EP2132182A2 - Solution solide amorphe contenant un derive de pyrazole-3-carboxamide sous forme amorphe et des excipients stabilisateurs - Google Patents

Solution solide amorphe contenant un derive de pyrazole-3-carboxamide sous forme amorphe et des excipients stabilisateurs

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Publication number
EP2132182A2
EP2132182A2 EP08775573A EP08775573A EP2132182A2 EP 2132182 A2 EP2132182 A2 EP 2132182A2 EP 08775573 A EP08775573 A EP 08775573A EP 08775573 A EP08775573 A EP 08775573A EP 2132182 A2 EP2132182 A2 EP 2132182A2
Authority
EP
European Patent Office
Prior art keywords
amorphous
solid solution
amorphous solid
carboxamide
solution according
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Withdrawn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
EP08775573A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jean Alie
Michel Bauer
Jérôme MENEGOTTO
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.)
Sanofi SA
Original Assignee
Sanofi Aventis France
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 Sanofi Aventis France filed Critical Sanofi Aventis France
Publication of EP2132182A2 publication Critical patent/EP2132182A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
    • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
    • C07D401/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
    • C07D231/02—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
    • C07D231/10—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D231/14—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members 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 ring carbon atoms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
    • A61K31/415—1,2-Diazoles
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/04—Anorexiants; Antiobesity agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/06—Antihyperlipidemics

Definitions

  • the present invention relates to a pyrazole-3-carboxamide derivative in amorphous form, to an amorphous solid solution containing it, and more generally to pharmaceutical compositions containing it.
  • Amorphous form also means non-crystalline form.
  • the present invention also relates to processes for preparing said amorphous form, said amorphous solid solution and said pharmaceutical compositions.
  • derivative of pyrazole-3-carboxamide is meant a compound chosen from N-piperidino-5- (4-bromophenyl) -1- (2,4-dichlorophenyl) -4-ethylpyrazole-3-carboxamide and N-piperidino (5- (4-Chlorophenyl) -1- (2,4-dichlorophenyl) -4-methylpyrazole-3-i-carboxamide or a pharmaceutically acceptable salt thereof and / or solvates thereof.
  • these compounds are named as "active ingredients according to the invention”.
  • Carboxamide hereinafter referred to as Compound B, whose international nonproprietary name is rimonobant, is described in European Patent EP 656 354 B1.
  • the WO2006 / 021652 application relates to a method of preparation of o n rimonabant, Example 1 leads to a crystalline product. No mention of amorphous product is given in this application.
  • the rimonabant and surinabant compounds are CB1 receptor antagonists to cannabinoids.
  • a pharmaceutical composition containing compound B in admixture with Poloxamer 127 and a golglyceride macro is described in International Application WO 98/043 635.
  • a surfactant at a low concentration to avoid solubilization of said nanoparticles relate in particular to compound A and compound B.
  • Patent application WO 2006/087 732 describes an amorphous form of rimonabant hydrochloride.
  • amorphous solid solutions containing a pyrazole-3-carboxamide derivative according to the invention in amorphous form, which have the advantage of being physically stable over a long period of time under stressful conditions.
  • these amorphous solid solutions have the advantages of being easily manageable, easily implemented and easily administered to humans.
  • Other advantages relate to increasing the solubility of rimonabant and surinabant as well as improving the dissolution rate of rimonabant and surinabant.
  • Stressful conditions include, for example, a temperature greater than 20-
  • ° C such as 100 ° C and / or relative humidity (RH) greater than 50%.
  • RH relative humidity
  • ICH International Harmonization Committee
  • the present invention also relates to pharmaceutical compositions comprising the amorphous solid solution.
  • the amorphous solid solutions according to the present invention consist of a homogeneous amorphous mixture of the amorphous active ingredient and one or more excipients. amorphous, in which the amorphous structure of the active ingredient is physically stabilized by one or more stabilizing excipients.
  • the amorphous solid solutions according to the present invention are stable at room temperature.
  • amorphous active principle means that the active ingredient, that is to say the pyrazole-3-carboxamide derivative according to the invention, contained in the amorphous solid solution is in the amorphous state, that is to say that there is at least 80% of active ingredient in the amorphous state in the amorphous solid solution, preferably 90% and more preferably 95% of the active ingredient, or even 100% in the amorphous state.
  • amorphous active ingredient is also meant non-crystalline active ingredient.
  • the subject of the present invention is a pyrazole-3-carboxamide derivative according to the invention, in amorphous form. More particularly, the present invention relates firstly to the amorphous form of surinabant and secondly to the amorphous form of rimonabant.
