NZ548864A - New cyrstalline form V of agomelatine, a process for its preparation and pharmaceutical compositions containing it - Google Patents

New cyrstalline form V of agomelatine, a process for its preparation and pharmaceutical compositions containing it

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Publication number
NZ548864A
NZ548864A NZ548864A NZ54886406A NZ548864A NZ 548864 A NZ548864 A NZ 548864A NZ 548864 A NZ548864 A NZ 548864A NZ 54886406 A NZ54886406 A NZ 54886406A NZ 548864 A NZ548864 A NZ 548864A
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New Zealand
Prior art keywords
agomelatine
disorders
crystalline form
insomnia
disease
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Application number
NZ548864A
Inventor
Gerard Coquerel
Julie Linol
Jean-Claude Souvie
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Servier Lab
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Application filed by Servier Lab filed Critical Servier Lab
Publication of NZ548864A publication Critical patent/NZ548864A/en

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    • C07C233/01Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
    • C07C233/16Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by singly-bound oxygen atoms
    • C07C233/17Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by singly-bound oxygen atoms with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by an acyclic carbon atom
    • C07C233/18Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by singly-bound oxygen atoms with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by an acyclic carbon atom having the carbon atom of the carboxamide group bound to a hydrogen atom or to a carbon atom of an acyclic saturated carbon skeleton
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    • C07C2602/00Systems containing two condensed rings
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    • C07C2602/04One of the condensed rings being a six-membered aromatic ring
    • C07C2602/10One of the condensed rings being a six-membered aromatic ring the other ring being six-membered, e.g. tetraline

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Abstract

Crystalline form V of agomelatine (N-[2-(7-methoxy-1-naphthyl)ethyl]acetamide) is disclosed, wherein the crystalline form V of agomelatine has powder X-ray diffraction diagram, measured using a diffractometer (copper anticathode) and expressed in terms of inter-planar distance d (8.979-3.239 A[deg]), Bragg's angle 2 theta (9.84-27.51 degrees), intensity and relative intensity (expressed as a percentage with respect to the most intense ray). A process for the preparation of the crystalline form V of agomelatine is disclosed, wherein agomelatine is subjected to high energy mechanical grinding. Another process for the preparation of the crystalline form V of agomelatine is also disclosed, wherein agomelatine is heated until completely melted, then immediately placed at room temperature and simultaneously a small quantity of crystalline form V of agomelatine freshly prepared is added, and the mixture is cooled until crystallisation is complete. A pharmaceutical composition comprising as active ingredient an effective amount of crystalline form V of agomelatine is suitable for treating sleep disorders, stress, anxiety, seasonal affective disorders or severe depression, cardiovascular pathologies, pathologies of the digestive system, insomnia and fatigue due to jetlag, schizophrenia, panic attacks, melancholia, appetite disorders, obesity, insomnia, psychotic disorders, epilepsy, diabetes, Parkinson's disease, senile dementia, various disorders associated with normal or pathological ageing, migraine, memory loss, Alzheimer's disease, cerebral circulation disorders, and also in sexual dysfunction, as ovulation inhibitors, immunomodulators and cancers.

