EP1713768A2 - Neue kristalline formen von entacapone und deren herstellung - Google Patents
Neue kristalline formen von entacapone und deren herstellungInfo
- Publication number
- EP1713768A2 EP1713768A2 EP04802394A EP04802394A EP1713768A2 EP 1713768 A2 EP1713768 A2 EP 1713768A2 EP 04802394 A EP04802394 A EP 04802394A EP 04802394 A EP04802394 A EP 04802394A EP 1713768 A2 EP1713768 A2 EP 1713768A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- entacapone
- crystalline form
- water
- preparation
- toluene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- JRURYQJSLYLRLN-BJMVGYQFSA-N entacapone Chemical compound CCN(CC)C(=O)C(\C#N)=C\C1=CC(O)=C(O)C([N+]([O-])=O)=C1 JRURYQJSLYLRLN-BJMVGYQFSA-N 0.000 title claims abstract description 57
- 229960003337 entacapone Drugs 0.000 title claims abstract description 53
- 238000004519 manufacturing process Methods 0.000 title abstract description 7
- 238000006000 Knoevenagel condensation reaction Methods 0.000 claims abstract description 19
- BBFJODMCHICIAA-UHFFFAOYSA-N 3,4-dihydroxy-5-nitrobenzaldehyde Chemical compound OC1=CC(C=O)=CC([N+]([O-])=O)=C1O BBFJODMCHICIAA-UHFFFAOYSA-N 0.000 claims abstract description 14
- RYSHIRFTLKZVIH-UHFFFAOYSA-N N,N-diethylcyanoacetamide Chemical compound CCN(CC)C(=O)CC#N RYSHIRFTLKZVIH-UHFFFAOYSA-N 0.000 claims abstract description 13
- WTDRDQBEARUVNC-LURJTMIESA-N L-DOPA Chemical compound OC(=O)[C@@H](N)CC1=CC=C(O)C(O)=C1 WTDRDQBEARUVNC-LURJTMIESA-N 0.000 claims abstract description 10
- WTDRDQBEARUVNC-UHFFFAOYSA-N L-Dopa Natural products OC(=O)C(N)CC1=CC=C(O)C(O)=C1 WTDRDQBEARUVNC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003054 catalyst Substances 0.000 claims abstract description 6
- 239000003954 decarboxylase inhibitor Substances 0.000 claims abstract description 6
- 229960004502 levodopa Drugs 0.000 claims abstract description 6
- 206010034010 Parkinsonism Diseases 0.000 claims abstract description 4
- 238000011065 in-situ storage Methods 0.000 claims abstract description 4
- 238000009833 condensation Methods 0.000 claims abstract description 3
- 230000005494 condensation Effects 0.000 claims abstract description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 45
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 28
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 25
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 18
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 17
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 claims description 16
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 16
- 238000002360 preparation method Methods 0.000 claims description 14
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 claims description 10
- 239000003814 drug Substances 0.000 claims description 9
- 239000002904 solvent Substances 0.000 claims description 9
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 8
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 claims description 8
- 229910000042 hydrogen bromide Inorganic materials 0.000 claims description 8
- 238000002441 X-ray diffraction Methods 0.000 claims description 7
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 claims description 7
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 6
- 230000002378 acidificating effect Effects 0.000 claims description 6
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 claims description 6
- MLIREBYILWEBDM-UHFFFAOYSA-N cyanoacetic acid Chemical compound OC(=O)CC#N MLIREBYILWEBDM-UHFFFAOYSA-N 0.000 claims description 6
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 6
- 229940123736 Decarboxylase inhibitor Drugs 0.000 claims description 5
- ZEHYRTJBFMZHCY-UHFFFAOYSA-N 5-nitrovanillin Chemical compound COC1=CC(C=O)=CC([N+]([O-])=O)=C1O ZEHYRTJBFMZHCY-UHFFFAOYSA-N 0.000 claims description 4
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 3
- QOSSAOTZNIDXMA-UHFFFAOYSA-N Dicylcohexylcarbodiimide Chemical compound C1CCCCC1N=C=NC1CCCCC1 QOSSAOTZNIDXMA-UHFFFAOYSA-N 0.000 claims description 3
- 230000001476 alcoholic effect Effects 0.000 claims description 3
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 3
- 239000011877 solvent mixture Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- XVMSFILGAMDHEY-UHFFFAOYSA-N 6-(4-aminophenyl)sulfonylpyridin-3-amine Chemical compound C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=N1 XVMSFILGAMDHEY-UHFFFAOYSA-N 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 230000001335 demethylating effect Effects 0.000 claims description 2
- 230000001225 therapeutic effect Effects 0.000 claims 1