  • the amorphous forms of surinabant and rimonabant as well as their salts and / or their solvates may in particular be prepared by the following processes: melt-quenching, lyophilization, grinding, spray drying (spray drying), roll drying (drying at drums or drum drying), addition of an anti-solvent (non-solvent) or by any other method making it possible to obtain the surinabant and the rimonabant as well as their salts and / or their solvates in the amorphous state.
  • a crystalline form of the pyrazole-3-carboxamide derivative is heated in a closed chamber, such as an oven at a temperature greater than 145 ° C.
  • the product is heated to a temperature of between 145 ° C. and 25 ° C., for example 180 ° C.
  • the amorphous form of rimonabant is characterized by a glass transition temperature between 65 ° C and 95 ° C; the amorphous form of surinabant is characterized by a glass transition temperature of between 60 ° C. and 90 ° C.
  • the amorphous form of rimonabant is characterized by a glass transition temperature of between 75 ° C. and 85 ° C.
  • the amorphous form of surinabant is characterized by a glass transition temperature of between 70 ° C. and 80 ° C.
  • the glass transition temperature may be lower than those indicated above for the 2 anhydrous compounds and without solvent. If the presence of structural relaxation, commonly known as physical aging, the glass transition temperature may be greater than those indicated above for the 2 anhydrous compounds and without solvent.
  • the glass transition temperature can be determined by different techniques.
  • the glass transition temperature is determined by differential scanning calorimetry (DSC).
  • DSC differential scanning calorimetry
  • the glass transition temperature is defined by the midpoint of the heat capacity jump.
  • the glass transition temperature may vary.
  • Other techniques are, for example, dynamic dielectric spectroscopy (SDD) ⁇ Q and dynamic mechanical analysis (DMA)
  • rimonabant Another characteristic of the amorphous form of rimonabant is its X-ray diffractogram showing the presence of a halo and the absence of diffraction peaks, characteristics indicating the absence of crystalline phase. These characteristics for amorphous rimonabant are demonstrated on the diffractogram j 5 of Figure 14.
  • amorphous form of surinabant is its X-ray diffractogram showing the presence of a halo and the absence of diffraction peaks, characteristics indicating the absence of crystalline phase. These characteristics for amorphous surinabant are demonstrated on the diffractogram
  • amorphous form of rimonabant Another characteristic of the amorphous form of rimonabant is the presence of a heat capacity jump recorded by ACD. This characteristic for amorphous rimonabant is shown in Figure 13.
  • solid solution is meant a solid system consisting of a single phase and comprising at least two different chemical compounds in which a compound is dispersed at the molecular level in at least a second compound.
  • amorphous solid solution corresponds to a solid solution comprising the amorphous active ingredient and one or more stabilizing excipients themselves in amorphous form in the amorphous formulation.
  • the present invention also relates to an amorphous solid solution of a pyrazole-3-carboxamide derivative according to the invention in amorphous form with one or more stabilizing excipients. More particularly, the present invention relates to an amorphous solid solution comprising rimonabant and / or one of its salts and / or solvates in amorphous form with one or more stabilizing excipients themselves in amorphous form. More particularly, the present invention relates to an amorphous solid solution comprising surinabant and / or one of its salts and / or solvates in amorphous form with one or more stabilizing excipients themselves in amorphous form.
  • stabilizing excipient means any miscible excipient on the scale. with the amorphous active ingredient in the amorphous solid solution according to the invention.
  • the stabilizing excipients are low molecular weight molecules, polymers or a mixture thereof.
  • stabilizing excipients chosen from pharmaceutically acceptable acids, polyols or a polymeric excipient chosen from:
  • the present invention relates to an amorphous solid solution containing one or more stabilizing excipients as listed above, for example:
  • polymer excipient s
  • polyol s
  • the total number of moles of excipient (s) stabilizer (s) is at least equal to the number of moles of amorphous active ingredient.
  • the amount of amorphous active ingredient in the amorphous solid solution according to the present invention is such that the number of units (monomers) of the polymer stabilizing excipient is at least equal to the number of molecules of amorphous active ingredient.
  • the stabilizing excipient (s) is a pharmaceutically acceptable acid comprising one or more acid functions, it is the total number of acid functions which is preferably at least equal to the number of moles of active principle. amorphous.
