WO2003051873A1 - Composes de piperazine et leur utilisation pharmaceutique - Google Patents

Composes de piperazine et leur utilisation pharmaceutique Download PDF

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Publication number
WO2003051873A1
WO2003051873A1 PCT/GB2002/005676 GB0205676W WO03051873A1 WO 2003051873 A1 WO2003051873 A1 WO 2003051873A1 GB 0205676 W GB0205676 W GB 0205676W WO 03051873 A1 WO03051873 A1 WO 03051873A1
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Prior art keywords
optionally substituted
compound
formula
pharmaceutically acceptable
orexin
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PCT/GB2002/005676
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English (en)
Inventor
Clive Leslie Branch
Steven Coulton
David John Nash
Roderick Alan Porter
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Smithkline Beecham Plc
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Priority to AU2002352389A priority Critical patent/AU2002352389A1/en
Publication of WO2003051873A1 publication Critical patent/WO2003051873A1/fr

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    • 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
    • C07D401/14—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 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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
    • C07D403/14—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing three or more hetero rings
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
    • C07D417/14—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing three or more hetero rings

Definitions

  • This invention relates to piperazine derivatives and their use as pharmaceuticals. Many medically significant biological processes are mediated by proteins participating in signal transduction pathways that involve G-proteins and/or second messengers.
  • Polypeptides and polynucleotides encoding the human 7-transmembrane G-protein coupled neuropeptide receptor, orexin-1 have been identified and are disclosed in EP-A- 875565, EP-A-875566 and WO 96/34877.
  • Polypeptides and polynucleotides encoding a second human orexin receptor, orexin-2 have been identified and are disclosed in EP-A- 893498.
  • polypeptides and polynucleotides encoding polypeptides which are ligands for the orexin-1 receptor, e.g. orexin-A (Lig72A) are disclosed in EP-A-849361.
  • Orexin receptors are found in the mammalian host and may be responsible for many biological functions, including pathologies including, but not limited to, depression; anxiety; addictions; obsessive compulsive disorder; affective neurosis/disorder; depressive neurosis/disorder; anxiety neurosis; dysthymic disorder; behaviour disorder; mood disorder; sexual dysfunction; psychosexual dysfunction; sex disorder; sexual disorder; schizophrenia; manic depression; delerium; dementia; severe mental retardation and dys inesias such as Huntington's disease and Gilles de la Tourett's syndrome; disturbed biological and circadian rhythms; feeding disorders, such as anorexia, bulimia, cachexia, and obesity; diabetes; appetite/taste disorders; vomiting/nausea; asthma; cancer; Parkinson's disease; Cushing's syndrome / disease; basophil adenoma; prolactinoma; hype rolactinemia; hypopituitarism; hypophysis tumor / adenoma; hypothala
  • HTV post-polio syndrome, and post-herpetic neuralgia
  • phantom limb pain labour pain; cancer pain; post-chemotherapy pain; post-stroke pain; post-operative pain; neuralgia; nausea, vomiting; conditions associated with visceral pain including irritable bowel syndrome, migraine and angina; urinary bladder incontinence e.g.
  • narcotics or withdrawal from narcotics sleep disorders; sleep apnea; narcolepsy; insomnia; parasomnia; jet-lag syndrome; and neurodegenerative disorders, which includes nosological entities such as disinhibition-dementia-parkinsonism-amyotrophy complex; pallido-ponto-nigral degeneration, epilepsy, and seizure disorders.
  • the present invention provides piperazine derivatives which are non-peptide antagonists of human orexin receptors, in particular orexin-1 receptors.
  • these compounds are of potential use in the treatment of obesity, including obesity observed in Type 2 (non-insulin- dependent) diabetes patients, and or sleep disorders, and/or stroke, particularly ischemic or haemorrhagic stroke, andor for blocking the emetic response i.e. useful in the treatment of nausea and vomiting.
  • R 1 and R 2 independently represent hydrogen or optionally substituted (C «)alkyl;
  • Het represents an optionally substituted 5- or 6- membered heteroaryl group containing up to 3 heteroatoms selected from N, O, and S, or an optionally substituted bicyclic heteroaryl group containing up to 3 heteroatoms selected from N, O and S;
  • Ar represents a phenyl or a 5- or 6-membered heteroaryl group containing up to 3 heteroatoms selected from N, O and S, wherein the phenyl or heteroaryl group is substituted by R 3 , and further optional substituents; or Ar represents an optionally substituted bicyclic aromatic or heteroaromatic group containing up to 3 heteroatoms selected from N, O and S;
  • R 3 independently represents hydrogen, an optionally substituted (C ⁇ alkoxy, halo, optionally substituted optionally substituted phenyl, or an optionally substituted 5- or 6- membered heterocyclic ring containing up to 3 heteroatoms selected from N, O and S; or pharmaceutically acceptable derivatives thereof.
  • Examples of 5- or 6- membered heteroaryl group containing up to 3 heteroatoms selected fromN, O and S, include furanyl, thienyl, pyrrolyl, oxazolyl, thiazolyl, imidazolyl, oxadiazolyl, thiadiazolyl, pyridyl, triazolyl, triazinyl, pyridazinyl, pyrimidinyl, isothiazolyl, isoxazolyl, pyrazinyl, or pyrazolyl.
  • Het represents a bicyclic heteroaryl it may be selected from isoquinolinyl, quinoxalinyl, benzoxazolyl, quinolinyl, napththyridinyl, benzofuranyl, benzimidazolyl, benzothienyl, indolyl, benzothiazoyl, quinazolinyl or benzoxazolyl.
  • Ar represents an optionally substituted bicyclic aromatic or heteroaromatic
  • Ar represents an optionally substituted bicyclic aromatic or heteroaromatic
  • R 1 is hydrogen or methyl
  • R 2 is hydrogen or methyl.