- 238000002425 crystallisation Methods 0.000 abstract description 9
- 230000008025 crystallization Effects 0.000 abstract description 9
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 239000003543 catechol methyltransferase inhibitor Substances 0.000 abstract 1
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 21
- 239000000725 suspension Substances 0.000 description 20
- 239000000047 product Substances 0.000 description 12
- 239000007787 solid Substances 0.000 description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 7
- 239000012043 crude product Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 238000009835 boiling Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000005457 ice water Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- NQRYJNQNLNOLGT-UHFFFAOYSA-N Piperidine Chemical compound C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 229960004205 carbidopa Drugs 0.000 description 3
- TZFNLOMSOLWIDK-JTQLQIEISA-N carbidopa (anhydrous) Chemical compound NN[C@@](C(O)=O)(C)CC1=CC=C(O)C(O)=C1 TZFNLOMSOLWIDK-JTQLQIEISA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 239000012065 filter cake Substances 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- MCSXGCZMEPXKIW-UHFFFAOYSA-N 3-hydroxy-4-[(4-methyl-2-nitrophenyl)diazenyl]-N-(3-nitrophenyl)naphthalene-2-carboxamide Chemical compound Cc1ccc(N=Nc2c(O)c(cc3ccccc23)C(=O)Nc2cccc(c2)[N+]([O-])=O)c(c1)[N+]([O-])=O MCSXGCZMEPXKIW-UHFFFAOYSA-N 0.000 description 2
- -1 5-nitrophenyl Chemical group 0.000 description 2
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 2
- 102000006378 Catechol O-methyltransferase Human genes 0.000 description 2
- 108020002739 Catechol O-methyltransferase Proteins 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical group CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000006317 isomerization reaction Methods 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- CQQUWTMMFMJEFE-UHFFFAOYSA-N 2-chloro-n,n-diethylacetamide Chemical compound CCN(CC)C(=O)CCl CQQUWTMMFMJEFE-UHFFFAOYSA-N 0.000 description 1
- JRURYQJSLYLRLN-UHFFFAOYSA-N 2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)-N,N-diethyl-2-propenamide Chemical compound CCN(CC)C(=O)C(C#N)=CC1=CC(O)=C(O)C([N+]([O-])=O)=C1 JRURYQJSLYLRLN-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000010533 azeotropic distillation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229940087613 comtan Drugs 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000017858 demethylation Effects 0.000 description 1
- 238000010520 demethylation reaction Methods 0.000 description 1
- 125000001664 diethylamino group Chemical group [H]C([H])([H])C([H])([H])N(*)C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 229910000043 hydrogen iodide Inorganic materials 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- SYSQUGFVNFXIIT-UHFFFAOYSA-N n-[4-(1,3-benzoxazol-2-yl)phenyl]-4-nitrobenzenesulfonamide Chemical class C1=CC([N+](=O)[O-])=CC=C1S(=O)(=O)NC1=CC=C(C=2OC3=CC=CC=C3N=2)C=C1 SYSQUGFVNFXIIT-UHFFFAOYSA-N 0.000 description 1
- 229940078552 o-xylene Drugs 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 125000000587 piperidin-1-yl group Chemical group [H]C1([H])N(*)C([H])([H])C([H])([H])C([H])([H])C1([H])[H] 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229940124597 therapeutic agent Drugs 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C255/00—Carboxylic acid nitriles
- C07C255/01—Carboxylic acid nitriles having cyano groups bound to acyclic carbon atoms
- C07C255/32—Carboxylic acid nitriles having cyano groups bound to acyclic carbon atoms having cyano groups bound to acyclic carbon atoms of a carbon skeleton containing at least one six-membered aromatic ring
- C07C255/41—Carboxylic acid nitriles having cyano groups bound to acyclic carbon atoms having cyano groups bound to acyclic carbon atoms of a carbon skeleton containing at least one six-membered aromatic ring the carbon skeleton being further substituted by carboxyl groups, other than cyano groups
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
- A61P25/14—Drugs for disorders of the nervous system for treating abnormal movements, e.g. chorea, dyskinesia
- A61P25/16—Anti-Parkinson drugs
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B2200/00—Indexing scheme relating to specific properties of organic compounds
- C07B2200/13—Crystalline forms, e.g. polymorphs
Definitions
- Entacapone is the short name for (E) -N, N-diethyl-2-cyano-3- (3, 4-dihydroxy-5-nitrophenyl) acrylamide.
