WO2004099198A1 - Derives de benzoxazinone possedant une affinite avec des recepteurs 5-ht, preparation et utilisation de ceux-ci - Google Patents

Derives de benzoxazinone possedant une affinite avec des recepteurs 5-ht, preparation et utilisation de ceux-ci Download PDF

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Publication number
WO2004099198A1
WO2004099198A1 PCT/EP2004/005006 EP2004005006W WO2004099198A1 WO 2004099198 A1 WO2004099198 A1 WO 2004099198A1 EP 2004005006 W EP2004005006 W EP 2004005006W WO 2004099198 A1 WO2004099198 A1 WO 2004099198A1
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WO
WIPO (PCT)
Prior art keywords
fluoro
methyl
compound
ethyl
oxazin
Prior art date
Application number
PCT/EP2004/005006
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English (en)
Inventor
Antonio Kuok Keong Vong
Simon Edward Ward
Original Assignee
Glaxo Group Limited
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 Glaxo Group Limited filed Critical Glaxo Group Limited
Publication of WO2004099198A1 publication Critical patent/WO2004099198A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
    • C07D413/14—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing three or more hetero rings
    • 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

Definitions

  • the present invention relates to novel compounds, processes for their preparation, pharmaceutical compositions containing the same and their use as medicaments. More 5 particularly this invention relates to novel benzoxazinone derivatives and their utility in the treatment and/ of CNS and other disorders.
  • the present invention provides, in a first aspect, a compound of formula (I) or a pharmaceutically acceptable salt thereof: 0
  • R1 is hydrogen or C-j. ⁇ alkyl
  • R2 is fluoro or chloro
  • 5 R3 is hydrogen, fluoro or chloro
  • X is nitrogen or CH.
  • C-i.galkyl refers to alkyl groups having from one to six carbon atoms, in all isomeric forms, including methyl, ethyl, propyl, 0 isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, neopentyl, sec-pentyl, n-pentyl, isopentyl, tert-pentyl and hexyl.
  • R1 is hydrogen, methyl or ethyl.
  • R2 is fluoro.
  • Preferred compounds of this invention are:
  • the compounds of formula (I) can form acid addition salts thereof. It will be appreciated that for use in medicine the salts of the compounds of formula (I) should be pharmaceutically acceptable. Suitable pharmaceutically acceptable salts will be apparent to those skilled in the art and include those described in J. Pharm. Sci., 1977, 66, 1-19, such as acid addition salts formed with inorganic acids e.g. hydrochloric, hydrobromic, sulfuric, nitric or phosphoric acid; and organic acids e.g. succinic, maleic, acetic, fumaric, citric, tartaric, benzoic, p-toluenesulfonic, methanesulfonic or naphthalenesulfonic acid. Certain of the compounds of formula (I) may form acid addition salts with one or more equivalents of the acid.
  • the present invention includes within its scope all possible stoichiometric and non-stoichiometric forms.
  • the compounds of formula (I) may be prepared in crystalline or non-crystalline form, and, if crystalline, may optionally be hydrated or solvated.
  • This invention includes within its scope stoichiometric hydrates or solvates as well as compounds containing variable amounts of water and/or solvent.
  • the compounds of the present invenion may be prepared in an analogous manner to the processes disclosed in WO02/34754.
  • Pharmaceutically acceptable salts may be prepared conventionally by reaction with the appropriate acid or acid derivative.
  • D receptors can be determined by the following assay.
  • CHO cells expressing 5-HT-IA receptors (4 x 10? cells/ml) are homogenised in Tris buffer and stored in 1ml aliquots.
  • ⁇ receptors (4 x 10? cells/ml) are homogenised in Tris buffer and stored in 1.5 m! aliquots.
  • Q receptors (1 x l O ⁇ /ml) are homogenised in Tris buffer and stored in 1 ml aliquots.
  • 0.4 ml of a cell suspension is incubated with [ 3 H]-5-HT (4nM) for 5-HT 1 B 1 D receptors and [ 3 H]WAY100635 (1 nM) for 5-HT-j A receptors in Tris Mg HCI buffer (pH 7.7) and test drug, at 37°C for 45 minutes. Each test drug is tested at 10 concentrations (0.01 mM to 0.3 nM final concentration), with non-specific binding defined using 0.01 mM 5-HT. The total assay volume is 0.5 ml. Incubation is stopped by rapid filtration using a Packard Filtermate and radioactivity measured by Topcount scintillation counting. pKi values are calculated from the IC50 generated by an iterative least squares curve fitting programme.
  • Example compounds shown below were tested according to the radioligand binding assay described above and were found to have pKi values > 7.5 at 5-HT-JA receptors, with many showing a considerably higher affinity (having pKi values in the range 7.5 - 8.8). Certain compounds of this invention also demonstrate comparable affinity for 5-HT-j Q and 5-HT-j rj receptors.
  • the intrinsic activity of the compounds of this invention can be determined according to the following assay.
  • HEK293 cell membranes stably expressing human 5-HT- j A receptors and CHO cell membranes stably expressing human 5-HT-j Q receptors are homogenised in HEPES/EDTA buffer and stored in 1 ml aliquots, and [ 3 5s]GTP ⁇ S binding studies are carried out essentially as described by Lazareno et al., (Life Sci., 1993, 52, 449) with some minor modifications.
  • Membranes from 10 ⁇ cells are pre-incubated at 30°C for 30 minutes in 20 mM HEPES buffer (pH 7.4) in the presence of MgCl2 (3 mM), NaCI (100 mM), GDP (10 ⁇ M) and ascorbate (0.2 mM), with or without test compounds.
  • the reaction is started by the addition of 50 ⁇ l of [ 35 S]GTP ⁇ S (100 pM, assay concentration) followed by a further 30 minutes incubation at 30°C.
  • Non-specific binding is determined using nonradiolabelled GTP ⁇ S (20 ⁇ M) added prior to the membranes.
  • the reaction is terminated by rapid filtration through Whatman GF/B grade filters followed by 5 x 1 ml washes with ice cold HEPES (20 mM) /MgCl2 (3 mM) buffer. Radioactivity is measured using liquid scintillation spectrometry. This procedure is hereafter referred to as the [ 35 S]GTP ⁇ S functional assay.
