EP2475636A1 - Procédé pour préparer des cristaux de forme a et forme b de dexkétoprofène trométamol - Google Patents

Procédé pour préparer des cristaux de forme a et forme b de dexkétoprofène trométamol

Info

Publication number
EP2475636A1
EP2475636A1 EP09786483A EP09786483A EP2475636A1 EP 2475636 A1 EP2475636 A1 EP 2475636A1 EP 09786483 A EP09786483 A EP 09786483A EP 09786483 A EP09786483 A EP 09786483A EP 2475636 A1 EP2475636 A1 EP 2475636A1
Authority
EP
European Patent Office
Prior art keywords
dexketoprofen
trometamol
appropriate solvent
crystallization
solvent
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Withdrawn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
EP09786483A
Other languages
German (de)
English (en)
Inventor
Farhad Farshi
Serdar Soylemez
Fikret Koc
Semih Durmus
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.)
Abdi Ibrahim Ilac Sanayi Ve Ticaret AS
Original Assignee
Abdi Ibrahim Ilac Sanayi Ve Ticaret AS
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 Abdi Ibrahim Ilac Sanayi Ve Ticaret AS filed Critical Abdi Ibrahim Ilac Sanayi Ve Ticaret AS
Publication of EP2475636A1 publication Critical patent/EP2475636A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/41—Preparation of salts of carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
    • C07C59/40—Unsaturated compounds
    • C07C59/76—Unsaturated compounds containing keto groups
    • C07C59/84—Unsaturated compounds containing keto groups containing six membered aromatic rings

Definitions

  • This invention relates to simple, economic and reliable methods to prepare Dexke- toprofen Trometamol polymorphs of Form A and Form B.
  • Ketoprofen is a well known member of non-steroidal anti-inflammatory drugs
  • Ketoprofen has an asymetric carbon in its chemical structure and it is commercially available as a racemic mixture in the drug market.
  • DKT Dexketoprofen trometamol
  • trometamol salt of S (+) enantiomer of Ketoprofen which has superior properties compared to ketoprofen in point of view of solubility and efficacy. It is used mainly as analgesic and marketed by Menarini under the Keral ® trademark as tablet and other dosage forms.
  • Polymorphism is a well known phenomen among pharmaceutical active compounds influencing properties such as solubility, stability, melting point among others and thus important .
  • EP1739072 discloses that dexketoprofen trometamol also shows polymorphism.
  • EP668851 patent points out a way of crystallization of dexketoprofen trometamol.
  • the reaction is carried out in a single solvent containing dexketoprofen and trometamol.
  • the reactants don't need to be completely soluble in the solvent .
  • DKT is insoluble in these solvent systems and dexketoprofen and /or trometamol are less soluble in these solvents. This type of reaction leads to less degradation since DKT is insoluble in the solvent system thus less prone to
  • Dexketoprofen and trometamol are dissolved in Ethanol / Ethylmethylketon mixture , Xylene is added onto it at elevated temperature to obtain a solution.
  • DKT precipitates at slower cooling rate as Form A and at faster cooling rate as Form B.
  • Form A is the thermodynamically stable form.
  • This procedure is not easier than the method of EP668851 patent since this method uses solvent mixtures as well and Xylene is not a prefered solvent of choice by crystallization due to its high boiling point.
  • This list can be expanded with other suitable solvents by holding on the spirit of the invention .
  • the scope of the invention should not be limited to these solvents.
  • Other suitable solvents especially from class of esters, ethers, ketone , halogenated organic solvents, aryl, alkyl hydrocarbons among others. Suitable solvent mixtures which do not dissolve DKT and less dissolve Dexketoprofen and Trometamol and lead to the desired polymorph may also be applied. But single solvents are more preferable.
  • Reaction temperatures from 0 0 C to reflux may be applied . Applying heat may diminish reaction times. But this is not preferred since this may lead to degradation and polymorphic changes.
  • Applied solvent amounts are typically around 10 times of reagent amounts. Less solvent may lead to increased reaction times .More solvent applied may lead to yield loss and expenditure.
  • Solvents that lead to form A by applying this method are: Methylisobutyl keton,
  • Solvents that lead to form B by applying this method are : n-Butyl acetate, Iso- propanol, n-propanol
  • Example 1 In a 250 ml three necked round bottomed glass flask equipped with glass rod and teflon paddle 1O g Dexketoprofen is weighed and dissolved in 30 ml Ethanol. 4.8 g Trometamol is dissolved in 16 ml water and added to Dexketoprofen solution. Resulting solution is evaporated to dryness . 20 ml of Ethanol is added to the residue to dissolve and again evaporated to dryness. The solid residue is dissolved in 16 ml Ethanol at 55 0 C . 40 ml Ethylacetate is added . The obtained solution is cooled. Around 25°C precipitation occured.
  • Polymorphic form is determined with PXRD ( See XRD Figure 3) ; 2 Theta : 4.66, 9.00, 12.54, 14.82, 17.12, 18.00, 20.30, 22.64, 27.30 and FT IR (See IR Figure 4) wavenumber (cm- 1) : 1630, 1554, 1426, 1354, 1083, 1043, 833

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Medicinal Preparation (AREA)

Abstract

La présente invention concerne des procédés simples, économiques et fiables pour préparer des polymorphes de dexkétoprofène trométamol de forme A et forme B.
EP09786483A 2009-06-30 2009-06-30 Procédé pour préparer des cristaux de forme a et forme b de dexkétoprofène trométamol Withdrawn EP2475636A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2009/052821 WO2011001213A1 (fr) 2009-06-30 2009-06-30 Procédé pour préparer des cristaux de forme a et forme b de dexkétoprofène trométamol

Publications (1)

Publication Number Publication Date
EP2475636A1 true EP2475636A1 (fr) 2012-07-18

Family

ID=41728307

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09786483A Withdrawn EP2475636A1 (fr) 2009-06-30 2009-06-30 Procédé pour préparer des cristaux de forme a et forme b de dexkétoprofène trométamol

Country Status (2)

Country Link
EP (1) EP2475636A1 (fr)
WO (1) WO2011001213A1 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2058024B1 (es) * 1992-11-10 1995-05-01 Menarini Lab Nuevo derivado arilpropionico, procedimiento de fabricacion del mismo y su utilizacion como analgesico.
EP1739072A1 (fr) * 2005-06-15 2007-01-03 Laboratorios Menarini S.A. Formes polymorphiques du dexketoprofene trometamol, ainsi que leurs préparations et compositions pharmaceutiques les comprenant

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2011001213A1 *

Also Published As

Publication number Publication date
WO2011001213A1 (fr) 2011-01-06

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