  • Het represents pyridyl, pyrimidinyl or quinoxalinyl.
  • Ar represents phenyl, or a 5-or 6- membered heteroaryl group the substituent R 3 is ortho to the amide carbonyl group.
  • Ar represents optionally substituted thiazolyl or pyrazolyl.
  • groups where R 3 is a 5- or 6-membered heterocyclic ring containing up to 3 heteroatoms selected from N, O and S include furanyl, thienyl, pyrrolyl, oxazolyl, thiazolyl, imidazolyl, oxadiazolyl, thiadiazolyl, pyridyl, triazolyl, piperazine, triazinyl, pyridazyl, pyrimidinyl, isothiazolyl, isoxazolyl, pyrazinyl, pyrazolyl, piperidine, thiomorpholine and mo ⁇ holine.
  • R 3 represents trifluoromethoxy, methoxy, ethoxy, halo, or optionally substituted phenyl, pyridyl, pyrazolyl, pyrimidinyl or oxadiazolyl group. Even more preferably R 3 represents an optionally substituted phenyl, e.g.4-fluorophenyl.
  • amide carbonyl group means the -C(O)-N- bond wherein the N forms part of the piperazine ring.
  • Optional substituents for the groups R 1 to R 3 , Ar and Het include halogen, hydroxy, oxo, cyano, nitro, (C ⁇ _ 4 )alkyl, (C w )alkoxy, halo(C w )alkyl, halo(C ⁇ _ 4 )alkoxy, (C ⁇ acyl, aryl, aryl(C ⁇ .
  • R a SO 2 NR b (CH 2 ) r where each of R a and R b independently represents a hydrogen atom or a (Cw)alkyl group or where appropriate R a R b forms part of a (C 3 _ 6 )azacycloalkane or (C 3 ⁇ )(2-oxo)azacycloalkane ring, n represents an interger from 1 to 4, and r represents zero or an integer from 1 to 4. Additionally when the substituent is R ⁇ N ⁇ CH ⁇ n- or R ⁇ tCH nO, R a with at least one CH 2 of the (CH 2 )n portion of the group form a (C 3 .
  • R b represents hydrogen, a (C ⁇ _ 4 )alkyl group or with the nitrogen to which it is attached forms a second (C 3 ⁇ )azacycloalkane fused to the first (C 3 -s)azacycloalkane.
  • Preferred optional substituents for Ar are halogen, cyano, hydroxy(C w )alkyl or (C M )alkoxy(C M )alkyl.
  • Preferred optional substituents for Het are halogen, cyano, (Cw)alkyl, hydroxy(C ⁇ - 4 )alkyl, (C M )acyl, (C M )alkoxy(C w )alkyl or ⁇ CCXCH ⁇ .
  • Preferred optional substituents for R 3 are halogen or (C ⁇ _ ⁇ )alkoxy(C M )alkyl.
  • Het may be optionally substituted by a phenyl ring optionally substituted by a halogen, cyano, or Cmalkanoyl or group; or by a 5- or 6-membered heterocyclic ring, optionally substituted by a (C ⁇ . 2 )alkyl or R'H ⁇ - group; wherein R a and R b are as defined above.
  • aryl means a 5- to 6- membered aromatic ring for example phenyl, or a 7 to 12 membered bicyclic ring system where at least one of the rings is aromatic for example naphthyl.
  • substituents positioned ortho to one another may be linked to form a fused ring.
  • a halogen atom is present in the compound of formula (I) it may be fluorine, chlorine, bromine or iodine.
  • the alkyl group may be straight chain, branched or cyclic, or combinations thereof, it is preferably methyl or ethyl.
  • compounds of formula (1) may exist as R or S enantiomers.
  • the present invention includes within its scope all such isomers, including mixtures. Where additional chiral centres are present in compounds of formula (I), the present invention includes within its scope all possible diastereoismers, including mixtures thereof.
  • the different isomeric forms may be separated or resolved one from the other by conventional methods, or any given isomer may be obtained by conventional synthetic methods or by stereospecif ⁇ c or asymmetric syntheses.
  • Particular compounds according to the invention include those mentioned in the examples and their pharmaceutically acceptable derivatives.
  • pharmaceutically acceptable derivative includes any pharmaceutically acceptable salt, ester or salt of such ester of a compound of formula (I) which, upon administration to the recipient is capable of providing (directly or indirectly) a compound of formula (T) or an active metabolic or residue thereof.
  • 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 acid addition salts formed with inorganic acids e.g. hydrochloric, hydrobromic, sulphuric, nitric or phosphoric acid; and organic acids e.g.
  • succinic maleic, acetic, fumaric, citric, tartaric, benzoic, p-toluenesulfonic, methanesulfonic or naphthalenesulfonic acid.
  • Other salts e.g. oxalates, may be used, for example in the isolation of compounds of formula (T) and are included within the scope of this invention.
  • Also included within the scope of the invention are solvates and hydrates of compounds of formula (I).
  • 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 (T) are intended for use in pharmaceutical compositions it will readily be understood that they are each preferably provided in substantially pure form, for example at least 60% pure, more suitably at least 75% pure and preferably at least 85%, especially at least 98% pure (% are on a weight for weight basis). Impure preparations of the compounds may be used for preparing the more pure forms used in the pharmaceutical compositions.
  • R 5 is an optionally substituted - ⁇ alkyl group
  • P is a protecting group
  • L 1 is a leaving group
  • protecting groups P include t-butyloxycarbonyl, trifluoroacetyl, benzyloxycarbonyl and optionally substituted benzyl.
