WO2005058299A1 - Derives de phenethanolamine destines au traitement de maladies respiratoires - Google Patents

Derives de phenethanolamine destines au traitement de maladies respiratoires Download PDF

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Publication number
WO2005058299A1
WO2005058299A1 PCT/EP2004/013998 EP2004013998W WO2005058299A1 WO 2005058299 A1 WO2005058299 A1 WO 2005058299A1 EP 2004013998 W EP2004013998 W EP 2004013998W WO 2005058299 A1 WO2005058299 A1 WO 2005058299A1
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formula
compound
alkyl
hydrogen
compounds
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PCT/EP2004/013998
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English (en)
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Diane Mary Coe
Brian Cox
Brian Edgar Looker
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Glaxo Group Limited
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Publication of WO2005058299A1 publication Critical patent/WO2005058299A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom 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
    • C07D213/62—Oxygen or sulfur atoms
    • C07D213/70—Sulfur atoms
    • C07D213/71—Sulfur atoms to which a second hetero atom is attached
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P11/00—Drugs for disorders of the respiratory system
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C311/00—Amides of sulfonic acids, i.e. compounds having singly-bound oxygen atoms of sulfo groups replaced by nitrogen atoms, not being part of nitro or nitroso groups
    • C07C311/22—Sulfonamides, the carbon skeleton of the acid part being further substituted by singly-bound oxygen atoms
    • C07C311/29—Sulfonamides, the carbon skeleton of the acid part being further substituted by singly-bound oxygen atoms having the sulfur atom of at least one of the sulfonamide groups bound to a carbon atom of a six-membered aromatic ring
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
    • C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
    • C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
    • C07D333/26—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom 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
    • C07D333/30—Hetero atoms other than halogen
    • C07D333/34—Sulfur atoms

Definitions

  • the present invention is concerned with phenethanolamine derivatives, processes for their preparation, compositions containing them and their use in medicine, particularly in the prophylaxis and treatment of respiratory diseases.
  • phenethanolamine compounds are known in the art as having selective stimulant action at ⁇ 2 -adrenoreceptors and therefore having utility in the treatment of bronchial asthma and related disorders.
  • GB 2 140 800 describes phenethanolamine compounds including 4-hydroxy- ⁇ 1 -[[[6-(4-phenylbutoxy)hexyl]amino]methyl]-1,3- benzenedimethanol 1-hydroxy-2-naphthalenecarboxylate (salmeterol xinafoate) which is now used clinically in the treatment of such medical conditions.
  • n is an integer of from 3 to 11 , preferably from 3 to 7, with the proviso that the sum of m + n is from 5 to 19, preferably 5 to 12;
  • R 1 is -XSO 2 NR 6 R 7 ;
  • X is -(CH 2 ) P - or C 2-6 alkenylene;
  • p is an integer from 0 to 6, preferably 0 to 4;
  • R 6 and R 7 are independently selected from hydrogen, C 1-6 alkyl, C 3-7 cycloalkyl, -CONR 8 R 9 , phenyl and phenyl(C 1-4 alkyl)-,
  • R 6 and R 7 are each independently optionally substituted by 1 or 2 groups independently selected from halo, C 1-6 alkyl, C 1-6 alkoxy, hydroxy-substituted C 1-6 alkoxy,
  • R 8 and R 9 are independently selected from hydrogen, C 1-6 alkyl, C 3-7 cycloalkyl, phenyl and phenyl(C ⁇ . 6 alkyl)-;
  • R 2 and R 3 are independently selected from hydrogen, C 1-6 alkyl, C 1-6 alkoxy, halo, phenyl and C
  • R 4 and R 5 are independently selected from hydrogen and C M alkyl with the proviso that the total number of carbon atoms in R 4 and R 5 is not more than 4;
  • Ar 1 is a group selected from
  • R 11 represents hydrogen, halogen, -(CH 2 ) q OR 14 , -NR 1 C(O)R 15 , -NR 14 SO 2 R 15 , -SO 2 NR 14 R 15 , -NR 1 R 15 , -OC(O)R 16 or -OC(O)NR 14 R 15 ,
  • R 10 represents hydrogen, halogen or C 1-4 alkyl
  • R 11 represents -NHR 17 and R 10 and -NHR 17 together form a 5- or 6- membered heterocyclic ring;
  • R 1 represents hydrogen, halogen, -OR ⁇ 4 or
  • rV ⁇ represents hydrogen, halogen, haloC 1-4 alkyl, -OR 14 , -NR 14 R 1b -OC(O)R 1 or
  • R 14 and R 15 each independently represents hydrogen or C 1-4 alkyl, or in the groups
  • R 14 and R 15 independently represent hydrogen or C 1-4 alkyl or together with the nitrogen atom to which they are attached form a 5-, 6- or 7- membered nitrogen-containing ring
  • R 16 represents an aryl (eg phenyl or naphthyl) group which may be unsubstituted or substituted by one or more substituents selected from halogen, C 1- alkyl, hydroxy, C 1- alkoxy or halo C 1-4 alkyl;
  • q is zero or an integer from 1 to 4.