  • methacrylate copolymers cationic copolymers of dimethylaminoethyl methacrylates and neutral methacrylic esters and anionic copolymers of methacrylic acid and methacrylic acid esters such as, for example, methacrylic acid / methyl methacrylate copolymer (1: 1). Methacrylic acid / methyl methacrylate copolymer (1: 2), methacrylic acid / ethyl acrylate copolymer (1: 1), basic butyl methacrylate copolymer. These copolymers are described in US Pharmacopoeia NF21 and in the Pharmacopoeia
  • Vinyl homopolymers and copolymers are understood to mean the polymers of N-vinylpyrrolidone, in particular povidone, copovidone and polyvinyl alcohol.
  • polydextrose polydextrose with a molecular weight of at most
  • polydextrose that can be used in the composition according to the invention
  • the family of polydextroses marketed by Danisco under the name “Litesse ® ", such as “Litesse ® II”, and more particularly the "Litesse ® Ultra TM" of average molecular weight between
  • Cellulosic polymers are understood to mean alkylcelluloses, in particular methylcellulose, hydroxyalkylcelluloses, especially hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxybutylcellulose and low-substituted hydroxypropylcellulose, hydroxyalkylalkylcelluloses, in particular hydroxyethylmethylcellulose and hydroxypropylmethylcellulose, carboxyalkylcelluloses.
  • chemically modified starches is meant derived starches, starches extracted from corn, potato, rice, wheat or tapioca.
  • chitin By derivatives of chitin is meant, for example, chitosan.
  • polymers of natural origin is meant gum tragacanth, gelatin, sodium alginate, pullulan, gum arabic, guar gum, agar-agar and xanthan gum.
  • Polyakylene oxides are polyethylene oxides, polypropylene oxides and copolymers of ethylene oxide and propylene oxide. 5
  • Polyethylene glycols are preferably those having a molecular weight greater than 1500.
  • polyols is preferably meant sorbitol, xylitol, manitol, erythritol and polyethylene glycols.
  • pharmaceutically acceptable acids can be used which have one or more acidic functions such as hydrochloric acid, sulfuric acid, thiocyanic acid, L-aspartic acid, maleic acid, phosphoric acid, glutamic acid, (+) - L-tartaric acid, fumaric acid, galactaric acid, citric acid, D-glucuronic acid, glucoheptonic acid, (-) - L malic acid, hippuric acid, D-gluconic acid, (+) - L-lactic acid, (+ -) - DL lactic acid, ascorbic acid, succinic acid, glutaric acid, adipic acid, sebaric acid, acetic acid, capric acid, lauric acid, palmitic acid and stearic acid.
  • the preferred acids are citric acid and fum
  • the stabilizing excipients according to the invention are polymers which have a glass transition temperature greater than 75 ° C.
  • the following polymers are preferred:
  • copovidone that is to say the so-called PVPVA copolymer, namely the copolymer of N-vinyl pyrrolidone and vinyl acetate, and more specifically poly (N-vinyl pyrrolidone) 60% -vinyl acetate 40% as sold under the name Kollidon VA 64® by the company BASF,
  • acrylic and methacrylic polymers such as, for example, the basic butyl methacrylate copolymer, the methacrylic acid / methyl methacrylate (1: 1) copolymer, the methacrylic acid / ethyl acrylate (1: 1) copolymer, the methacrylic acid / methyl copolymer, methacrylate (1: 2) marketed by Rohm under the name Eudragit ® , namely Eudragit ® E 100, Eudragit ® L 100, Eudragit ® L 100-55 and Eudragit ® S100 respectively; the methacrylic acid / methyl methacrylate (1: 1) (Eudragit ® L 100) and methacrylic acid-ethylacrylate copolymer (1: 1) (Eudragit® L 100-55) is preferred.
  • a first variant is distinguished in which the pyrazole-3-carboxamide derivative is dissolved in at least one solvent and a second variant in which the pyrazole-3-carboxamide derivative is not dissolved in a solvent.
  • the process for preparing the amorphous solid solution of the invention is characterized in that: a) the pyrazole-3-carboxamide derivative according to the invention is dissolved in amorphous form or in crystalline form and stabilizing excipient in a suitable solvent to form a liquid solution, b) removing the solvent.
  • the amorphous solid solution thus obtained is in powder form.
  • suitable solvent is meant a solvent or a mixture of several solvents in which the active ingredient and the stabilizing excipient are soluble, that is to say that they have a solubility greater than 1 mg / ml.
  • a mixture of solvents is preferred if the active ingredient and the stabilizing excipient require different solvents to achieve the desired solubility.
  • suitable solvents include dioxane, dichloromethane, acetone, ethanol, water, and mixtures thereof.