  • Deprotection conditions will depend on the particular protecting group; for the groups mentioned above these are respectively, acid (e.g. trifluoroacetic acid in dichloromethane), base (e.g. potassium carbonate in a solvent such as aqueous methanol) and catalytic hydrogenolysis in an inert solvent (e.g. using palladium on charcoal in a lower alcohol or ethyl acetate).
  • Acylation may be carried out using a wide range of known conditions, e.g. in an inert solvent such as dichloromethane, in the presence of a base such as triethylamine.
  • these steps may be carried out when L 1 represents hydroxy, in which case the reaction takes place in an inert solvent such as dichloromethane in the presence of a diimide reagent such as l-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride, and an activator such as 1- hydroxybenzotriazole.
  • a diimide reagent such as l-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride
  • an activator such as 1- hydroxybenzotriazole.
  • Compound A can be prepared by known methods, e.g. WO 9631505.
  • R 6 is an optionally substituted C ⁇ . 6 alkyl group
  • P 1 and P 2 are protecting groups and L 1 is a leaving group as described for scheme 1.
  • Reduction of the amide can be carried out using known methods e.g. with a metal hydride reducing agent such as lithium aluminium hydride in an inert solvent such as diethyl ether or tetrahydrofuran.
  • a metal hydride reducing agent such as lithium aluminium hydride in an inert solvent such as diethyl ether or tetrahydrofuran.
  • Compound B can be synthesised using known methods.
  • Ar, R 1 , and Het are as defined for formula (I) and R2 is optionally substituted (Chalky., P 1 and P 2 are protecting groups.
  • the compounds of formula (I) may be prepared singly or as compound libraries comprising at least 2, e.g. 5 to 1000, preferably 10 to 100 compounds of formula (I).
  • Compound libraries may be prepared by a combinatorial 'split and mix' approach or by multiple parallel synthesis using either solution phase or solid phase chemistry, by procedures known to those skilled in the art.
  • a compound library comprising at least 2 compounds of formula (I), or pharmaceutically acceptable derivatives thereof.
  • Pharmaceutically acceptable salts may be prepared conventionally by reaction with the appropriate acid or acid derivative.
  • the compounds of formula (I) and their pharmaceutically acceptable derivatives are useful for the treatment of diseases or disorders where an antagonist of a human orexin receptor is required such as obesity and diabetes; prolactinoma; hypoprolactinemia; hypothalamic disorders of growth hormone deficiency; idiopathic growth hormone deficiency; Cushings syndrome/disease; hypothalamic-adrenal dysfunction; dwarf ⁇ sm; sleep disorders; sleep apnea; narcolepsy; insomnia; parasomnia; jet-lag syndrome; sleep disturbances associated with diseases such as neurological disorders, neuropathic pain and restless leg syndrome; heart and lung diseases; depression; anxiety; addictions; obsessive compulsive disorder; affective neurosis/disorder; depressive neurosis/disorder; anxiety neurosis; dysthymic disorder; behaviour disorder; mood disorder; sexual dysfunction; psychosexual dysfunction; sex disorder; sexual disorder; schizophrenia; manic depression; delerium; dementia; bulimia and hypopituit
  • the compounds of formula (I) or pharmaceutically acceptable derivatives thereof are also useful in the treatment of stroke, particularly ischaemic or haemorrhagic stroke. Furthermore the compounds of formula (I) or pharmaceutically acceptable derivatives thereof are also useful in blocking the emetic response.
  • the compounds of formula (T) and their pharmaceutically acceptable derivatives are particularly useful for the treatment of obesity, including obesity associated with Type 2 diabetes, sleep disorders, stroke and blocking the emetic response for example nausea and vomiting.
  • diseases or disorders which may be treated in accordance with the invention include disturbed biological and circadian rhythms; adrenohypophysis disease; hypophysis disease; hypophysis tumor / adenoma; adrenohypophysis hypofunction; functional or psychogenic amenorrhea; adrenohypophysis hyperfunction; migraine; hyperalgesia; pain; enhanced or exaggerated sensitivity to pain such as hyperalgesia, causalgia and allodynia; acute pain; burn pain; atypical facial pain; neuropathic pain; back pain; complex regional pain syndromes I and II; arthritic pain; sports injury pain; pain related to infection e.g.
  • HIV, post-polio syndrome and post-he ⁇ etic neuralgia phantom limb pain; labour pain; cancer pain; post-chemotherapy pain; post-stroke pain; post-operative pain; neuralgia; and tolerance to narcotics or withdrawal from narcotics.
  • the invention also provides a method of treating or preventing diseases or disorders where an antagonist of a human orexin receptor is required, which comprises administering to a subject in need thereof an effective amount of a compound of formula (T), or a pharmaceutically acceptable derivative thereof.
  • the invention also provides a compound of formula (I), or a pharmaceutically acceptable derivative thereof, for use in the treatment or prophylaxis of diseases or disorders where an antagonist of a human orexin receptor is required.
  • the invention also provides the use of a compound of formula (I), or a pharmaceutically acceptable derivative thereof, in the manufacture of a medicament for the treatment or prophylaxis of diseases or disorders where an antagonist of a human orexin receptor is required.
  • the compounds of the invention are usually administered as a pharmaceutical composition.
  • the invention also provides a pharmaceutical composition comprising a compound of formula (I), or a pharmaceutically acceptable derivative thereof, and a pharmaceutically acceptable carrier.
  • the compounds of formula (T) and their pharmaceutically acceptable derivatives may be administered by any convenient method, e.g. by oral, parenteral, buccal, sublingual, nasal, rectal or transdermal administration, and the pharmaceutical compositions adapted accordingly.
  • the compounds of formula (T) and their pharmaceutically acceptable derivatives which are active when given orally can be formulated as liquids or solids, e.g. as syrups, suspensions, emulsions, tablets, capsules or lozenges.