  • the efficacy of the compounds of this invention to inhibit the re-uptake of serotonin can be measured in a 5-HT uptake assay by measurement of uptake of [ 3 H]-5-HT into LLCPK cells expressing human or rat serotonin transporters.
  • cells are harvested and plated onto 96-well plates (10,000 cells per well). 24hr later cells are washed 2x with HBSSH (Hanks'balanced salt solution + 20mM HEPES). 50ul of test compound or vehicle is added to each well and incubated for 10min. Subsequently, [ 3 H]5-HT (final concentration 25nM) is added and the test mixture is incubated for a further 7min.
  • Example compounds tested according to this uptake assay were found to have potency at the uptake site of PIC50 of > 6.0. Some showed a considerably higher potency (PIC50 > 6.5-7.8).
  • Certain compounds of formula (I) demonstrate both affinity for the 5-HT- j A receptor (or affinity for 5-HT-
  • Compounds of the present invention are of use in the treatment of certain CNS disorders, particularly serotonin-related disorders such as depression (which term is used herein to include bipolar depression, unipolar depression, single or recurrent major depressive episodes with or without psychotic features, catatonic features, melancholic features, atypical features or postpartum onset, seasonal affective disorder, dysthymic disorders with early or late onset and with or without atypical features, neurotic depression and social phobia, depression accompanying dementia for example of the Alzheimer's type, vascular dementia with depressed mood, schizoaffective disorder or the depressed type, and depressive disorders resulting from general medical conditions including, but not limited to, myocardial infarction, diabetes, miscarriage or abortion, etc), anxiety disorders (including generalised anxiety disorder and social anxiety disorder), schizophrenia, panic disorder, agoraphobia, social phobia, obsessive compulsive disorder and post-traumatic stress disorder, pain (particularly neuropathic pain), memory disorders, including dementia, amnesic disorders and age
  • amphetamine or amphetamine-related drugs e.g. dextroamphetamine, methylamphetamine
  • motor disorders such as Parkinson's disease, dementia in Parkinson's disease, neuroleptic-induced Parkinsonism and tardive dyskinesias, as well as other psychiatric disorders.
  • Compounds of formula (I) may also have utility in the treatment of certain gastrointestinal disorders such as irritable bowel syndrome, Crohn's disease, ulcerative colitis, non-steroidal anti- inflammatory drug induced damage.
  • the invention also provides a compound of formula (I) or a pharmaceutically acceptable salt thereof, for use as a therapeutic substance, in particular in the treatment of the above disorders.
  • the invention provides a compound of formula (I) or a pharmaceutically acceptable salt thereof for use in the treatment of a CNS disorder, particularly depression or anxiety.
  • treatment includes amelioration of established symptoms as well as prophylaxis.
  • Compounds of the invention may be administered in combination with other active substances such as 5HT3 antagonists, NK-1 antagonists, serotonin agonists, selective serotonin reuptake inhibitors (SSRI), noradrenaline re-uptake inhibitors (SNRI), tricyclic antidepressants and/or dopaminergic antidepressants.
  • active substances such as 5HT3 antagonists, NK-1 antagonists, serotonin agonists, selective serotonin reuptake inhibitors (SSRI), noradrenaline re-uptake inhibitors (SNRI), tricyclic antidepressants and/or dopaminergic antidepressants.
  • Suitable 5HT3 antagonists which may be used in combination of the compounds of the inventions include for example ondansetron, granisetron, metoclopramide.
  • Suitable serotonin agonists which may be used in combination with the compounds of the invention include sumatriptan, rauwolscine, yohimbine, metoclopramide.
  • Suitable SSRIs which may be used in combination with the compounds of the invention include fluoxetine, citalopram, femoxetine, fluvoxamine, paroxetine, indalpine, sertraline, zimeldine.
  • Suitable SNRIs which may be used in combination with the compounds of the invention include venlafaxine and reboxetine.
  • Suitable tricyclic antidepressants which may be used in combination with a compound of the invention include imipramine, amitriptiline, chlomipramine and nortriptiline.
  • Suitable dopaminergic antidepressants which may be used in combination with a compound of the invention include bupropion and amineptine.
  • the compounds of the combination or composition may be administered simultaneously (either in the same or different pharmaceutical formulations), separately or sequentially.
  • the invention further provides a method of treatment of the above disorders, particularly a CNS disorder, in particular depression or anxiety, in mammals including humans, which comprises administering to the sufferer a therapeutically safe and effective amount of a compound of formula (I) or a pharmaceutically acceptable salt thereof.
  • the invention provides for the use of a compound of formula (I) or a pharmaceutically acceptable salt thereof in the manufacture of a medicament for use in the treatment of the above disorders, particularly a CNS disorder, in particular depression or anxiety.
  • the present invention also provides a pharmaceutical composition, which comprises a compound of formula (I) or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier or excipient.
  • the present invention provides a process for preparing a pharmaceutical composition, the process comprising mixing a compound of formula (I) or a pharmaceutically acceptable salt thereof and a pharmaceutically acceptable carrier or excipient.