  • Ar 2 is a mono- or bicyclic heteroaryl or a bicyclic aryl group.
  • R where 'R 6 and R 7 together with the nitrogen atom to which they are bonded, form a 5-, 6-, or 7- membered nitrogen containing ring'
  • the term "5-, 6-, or 7- membered nitrogen containing ring” means a 5-, 6-, or 7- membered saturated or unsaturated ring which includes the sulfonamide nitrogen atom and optionally 1 or 2 other heteroatoms independently selected from nitrogen, sulphur, and oxygen.
  • Suitable examples of such a ring include piperidinyl, morpholinyl, and piperazinyl.
  • the term "5-, 6-, or 7- membered heterocyclic ring” means a 5-, 6-, or 7- membered fully or partially saturated or unsaturated ring which includes 1 , 2, 3 or 4 heteroatoms independently selected from nitrogen, sulphur, and oxygen.
  • Suitable examples of such a ring include pyrrolyl, furyl, thienyl, pyridinyl, pyrazinyl, pyridazinyl, imidazolyl, tetrazolyl, tetrahydrofuranyl, oxazolyl, thiazolyl, thiadiazolyl, piperidinyl, morpholinyl, and piperazinyl.
  • alkenylene includes both cis and trans structures.
  • X preferably represents (CH 2 ) P wherein p is 0, 1 or 2, or C 2 -alkenylene.
  • R 1 preferably represents -SO 2 NR 6 R 7 wherein R 6 and R 7 are independently selected from hydrogen and C h alky!. More preferably R 1 is -SO 2 NH 2 .
  • R 4 and R 5 are preferably independently selected from hydrogen and methyl, more preferably R 4 and R 5 are both hydrogen.
  • R 2 and R 3 preferably each represent hydrogen.
  • n is suitably 4, 5 or 6 and m is suitably 3, 4, 5 or 6.
  • n is 5 or 6 and m is 3 or 4 such that m + n is 8, 9 or 10, preferably 9.
  • the group Ar 1 is preferably selected from groups (a) and
  • R 1 represents halogen this .
  • R 14 and R 15 preferably each independently represent hydrogen or methyl.
  • R 16 preferably represents substituted phenyl.
  • the integer q preferably represents zero or 1.
  • OR 14 preferably represents OH or -CH 2 OH;
  • -NR 14 C(O)R 15 preferably represents -NHC(O)H;
  • -SO 2 NR 14 R 15 preferably represents -SO 2 NH 2 or -SO 2 NHCH 3 ;
  • -NR 1 R 15 preferably represents -NH 2 ;
  • -OC(O)R 16 preferably represents substituted benzoyloxy eg. -OC(O)-C e H 4 -( p -CH 3 );
  • -OC(O)N R 14 R 15 preferably represents -OC(O)N(CH 3 ) 2 .
  • R 11 represents NHR 17 and together with R 10 forms a 5- or 6- membered heterocyclic ring -NHR 17 -R 10 - preferably represents a group:
  • R 18 is an alkyl, and alkenyl or alkyloxy group
  • alkyl, and alkenyl groups and moieties contain 1 or 2 carbon atoms.