  • a liquid formulation will generally consist of a suspension or solution of the active ingredient in a suitable liquid carrier(s) e.g. an aqueous solvent such as water, ethanol or glycerine, or a non-aqueous solvent, such as polyethylene glycol or an oil.
  • the formulation may also contain a suspending agent, preservative, flavouring and/or colouring agent.
  • a composition in the form of a tablet can be prepared using any suitable pharmaceutical carrier(s) routinely used for preparing solid formulations, such as magnesium stearate, starch, lactose, sucrose and cellulose.
  • a composition in the form of a capsule can be prepared using routine encapsulation procedures, e.g. pellets containing the active ingredient can be prepared using standard carriers and then filled into a hard gelatin capsule; alternatively a dispersion or suspension can be prepared using any suitable pharmaceutical carrier(s), e.g. aqueous gums, celluloses, silicates or oils and the dispersion or suspension then filled into a soft gelatin capsule.
  • suitable pharmaceutical carrier(s) e.g. aqueous gums, celluloses, silicates or oils
  • Typical parenteral compositions consist of a solution or suspension of the active ingredient in a sterile aqueous carrier or parenterally acceptable oil, e.g. polyethylene glycol, polyvinyl pyrrolidone, lecithin, arachis oil or sesame oil.
  • a sterile aqueous carrier or parenterally acceptable oil e.g. polyethylene glycol, polyvinyl pyrrolidone, lecithin, arachis oil or sesame oil.
  • the solution can be lyophilised and then reconstituted with a suitable solvent just prior to administration.
  • compositions for nasal administration may conveniently be formulated as aerosols, drops, gels and powders.
  • Aerosol formulations typically comprise a solution or fine suspension of the active ingredient in a pharmaceutically acceptable aqueous or non-aqueous solvent and are usually presented in single or multidose quantities in sterile form in a sealed container which can take the form of a cartridge or refill for use with an atomising device.
  • the sealed container may be a disposable dispensing device such as a single dose nasal inhaler or an aerosol dispenser fitted with a metering valve.
  • the dosage form comprises an aerosol dispenser, it will contain a propellant which can be a compressed gas e.g. air, or an organic propellant such as a fluorochloro- hydrocarbon or hydrofluorocarbon. Aerosol dosage forms can also take the form of pump- atomisers.
  • compositions suitable for buccal or sublingual administration include tablets, lozenges and pastilles where the active ingredient is formulated with a carrier such as sugar and acacia, tragacanth, or gelatin and glycerin.
  • Compositions for rectal administration are conveniently in the form of suppositories containing a conventional suppository base such as cocoa butter.
  • compositions suitable for transdermal administration include ointments, gels and patches.
  • the composition is in unit dose form such as a tablet, capsule or ampoule.
  • the dose of the compound of formula (I), or a pharmaceutically acceptable derivative thereof, used in the treatment or prophylaxis of the abovementioned disorders or diseases will vary in the usual way with the particular disorder or disease being treated, the weight of the subject and other similar factors.
  • suitable unit doses may be 0.05 to 1000 mg, more suitably 0.05 to 500 mg.
  • Unit doses may be administered more than once a day for example two or three times a day, so that the total daily dosage is in the range of about 0.01 to 100 mg/kg; and such therapy may extend for a number of weeks or months.
  • the above figures are calculated as the parent compound of formula (I).
  • Human orexin-A has the amino acid sequence: pyroGlu Pro Leu Pro Asp Cys Cys Arg Gin Lys Thr Cys Ser Cys Arg Leu 1 5 10 15
  • Orexin-A can be employed in screening procedures for compounds which inhibit the ligand's activation of the orexin-1 receptor.
  • screening procedures involve providing appropriate cells which express the orexin-1 receptor on their surface.
  • Such cells include cells from mammals, yeast, Drosophila or K coli.
  • a polynucleotide encoding the orexin-1 receptor is used to transfect cells to express the receptor.
  • the expressed receptor is then contacted with a test compound and an orexin- 1 receptor ligand to observe inhibition of a functional response.
  • One such screening procedure involves the use of melanophores which are transfected to express the orexin-1 receptor, as described in WO 92/01810.
  • Another screening procedure involves introducing RNA encoding the orexin-1 receptor into Xenopus oocytes to transiently express the receptor.
  • the receptor oocytes are then contacted with a receptor ligand and a test compound, followed by detection of inhibition of a signal in the case of screening for compounds which are thought to inhibit activation of the receptor by the ligand.
  • Another method involves screening for compounds which inhibit activation of the receptor by determining inhibition of binding of a labelled orexin-1 receptor ligand to cells which have the receptor on their surface.
  • This method involves transfecting a eukaryotic cell with DNA encoding the orexin-1 receptor such that the cell expresses the receptor on its surface and contacting the cell or cell membrane preparation with a compound in the presence of a labelled form of an orexin-1 receptor ligand.
  • the ligand may contain a radioactive label. The amount oflabelled ligand bound to the receptors is measured, e.g. by measuring radioactivity.
  • Yet another screening technique involves the use of FLIPR equipment for high throughput screening of test compounds that inhibit mobilisation of intracellular calcium ions, or other ions, by affecting the interaction of an orexin-1 receptor ligand with the orexin-1 receptor.
  • All publications, including but not limited to patents and patent applications, cited in this specification are herein inco ⁇ orated by reference as if each individual publication were specifically and individually indicated to be inco ⁇ orated by reference herein as though fully set forth.
  • the following Examples illustrate the preparation of pharmacologically active compounds of the invention.
  • the Descriptions Dl-Dl 1 illustrate the preparation of intermediates to compounds of the invention.