  • the preferred solvent is a mixture of water and ethanol.
  • step a of the process is desolvated in step b by a
  • Process such as lyophilization, spray drying (spray drying), roll drying (drum drying), or addition of a non-solvent (anti-solvent).
  • Desolvation by cylinder drying is preferred and the solution obtained in the first step is said solution to dry on rolls.
  • the amorphous solid solution of the invention can be any suitable solid solution of the invention.
  • JQ prepared according to a process characterized in that the mixture of pyrazole-3-carboxamide derivative in crystalline or amorphous form and the stabilizing excipient or excipients, is treated either by melting and rapid cooling (melt-quenching method), or by injection molding, or by extrusion, or by any other method known to those skilled in the art.
  • the amorphous solid solution of the invention may be prepared alternatively by another process characterized in that the pyrazole-3-carboxamide derivative in crystalline or amorphous form and the stabilizing excipient (s) are crushed. together ; this latter process is called co-grinding.
  • the solid solution thus obtained by one of the processes according to the invention can be milled so as to obtain a fine powder (particle size ⁇ 300 ⁇ m).
  • the amorphous solid solution according to the invention constitutes a homogeneous phase which can itself be associated with other excipients, without these constituents modifying the physical structure of the amorphous solid solution. This is why the present invention also relates to pharmaceutical compositions containing the amorphous solid solution according to the invention, in particular the pharmaceutical compositions for oral administration.
  • one or more pharmaceutically acceptable excipients can be combined with the amorphous solid solution powder to form a pharmaceutical composition for oral administration.
  • Such pharmaceutically acceptable excipients may include one or more diluents such as microcrystalline cellulose, lactose, mannitol, pregelatinized starch and the like; one or more disintegrants, for example starch glycolate sodium, crospovidone, croscarmelose sodium and equivalents; one or more lubricants such as, for example, magnesium stearate, sodium stearyl fumarate and the like; one or more sweeteners, for example sucrose, saccharin and equivalents; one or more flavoring agents such as mint, methyl salicylate, orange flavoring, lemon flavoring and the like; one or more dyes; conservatives; one or more buffers; and / or any other excipients depending on the dosage form used.
  • diluents such as microcrystalline cellulose, lactose, mannitol, pregelatinized starch
  • compositions of the present invention preferably contain a therapeutically effective amount of the active ingredient according to the invention.
  • the pharmaceutical compositions of the present invention may be administered, preferably orally, to patients, including but not limited to mammals such as humans, for example in the form of hard or soft gelatin capsules, tablets, pills, granules or suspension.
  • compositions of the present invention may be administered in combination with other therapeutic agents and / or prophylactic agents and / or drugs that are not medically incompatible with each other.
  • the present invention is particularly related to an amorphous pharmaceutical composition in solid form for the oral administration of an amorphous pyrazole-3-carboxamide derivative selected from: N-piperidino-5- (4-bromophenyl) 1- (2,4-dichlorophenyl) -4-ethylpyrazole-3-carboxamide and N-piperidino-5- (4-chlorophenyl) -1- (2,4-dichlorophenyl) -4-methylpyrazole-3-carboxamide of one of their salts and / or solvates, wherein said amorphous pyrazole-3-carboxamide derivative is physically stabilized by one or more stabilizing excipients.
  • an amorphous pyrazole-3-carboxamide derivative selected from: N-piperidino-5- (4-bromophenyl) 1- (2,4-dichlorophenyl) -4-ethylpyrazole-3-carboxamide and N-piperidino-5- (4-chlor
  • Amorphous solid solutions and amorphous pyrazole-3-carboxamide derivatives according to the present invention can be characterized by:
  • Dynamic dielectric spectroscopy is used according to J. Menegotto et al., Chapter 7 in “Solid State Characterization of Pharmaceuticals", edited by Angeline and Marek Zakrzewski, Pergamon, 2006. 5
  • the samples before being analyzed are placed between two electrodes forming a capacitor whose material constitutes the dielectric.
  • the general principle of Dielectric spectroscopies rely on the determination of the complex impedance Z of the capacitor. From this physical quantity, the complex permittivity ⁇ * is determined according to the relation:
  • Determination of the relaxation time for a given temperature is performed using the Hoviciak-Negami equation.
  • the apparatus used is a dielectric spectrometer BDS 4000 ® sold by Novocontrol whose sensitivity is of the order of 10 "4 tan ⁇ .
  • the frequency range available ⁇ is between 10" 2 Hz to 10 9 Hz.