  • Particularly preferred groups (a) and (b) may be selected from the following groups (i) to (xxi):
  • Ar 1 represents a group (i).
  • bicyclic aryl refers to, unless otherwise defined, a bicyclic carbocyclic aromatic ring system containing up to 10 carbon atoms in the ring system, for instance naphthyl.
  • heteroaryl ring and “heteroaryl” refer to, unless otherwise defined, a monocyclic five- to seven- membered heterocyclic aromatic ring containing one or more heteroatoms selected from oxygen, nitrogen and sulfur or a fused bicyclic heterocyclic aromatic ring system containing at least one heteroatom selected from oxygen, nitrogen and sulfur.
  • a monocyclic heteroaryl ring contains 1-3 heteroatoms.
  • the heteroaryl ring has five or six ring atoms.
  • monocyclic heteroaryl rings include, but are not limited to, furyl, thienyl (thiophenyl), pyrrolyl, oxazolyl, thiazolyl, isoxazolyl, isothiazolyl, imidazolyl, pyrazolyl, oxadiazolyl, triazolyl, tetrazolyl, thiadiazolyl, pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl and triazinyl.
  • each ring has five or six ring atoms.
  • fused heterocyclic aromatic rings include, but are not limited to, quinolinyl, isoquinolinyl, quinazolinyl, quinoxalinyl, cinnolinyl, naphthyridinyl, indolyl, indazolyl, pyrrolopyridinyl, benzofuranyl, benzothienyl, benzimidazolyl, benzoxazolyl, benzisoxazolyl, benzothiazolyl, benzisothiazolyl, benzoxadiazolyl and benzothiadiazolyl.
  • the heteroaryl ring may attach to the rest of the molecule through any atom with a free valence.
  • Ar 2 preferably represents a monocyclic heteroaryl eg pyridyl, 2-thiophenyl, 3-thiophenyl or a bicyclic aryl group eg naphthyl.
  • the compounds of formula (I), include an asymmetric centre, namely the carbon atom of the
  • the present invention includes both (S) and (R) enantiomers either in substantially pure form or admixed in any proportions.
  • R 4 and R 5 are different groups
  • the carbon atom to which they are attached is an asymmetric centre and the present invention includes both (S) and (R) enantiomers at this centre either in substantially pure form or admixed in any proportions.
  • Salts and solvates of compounds of formula (I) which are suitable for use in medicine are those wherein the counterion or associated solvent is pharmaceutically acceptable.
  • salts and solvates having non-pharmaceutically acceptable counterions or associated solvents are within the scope of the present invention, for example, for use as intermediates in the preparation of other compounds of formula (1) and their pharmaceutically acceptable salts, solvates, and physiologically functional derivatives.
  • physiologically functional derivative a chemical derivative of a compound of formula (I) having the same physiological function as the free compound of formula (I) for example, by being convertible in the body thereto.
  • physiologically functional derivatives include esters.
  • Suitable salts according to the invention include those formed with both organic and inorganic acids or bases.
  • Pharmaceutically acceptable acid addition salts include those formed from hydrochloric, hydrobromic, sulphuric, citric, tartaric, phosphoric, lactic, pyruvic, acetic, trifluoroacetic, triphenylacetic, sulphamic, sulphanilic, succinic, oxalic, fumaric, maleic, malic, glutamic, aspartic, oxaloacetic, methanesulphonic, ethanesulphonic, arylsulponic (for example p-toluenesulphonic, benzenesulphonic, naphthalenesulphonic or naphthalenedisulphonic), salicylic, glutaric, gluconic, tricarballylic, cinnamic, substituted cinnamic (for example, methyl , methoxy or halo substituted cinna
  • Pharmaceutically acceptable base salts include ammonium salts, alkali metal salts such as those of sodium and potassium, alkaline earth metal salts such as those of calcium and magnesium and salts with organic bases such as dicyclohexyl amine and N-methyl-D-glucamine.
  • esters of the compounds of formula (I) may have a hydroxyl group converted to a C -6 alkyl, aryl, aryl C 1-6 alkyl, or amino acid ester.