Description

New Zealand Paient Spedficaiion for Paient Number 548864 *10052303729* 4 8 8 6 A INTELLECTUAL PROPERTY OFFICE OF N.Z. -1 AUG 2006 RECEIVED NEW ZEALAND PATENTS ACT, 1953 No: Date: COMPLETE SPECIFICATION NEW CRYSTALLINE FORM V OF AGOMELATINE, A PROCESS FOR ITS PREPARATION AND PHARMACEUTICAL COMPOSITIONS CONTAINING IT We, LES LABORATOIRES SERVIER, a French body corporate of 12, place de La Defense, 92415 Courbevoie Cedex, France, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: (followed by page la) - 1 a- The present invention relates to a new crystalline form V of agomelatine, or jV-[2-(7-methoxy-l-naphthyl)ethyl]acetamide, of formula (I): NHCOMe MeO-^ (I) a process for its preparation and pharmaceutical compositions containing it.
Agomelatine, or iV-[2-(7-methoxy-l-naphthyl)ethyl]acetamide, has valuable pharmacological properties.
Indeed it has the double feature of being, on the one hand, an agonist of melatoninergic system receptors and, on the other hand, an antagonist of the 5-HT2C receptor. Those properties confer activity in the central nervous system and, more especially, in the treatment of severe depression, seasonal affective disorders, sleep disorders, cardiovascular pathologies, pathologies of the digestive system, insomnia and fatigue resulting from jetlag, appetite disorders and obesity.
Agomelatine, its preparation and its therapeutic use have been described in European Patent Specification EP 0 447 285.
In view of the pharmaceutical value of this compound, it has been important to be able to obtain it with excellent purity, with well defined crystalline form, perfectly reproducible, which as a result exhibits valuable characteristics in terms of dissolution and formulation and sufficiently stable to allow its storage for long periods without particular requirements for temperature, light, humidity or oxygen level.
Patent Specification EP 0 447 285 describes the preparation of agomelatine in eight steps, starting from 7-methoxy-l-tetralone. However, that document does not specify the conditions for obtaining agomelatine in a form that exhibits those characteristics in a reproducible manner.
The Applicant has now developed a new synthesis process that allows agomelatine to be obtained in a well defined, perfectly reproducible crystalline form that especially exhibits valuable characteristics for dissolution and formulation.
More specifically, the present invention relates to the crystalline form V of the compound 5 of formula (I), characterised by the following powder X-ray diffraction diagram, measured using a Siemens D5005 diffractometer (copper anticathode) and expressed in terms of inter-planar distance d, Bragg's angle 2 theta, intensity and relative intensity (expressed as a percentage of the most intense ray) : 2-Theta (°) d(A) Intensity exp. exp. (%) 9.84 8.979 17 12.40 7.134 13.31 6.646 19 .14 .848 18 .98 .543 18 16.62 .329 19 17.95 4.939 100 18.88 4.697 65 .49 4.332 24 .99 4.228 34 23.07 3.852 39 23.44 3.792 36 24.28 3.663 58 .10 3.545 19 26.02 3.422 26.82 3.322 19 27.51 3.239 16 The invention relates also to a process for the preparation of the crystalline form V of the compound of formula (I), which process is characterised in that agomelatine is subjected to a mechanical grinding which is said to be "of high energy".
In the crystallisation process according to the invention it is possible to use the compound of formula (I) obtained by any process.
INTELLECTUAL PROPERTY OFFICE OF N.Z.
G S JUL 2007 p F d EIV E D The invention relates also to another process for the preparation of the crystalline form V of the compound of formula (I), which process is characterised in that agomelatine is heated until complete melting, then immediately put at room temperature and simultaneously a small quantity of crystalline form V of compound of formula (I) freshly 5 prepared is added, and the mixture is cooled until crystallisation is complete.
Preferably, in that second crystallisation process according to the invention, agomelatine will be melted at 110°C.
The amount of crystalline form V added in that second process according to the invention will be preferably contained between 1/100 and 1/50 of agomelatine weight.
In that second crystallisation process according to the invention, it is possible to use the compound of formula (I) obtained by any process.
An advantage of obtaining that crystalline form is that it allows the preparation of pharmaceutical formulations having a consistent and reproducible composition, which as a result exhibits valuable characteristics in terms of dissolution which is especially 15 advantageous when the formulations are to be used for oral administration.