  • the control the temperature between -
  • 160 0 C and 300 ° C is provided by the system Four of Novocontrol ® .
  • the apparatus used is a Siemens ® DT 500 diffractometer of the Bragg-Brentano type.
  • the line used is K a1 copper obtained at an accelerating voltage of 30mA-40kV.
  • the diffractograms are recorded for angles between 2 ° and 40 ° at the speed of 1 min -1 in 2 theta of Bragg.
  • DSC Differential Calorimetric Analysis
  • the apparatus used is the 2920 supplied by TA Instruments or the Pyris supplied by Perkin Elmer, using non-hermetic capsules.
  • the thermograms are recorded at a rate of 10 ° C./min under a dry nitrogen atmosphere at a flow rate of 50 ml / min.
  • FIGS. 1 to 18 show a number of characteristics of the amorphous solid solutions according to the invention and a certain number of characteristics of the amorphous pyrazole-3-carboxamide derivatives according to the invention.
  • Figure 1 shows the diffractogram RX of the solid solution prepared in Example 1.
  • FIG. 2 represents the temperature dependence of the relaxation times, associated with the dynamic vitreous transition of surinabant, of the stabilizing excipient and of the solid solution formed in example 1.
  • Figure 3 shows the X-ray diffractogram of the solid solution prepared in Example 1 after 52 days at 100 ° C.
  • FIG. 4 represents the X-ray diffractogram of the solid solution prepared in Example 2.
  • FIG. 5 represents the temperature dependence of the relaxation times associated with the dynamic vitreous transition of surinabant, the stabilizing excipient and the solid solution formed in example 2.
  • FIG. 6 represents the diffractogram RX of the solid solution prepared in Example 2 after 52 days at 100 ° C.
  • FIG. 7 represents the X-ray diffractogram of the solid solution prepared in Example 3.
  • FIG. 8 represents the temperature dependence of the relaxation times, associated with the dynamic vitreous transition of surinabant, of the stabilizing excipient and of the solid solution formed in example 3.
  • Figure 9 shows the X-ray diffractogram of the solid solution prepared in Example 6.
  • FIG. 10 represents the temperature dependence of the relaxation times associated with the dynamic vitreous transition of surinabant, the stabilizing excipient and the solid solution formed in Example 6.
  • FIG. 12 represents the temperature dependence of the relaxation times, associated with the dynamic glass transition of rimonabant, the stabilizing excipient 15 and the solid solution formed in Example 8.
  • Figure 13 shows the thermogram of the amorphous rimonabant prepared in Example 9.
  • Figure 14 shows the RX diffractogram of amorphous rimonabant prepared in Example 9.
  • FIG. 15 represents the relaxation time of the modes associated with the dynamic glass transition and the intramolecular movements of the rimonabant prepared in Example 9.
  • FIG. 16 represents the thermogram of the amorphous surinabant prepared in Example 10.
  • FIG. 17 represents the RX diffractogram of the amorphous rimonabant prepared in Example 10.
  • FIG. 18 represents the relaxation time of the modes associated with the dynamic vitreous transition and the intramolecular movements of the surinabant prepared in Example 10.
  • FIG. 19 represents the thermogram of the amorphous solid solution of surinabant and PVPPVA (70% / 30% by mass) prepared in Example 7. 5
  • Example 1 Preparation of a solid solution of 50% by mass of surinabant and 50% by mass of Eudragit ® L 100 by the method of drying on rolls.
  • the preparation of the cylinder-drying solution begins with the dissolution of the surinabant in the Acetone-Water mixture with stirring and heating at 40 ° C to avoid reprecipitation. The excipient is then added, still stirring and heating. The solution is immediately warmed using a drum dryer (cylinder drying).
  • composition of the solution to be dried on rolls is given in Table 1.
  • the oven drying of the wet product recovered at the roll drying outlet is at 60 ° C. under 4 mbar for 24 hours.
  • the powder thus obtained is analyzed.
  • Example 1 The recorded powder X-ray diffractogram is reported in FIG. 1.
  • the solid solution of Example 1 is amorphous as shown by the absence of diffraction peaks. This means that the 2 components present in the amorphous solid solution are amorphous.
  • the amorphous nature of the solid solution of powder obtained is verified by SDD.
  • the dielectric properties of the solid solution of Example 1 are recorded as a function of the frequency (between 10 1 Hz and 10 6 Hz) in a range of temperatures centered around the glass transition temperatures of the various compounds.
  • the evolution of the tan ⁇ parameter as a function of temperature and frequency reveals the presence of a single mode of relaxation in the region of the glass transition.