- Entacapone is a peripheral and selective catechol-O-methyltransferase (COMT) inhibitor which is used in combination with levodopa (L-dopa) and a decarboxylase inhibitor (e.g. carbidopa) to treat Parkinson's syndrome.
- L-dopa levodopa
- a decarboxylase inhibitor e.g. carbidopa
- Entacapone increases the bioavailability of L-dopa and also extends its duration of action. This effect allows the amount of L-dopa to be administered to be reduced by 10-30% by extending the dosing interval and / or reducing the single dose of L-dopa.
- the preparation is under the name
- N, N-diethyl-2-cyano-3- (3, 4-dihydroxy ⁇ 5-nitrophenyl) acrylamide is carried out according to the abovementioned patents by a Knoevenagel condensation of 3,4-dihydroxy-5-nitrobenzaldehyde, the is obtained by demethylation of 5-nitrovanillin with HBr, and N, N-diethyl-2-cyanoacetamide.
- This Knoevenagel condensation is carried out in the presence of a catalytic amount of piperidine / acetic acid carried out as a catalyst.
- crystallographically essentially pure polymorphic form A of entacapone means that at most 3% and preferably at most 2% of another polymorphic form or of the Z isomer is present.
- the crude product obtained from the Knoevenagel condensation 70-80% E isomer and 30-20% Z isomer
- acetic acid with catalytic amounts of HBr or HC1 and then heated to 90 ° C.
- the product crystallizes out in the desired polymorphic form A by slow cooling (yield: 80%).
- Form C is characterized by the following XRD data:
- Form E of Entacapone is characterized by the following XRD data: Note: The intensities may vary due to texture effects.
- the crystalline forms C, D and E of entacapone according to the invention are suitable for use as therapeutic agents. They can be processed into medicaments which contain the crystalline form C and / or the crystalline form D and / or the crystalline form E of entacapone and a therapeutically inert carrier using customary auxiliaries. Conveniently, these drugs additionally contain levodopa and a decarboxylase inhibitor, e.g. Carbidopa.
- Entacapone's new crystalline forms C, D and E expand the possibilities of drug treatment for patients. So it can be of great benefit to the patient if, for. B. due to the properties of these new crystalline forms, the bioavailability of entacapone is increased (the bioavailability of commercially available entacapone is only 35%) and thus the dose can be reduced or the dose intervals can be increased. This would not only reduce the undesirable side effects of entacapone, which occur more frequently, especially at higher doses than at lower ones, but also mean a reduction in drug costs.
- the crystalline forms C and / or D and / or E of entacapone can be used in the treatment of Parkinson's syndrome or for the production of corresponding medicaments.
- crystalline form C of entacapone can be prepared by crystallizing entacapone from a mixture of at least one aromatic and at least one aliphatic hydrocarbon.
- Toluene is preferably used as the aromatic hydrocarbon and n-heptane is preferably used as the aliphatic hydrocarbon.
- Other suitable aromatic and aliphatic hydrocarbons are benzene and alkyl-substituted derivatives, e.g. B. p-xylene, o-xylene, ethylbenzene and the like or n-pentane, n-hexane,
- Petroleum ether and the like The temperature of course depends to a certain extent on the hydrocarbons used; generally it is conveniently in a range from about room temperature to about 100 ° C.
- Entacapone's Form C crystallized solid can be recovered by filtration at about 90 ° C or by filtration after cooling to about room temperature and allowing to stand for several hours, for example, about 14 hours.
- the crystalline form D of entacapone can be prepared according to the invention by dissolving entacapone a) in a water-miscible solvent and adding this solution to water or a mixed aqueous system, with crystallization occurring immediately; or b) crystallized in a non-acidic solvent or a solvent mixture with at least one non-acidic component in the presence of a strong acid.
- crude or purified entacapone can be used, but not an E / Z mixture, as is the case with the Knoevenagel condensation of 3,4-dihydroxy-5-nitro-benzaldehyde and N, N-diethyl-2-cyano - acetamide is produced.
- the product of this Knoevenagel condensation of 3,4-dihydroxy-5-nitro-benzaldehyde and N, N-diethyl-2-cyano-acetamide can be used in situ, as an E / Z isomer mixture, without that this must be isolated beforehand and separated into its components; when treated with a strong acid, the Z isomer present in the mixture of isomers to about 30% largely converts to the E isomer, and the E isomer is predominantly obtained in the polymorphic form D.