  • a pharmaceutical composition of the invention which may be prepared by admixture, suitably at ambient temperature and atmospheric pressure, is usually adapted for oral, parenteral or rectal administration and, as such, may be in the form of tablets, capsules, oral liquid preparations, powders, granules, lozenges, reconstitutable powders, injectable or infusible solutions or suspensions or suppositories. Orally administrable compositions are generally preferred.
  • Tablets and capsules for oral administration may be in unit dose form, and may contain conventional excipients, such as binding agents (e.g. pregelatinised maize starch, polyvinylpyrrolidone or hydroxypropyl methylcellulose);, fillers (e.g. lactose, microcrystalline cellulose or calcium hydrogen phosphate);, tabletting lubricants lubricants (e.g. magnesium stearate, talc or silica);, disintegrants (e.g. potato starch or sodium starch glycollate); and acceptable wetting agents (e.g. sodium lauryl sulphate).
  • binding agents e.g. pregelatinised maize starch, polyvinylpyrrolidone or hydroxypropyl methylcellulose
  • fillers e.g. lactose, microcrystalline cellulose or calcium hydrogen phosphate
  • tabletting lubricants lubricants e.g. magnesium stearate, talc or silica
  • disintegrants e.g.
  • Oral liquid preparations may be in the form of, for example, aqueous or oily suspension, solutions, emulsions, syrups or elixirs, or may be in the form of a dry product for reconstitution with water or other suitable vehicle before use.
  • Such liquid preparations may contain conventional additives such as suspending agents (e.g. sorbitol syrup, cellulose derivatives or hydrogenated edible fats), emulsifying agents (e.g. lecithin or acacia), non-aqueous vehicles (which may include edible oils e.g. almond oil, oily esters, ethyl alcohol or fractionated vegetable oils), preservatives (e.g.
  • Preparations for oral administration may be suitably formulated to give controlled release of the active compound.
  • fluid unit dosage forms are prepared utilising a compound of the invention or pharmaceutically acceptable salt thereof and a sterile vehicle.
  • Formulations for injection may be presented in unit dosage form e.g. in ampoules or in multi-dose, utilising a compound of the invention or pharmaceutically acceptable salt thereof and a sterile vehicle, optionally with an added preservative.
  • compositions may take such forms as suspensions, solutions or emulsions in oily or aqueous vehicles, and may contain formulatory agents such as suspending, stabilising and/or dispersing agents.
  • the active ingredient may be in powder form for constitution with a suitable vehicle, e.g. sterile pyrogen-free water, before use.
  • a suitable vehicle e.g. sterile pyrogen-free water
  • the compound depending on the vehicle and concentration used, can be either suspended or dissolved in the vehicle.
  • the compound can be dissolved for injection and filter sterilised before filling into a suitable vial or ampoule and sealing.
  • adjuvants such as a local anaesthetic, preservatives and buffering agents are dissolved in the vehicle.
  • the composition can be frozen after filling into the vial and the water removed under vacuum.
  • Parenteral suspensions are prepared in substantially the same manner, except that the compound is suspended in the vehicle instead of being dissolved, and sterilisation cannot be accomplished by filtration.
  • the compound can be sterilised by exposure to ethylene oxide before suspension in a sterile vehicle.
  • a surfactant or wetting agent is included in the composition to facilitate uniform distribution of the compound.
  • Lotions may be formulated with an aqueous or oily base and will in general also contain one or more emulsifying agents, stabilising agents, dispersing agents, suspending agents, thickening agents, or colouring agents. Drops may be formulated with an aqueous or non- aqueous base also comprising one or more dispersing agents, stabilising agents, solubilising agents or suspending agents. They may also contain a preservative.
  • the compounds of the invention may also be formulated in rectal compositions such as suppositories or retention enemas, e.g. containing conventional suppository bases such as cocoa butter or other glycerides.
  • the compounds of the invention may also be formulated as depot preparations. Such long acting formulations may be administered by implantation (for example subcutaneously or intramuscularly) or by intramuscular injection.
  • the compounds of the invention may be formulated with suitable polymeric or hydrophobic materials (for example as an emulsion in an acceptable oil) or ion exchange resins, or as sparingly soluble derivatives, for example, as a sparingly soluble salt.
  • the compounds of the invention may be formulated as solutions for administration via a suitable metered or unitary dose device or alternatively as a powder mix with a suitable carrier for administration using a suitable delivery device.
  • compounds of formula (I) may be formulated for oral, buccal, parenteral, topical (including ophthalmic and nasal), depot or rectal administration or in a form suitable for administration by inhalation or insufflation (either through the mouth or nose).
  • the compounds of the invention may be formulated for topical administration in the form of ointments, creams, gels, lotions, pessaries, aerosols or drops (e.g. eye, ear or nose drops).
  • Ointments and creams may, for example, be formulated with an aqueous or oily base with the addition of suitable thickening and/or gelling agents.
  • Ointments for administration to the eye may be manufactured in a sterile manner using sterilised components.
  • the composition may contain from 0.1% to 99% by weight, preferably from 10 to 60% by weight, of the active material, depending on the method of administration.
  • the dose of the compound used in the treatment of the aforementioned disorders will vary in the usual way with the seriousness of the disorders, the weight of the sufferer, and other similar factors.
  • suitable unit doses may be 0.05 to 1000 mg, more suitably 1.0 to 200 mg, and such unit doses may be administered more than once a day, for example two or three times a day. Such therapy may extend for a number of weeks or months.

