also relates to synthetic intermediates such as the compounds of formula (12) in base form, or of pharmaceutically acceptable salts of addition to organic or inorganic acids, said compound being of following formula:
- G1 represents a haloalkyl, cycloalkyl, aryl, substituted or unsubstituted group, alkene or alkyne,
- Ra, Rb, Rc and Na are as defined for cetobenzofuran (I) above.
- 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.
- a haloalkyl group an alkyl group as defined above substituted with 1, 2, 3, 4 or 5 halogen atoms, as defined previously.
- the -halogeno (C1-C5) alkyl groups with (C1-C5) alkyl as defined above for example for example the trifluoromethyl group (abbreviated -CF 3 ) and the group -CH 2 -CF 3 ;
- 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.
- 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 of the other, so as to be identical or different, when they are 2 in number or independently of each other, so as to be identical or different, when they number 3.
- Pyridyl groups may be mentioned furanyl, pyrrolyl;
- 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 substitution reaction, 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 -CH 3 group;
- 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 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 halogen atoms and alkyl groups, still 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 ;
- said process comprising a Friedel and Crafts acylation reaction, said reactions taking place from the sulphonamido-benzofuran intermediate of formula (III), that is to say a compound of formula (II) for which G3 represents -NH-S0 2 -c,
- G1 and Rc are as defined above and the group G2 is chosen from halogen atoms, the -OH group, the alkoxy, aryloxy and -NRdRe groups with Rd and Re being identical or different and being chosen , independently of one another, among the 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 selected 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 an Rb radical which is a group - (CH2) 3N [(CH 2 ) 3 CH 3 ] 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 hydrochloride form.
- 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 aromatic derivative benzofuran (II).
- This reaction can take place for example in an aprotic solvent such as DMF or dioxane.
- the cyclization / dehydration can take place in a 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 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.
- RcS (O) 2 CI RcS (O) 2 CI, with Rc as defined above, in the presence of a base.
- 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 N-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 an acid Lewis, such as for example vanadyl acetylacetonate, in benzene or toluene.
- an acid Lewis 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.
- 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 ") with from said sulfonamido-benzofuran acid (8); Friedel acylation and Crafts of the ether aromatic (13) with Rb, Ra and Na as defined above, by said acyl sulfonamido-benzofuran halide of formula (9), in particular acyl sulphonamido bromide benzofuran of formula (9 ') or the acyl sulphonamido-benzofuran chloride of formula (9 ") leading to the formation of said ketosulfonamido-benzofuran derivative of formula (14) according to the invention.
- 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.
- the sulphonamido-benzofuran acid of formula (8) is converted into acyl sulphonamido-benzofuran bromide of formula (9 ') by reaction with thionyl bromide or oxalyl bromide.
- 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 acylation reaction of Friedel-Crafts étheraromatique of compound (13) as the free base takes place in the presence of SnCl 4 as the Lewis acid.
- the acylation reaction of Friedel-Crafts étheraromatique of compound (13) as hydrochloride in the presence of AlCl 3 as the Lewis acid 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 aromatic ring involved in this reaction, thereby 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.
- the synthesis method according to the invention is characterized in that the sulphonamido-benzofuran ester of formula (5) is engaged in a so-called Friesian B-channel as represented in diagram 4 above successively comprising 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.
- 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.
- 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:
- 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.