  • the compounds of formula (I) are selective ⁇ 2 -adrenoreceptor agonists as demonstrated using functional or reporter gene readout from cell lines transfected with human beta-adrenoreceptors as described below.
  • Compounds according to the present invention also have the potential to combine long duration of effect with rapid onset of action.
  • compounds of formula (I) and their pharmaceutically acceptable salts, solvates, and physiologically functional derivatives have use in the prophylaxis and treatment of clinical conditions for which a selective ⁇ 2 -adrenoreceptor agonist is indicated.
  • Such conditions include diseases associated with reversible airways obstruction such as asthma, chronic obstructive pulmonary diseases (COPD) (e.g. chronic and whez bronchitis, emphysema), respiratory tract infection and upper respiratory tract disease (e.g. rhinitis, including seasonal and allergic rhinitis).
  • COPD chronic obstructive pulmonary diseases
  • rhinitis e.g. chronic and whez bronchitis, emphysema
  • respiratory tract infection e.g. rhinitis, including seasonal and allergic rhinitis.
  • Other conditions which may be treated include premature labour, depression, congestive heart failure, skin diseases (e.g. inflammatory, allergic, psoriatic, and proliferative skin diseases), conditions where lowering peptic acidity is desirable (e.g. peptic and gastric ulceration) and muscle wasting disease.
  • skin diseases e.g. inflammatory, allergic, psoriatic, and proliferative skin diseases
  • conditions where lowering peptic acidity is desirable e.g. peptic and gastric ulceration
  • muscle wasting disease e.g. peptic and gastric ulceration
  • the present invention provides a method for the prophylaxis or treatment of a • clinical condition in a mammal, such as a human, for which a selective ⁇ 2 -adrenoreceptor agonist is indicated, which comprises administration of a therapeutically effective amount of a compound of formula (I), or a pharmaceutically acceptable salt, solvate, or physiologically functional derivative thereof.
  • a mammal such as a human
  • the present invention provides such a method for the prophylaxis or treatment of a disease associated with reversible airways obstruction such as asthma, chronic obstructive pulmonary disease (COPD), respiratory tract infection or upper respiratory tract disease.
  • COPD chronic obstructive pulmonary disease
  • the present invention provides such a method for the prophylaxis or treatment of a clinical condition selected from premature labour, depression, congestive heart failure, skin diseases (e.g. inflammatory, allergic, psoriatic, and proliferative skin diseases), conditions where lowering peptic acidity is desirable (e.g. peptic and gastric ulceration) or muscle wasting disease.
  • a clinical condition selected from premature labour, depression, congestive heart failure, skin diseases (e.g. inflammatory, allergic, psoriatic, and proliferative skin diseases), conditions where lowering peptic acidity is desirable (e.g. peptic and gastric ulceration) or muscle wasting disease.
  • a compound of formula (I), or a pharmaceutically acceptable salt, solvate, or physiologically functional derivative thereof for use in medical therapy, particularly, for use in the prophylaxis or treatment of a clinical condition in a mammal, such as a human, for which a selective ⁇ 2 -adrenoreceptor agonist is indicated.
  • a compound of formula (I), or a pharmaceutically acceptable salt, solvate, or physiologically functional derivative thereof for the prophylaxis or treatment of a disease associated with reversible airways obstruction such as asthma, chronic obstructive pulmonary disease (COPD), respiratory tract infection or upper respiratory tract disease.
  • COPD chronic obstructive pulmonary disease
  • a clinical condition selected from premature labour, depression, congestive heart failure, skin diseases (e.g. inflammatory, allergic, psoriatic, and proliferative skin diseases), conditions where lowering peptic acidity is desirable (e.g. peptic and gastric ulceration) or muscle wasting disease.
  • the present invention also provides the use of a compound of formula (I), or a pharmaceutically acceptable salt, solvate, or physiologically functional derivative thereof in the manufacture of a medicament for the prophylaxis or treatment of a clinical condition for which a selective ⁇ 2 -adrenoreceptor agonist is indicated, for example a disease associated with reversible airways obstruction such as asthma, chronic obstructive pulmonary disease (COPD), respiratory tract infection or upper respiratory tract disease.