- Hydrogen bromide is preferably used as the strong acid for process variant b); other suitable acids are hydrogen chloride, hydrogen iodide, sulfuric acid in the presence of alkali halides and the like.
- the crystallization to form D takes place according to process variant a) in a mixture of water and at least one water-miscible organic solvent, preferably in THF / water, acetone / water, acetone / DMSO / water or n-propanol / water; and according to process variant b) by acid treatment in a non-acidic solvent or a mixture of organic solvents with at least one non-acidic component, preferably in toluene / acetonitrile or toluene / acetonitrile / acetic acid.
- Process variant b) is preferred in the context of the present invention, and in a particularly preferred embodiment of this process variant b), hydrogen bromide is used as the strong acid and toluene / acetonitrile / acetic acid is used as the solvent mixture.
- the temperature naturally depends to a certain extent on the process variant used and the reaction medium used; In general, it is expediently in a range from approximately -10 ° C. to approximately 30 ° C., for the system isopropanol / hexane mentioned in connection with process variant b), however, in a range from approximately 0 ° C. to approximately 68 ° C.
- the crystalline form E of entacapone can be prepared by dissolving entacapone in a polar aprotic or alcoholic solvent and adding this solution to an aliphatic hydrocarbon which is immiscible with this solvent and in which entacapone is not soluble.
- the crystallization to form E is expediently carried out in a mixture of a polar aprotic or alcoholic organic solvent and an immiscible aliphatic hydrocarbon, preferably THF / n-hexane, THF / n-pentane, THF / cyclohexane or isopropanol / n-hexane.
- a polar aprotic or alcoholic organic solvent preferably THF / n-hexane, THF / n-pentane, THF / cyclohexane or isopropanol / n-hexane.
- Raw or purified entacapone can be used for the production of Form E from entacapone, but not an E / Z mixture, as is the case with the Knoevenagel condensation of 3,4-dihydroxy-5-nitro-benzaldehyde and N, N-diethyl -2-cyano-acetamide is obtained.
- This Knoevenagel condensation can also be improved according to the invention by preparing the N, N-diethyl-2-cyano-acetamide used by reacting cyanoacetic acid with diethylamine in the presence of dicyclohexylcarbodiimide.
- This is advantageous compared to conventional processes for the preparation of N, N-diethyl-2-cyano-acetamide in that low yields or the use of relatively expensive chemicals (such as 2-chloro-N, N-diethylacetamide or butyllithium) or in technical Scale that can only be avoided with difficulty realizable conditions (such as -70 ° C) and that the product without previous
- the Knoevenagel condensation can be improved according to the invention by producing the 3,4-dihydroxy-5-nitro-benzaldehyde used by demethylating 5-nitrovanillin using AlCl 3 / pyridine in chlorobenzene.
- the 3,4-dihydroxy-5-nitro-benzaldehyde thus obtained is obtained in high yield and its good purity allows it to be used as a crude product in the Knoevenagel condensation without prior purification.
- Knoevenagel condensation can expediently be carried out by heating 3,4-dihydroxy-5-nitrobenzaldehyde, crude N, N-diethyl-2-cyanoacetamide, acetic acid and diethylamine in toluene, the water formed by azeotropic distillation using a water separator Will get removed.
- the crude product is dissolved with warming in acetone / water (10/1) and the solution is dropped into an ice-cold mixture of acetone and water (5/95).
- the entacapone is obtained in a uniform polymorphic form and in an HPLC purity of 99.7%.
- An examination of the polymorphic forms during the process has shown that the new polymorphic form D, possibly partly in a mixture with the new form C and / or the new form E, is already present after the first precipitation from cold toluene.
- Form D can convert to a mixture of Forms C and D in the 2-propanol / water slurry.
- the almost pure polymorphic form D is obtained in the last precipitation of entacapone from acetone and water.
- the overall yield is> 70%.
- Example 2 Preparation of N, N-Diethyl-2-cyano-acetamide 25.0 g of cyanoacetic acid were dissolved in 163.08 g of ethyl acetate. 21.70 g of diethylamine were slowly added to the colorless solution obtained in such a way that the internal temperature did not exceed 25 ° C. A solution of 61.10 g of dicyclohexylcarbodiimide in 54.06 g of ethyl acetate was then added dropwise, a solid slowly precipitating out. After the addition, the suspension was stirred at 35-40 ° C overnight. After the reaction had ended, the suspension was cooled to 20-25 ° C. and suction filtered.
- the solid was washed with 64.87 g of ethyl acetate.
- the combined filtrates were concentrated in vacuo, a solid precipitating out.