- cetobenzofuran derivative in the form of (i) base, (ii) an acid addition salt, advantageously dronedarone or its hydrochloride salt, the following cetobenz derivative I):
- 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 c or (ii) a group -NHRc wherein
- Rc represents (a) a linear or branched alkyl group, (b) a cycloalkyl group or (c) a substituted or unsubstituted aryl group;
- 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 represents a substituent chosen from halogen atoms, alkyl, haloalkyl, alkoxy and alkoxyalkyl groups,
- na is an index equal to 0, 1, 2, 3 or 4,
- the groups G1 and G3 are as defined above and in which the group G2 is chosen from halogen atoms, the group -OH, the alkoxy, aryloxy and -NRdRe groups with Rd and Re being identical or different. and being selected, independently of one another, from the hydrogen atom, the
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Priority Applications (11)
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BR112013023064A BR112013023064A2 (pt) | 2011-03-24 | 2012-03-23 | processo de síntese de derivados de cetobenzofurano |
MX2013010993A MX2013010993A (es) | 2011-03-24 | 2012-03-23 | Procedimiento para sintetizar derivados de ceto-benzofurano. |
SG2013069950A SG193913A1 (en) | 2011-03-24 | 2012-03-23 | Process for synthesizing keto-benzofuran derivatives |
CN201280025021.8A CN103562193A (zh) | 2011-03-24 | 2012-03-23 | 合成酮基-苯并呋喃衍生物的方法 |
CA2828389A CA2828389A1 (fr) | 2011-03-24 | 2012-03-23 | Procede de synthese de derives de cetobenzofurane |
EP12717364.9A EP2688878A1 (fr) | 2011-03-24 | 2012-03-23 | Procede de synthese de derives de cetobenzofurane |
RU2013147413/04A RU2013147413A (ru) | 2011-03-24 | 2012-03-23 | Способ синтеза производных кето-бензофурана |
AU2012232897A AU2012232897A1 (en) | 2011-03-24 | 2012-03-23 | Process for synthesizing keto-benzofuran derivatives |
KR1020137027673A KR20140018941A (ko) | 2011-03-24 | 2012-03-23 | 케토-벤조퓨란 유도체의 합성 방법 |
JP2014500456A JP2014516345A (ja) | 2011-03-24 | 2012-03-23 | ケト−ベンゾフラン誘導体の合成方法 |
US14/006,787 US20140018553A1 (en) | 2011-03-24 | 2012-03-23 | Process for synthesizing keto-benzofuran derivatives |
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FR1152453A FR2973027A1 (fr) | 2011-03-24 | 2011-03-24 | Procede de synthese de derives de cetobenzofurane |
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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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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) |
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WO (2) | WO2012127174A1 (fr) |
Cited By (17)
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US8501971B2 (en) | 2009-12-08 | 2013-08-06 | Sanofi | Process for the preparation of dronedarone |
US8658809B2 (en) | 2010-01-08 | 2014-02-25 | Sanofi | Process for the preparation of dronedarone |
US8686180B2 (en) | 2010-04-01 | 2014-04-01 | Sanofi | Process for preparing aminobenzofuran derivatives |
US8748636B2 (en) | 2010-07-21 | 2014-06-10 | Sanofi | Process for preparing benzofuran derivatives substituted at position 5 |
US8796489B2 (en) | 2010-03-02 | 2014-08-05 | Sanofi | Ketobenzofuran derivatives, method for synthesizing same, and intermediates |
US8816103B2 (en) | 2010-07-22 | 2014-08-26 | Sanofi | Process for the preparation of dronedarone |
US8884033B2 (en) | 2010-07-19 | 2014-11-11 | Sanofi | Process for preparing aminobenzoylbenzofuran derivatives |
US9174958B2 (en) | 2010-06-18 | 2015-11-03 | Sanofi | Process for the preparation of dronedarone |
US9174959B2 (en) | 2011-03-29 | 2015-11-03 | Sanofi | Process for preparation of dronedarone by N-butylation |
US9193703B2 (en) | 2011-03-29 | 2015-11-24 | Sanofi | Process for preparation of dronedarone by mesylation |