  • FIG. 2 represents the temperature dependence of the relaxation times associated with the dynamic vitreous transition of the surinabant, the stabilizing excipient and the solid solution formed by the mixture of the two compounds.
  • Example 1 The relaxation times associated with the solid solution of Example 1 are situated between those of the compound and those of the excipient. This shows that the system is homogeneous: the two compounds form an amorphous solid solution.
  • the physicochemical stability of the solid solution of powder obtained is determined at 100 ° C. without a controlled atmosphere for 52 days. Several samples are placed in an oven controlled at a temperature of 100 ° C. and analyzed at different times by X-ray powder diffractometry.
  • the X-ray diffractogram of FIG. 3 shows that the solid solution of example 1 is still amorphous after 52 days of stressing conditions at 100 ° C. whereas under the same conditions the amorphous active ingredient becomes totally crystalline in only 24 hours.
  • Example 2 Preparation of a solid solution of 50% by mass of surinabant, and 50 wt% of Eudragit Ll 00-55 ® by the method of drying cylinders. Preparation
  • the preparation of the solution to be dried on rollers begins with the dissolution of surinabant in the Acetone-Water mixture with stirring and heating at 40 ° C. in order to avoid reprecipitation.
  • the excipient is then added still with stirring and heating, the solution is immediately dried on cylinders, hot using a drum dryer Duprat F50100.
  • the X-ray diffractogram of the solid solution of powder obtained is shown in FIG. 4.
  • the solid solution of Example 2 is amorphous, as shown by the absence of diffraction peaks. This means that the 2 components present in the amorphous solid solution are amorphous.
  • FIG. 5 represents the temperature dependence of the relaxation times, associated with the dynamic glass transition of the compound, the excipient and the solid solution formed by the mixture of the two compounds.
  • Example 2 The relaxation times associated with the solid solution of Example 2 are situated between those of the compound and those of the excipient. This shows that the system is homogeneous: the two compounds form an amorphous solid solution.
  • Example 2 The physico-chemical stability of the solid solution of Example 2 is determined at 100 ° C. without a controlled atmosphere for 28 days. Several samples are placed in an oven regulated at a temperature of 100 ° C. and analyzed at different times by X-ray powder diffractometry.
  • the diffractogram RX of Figure 6 shows that the solid solution of Example 2 is still amorphous after 28 days of stressing conditions at 100 ° C while under the same conditions the amorphous active ingredient becomes fully crystalline in only 24 hours.
  • Example 3 Solid Surinabant Solution and Eudragit® L100-55 Prepared by Injection-Molding and Extrusion.
  • a physical mixture comprising 50% by weight of Eudragit® LlOO-
  • the physical mixture is carried out at ambient temperature (approximately 25 ° C.) using a Turbula ® mixer for 30 minutes to obtain a homogeneous physical mixture.
  • An injection molding machine, model Sprinter "11 from Erinca, is fed
  • the mold used is such as to obtain a molded tablet of size and shape substantially identical to those of a capsule of size 0.
  • Example 3 The solid solution of Example 3 is amorphous as shown by the absence of diffraction peaks. This means that the 2 components present in the amorphous solid solution are amorphous.
  • FIG. 8 represents the temperature dependence of the relaxation times, associated with the dynamic glass transition of the compound, of the excipient and of the solid solution formed by the mixture of the two compounds.
  • the relaxation times associated with the solid solution of Example 3 are situated between those of the compound and those of the excipient. This shows that the system is homogeneous: the two compounds form an amorphous solid solution.
  • Example 4 Preparation of a solid solution of 50% by weight of surinabant, and 50% by mass of Eudragit ® LlOO by the melt-quenching method.
  • the container is immersed in liquid nitrogen.
  • the film formed at the bottom of the container is slightly crushed in a mortar.
  • the powder obtained constitutes the amorphous solid solution.
  • Example 5 Preparation of a solid solution of 50% by mass of surinabant, and 50 wt% of Eudragit Ll 00-55 ® by the method of melt-quenching 15.
  • Example 6 Preparation of a solid solution of 80% by weight of ryc surinabant, and 20% by weight of citric acid by the melt-quenching method.
  • the film formed at the bottom of the container is slightly crushed in a mortar.
  • the powder obtained constitutes the amorphous solid solution.
  • the powder thus obtained is analyzed.
  • the X-ray diffractogram of the obtained powder is recorded and reported in FIG. 9.
  • the solid solution of the powder of Example 6 is amorphous as shown in FIG. the absence of diffraction peaks. This means that the 2 components present in the amorphous solid solution are amorphous.