- the suspension was taken up in 45.05 g of ethyl acetate, and the mixture was stirred 20-25 ° C, the solid was filtered off and washed with 45.05 g of ethyl acetate.
- the combined filtrates were again concentrated in vacuo.
- the residue was taken up in 18.02 g of ethyl acetate, filtered, washed with 13.52 g of ethyl acetate and the filtrate was concentrated in vacuo.
- Example 3 Preparation of entacapones in polymorphic form D.
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- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Neurosurgery (AREA)
- Psychology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Pharmacology & Pharmacy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CH2003/000853 WO2005063695A1 (de) | 2003-12-31 | 2003-12-31 | Neue kristalline formen von entacapone und deren herstellung |
| CH9402004 | 2004-06-04 | ||
| PCT/CH2004/000754 WO2005063696A2 (de) | 2003-12-31 | 2004-12-27 | Neue kristalline formen von entacapone und deren herstellung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1713768A2 true EP1713768A2 (de) | 2006-10-25 |
Family
ID=34740322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04802394A Withdrawn EP1713768A2 (de) | 2003-12-31 | 2004-12-27 | Neue kristalline formen von entacapone und deren herstellung |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20080076825A1 (de) |
| EP (1) | EP1713768A2 (de) |
| WO (1) | WO2005063696A2 (de) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE444746T1 (de) | 2005-06-08 | 2009-10-15 | Orion Corp | Eine herstellungsmethode von entacapon- enthaltenden granulaten für orale dosierformen |
| US20080319226A1 (en) * | 2005-11-09 | 2008-12-25 | Usv Limited | Process For the Preparation of Highly Pure (E) N,N-Diethyl-2-Cyano-3-(3,4-Dihydroxy-5-Nitro Phenyl) Acrylamide (Entacapone) |
| EP1976824A1 (de) * | 2006-01-02 | 2008-10-08 | Actavis Group PTC EHF | Verfahren zur herstellung der form a von entacapon |
| CA2641396C (en) * | 2006-02-06 | 2014-07-22 | Orion Corporation | Process for manufacturing entacapone |
| WO2007094007A1 (en) * | 2006-02-13 | 2007-08-23 | Suven Life Sciences Ltd., | An improved process for the preparation of entacapone |
| GB0610207D0 (en) * | 2006-05-23 | 2006-07-05 | Pliva Istrazivanje I Razvoj D | New forms of active pharmaceutical ingredient |
| GB0613826D0 (en) * | 2006-07-12 | 2006-08-23 | Pliva Istrazivanje I Razvoj D | Process and product |
| ES2306587B1 (es) * | 2006-11-15 | 2009-08-07 | Quimica Sintetica, S.A. | Nueva forma cristalina de entacapona y procedimiento para su obtencion. |
| ES2319024B1 (es) | 2007-02-13 | 2009-12-11 | Quimica Sintetica, S.A. | Procedimiento para la obtencion de entacapona sustancialmente libre de isomero z, sus intermedios de sintesis y nueva forma cristalina. |
| KR101868326B1 (ko) | 2010-03-04 | 2018-06-19 | 오리온 코포레이션 | 파킨슨병의 치료를 위한 레보도파, 카르비도파 및 엔타카폰의 용도 |
| CN105061259A (zh) * | 2015-08-25 | 2015-11-18 | 重庆植恩药业有限公司 | 一种恩他卡朋a型晶的制备方法 |
| CN108929202B (zh) * | 2017-05-24 | 2021-02-19 | 中国人民解放军军事医学科学院生物医学分析中心 | 2-叔丁基-4-甲氧基苯酚制备新方法及其新晶型 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5283352A (en) * | 1986-11-28 | 1994-02-01 | Orion-Yhtyma Oy | Pharmacologically active compounds, methods for the preparation thereof and compositions containing the same |
| GB2238047B (en) * | 1989-11-03 | 1993-02-10 | Orion Yhtymae Oy | Stable polymorphic form of (e)-n,n-diethyl-2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)acrylamide and the process for its preparation |
-
2004
- 2004-12-27 EP EP04802394A patent/EP1713768A2/de not_active Withdrawn
- 2004-12-27 WO PCT/CH2004/000754 patent/WO2005063696A2/de not_active Ceased
- 2004-12-27 US US10/584,900 patent/US20080076825A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005063696A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080076825A1 (en) | 2008-03-27 |
| WO2005063696A2 (de) | 2005-07-14 |
| WO2005063696A3 (de) | 2005-09-09 |
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