EP2150554A1 - Forme cristalline exempte de solvant de naltrexone - Google Patents

Forme cristalline exempte de solvant de naltrexone

Info

Publication number
EP2150554A1
EP2150554A1 EP07720100A EP07720100A EP2150554A1 EP 2150554 A1 EP2150554 A1 EP 2150554A1 EP 07720100 A EP07720100 A EP 07720100A EP 07720100 A EP07720100 A EP 07720100A EP 2150554 A1 EP2150554 A1 EP 2150554A1
Authority
EP
European Patent Office
Prior art keywords
naltrexone
solvent
polymorphic form
acetate
temperature
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Withdrawn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
EP07720100A
Other languages
German (de)
English (en)
Inventor
Ulrich Weigl
Ulf KÖTZ
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
Application filed by Cilag AG filed Critical Cilag AG
Publication of EP2150554A1 publication Critical patent/EP2150554A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D489/00—Heterocyclic compounds containing 4aH-8, 9 c- Iminoethano-phenanthro [4, 5-b, c, d] furan ring systems, e.g. derivatives of [4, 5-epoxy]-morphinan of the formula:
    • C07D489/06—Heterocyclic compounds containing 4aH-8, 9 c- Iminoethano-phenanthro [4, 5-b, c, d] furan ring systems, e.g. derivatives of [4, 5-epoxy]-morphinan of the formula: with a hetero atom directly attached in position 14
    • C07D489/08—Oxygen atom
    • 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
    • A61P25/30—Drugs for disorders of the nervous system for treating abuse or dependence

Definitions

  • the present invention relates to a novel solvent-free crystalline polymorphic form of naltrexone and to processes for producing this polymorphic form.
  • Naltrexone and its derivatives and salts for example naltrexone hydrochloride, N-methylnaltrexone bromide (methylnaltrexone) or naltrexone methobromide, are known pharmaceutically active compounds, which are used in particular for reducing the psychological dependence in drug abuse.
  • the compound naltrexone as free base corresponds to the chemical formula:
  • the crystallization is usually simple and with high volume and reaction yields.
  • the dynamic vapor absorption (dynamic vapor sorption) also shows only a very low uptake of water even under high hygroscopic conditions, which is of particular importance for the practical processing and use of the modification according to the invention, whereby any water taken up is very easily removed or can be dried out.
  • the new polymorphic form is therefore particularly well suited for formulations of naltrexone in which, according to customary customer specifications, the water content in the end product must be as small as possible.
  • the present invention relates to a novel solventless crystalline polymorphic form of naltrexone which is characterized by having the following XRD data listed in Table 1:
  • naltrexone of any purity can be used.
  • the crystallization may need to be repeated.
  • the naltrexone starting product or the nalrexone crude product is dissolved in the solvent at elevated temperature, preferably at the reflux temperature of the particular solvent, in a concentration of preferably 1 (one) gram / 100 grams to 50 grams / 100 grams of the solvent. preferably stirring at the solution temperature for 10 minutes to 24 hours. Then allowed to cool to room temperature, wherein the inventive polymorphic form crystallized.
  • One purpose preferably cools the solution to a tem- perature ranging from room temperature about 20 0 C to -2O 0 C.
  • the present invention relates to a process for the preparation of a solvent-free crystalline polymorphic form of naltrexone, which comprises using as starting material any naltrexone, preferably having a purity of at least 80% (purity ⁇ 80%) in a solvent, containing at least one ester compound or a mixture of ester compounds, at elevated temperature, preferably at reflux temperature of the respective solvent, dissolves, preferably stirred at the solution temperature for ten minutes to 24 hours, and then allowed to cool, wherein the inventive polymorphic form crystallized.
  • any naltrexone preferably having a purity of at least 80% (purity ⁇ 80%) in a solvent, containing at least one ester compound or a mixture of ester compounds, at elevated temperature, preferably at reflux temperature of the respective solvent, dissolves, preferably stirred at the solution temperature for ten minutes to 24 hours, and then allowed to cool, wherein the inventive polymorphic form crystallized.
  • the solvent contains at least 80% by weight, preferably at least 90% by weight, of an ester compound or a mixture of ester compounds.
  • the Natrexon starting material is dissolved in the solvent in a concentration of preferably 1 gram / 100 grams to 50 grams / 100 grams of the solvent.
  • the mixture is preferably stirred at the solution temperature for 30 minutes to 12 hours and then allowed to cool to a temperature preferably in the range of about 2O 0 C to -20 ° C.
  • the solvents used for the crystallization according to the invention are ester compounds, in particular (C 1 -C 8 ) alkyl acetates, preferably methyl acetate, ethyl acetate, propyl acetate, butyl acetate; (C 1 -C 8 ) -alkyl butyrates, preferably methyl butyrate, ethyl butyrate, propyl butyrate, butyl butyrate; (C 1 -C 8 ) alkyl benzoates, preferably methyl benzoate, ethyl benzoate, propyl benzoate, butyl benzoate.
  • (C 1 -C 8 ) alkyl acetates preferably methyl acetate, ethyl acetate, propyl acetate, butyl acetate
  • (C 1 -C 8 ) -alkyl butyrates preferably methyl butyrate, ethyl butyrate, propyl but
  • the invention further relates to a process for the conversion of the polymorphic form according to the invention into a polymorphic form which is known per se, which comprises reacting the polymorphic form according to the invention in an alcohol, preferably a (C 1 -C 4 ) -alcohol, preferably methanol, Ethanol, propanol, butanol or in a ketone, preferably acetone, or in a mixture of these compounds, preferably in methanol, ethanol or acetone, or in a mixture of these compounds, as long as aufschlämmt until the inventive form has converted into the known polymorph.
  • an alcohol preferably a (C 1 -C 4 ) -alcohol, preferably methanol, Ethanol, propanol, butanol or in a ketone, preferably acetone, or in a mixture of these compounds, preferably in methanol, ethanol or acetone, or in a mixture of these compounds, as long as aufschlämmt
  • the mixture is slurried at a slightly elevated temperature, preferably at a temperature in the range of -20 ° C to + 4O 0 C, for a period of about 10 minutes to 24 hours, wherein the known per se forms virtually quantitative.
  • the mixture is cooled for isolating the product formed domestic product to at least room temperature, preferably to a temperature ranging from room temperature (about 20 0 C) to -2O 0 C decreases.
  • This process also offers the possibility of producing a polymorph which is known per se, by first preparing the polymorph according to the invention and then converting this into the polymorph known per se by precipitation, for example in methanol.
  • This process offers the particular advantage of producing the polymorph, which is known per se, in a very gentle manner and in a very pure form, without any partial decomposition of the naltrexone being observed, which is the customary procedure
  • the present invention also relates to the use of the polymorphs according to the invention as remedies and the
  • Example 1 10 g of crude naltrexone are suspended in 50 g of ethyl acetate and heated to reflux. After 1 hour (h) reflux, the resulting solution is cooled within 3-4 h to 0 0 C to 4 ° C and stirred for a further 1-2 h. The crystalline solid is filtered off with suction and dried in vacuo. 8g naltrexone are isolated.
  • the XRD data: NTX (Naltrexone) 985-89. D are in
  • Example 2 2g of crude naltrexone are suspended in 12g of methyl acetate and heated to reflux until all naltrexone is dissolved. The resulting solution is cooled to 20-25 ° C. within 1 h. Of the crystalline solid is filtered off and dried in vacuo. There will be 1. 0g naltrexone isolated.
  • the obtained XRD data basically correspond to the values listed in Table 1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Addiction (AREA)
  • Psychiatry (AREA)
  • Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Neurosurgery (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)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

