EP1713768A2 - Nouvelles formes cristallines d'entacapone et fabrication - Google Patents

Nouvelles formes cristallines d'entacapone et fabrication

Info

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Withdrawn
Application number
EP04802394A
Other languages
German (de)
English (en)
Inventor
Thomas Bader
Markus Furegati
Oliver Jungmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cilag AG
Original Assignee
Cilag AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from PCT/CH2003/000853 external-priority patent/WO2005063695A1/fr
Application filed by Cilag AG filed Critical Cilag AG
Publication of EP1713768A2 publication Critical patent/EP1713768A2/fr
Withdrawn legal-status Critical Current

Links

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.

Landscapes

  • Chemical & Material Sciences (AREA)
  • 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

L'invention concerne trois nouvelles formes cristallines d'entacapone, qui sont des inhibiteurs périphériques et sélectifs de catéchol-O-méthyltransférase, pouvant être employés en combinaison avec lévodopa et un inhibiteur de décarboxylase pour le traitement du syndrome de Parkinson. Ces nouvelles formes sont obtenues par cristallisation d'entacapone dans des conditions définies. Dans certains cas, entacapone peut être employé en tant que produit brut, voire in situ en tant que produit d'une condensation de Knoevenagel de 3,4-dihydroxy-5-nitro-benzaldéhyde et de N,N-diéthyl-2-cyano-acétamide. L'invention concerne également des améliorations apportées à cette condensation en ce qui concerne le catalyseur, et la fabrication des deux composants de la condensation.
EP04802394A 2003-12-31 2004-12-27 Nouvelles formes cristallines d'entacapone et fabrication Withdrawn EP1713768A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
PCT/CH2003/000853 WO2005063695A1 (fr) 2003-12-31 2003-12-31 Nouvelles formes cristallines d'entacapone et leur production
CH9402004 2004-06-04
PCT/CH2004/000754 WO2005063696A2 (fr) 2003-12-31 2004-12-27 Nouvelles formes cristallines d'entacapone et fabrication

Publications (1)

Publication Number Publication Date
EP1713768A2 true EP1713768A2 (fr) 2006-10-25

Family

ID=34740322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04802394A Withdrawn EP1713768A2 (fr) 2003-12-31 2004-12-27 Nouvelles formes cristallines d'entacapone et fabrication

Country Status (3)

Country Link
US (1) US20080076825A1 (fr)
EP (1) EP1713768A2 (fr)
WO (1) WO2005063696A2 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA013161B1 (ru) 2005-06-08 2010-02-26 Орион Корпорейшн Дозированная форма для перорального применения
ATE445591T1 (de) * 2005-11-09 2009-10-15 Usv Ltd Verfahren zur herstellung von hochreinem (e)-n,n- diethyl-2-cyano-3-(3,4-dihydro-5- nitrophenyl)acrylamid (entacapon)
US20080300420A1 (en) * 2006-01-02 2008-12-04 Sanmar Speciality Chemicals Ltd. Process for the Preparation of Entacapone Form-A
JP5232015B2 (ja) * 2006-02-06 2013-07-10 オリオン コーポレーション エンタカポンの製造方法
WO2007094007A1 (fr) * 2006-02-13 2007-08-23 Suven Life Sciences Ltd., Procede ameliore de preparation de l'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.
EA026419B1 (ru) 2010-03-04 2017-04-28 Орион Корпорейшн Применение леводопы, карбидопы и энтакапона для лечения болезни паркинсона
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)

* Cited by examiner, † Cited by third party
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005063696A2 *

Also Published As

Publication number Publication date
WO2005063696A3 (fr) 2005-09-09
US20080076825A1 (en) 2008-03-27
WO2005063696A2 (fr) 2005-07-14

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