  • Differential calorimetric analysis reveals a characteristic glass transition of between 40 and 70 ° C., and more precisely of the order of 56 ° C.
  • the amorphous solid solution character of the powder is verified by SDD.
  • FIG. 10 represents the temperature dependence of the relaxation times, associated with the dynamic glass transition of the compound, the excipient and the solid solution formed by the mixture of the two compounds.
  • Example 6 The relaxation times associated with the solid solution of Example 6 are situated between those of the compound and those of the excipient. This shows that the system is homogeneous: the two compounds form an amorphous solid solution.
  • Example 7 Preparation of a solid solution of 70% by mass of surinabant, and 30% by mass of PVPVA by the method of fusion-quenching.
  • the container is immersed in liquid nitrogen.
  • the film formed at the bottom of the container is slightly crushed in a mortar.
  • the powder obtained constitutes the amorphous solid solution.
  • the powder thus obtained is analyzed.
  • FIG. 11 represents the temperature dependence of the relaxation times, associated with the dynamic glass transition of the compound, the excipient and the solid solution formed by the mixture of the two compounds.
  • Example 7 The relaxation times associated with the solid solution of Example 7 are situated between those of the compound and those of the excipient. This shows that the system is homogeneous: the two compounds form an amorphous solid solution.
  • Example 8 Preparation of a solid solution of 50% by weight of rimonabant and 50% by mass of Eudragit ® L100 by the method of fusion-quenching.
  • Preparation 200 mg of rimonabant and 200 mg of Eudragit ® L100 are mixed in a mortar and slightly crushed. This powder is deposited in an airtight container and placed in an oven at 180 ° C. for 10 minutes. Then, the container is immersed in liquid nitrogen. The film formed at the bottom of the container is slightly crushed in a mortar. The powder obtained constitutes the amorphous solid solution. The powder thus obtained is analyzed.
  • the amorphous solid solution character of the powder is verified by SDD.
  • FIG. 12 represents the temperature dependence of the relaxation times, associated with the dynamic glass transition of the compound, the excipient and the solid solution formed by the mixture of the two compounds.
  • Example 8 The relaxation times associated with the solid solution of Example 8 are situated between those of the compound and those of the excipient. This shows that the system is homogeneous: the two compounds form an amorphous solid solution.
  • rimonabant About 1 g of rimonabant is placed in an airtight container and placed in an oven at 180 ° C. for 10 minutes. Then the container is immersed in liquid nitrogen. The film formed at the bottom of the container is then slightly ground in a mortar. The powder obtained constitutes amorphous rimonabant.
  • the powder thus obtained is analyzed.
  • Differential calorimetric analysis reveals a characteristic glass transition of amorphous rimonabant between 75 ° C. and 95 ° C., and more precisely of the order of 81 ° C. according to FIG. 13.
  • the X-ray diffractogram of the recorded powder is shown in FIG. 14.
  • the rimonabant of Example 10 is amorphous as shown by the absence of diffraction peaks.
  • the dielectric properties of the powder obtained are recorded as a function of the frequency (between 10 -1 Hz and 10 6 Hz) in a temperature range 1
  • the first at low temperatures (noted P 1 ) is associated with intramolecular movements.
  • the temperature dependence of the P 1 c mode relaxation times is reported in FIG. 15. This temperature dependence is of the Arrhenius type and has an activation energy of the order of 42 kJ mol -1 .
  • the second in the high temperature domain (Oc 1 ) is associated with the glass transition of amorphous rimonabant.
  • the temperature dependence of the relaxation times of the Oc 1 mode is shown in FIG. 15. This temperature dependence is of the VTF (Vogel-Tamman-Fulcher) type.
  • Example 10 Amorphous form of surinabant prepared by melting-quenching.
  • the powder thus obtained is analyzed.
  • Differential calorimetric analysis shows a glass transition characteristic of amorphous surinabant between 70 0 C and 90 0 C, and more precisely of the order of 77 0 C according to Figure 16.
  • the X-ray diffractogram of the recorded powder is shown in Figure 17.
  • the surinabant of Example 10 is amorphous as shown by the absence of diffraction peaks.
  • the dielectric properties of the amorphous powder of surinabant are recorded as a function of the frequency (between 10 " Hz and 10 9 Hz) in a temperature range between -160 ° C. and 200 ° C.
  • the evolution of the tan ⁇ parameter in 0 function of temperature and frequency reveals the presence of two modes of relaxation.
  • the first at low temperatures (noted ⁇ 2 ) is associated with intramolecular movements.