US9221777B2 (en) | 2012-01-20 | 2015-12-29 | Sanofi | Process for preparation of dronedarone by the use of dibutylaminopropanol reagent |
US9221778B2 (en) | 2012-02-13 | 2015-12-29 | Sanofi | Process for preparation of dronedarone by removal of hydroxyl group |
US9238636B2 (en) | 2012-05-31 | 2016-01-19 | Sanofi | Process for preparation of dronedarone by Grignard reaction |
US9249119B2 (en) | 2012-02-14 | 2016-02-02 | Sanofi | Process for the preparation of dronedarone by oxidation of a sulphenyl group |
US9334254B2 (en) | 2010-03-30 | 2016-05-10 | Sanofi | Process for preparing sulfonamidobenzofuran derivatives |
US9382223B2 (en) | 2012-02-22 | 2016-07-05 | Sanofi | Process for preparation of dronedarone by oxidation of a hydroxyl group |
US9499507B2 (en) | 2011-11-29 | 2016-11-22 | Sanofi | Method for preparing 5-amino-benzoyl-benzofuran derivatives |
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TW201536763A (zh) | 2013-08-27 | 2015-10-01 | Gilead Sciences Inc | 製備決奈達隆或其鹽類之製程 |
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 |
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US8501971B2 (en) | 2009-12-08 | 2013-08-06 | Sanofi | Process for the preparation of dronedarone |
US8889734B2 (en) | 2009-12-08 | 2014-11-18 | Sanofi | Process for the preparation of dronedarone |
US8658809B2 (en) | 2010-01-08 | 2014-02-25 | Sanofi | Process for the preparation of dronedarone |
US8796489B2 (en) | 2010-03-02 | 2014-08-05 | Sanofi | Ketobenzofuran derivatives, method for synthesizing same, and intermediates |
US9334254B2 (en) | 2010-03-30 | 2016-05-10 | Sanofi | Process for preparing sulfonamidobenzofuran derivatives |
US8686180B2 (en) | 2010-04-01 | 2014-04-01 | Sanofi | Process for preparing aminobenzofuran derivatives |
US9174958B2 (en) | 2010-06-18 | 2015-11-03 | Sanofi | Process for the preparation of dronedarone |
US8884033B2 (en) | 2010-07-19 | 2014-11-11 | Sanofi | Process for preparing aminobenzoylbenzofuran derivatives |
US8748636B2 (en) | 2010-07-21 | 2014-06-10 | Sanofi | Process for preparing benzofuran derivatives substituted at position 5 |
US8816103B2 (en) | 2010-07-22 | 2014-08-26 | Sanofi | Process for the preparation of dronedarone |
US9193703B2 (en) | 2011-03-29 | 2015-11-24 | Sanofi | Process for preparation of dronedarone by mesylation |
US9174959B2 (en) | 2011-03-29 | 2015-11-03 | Sanofi | Process for preparation of dronedarone by N-butylation |
US9611242B2 (en) | 2011-03-29 | 2017-04-04 | Sanofi | Process for preparation of dronedarone by N-butylation |
US9499507B2 (en) | 2011-11-29 | 2016-11-22 | Sanofi | Method for preparing 5-amino-benzoyl-benzofuran derivatives |
US9221777B2 (en) | 2012-01-20 | 2015-12-29 | Sanofi | Process for preparation of dronedarone by the use of dibutylaminopropanol reagent |
US9708281B2 (en) | 2012-01-20 | 2017-07-18 | Sanofi | Process for preparation of dronedarone by the use of dibutylaminopropanol reagent |
US9221778B2 (en) | 2012-02-13 | 2015-12-29 | Sanofi | Process for preparation of dronedarone by removal of hydroxyl group |
US9701654B2 (en) | 2012-02-13 | 2017-07-11 | 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 |
US9382223B2 (en) | 2012-02-22 | 2016-07-05 | Sanofi | Process for preparation of dronedarone by oxidation of a hydroxyl group |
US9238636B2 (en) | 2012-05-31 | 2016-01-19 | Sanofi | Process for preparation of dronedarone by Grignard reaction |
Also Published As
Publication number | Publication date |
---|---|
EP2688878A1 (fr) | 2014-01-29 |
AU2012232897A1 (en) | 2013-10-10 |
SG193506A1 (en) | 2013-10-30 |
FR2973028A1 (fr) | 2012-09-28 |
WO2012127174A1 (fr) | 2012-09-27 |
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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