A pharmacological study of the form V so obtained has demonstrated that it has substantial activity in respect of the central nervous system and in respect of microcirculation, enabling it to be established that the crystalline form V of agomelatine is useful in the treatment of stress, sleep disorders, anxiety, severe depression, seasonal affective 20 disorders, cardiovascular pathologies, pathologies of the digestive system, insomnia and fatigue due to jetlag, schizophrenia, panic attacks, melancholia, appetite disorders, obesity, insomnia, pain, psychotic disorders, epilepsy, diabetes, Parkinson's disease, senile dementia, various disorders associated with normal or pathological ageing, migraine, memory loss, Alzheimer's disease, and in cerebral circulation disorders. In another field of 25 activity, it appears that the crystalline V form of agomelatine can be used in the treatment of sexual dysfunction, that it has ovulation-inhibiting and immunomodulating properties and that it lends itself to use in the treatment of cancers.
The crystalline form V of agomelatine will preferably be used in the treatment of severe depression, seasonal affective disorders, sleep disorders, cardiovascular pathologies, 30 insomnia and fatigue due to jetlag, appetite disorders and obesity.
The invention relates also to pharmaceutical compositions comprising as active ingredient the crystalline form V of agomelatine together with one or more appropriate inert, nontoxic excipients. Among the pharmaceutical compositions according to the invention there may be mentioned, more especially, those which are suitable for oral, parenteral (intravenous or subcutaneous) or nasal administration, tablets or dragees, granules, sublingual tablets, gelatin capsules, lozenges, suppositories, creams, ointments, dermal gels, injectable preparations, drinkable suspensions and disintegrable pastes.
The useful dosage can be adapted according to the nature and the severity of the disorder, the administration route and the age and weight of the patient. The dosage varies from 0.1 mg to 1 g per day in one or more administrations.
The term "comprising" as used in this specification means "consisting at least in part of'. When interpreting each statement in this specification that includes the term "comprising", features other than that or those prefaced by the term may also be present. Related terms such as "comprise" and "comprises" are to be interpreted in the same manner.
The Examples below illustrate the invention but do not limit it in any way.
Example 1 : Crystalline form V of A42-(7-Methoxy-l-naphthyI)ethyl]acetamide 100 g of jV-[2-(7-Methoxy-1 -naphthyl)ethyl]acetamide are put in a mechanical grinder of the vario-planetary mill type for about 6 hours and the solid obtained is characterised by the following powder X-ray diffraction diagram, measured using a Siemens D5005 dififractometer (copper anticathode) and expressed in terms of inter-planar distance d, Bragg's angle 2 theta, intensity and relative intensity (expressed as a percentage of the most intense ray): INTELLECTUAL PROPERTY OFFICE OF N.Z. 06 JUL 2007 received 2-Theta (°) d(A) Intensity exp. exp. (%) 9.84 8.979 17 12.40 7.134 13.31 6.646 19 .14 .848 18 .98 .543 18 16.62 .329 19 17.95 4.939 100 18.88 4.697 65 .49 4.332 24 .99 4.228 34 23.07 3.852 39 23.44 3.792 36 24.28 3.663 58 .10 3.545 19 26.02 3.422 26.82 3.322 19 27.51 3.239 16 Example 2 : Crystalline form V of iV-[2-(7-Methoxy-l-naphthyl)ethylIacetamide 4 g of iV-[2-(7-Methoxy-1 -naphthyl)ethyl]acetamide are put in a ventilated incubator at 110°C. After 1 hour at 110°C, the product is immediately placed at room temperature and seeded with 5 0.05 g of crystalline form V of iV-[2-(7-Methoxy-1 -naphthyl)ethyl]acetamide structurally pure obtained by mechanical grinding of high energy. After 5 minutes, the crystallisation is complete and the solid obtained is characterised by the following powder X-ray diffraction diagram, measured using a Siemens D5005 diffractometer (copper anticathode) and expressed in terms of inter-planar distance d, Bragg's angle 2 theta, intensity and relative intensity 10 (expressed as a percentage of the most intense ray): 2-Theta (°) d(A) Intensity exp. exp. (%) 9.84 8.979 17 12.40 7.134 13.31 6.646 19 .14 .848 18 .98 .543 18 16.62 .329 19 17.95 4.939 100 18.88 4.697 65 .49 4.332 24 .99 4.228 34 23.07 3.852 39 23.44 3.792 36 24.28 3.663 58 .10 3.545 19 26.02 3.422 26.82 3.322 19 27.51 3.239 16 Exampie 3 : Pharmaceutical composition Formulation for the preparation of 1000 tablets each containing a dose of 25 mg : Compound of Example 1 or 2 25 g Lactose monohydrate 62 g Magnesium stearate , 1.3 g Maize starch 26 g Maltodextrines 9 g Silica, colloidal anhydrous 0.3 g Sodium starch glycolate type A 4 g Stearic acid 2.6 g Example 4 : Pharmaceutical composition Formulation for the preparation of 1000 tablets each containing a dose of 25 mg : Compound of Example 1 or 2 25 g Lactose monohydrate 62 g Magnesium stearate 1.3 g Povidone 9 g Silica, colloidal anhydrous 0.3 g Sodium cellulose glycolate 30 g Stearic acid 2.6 g