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  • 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)
  • 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 des composés représentés par la formule (I) ainsi que des sels pharmaceutiquement acceptables de ceux-ci. Dans la formule (I), R1 représente hydrogène ou alkyle C1-6, R2 représente fluoro ou chloro, R3 représente hydrogène, fluoro ou chloro, et X représente nitrogène ou CH. L'invention concerne également des procédés de préparation et d'utilisation de ces composés dans le traitement de troubles du système nerveux central (SNC) tels que la dépression ou l'anxiété.
PCT/EP2004/005006 2003-05-12 2004-05-10 Derives de benzoxazinone possedant une affinite avec des recepteurs 5-ht, preparation et utilisation de ceux-ci WO2004099198A1 (fr)

Applications Claiming Priority (2)

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GBGB0310849.5A GB0310849D0 (en) 2003-05-12 2003-05-12 Compounds
GB0310849.5 2003-05-12

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WO2004099198A1 true WO2004099198A1 (fr) 2004-11-18

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002034754A2 (fr) * 2000-10-26 2002-05-02 Smithkline Beecham P.L.C. Derives de benzoxazinone, leur preparation et utilisation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002034754A2 (fr) * 2000-10-26 2002-05-02 Smithkline Beecham P.L.C. Derives de benzoxazinone, leur preparation et utilisation

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