  • a disease associated with reversible airways obstruction such as asthma, chronic obstructive pulmonary disease (COPD), respiratory tract infection or upper respiratory tract disease.
  • COPD chronic obstructive pulmonary disease
  • a clinical condition selected from premature labour, depression, congestive heart failure, skin diseases (e.g. inflammatory, allergic, psoriatic, and proliferative skin diseases), conditions where lowering peptic acidity is desirable (e.g. peptic and gastric ulceration) and muscle wasting disease.
  • the amount of a compound of formula (I), or a pharmaceutically acceptable salt, solvate or physiologically functional derivative thereof which is required to achieve a therapeutic effect will, of course, vary with the particular compound, the route of administration, the subject under treatment, and the particular disorder or disease being treated.
  • the compounds of the invention may be administered by inhalation at a dose of from O.OOO ⁇ mg to 10mg, preferably 0.005mg to 0.5mg for example 0.05mg to 0.5mg.
  • the dose range for adult humans is generally from O.OOO ⁇ mg to 10mg per day and preferably 0.01 mg to 1 mg per day, most preferably 0.05 to 0.5mg per day.
  • the present invention further provides a pharmaceutical formulation comprising a compound of formula (I), or a pharmaceutically acceptable salt, solvate, or physiologically functional derivative thereof, and a pharmaceutically acceptable carrier or excipient, and optionally one or more other therapeutic ingredients.
  • active ingredient means a compound of formula (I), or a pharmaceutically acceptable salt, solvate, or physiologically functional derivative thereof.
  • the formulations include those suitable for oral, parenteral (including subcutaneous, intradermal, intramuscular, intravenous and intraarticular), inhalation (including fine particle dusts or mists which may be generated by means of various types of metered dose pressurised aerosols, nebulisers or insufflators), rectal and topical (including dermal, buccal, sublingual and intraocular) administration although the most suitable route may depend upon for example the condition and disorder of the recipient.
  • the formulations may conveniently be presented in unit dosage form and may be prepared by any of the methods well known in the art of pharmacy. All methods include the step of bringing the active ingredient into association with the carrier which constitutes one or more accessory ingredients. In general the formulations are prepared by uniformly and intimately bringing into association the active ingredient with liquid carriers or finely divided solid carriers or both and then, if necessary, shaping the product into the desired formulation.
  • Formulations of the present invention suitable for oral administration may be presented as discrete units such as capsules, cachets or tablets each containing a predetermined amount of the active ingredient; as a powder or granules; as a solution or a suspension in an aqueous liquid or a non-aqueous liquid; or as an oil-in-water liquid emulsion or a water- in-oil liquid emulsion.
  • the active ingredient may also be presented as a bolus, electuary or paste.
  • a tablet may be made by compression or moulding, optionally with one or more accessory ingredients.
  • Compressed tablets may be prepared by compressing in a suitable machine the active ingredient in a free-flowing form such as a powder or granules, optionally mixed with a binder, lubricant, inert diluent, surface active or dispersing agent.
  • Moulded tablets may be made by moulding in a suitable machine a mixture of the powdered compound moistened with an inert liquid diluent.
  • the tablets may optionally be coated or scored and may be formulated so as to provide slow or controlled release of the active ingredient therein.
  • Formulations for parenteral administration include aqueous and non-aqueous sterile injection solutions which may contain anti-oxidants, buffers, bacteriostats and solutes which render the formulation isotonic with the blood of the intended recipient; and aqueous and non-aqueous sterile suspensions which may include suspending agents and thickening agents.
  • the formulations may be presented in unit-dose or multi-dose containers, for example sealed ampoules and vials, and may be stored in a freeze-dried (lyophilised) condition requiring only the addition of the sterile liquid carrier, for example saline or water-for-injection, immediately prior to use.
  • Extemporaneous injection solutions and suspensions may be prepared from sterile powders, granules and tablets of the kind previously described.
  • Dry powder compositions for topical delivery to the lung by inhalation may, for example, be presented in capsules and cartridges of for example gelatine, or blisters of for example laminated aluminium foil, for use in an inhaler or insufflator.