L'invention concerne une forme polymorphe cristalline, exempte de solvant, de naltrexone, caractérisée en ce qu'elle présente les données XRD figurant sur la liste du tableau 1. L'invention concerne également un procédé de production de cette forme polymorphe, ainsi qu'un procédé de transformation de cette forme polymorphe de naltrexone en une forme polymorphe connue de naltrexone.
EP07720100A 2007-04-27 2007-04-27 Forme cristalline exempte de solvant de naltrexone Withdrawn EP2150554A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2007/000203 WO2008131567A1 (fr) 2007-04-27 2007-04-27 Forme cristalline exempte de solvant de naltrexone

Publications (1)

Publication Number Publication Date
EP2150554A1 true EP2150554A1 (fr) 2010-02-10

Family

ID=38983798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07720100A Withdrawn EP2150554A1 (fr) 2007-04-27 2007-04-27 Forme cristalline exempte de solvant de naltrexone

Country Status (3)

Country Link
US (1) US20100210675A1 (fr)
EP (1) EP2150554A1 (fr)
WO (1) WO2008131567A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2505542C1 (ru) * 2012-12-12 2014-01-27 Станислав Анатольевич Кедик Гемигидрат основания налтрексона, способ его получения и способ изготовления микросфер
WO2023156493A1 (fr) 2022-02-16 2023-08-24 Alkermes Pharma Ireland Limited Formes cristallines de naltrexone

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5668285A (en) * 1986-10-31 1997-09-16 The United States Of America As Represented By The Department Of Health And Human Services Total synthesis of northebaine, normophine, noroxymorphone enantiomers and derivatives via N-Nor intermediates
ES2129395T3 (es) * 1989-10-16 1999-06-16 Us Health Sintesis total de enantiomeros de nortebaina, normorfina, noroximorfona y sus derivados a traves de productos intermedios n-nor.
EP1628664A4 (fr) * 2003-06-04 2008-11-05 Alkermes Inc Formes polymorphes de naltrexone
US20050267157A1 (en) * 2004-05-28 2005-12-01 David White Magnesium-S-omeprazole
JP4504802B2 (ja) * 2004-12-24 2010-07-14 富士フイルム株式会社 投射型画像表示装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008131567A1 *

Also Published As

Publication number Publication date
WO2008131567A1 (fr) 2008-11-06
US20100210675A1 (en) 2010-08-19

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