  • the temperature dependence of the relaxation times of the ⁇ 2 mode is reported in FIG. 18.
  • This temperature dependence is of the Arrhenius type and has an activation energy of the order of 53 kJ.mol -1 .
  • the second in the high temperature domain (Ot 1 ) is associated with the glass transition of amorphous surinabant.
  • the temperature dependence of the relaxation times of the mode Ot 1 is reported in FIG. 18. This temperature dependence and VTF type.
  • Example 10 Tests are carried out with the amorphous surinabant obtained in Example 10 and the surinabant in its crystalline form.
  • the test conditions are identical to those of the comparative tests carried out for the surinabant (see paragraph A above).

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EP08775573A 2007-02-23 2008-02-20 Solution solide amorphe contenant un derive de pyrazole-3-carboxamide sous forme amorphe et des excipients stabilisateurs Withdrawn EP2132182A2 (fr)

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FR0701377A FR2913018A1 (fr) 2007-02-23 2007-02-23 Solution solide amorphe contenant un derive de pyrazole-3-carboxamide sous forme amorphe et des excipients stabilisateurs
PCT/FR2008/000216 WO2008129157A2 (fr) 2007-02-23 2008-02-20 Solution solide amorphe contenant un derive de pyrazole-3-carboxamide sous forme amorphe et des excipients stabilisateurs

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FR2713225B1 (fr) * 1993-12-02 1996-03-01 Sanofi Sa N-pipéridino-3-pyrazolecarboxamide substitué.
FR2761266B1 (fr) * 1997-03-28 1999-07-02 Sanofi Sa Composition pharmaceutique formee par granulation humide pour l'administration orale d'un derive du n-piperidino-3- pyrazolecarboxamide, de ses sels et de leurs solvates
FR2789079B3 (fr) * 1999-02-01 2001-03-02 Sanofi Synthelabo Derive d'acide pyrazolecarboxylique, sa preparation, les compositions pharmaceutiques en contenant
GB0216700D0 (en) * 2002-07-18 2002-08-28 Astrazeneca Ab Process
FR2873372B1 (fr) * 2004-07-22 2006-09-08 Sanofi Synthelabo Procede de preparation de derives n-piperidino-1,5- diphenylpyrazole-3-carboxamide
EP1844017A1 (en) * 2005-01-06 2007-10-17 Cadila Healthcare Ltd. An amorphous and three crystalline forms of rimonabant hydrochloride
AR052660A1 (es) * 2005-01-21 2007-03-28 Astex Therapeutics Ltd Derivados de pirazol para inhibir la cdk's y gsk's
KR100678824B1 (ko) * 2005-02-04 2007-02-05 한미약품 주식회사 용해성이 증가된 무정형 타크로리무스 고체분산체 및 이를포함하는 약제학적 조성물
DE102005026755A1 (de) * 2005-06-09 2006-12-14 Basf Ag Herstellung von festen Lösungen schwerlöslicher Wirkstoffe durch Kurzzeitüberhitzung und schnelle Trocknung
EP1816125A1 (en) * 2006-02-02 2007-08-08 Ranbaxy Laboratories, Ltd. Novel crystalline forms of an antagonist of CB1 cannabinoid receptor and preparation method thereof
WO2007103711A2 (en) * 2006-03-01 2007-09-13 Dr. Reddy's Laboratories Ltd. Polymorphic forms of rimonabant
US8431609B2 (en) * 2007-02-19 2013-04-30 Darmesh Mahendrabhai Shah Process for preparation of pyrazole derivatives

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MA31244B1 (fr) 2010-03-01
TW200846339A (en) 2008-12-01
IL200370A0 (en) 2010-04-29
JP2010519246A (ja) 2010-06-03
WO2008129157A2 (fr) 2008-10-30
AU2008240507A1 (en) 2008-10-30
AR065410A1 (es) 2009-06-03
PE20081778A1 (es) 2009-01-01
FR2913018A1 (fr) 2008-08-29
CA2678801A1 (fr) 2008-10-30
CN101641333A (zh) 2010-02-03
UY30937A1 (es) 2008-09-30
EA200970792A1 (ru) 2010-04-30
CO6210812A2 (es) 2010-10-20
MX2009008991A (es) 2009-09-03
KR20090113305A (ko) 2009-10-29
CL2008000550A1 (es) 2008-07-04
US20100076023A1 (en) 2010-03-25
WO2008129157A3 (fr) 2008-12-31
WO2008129157A4 (fr) 2009-03-05

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