  • Powder blend formulations generally contain a powder mix for inhalation of the compound of the invention and a suitable powder base (carrier/diluent/excipient substance) such as mono-, di or polysaccharides (eg. lactose or starch). Use of lactose is preferred.
  • Each capsule or cartridge may generally contain between 20 ⁇ g-10mg of the compound of formula (I) optionally in combination with another therapeutically active ingredient.
  • the compound of the invention may be presented without excipients.
  • Packaging of the formulation may be suitable for unit dose or multi-dose delivery. In the case of multi-dose delivery, the formulation can be pre-metered (eg as in Diskus, see GB 2242134, US Patent Nos.
  • the Diskus inhalation device comprises an elongate strip formed from a base sheet having a plurality of recesses spaced along its length and a lid sheet hermetically but peelably sealed thereto to define a plurality of containers, each container having therein an inhalable formulation containing a compound of formula (I) preferably combined with lactose.
  • the strip is sufficiently flexible to be wound into a roll.
  • the lid sheet and base sheet will preferably have leading end portions which are not sealed to one another and at least one of the said leading end portions is constructed to be attached to a winding means. Also, preferably the hermetic seal between the base and lid sheets extends over their whole width.
  • the lid sheet may preferably be peeled from the base sheet in a longitudinal direction from a first end of the said base sheet.
  • Spray compositions for topical delivery to the lung by inhalation may for example be formulated as aqueous solutions or suspensions or as aerosols delivered from pressurised packs, such as a metered dose inhaler, with the use of a suitable liquefied propellant.
  • Aerosol compositions suitable for inhalation can be either a suspension or a solution and generally contain the compound of formula (I) optionally in combination with another therapeutically active ingredient and a suitable propellant such as a fluorocarbon or hydrogen-containing chlorofluorocarbon or mixtures thereof, particularly hydrofluoroalkanes, e.g.
  • the aerosol composition may be excipient free or may optionally contain additional formulation excipients well known in the art such as surfactants eg oleic acid or lecithin and cosolvents eg ethanol. Pressurised formulations will generally be retained in a canister (eg an aluminium canister) closed with a valve (eg a metering valve) and fitted into an actuator provided with a mouthpiece.
  • a canister eg an aluminium canister
  • a valve eg a metering valve
  • Medicaments for administration by inhalation desirably have a controlled particle size.
  • the optimum particle size for inhalation into the bronchial system is usually 1-1 O ⁇ m, preferably 2-5 ⁇ m. Particles having a size above 20 ⁇ m are generally too large when inhaled to reach the small airways.
  • the particles of the active ingredient as produced may be size reduced by conventional means eg by micronisation.
  • the desired fraction may be separated out by air classification or sieving.
  • the particles will be crystalline.
  • an excipient such as lactose is employed, generally, the particle size of the excipient will be much greater than the inhaled medicament within the present invention.
  • the excipient is lactose it will typically be present as milled lactose, wherein not more than 85% of lactose particles will have a MMD of 60-90 ⁇ m and not less than 15% will have a MMD of less than 15 ⁇ m.
  • Intranasal sprays may be formulated with aqueous or non-aqueous vehicles with the addition of agents such as thickening agents, buffer salts or acid or alkali to adjust the pH, isotonicity adjusting agents or anti-oxidants.
  • agents such as thickening agents, buffer salts or acid or alkali to adjust the pH, isotonicity adjusting agents or anti-oxidants.
  • Capsules and cartridges or for example gelatin, or blisters of for example laminated aluminium foil, for use in an inhaler or insulator may be formulated containing a powder mix of a compound of the invention and a suitable powder base such as lactose or starch.
  • Solutions for inhalation by nebulation may be formulated with an aqueous vehicle with the addition of agents such as acid or alkali, buffer salts, isotonicity adjusting agents or antimicrobials. They may be sterilised by filtration or heating in an autoclave, or presented as a non-sterile product.
  • Formulations for rectal administration may be presented as a suppository with the usual carriers such as cocoa butter or polyethylene glycol.
  • Formulations for topical administration in the mouth include lozenges comprising the active ingredient in a flavoured basis such as sucrose and acacia or tragacanth, and pastilles comprising the active ingredient in a basis such as gelatin and glycerin or sucrose an acacia.