  • HATU O-(7-azabenzotriazol- 1 -yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate
  • 3-Methoxycarbonylmethylpiperazine-l-carboxylic acid tert-butyl ester (0.900g), HATU (1.396g), diisopropylethylamine (1.95 ml) and 5-(4-fluorophenyl)-2-methylthiazole-4-carboxylic acid (1.06g) were dissolved in dry dimethylformamide (10ml) and stirred at room temperature for 16 h. The solvent was then evaporated and the residue partitioned between dichloromethane and brine.
  • DI (0.500g) was dissolved in dry dichloromethane (20ml) and cooled to -20°C under an atmosphere of argon.
  • Diphenylphosphinic chloride (0.256g) and diisopropylethylamine (0.184ml) were added to the stirred solution and stirring was continued at -20°C for 1 h.
  • the reaction was then partitioned between dichloromethane and water, and the organic solution washed with sodium bicarbonate solution, dried (MgSO 4 ) and evaporated.
  • the orexin-1 receptor antagonist activity of the compounds of formula (I) was determined in accordance with the following experimental method.
  • HEK293 cells expressing the human orexin-1 receptor were grown in cell medium (MEM medium with Earl's salts) containing 2 mM L-Glutamine, 0.4 mg/mL G418 Sulphate from GIBCO BRL and 10% heat inactivated fetal calf serum from Gibco BRL.
  • the cells were seeded at 20,000 cells/100 ⁇ l/well into 96-well black clear bottom sterile plates from Costar which had been pre- coated with 10 ⁇ g/well of poly-L-lysine from SIGMA. The seeded plates were incubated overnight at37°C in 5% CO 2 .
  • Agonists were prepared as 1 mM stocks in wate ⁇ DMSO (1:1). EC 50 values (the concentration required to produce 50% maximal response) were estimated using 1 lx half log unit dilutions (Biomek 2000, Beckman) in Tyrode's buffer containing probenecid (10 mM HEPES with 145mM NaCl, 1 OmM glucose, 2.5 mM KC1, 1.5 mM CaCl 2 , 1.2 mM MgCl 2 and 2.5mM probenecid; pH7.4). Antagonists were prepared as 10 mM stocks in DMSO (100%).
  • Antagonist IC 50 values (the concentration of compound needed to inhibit 50% of the agonist response) were determined against 3.0 nM human orexin-A using 1 lx half log unit dilutions in Tyrode's buffer containing 10% DMSO and probenecid. On the day of assay 50 ⁇ l of cell medium containing probenecid (Sigma) and Fluo3AM
  • K b IC 5 o/(l+([3/EC 50 ]) where EC 50 was the potency of human orexin-A determined in the assay (in nM terms) and
  • IC 5 o is expressed in molar terms.
  • the orexin-2 receptor antagonist activity of the compounds of formula ( ⁇ ) was determined in accordance with the following experimental method.
  • CHO-DG44 cells expressing the human orexin-2 receptor were grown in cell medium (MEM medium with Earl's salts) containing 2 mM L-Glutamine, 0.4 mg/mL G418 Sulphate from GDBCO BRL and 10% heat inactivated fetal calf serum from Gibco BRL.
  • the cells were seeded at 20,000 cells/100 ⁇ l/well into 96-well black clear bottom sterile plates from Costar which had been pre-coated with 10 ⁇ g/well of poly-L-lysine from SIGMA. The seeded plates were incubated overnight at 37C in 5% CO 2 .
  • Agonists were prepared as 1 mM stocks in wate ⁇ DMSO (1:1).
  • EC 5 0 values (the concentration required to produce 50% maximal response) were estimated using 1 lx half log unit dilutions (Biomek 2000, Beckman) in Tyrode's buffer containing probenecid (10 mM HEPES with 145mM NaCl, lOmM glucose, 2.5 mM KC1, 1.5 mM CaCl 2 , 1.2 mM MgCl 2 and 2.5mM probenecid; pH7.4). Antagonists were prepared as 10 mM stocks in DMSO (100%).
  • Antagonist IC 50 values (the concentration of compound needed to inhibit 50% of the agonist response) were determined against 10.0 nM human orexin-A using llx half log unit dilutions in Tyrode's buffer containing 10% DMSO and probenecid.
  • Antagonist or buffer (25 ⁇ l) was added (Quadra) the cell plates gently shaken and incubated at 37C in 5% CO 2 for 30 min. Cell plates were then transferred to the Fluorescent Imaging Plate Reader (FLIPR, Molecular Devices) instrument. Prior to drug addition a single image of the cell plate was taken (signal test), to evaluate dye loading consistency. The run protocol used 60 images taken at 1 second intervals followed by a further 24 images at 5 second intervals. Agonists were added (by the FLIPR) after 20 sec (during continuous reading). From each well, peak fluorescence was determined over the whole assay period and the mean of readings 1-19 inclusive was subtracted from this figure.
  • FLIPR Fluorescent Imaging Plate Reader

Abstract

L'invention se rapporte à des dérivés de pipérazine et à leur utilisation en tant que produits pharmaceutiques.