Claims (12)

WHAT WE CLAIM IS:
1, Crystalline form V of agomelatine of formula (I): MeO NHCOMe 0) characterised by the following powder X-ray diffraction diagram, measured using a dififractometer (copper anticathode) and expressed in terms of inter-planar distance d, Bragg's angle 2 theta, intensity and relative intensity (expressed as a percentage with respect to the most intense ray) : 2-Theta (°) d(A) Intensity exp. exp. (%) 9.84 8.979 17 12.40 7.134 15 13.31 6.646 19 15.14 5.848 18 15.98 5.543 18 16.62 5.329 19 17.95 4.939 100 18.88 4.697 65 20.49 4.332 24 20.99 4.228 34 23.07 3.852 39 23.44 3.792 36 24.28 3.663 58 25.10 3.545 19 26.02 3.422 15 26.82 3.322 19 27.51 3.239 16 INTELLECTUAL PROPERTY OFFICE OF N.Z. OS JUL 2007 R E CEIVED -9-
2. Process for the preparation of the crystalline form V of the compound of formula (I) according to claim 1, characterised in that agomelatine is subjected to a mechanical grinding which is said to be "of high energy".
3. Process for the preparation of the crystalline form V of the compound of formula (I) 5 according to claim 1, characterised in that agomelatine is heated until complete melting, then immediately put at room temperature and simultaneously a small quantity of crystalline form V of compound of formula (I) freshly prepared is added, and the mixture is cooled until crystallisation is complete.
4. Pharmaceutical compositions comprising as active ingredient crystalline form V of 10 agomelatine according to claim 1, in combination with one or more pharmaceutically acceptable, inert, non-toxic carriers.
5. Pharmaceutical compositions according to claim 4 for use in the manufacture of a medicament for the treatment of melatoninergic disorders.
6. Pharmaceutical compositions according to claim 4 for use in the manufacture of a 15 medicament for the treatment of sleep disorders, stress, anxiety, seasonal affective disorders or severe depression, cardiovascular pathologies, pathologies of the digestive system, insomnia and fatigue due to jetlag, schizophrenia, panic attacks, melancholia, appetite disorders, obesity, insomnia, psychotic disorders, epilepsy, diabetes, Parkinson's disease, senile dementia, various disorders associated with normal or 20 pathological ageing, migraine, memory loss, Alzheimer's disease, cerebral circulation disorders, and also in sexual dysfunction, as ovulation inhibitors, immunomodulators and cancers.
7. A use of a crystalline form V of agomelatine as defined in claim 1 in the manufacture of a medicament for treating melatoninergic disorders. intellectual property office of n.2. 66 JUL 2007 RECEIVED -10-
8. A use of a crystalline form V of agomelatine as defined in claim 1 in the manufacture of a medicament for treating sleep disorders, stress, anxiety, seasonal affective disorders or severe depression, cardiovascular pathologies, pathologies of the digestive system, insomnia and fatigue due to jetlag, schizophrenia, panic attacks, melancholia, appetite disorders, obesity, insomnia, psychotic disorders, epilepsy, diabetes, Parkinson's disease, senile dementia, various disorders associated with normal or pathological ageing, migraine, memory loss, Alzheimer's disease, cerebral circulation disorders, and also in sexual dysfunction, as ovulation inhibitors, immunomodulators and cancers.
9. A crystalline form V of agomelatine according to claim 1 substantially as herein described with reference to any example thereof.
10. A process according to claim 2 or claim 3 substantially as herein described with reference to any example thereof.
11. A pharmaceutical composition according to claim 4 substantially as herein described with reference to any example thereof.
12. A use according to claim 7 or claim 8 substantially as herein described with reference to any example thereof. 974123-1 INTELLECTUAL PROPERTY OFFICE OF N.Z. OS JUL 2007 RECEIVED
NZ548864A 2005-08-03 2006-08-01 New cyrstalline form V of agomelatine, a process for its preparation and pharmaceutical compositions containing it NZ548864A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0508278A FR2889523B1 (en) 2005-08-03 2005-08-03 NOVEL CRYSTALLINE FORM V OF AGOMELATIN, PROCESS FOR PREPARING THE SAME AND PHARMACEUTICAL COMPOSITIONS CONTAINING THE SAME

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NZ548864A true NZ548864A (en) 2008-03-28

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