  • Preferred unit dosage formulations are those containing an effective dose, as hereinbefore recited, or an appropriate fraction thereof, of the active ingredient.
  • the formulations of this invention may include other agents conventional in the art having regard to the type of formulation in question, for example those suitable for oral administration may include flavouring agents.
  • the compounds and pharmaceutical formulations according to the invention may be used in combination with or include one or more other therapeutic agents, for example anti- inflammatory agents, anticholinergic agents (particularly an M 1 ; M 2 , M ⁇ M 2 or M 3 receptor antagonist), other ⁇ 2 -adrenoreceptor agonists, antiinfective agents (e.g. antibiotics, antivirals), or antihistamines.
  • the invention thus provides, in a further aspect, a combination comprising a compound of formula (I) or a pharmaceutically acceptable salt, solvate or physiologically functional derivative thereof together with one or more other therapeutically active agents, for example, an anti-inflammatory agent (for example a corticosteroid or an NSAID), an anticholinergic agent, another ⁇ 2 -adrenoreceptor agonist, an antiinfective agent (e.g. an antibiotic or an antiviral), or an antihistamine.
  • an anti-inflammatory agent for example a corticosteroid or an NSAID
  • an anticholinergic agent for example a corticosteroid or an NSAID
  • an antiinfective agent e.g. an antibiotic or an antiviral
  • Preferred combinations comprising a compound of formula (I) or a pharmaceutically acceptable salt, solvate or physiologically functional derivative thereof together with a corticosteroid, and/or an anticholinergic, and/or a PDE-4 inhibitor.
  • Preferred combinations
  • the other therapeutic ingredient(s) may be used in the form of salts, (e.g. as alkali metal or amine salts or as acid addition salts), or prodrugs, or as esters (e.g. lower alkyl esters), or as solvates (e.g. hydrates) to optimise the activity and/or stability and/or physical characteristics (e.g. solubility) of the therapeutic ingredient.
  • the therapeutic ingredients may be used in optically pure form.
  • Suitable anti-inflammatory agents include corticosteroids and NSAIDs.
  • Suitable corticosteroids which may be used in combination with the compounds of the invention are those oral and inhaled corticosteroids and their pro-drugs which have anti- inflammatory activity. Examples include methyl prednisolone, prednisolone, dexamethasone, fluticasone propionate, 6 ⁇ ,9 ⁇ -difluoro-17 ⁇ -[(2-furanylcarbonyl)oxy]-11 ⁇ - hydroxy-16 ⁇ -methyl-3-oxo-androsta-1 ,4-diene-17 ⁇ -carbothioic acid S-fluoromethyl ester, 6 ⁇ ,9 ⁇ -difluoro-11 ⁇ -hydroxy-16 ⁇ -methyl-3-oxo-17 ⁇ -propionyloxy- androsta-1 ,4-diene-17 ⁇ - carbothioic acid S-(2-oxo-tetrahydro-furan-3S-yl) ester, beclomethasone esters (
  • the 17-propionate ester or the 17,21-dipropionate ester the 17-propionate ester or the 17,21-dipropionate ester
  • budesonide flunisolide
  • mometasone esters e.g. the furoate ester
  • triamcinolone acetonide e.g. the furoate ester
  • rofleponide triamcinolone acetonide
  • ciclesonide butixocort propionate
  • RPR-106541 the 17-propionate ester or the 17,21-dipropionate ester
  • ST-126 the 17-propionate ester or the 17,21-dipropionate ester
  • flunisolide e.g. the furoate ester
  • triamcinolone acetonide e.g. the furoate ester
  • rofleponide triamcinolone acetonide
  • ciclesonide butixocort propionate
  • Preferred corticosteroids include fluticasone propionate, 6 ⁇ ,9 ⁇ -difluoro-11 ⁇ -hydroxy-16 ⁇ -methyl-17 ⁇ -[(4-methyl- 1 ,3-thiazole-5-carbonyl)oxy]-3-oxo-androsta-1 ,4-diene-17 ⁇ -carbothioic acid S- fluoromethyl ester and 6 ⁇ ,9 ⁇ -difluoro-17 ⁇ -[(2-furanylcarbonyl)oxy]-11 ⁇ -hydroxy-16 ⁇ - methyl-3-oxo-androsta-1 ,4-diene-17 ⁇ -carbothioic acid S-fluoromethyl ester, more preferably 6 ⁇ ,9 -difluoro-17 ⁇ -[(2-furanylcarbonyl)oxy]-11 ⁇ -hydroxy-16 ⁇ -methyl-3-oxo- androsta-1 ,4-diene-17 ⁇ -carbothioic acid S-fluoromethyl ester.