PCT/GB2002/005676 2001-12-19 2002-12-13 Composes de piperazine et leur utilisation pharmaceutique WO2003051873A1 (fr)

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Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004026866A1 (fr) * 2002-09-18 2004-04-01 Glaxo Group Limited Amines cycliques n-aroyle utilisees comme antagonistes du recepteur d'orexine
US7279578B2 (en) 2002-10-11 2007-10-09 Actelion Pharmaceuticals Ltd. Sulfonylamino-acetic acid derivatives
WO2008008517A2 (fr) 2006-07-14 2008-01-17 Merck & Co., Inc. Diazépans pontés antagonistes du récepteur de l'oréxine
WO2008069997A1 (fr) 2006-12-01 2008-06-12 Merck & Co., Inc. Antagonistes des récepteurs de l'orexine sous forme de composés de diazépane substitués
WO2008143856A1 (fr) 2007-05-18 2008-11-27 Merck & Co., Inc. Antagonistes des récepteurs de l'oréxine à diazépam à pont oxo
WO2008147518A1 (fr) 2007-05-23 2008-12-04 Merck & Co., Inc. Antagonistes de récepteur d'orexine pipéridyl pipéridine
WO2008150364A1 (fr) 2007-05-23 2008-12-11 Merck & Co., Inc. Antagonistes du récepteur de la cyclopropylpyrrolidine orexine
US7501395B2 (en) 2005-04-25 2009-03-10 Eisai R & D Management Co., Ltd. Method of screening for antianxiety drugs
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US7622471B2 (en) 2003-02-07 2009-11-24 Daiichi Pharmaceutical Co., Ltd. Pyrazole derivatives having a pyridazine and pyridine functionality
JP2010504957A (ja) * 2006-09-29 2010-02-18 アクテリオン ファーマシューティカルズ リミテッド ３−アザ−ビシクロ［３．１．０］ヘキサン誘導体
US7763638B2 (en) 2004-03-01 2010-07-27 Actelion Pharmaceuticals Ltd. Substituted 1,2,3,4-tetrahydroisoquinoline derivatives
EP2275421A1 (fr) 2009-07-15 2011-01-19 Rottapharm S.p.A. Composés spiro-aminés utiles pour le traitement de, entre autres, troubles du sommeil et de la toxicomanie
US8133901B2 (en) 2006-12-01 2012-03-13 Actelion Pharmaceuticals Ltd. 3-heteroaryl (amino or amido)-1-(biphenyl or phenylthiazolyl) carbonylpiperidine derivatives as orexin receptor inhibitors
US8236801B2 (en) 2008-02-21 2012-08-07 Actelion Pharmaceuticals Ltd. 2-aza-bicyclo[2.2.1]heptane derivatives
US8236964B2 (en) 2007-03-26 2012-08-07 Actelion Pharmaceuticals Ltd. Thiazolidine derivatives as orexin receptor antagonists
RU2460732C2 (ru) * 2006-12-28 2012-09-10 Актелион Фармасьютиклз Лтд Производные 2-аза-бицикло[3.1.0.]гексана в качестве антагонистов рецептора орексина
US8288411B2 (en) 2007-09-24 2012-10-16 Actelion Pharmaceuticals Ltd. Pyrrolidines and piperidines as orexin receptor antagonists
US8288429B2 (en) 2007-07-27 2012-10-16 Actelion Pharmaceuticals Ltd. 2-aza-bicyclo[3.3.0]octane derivatives
WO2013182972A1 (fr) 2012-06-04 2013-12-12 Actelion Pharmaceuticals Ltd Dérivés de benzimidazole-proline
US8685961B2 (en) 2006-03-29 2014-04-01 Merck Sharp & Dohme Corp. Diazepan orexin receptor antagonists
WO2014057435A1 (fr) 2012-10-10 2014-04-17 Actelion Pharmaceuticals Ltd Antagonistes des récepteurs de l'orexine, qui sont des dérivés [ortho bi (hetero )aryl]-[2-(meta bi (hetero )aryl)-pyrrolidin-1-yl]-methanone
WO2014141065A1 (fr) 2013-03-12 2014-09-18 Actelion Pharmaceuticals Ltd Dérivés d'amide d'azétidine en tant qu'antagonistes des récepteurs d'oréxine
WO2015083070A1 (fr) 2013-12-03 2015-06-11 Actelion Pharmaceuticals Ltd Forme cristalline de (s)-(2-(6-chloro-7-methyl-1h-benzo[d]imidazol-2-yl)-2-methylpyrrolidin-1 -yl)(5-methoxy-2-(2h-1,2,3-triazol-2-yl)phenyl)methanone et utilisation de celle-ci en tant qu'antagonistes des recepteurs de l'orexine
WO2015083071A1 (fr) 2013-12-03 2015-06-11 Actelion Pharmaceuticals Ltd Forme de sel cristalline de (s)-(2-(6-chloro-7-méthyl-1 h-benzo[d]imidazol- 2-yl)-2-méthylpyrrolidin-1-yl)(5-méthoxy-2-(2h-1,2,3-triazol-2-yl)phényl)méthanone comme antagoniste des récepteurs à l'oréxine
WO2015083094A1 (fr) 2013-12-04 2015-06-11 Actelion Pharmaceuticals Ltd Utilisation de dérivés de benzimidazole-proline
US9156819B2 (en) 2011-10-19 2015-10-13 Merck Sharp & Dohme Corp. 2-pyridyloxy-4-nitrile orexin receptor antagonists
US9440982B2 (en) 2012-02-07 2016-09-13 Eolas Therapeutics, Inc. Substituted prolines/piperidines as orexin receptor antagonists
US9499517B2 (en) 2012-02-07 2016-11-22 Eolas Therapeutics, Inc. Substituted prolines / piperidines as orexin receptor antagonists
WO2017194548A1 (fr) 2016-05-10 2017-11-16 INSERM (Institut National de la Santé et de la Recherche Médicale) Méthodes et compositions pharmaceutiques pour le traitement de maladies inflammatoires auto-immunes
US10221170B2 (en) 2014-08-13 2019-03-05 Eolas Therapeutics, Inc. Difluoropyrrolidines as orexin receptor modulators
WO2020007964A1 (fr) 2018-07-05 2020-01-09 Idorsia Pharmaceuticals Ltd Dérivés de 2-(2-azabicyclo [3.1.0] hexan-1-yl)-1h-benzimidazole
WO2020099511A1 (fr) 2018-11-14 2020-05-22 Idorsia Pharmaceuticals Ltd Dérivés de benzimidazole-2-méthyl-morpholine
US10894789B2 (en) 2016-02-12 2021-01-19 Astrazeneca Ab Halo-substituted piperidines as orexin receptor modulators
WO2023218023A1 (fr) 2022-05-13 2023-11-16 Idorsia Pharmaceuticals Ltd Dérives d'hydrazine-n-carboxamide cycliques substitués par thiazoloaryl-méthyle

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EP0343900A2 (fr) * 1988-05-23 1989-11-29 Glaxo Group Limited Composés pipéraziniques

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EP0343900A2 (fr) * 1988-05-23 1989-11-29 Glaxo Group Limited Composés pipéraziniques

Cited By (53)

* Cited by examiner, † Cited by third party
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WO2004026866A1 (fr) * 2002-09-18 2004-04-01 Glaxo Group Limited Amines cycliques n-aroyle utilisees comme antagonistes du recepteur d'orexine
US7279578B2 (en) 2002-10-11 2007-10-09 Actelion Pharmaceuticals Ltd. Sulfonylamino-acetic acid derivatives
US7435815B2 (en) 2002-10-11 2008-10-14 Actelion Pharmaceuticals Ltd. Sulfonylamino-acetic acid derivatives
US7622471B2 (en) 2003-02-07 2009-11-24 Daiichi Pharmaceutical Co., Ltd. Pyrazole derivatives having a pyridazine and pyridine functionality
US7538109B2 (en) 2003-04-28 2009-05-26 Actelion Pharmaceuticals Ltd Quinoxalin-3-one derivatives as orexin receptor antagonists
US7763638B2 (en) 2004-03-01 2010-07-27 Actelion Pharmaceuticals Ltd. Substituted 1,2,3,4-tetrahydroisoquinoline derivatives
US7501395B2 (en) 2005-04-25 2009-03-10 Eisai R & D Management Co., Ltd. Method of screening for antianxiety drugs
US8685961B2 (en) 2006-03-29 2014-04-01 Merck Sharp & Dohme Corp. Diazepan orexin receptor antagonists
WO2008008517A2 (fr) 2006-07-14 2008-01-17 Merck & Co., Inc. Diazépans pontés antagonistes du récepteur de l'oréxine
JP2010504957A (ja) * 2006-09-29 2010-02-18 アクテリオン ファーマシューティカルズ リミテッド ３−アザ−ビシクロ［３．１．０］ヘキサン誘導体
WO2008069997A1 (fr) 2006-12-01 2008-06-12 Merck & Co., Inc. Antagonistes des récepteurs de l'orexine sous forme de composés de diazépane substitués
US7951797B2 (en) 2006-12-01 2011-05-31 Merck Sharp & Dohme Corp. Substituted diazepan orexin receptor antagonists
EP2392572A1 (fr) 2006-12-01 2011-12-07 Merck Sharp & Dohme Corp. Antagonistes des récepteurs de l'orexine sous forme de composés de diazépane substitués
US8133901B2 (en) 2006-12-01 2012-03-13 Actelion Pharmaceuticals Ltd. 3-heteroaryl (amino or amido)-1-(biphenyl or phenylthiazolyl) carbonylpiperidine derivatives as orexin receptor inhibitors
US8288435B2 (en) 2006-12-28 2012-10-16 Actelion Pharmaceuticals Ltd. 2-aza-bicyclo[3.1.0]hexane derivatives as orexin receptor antagonists
RU2460732C2 (ru) * 2006-12-28 2012-09-10 Актелион Фармасьютиклз Лтд Производные 2-аза-бицикло[3.1.0.]гексана в качестве антагонистов рецептора орексина
US8236964B2 (en) 2007-03-26 2012-08-07 Actelion Pharmaceuticals Ltd. Thiazolidine derivatives as orexin receptor antagonists
WO2008143856A1 (fr) 2007-05-18 2008-11-27 Merck & Co., Inc. Antagonistes des récepteurs de l'oréxine à diazépam à pont oxo
WO2008147518A1 (fr) 2007-05-23 2008-12-04 Merck & Co., Inc. Antagonistes de récepteur d'orexine pipéridyl pipéridine
US8242121B2 (en) 2007-05-23 2012-08-14 Merck Sharp & Dohme Corp. Pyridyl piperidine orexin receptor antagonists
WO2008150364A1 (fr) 2007-05-23 2008-12-11 Merck & Co., Inc. Antagonistes du récepteur de la cyclopropylpyrrolidine orexine
US8569311B2 (en) 2007-05-23 2013-10-29 Merch Sharp & Dohme Corp. Pyridyl piperidine orexin receptor antagonists
US8288429B2 (en) 2007-07-27 2012-10-16 Actelion Pharmaceuticals Ltd. 2-aza-bicyclo[3.3.0]octane derivatives
US8288411B2 (en) 2007-09-24 2012-10-16 Actelion Pharmaceuticals Ltd. Pyrrolidines and piperidines as orexin receptor antagonists
US8236801B2 (en) 2008-02-21 2012-08-07 Actelion Pharmaceuticals Ltd. 2-aza-bicyclo[2.2.1]heptane derivatives
EP2275421A1 (fr) 2009-07-15 2011-01-19 Rottapharm S.p.A. Composés spiro-aminés utiles pour le traitement de, entre autres, troubles du sommeil et de la toxicomanie
WO2011006960A1 (fr) 2009-07-15 2011-01-20 Rottapharm S.P.A. Composés spiro-aminiques convenant au traitement, notamment, des troubles du sommeil et de la pharmacodépendance
US9156819B2 (en) 2011-10-19 2015-10-13 Merck Sharp & Dohme Corp. 2-pyridyloxy-4-nitrile orexin receptor antagonists
US9896452B2 (en) 2012-02-07 2018-02-20 Eolas Therapeutics, Inc. Substituted prolines/piperidines as orexin receptor antagonists
US9499517B2 (en) 2012-02-07 2016-11-22 Eolas Therapeutics, Inc. Substituted prolines / piperidines as orexin receptor antagonists
US9440982B2 (en) 2012-02-07 2016-09-13 Eolas Therapeutics, Inc. Substituted prolines/piperidines as orexin receptor antagonists
WO2013182972A1 (fr) 2012-06-04 2013-12-12 Actelion Pharmaceuticals Ltd Dérivés de benzimidazole-proline
US10329287B2 (en) 2012-06-04 2019-06-25 Idorsia Pharmaceuticals Ltd Benzimidazole-proline derivatives
US11040966B2 (en) 2012-06-04 2021-06-22 Idorsia Pharmaceuticals Ltd Benzimidazole-proline derivatives
US9732075B2 (en) 2012-06-04 2017-08-15 Idorsia Pharmaceuticals Ltd Benzimidazole-proline derivatives
US9493446B2 (en) 2012-10-10 2016-11-15 Actelion Pharmaceuticals Ltd. Orexin receptor antagonists which are [ortho bi-(hetero-)aryl]-[2-(meta bi-(hetero-)aryl)-pyrrolidin-1-yl]-methanone derivatives
WO2014057435A1 (fr) 2012-10-10 2014-04-17 Actelion Pharmaceuticals Ltd Antagonistes des récepteurs de l'orexine, qui sont des dérivés [ortho bi (hetero )aryl]-[2-(meta bi (hetero )aryl)-pyrrolidin-1-yl]-methanone
US9403813B2 (en) 2013-03-12 2016-08-02 Actelion Pharmaceuticals Ltd. Azetidine amide derivatives as orexin receptor antagonists
WO2014141065A1 (fr) 2013-03-12 2014-09-18 Actelion Pharmaceuticals Ltd Dérivés d'amide d'azétidine en tant qu'antagonistes des récepteurs d'oréxine
US10023560B2 (en) 2013-12-03 2018-07-17 Idorsia Pharmaceuticals Ltd Crystalline salt form of (S)-(2-(6 chloro-7-methyl-1H-benzo[d]imidazol-2-yl)-2-methylpyrrolidin-1-yl)(5-methoxy-2-(2H-1,2,3-triazol-2-yl)phenyl)methanone as orexin receptor antagonist
WO2015083071A1 (fr) 2013-12-03 2015-06-11 Actelion Pharmaceuticals Ltd Forme de sel cristalline de (s)-(2-(6-chloro-7-méthyl-1 h-benzo[d]imidazol- 2-yl)-2-méthylpyrrolidin-1-yl)(5-méthoxy-2-(2h-1,2,3-triazol-2-yl)phényl)méthanone comme antagoniste des récepteurs à l'oréxine
US9790208B2 (en) 2013-12-03 2017-10-17 Idorsia Pharmaceuticals Ltd Crystalline salt form of (S)-(2-(6-chloro-7-methyl-1H-benzo[d]imidazol-2-yl)-2-methylpyrrolidin-1-yl)(5-methoxy-2-(2H-1,2,3-triazol-2-yl)phenyl)methanone as orexin receptor antagonist
US9914720B2 (en) 2013-12-03 2018-03-13 Idorsia Pharmaceuticals Ltd Crystalline form of (S)-(2-(6-chloro-7-methyl-1H-benzo[D]imidazol-2-yl)-2-methylpyrrolidin-1-yl)(5-methoxy-2-(2H-1,2,3-triazol-2-yl)phenyl)methanone and its use as orexin receptor antagonists
WO2015083070A1 (fr) 2013-12-03 2015-06-11 Actelion Pharmaceuticals Ltd Forme cristalline de (s)-(2-(6-chloro-7-methyl-1h-benzo[d]imidazol-2-yl)-2-methylpyrrolidin-1 -yl)(5-methoxy-2-(2h-1,2,3-triazol-2-yl)phenyl)methanone et utilisation de celle-ci en tant qu'antagonistes des recepteurs de l'orexine
US9914721B2 (en) 2013-12-04 2018-03-13 Idorsia Pharmaceuticals Ltd Use of benzimidazole-proline derivatives
WO2015083094A1 (fr) 2013-12-04 2015-06-11 Actelion Pharmaceuticals Ltd Utilisation de dérivés de benzimidazole-proline
US10221170B2 (en) 2014-08-13 2019-03-05 Eolas Therapeutics, Inc. Difluoropyrrolidines as orexin receptor modulators
US10894789B2 (en) 2016-02-12 2021-01-19 Astrazeneca Ab Halo-substituted piperidines as orexin receptor modulators
US11434236B2 (en) 2016-02-12 2022-09-06 Astrazeneca Ab Halo-substituted piperidines as orexin receptor modulators
WO2017194548A1 (fr) 2016-05-10 2017-11-16 INSERM (Institut National de la Santé et de la Recherche Médicale) Méthodes et compositions pharmaceutiques pour le traitement de maladies inflammatoires auto-immunes
WO2020007964A1 (fr) 2018-07-05 2020-01-09 Idorsia Pharmaceuticals Ltd Dérivés de 2-(2-azabicyclo [3.1.0] hexan-1-yl)-1h-benzimidazole
WO2020099511A1 (fr) 2018-11-14 2020-05-22 Idorsia Pharmaceuticals Ltd Dérivés de benzimidazole-2-méthyl-morpholine
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