  • Suitable NSAIDs include sodium cromoglycate, nedocromil sodium, phosphodiesterase (PDE) inhibitors (e.g. theophylline, PDE4 inhibitors or mixed PDE3/PDE4 inhibitors), leukotriene antagonists, inhibitors of leukotriene synthesis, iNOS inhibitors, tryptase and elastase inhibitors, beta-2 integrin antagonists and adenosine receptor agonists or antagonists (e.g. adenosine 2a agonists), cytokine antagonists (e.g. chemokine antagonists) or inhibitors of cytokine synthesis.
  • PDE phosphodiesterase
  • Suitable other ⁇ 2 -adrenoreceptor agonists include salmeterol (e.g. as the xinafoate), salbutamol (e.g. as the sulphate or the free base), formoterol (e.g. as the fumarate), fenoterol or terbutaline and salts thereof.
  • the PDE4- specific inhibitor useful in this aspect of the invention may be any compound that is known to inhibit the PDE4 enzyme or which is discovered to act as a PDE4 inhibitor, and which are only PDE4 inhibitors, not compounds which inhibit other members of the PDE family as well as PDE4.
  • a PDE4 inhibitor which has an IC50 ratio of about 0.1 or greater as regards the IC50 for the PDE4 catalytic form which binds rolipram with a high affinity divided by the IC50 for the form which binds rolipram with a low affinity.
  • the cAMP catalytic site which binds R and S rolipram with a low affinity is denominated the "low affinity” binding site (LPDE 4) and the other form of this catalytic site which binds rolipram with a high affinity is denominated the "high affinity” binding site (HPDE 4).
  • LPDE 4 low affinity binding site
  • HPDE 4 high affinity binding site
  • the preferred PDE4 inhibitors of use in this invention will be those compounds which have a salutary therapeutic ratio, i.e., compounds which preferentially inhibit cAMP catalytic activity where the enzyme is in the form that binds rolipram with a low affinity, thereby reducing the side effects which apparently are linked to inhibiting the form which binds rolipram with a high affinity.
  • Another way to state this is that the preferred compounds will have an IC 50 ratio of about 0.1 or greater as regards the IC50 for the
  • a further refinement of this standard is that of one wherein the PDE4 inhibitor has an IC50 ratio of about 0.1 or greater; said ratio is the ratio of the IC50 value for competing with the binding of 1 nM of [ ⁇ HjR-rolipram to a form of PDE4 which binds rolipram with a high affinity over the IC50 value for inhibiting the PDE4 catalytic activity of a form which binds rolipram with a low affinity using 1 ⁇ M[ 3 H]-cAMP as the substrate.
  • PDE4 inhibitors which have an IC50 ratio of greater than 0.5, and particularly those compounds having a ratio of greater than 1.0.
  • Preferred compounds are cis 4-cyano-4-(3-cyclopentyloxy-4-methoxyphenyl)cyclohexan-1- carboxylic acid, 2-carbomethoxy-4-cyano-4-(3-cyclopropylmethoxy-4- difluoromethoxyphenyl)cyclohexan-1 -one and c/s-[4-cyano-4-(3-cyclopropylmethoxy-4- difluoromethoxyphenyl)cyclohexan-1-ol]; these are examples of compounds which bind preferentially to the low affinity binding site and which have an IC50 ratio of 0.1 or greater.
  • AWD-12-281 from Asta Medica (Hofgen, N. et al. 15th EFMC Int Symp Med Chem (Sept 6-10, Edinburgh) 1998, Abst P.98; CAS reference No. 247584020-9); a 9-benzyladenine derivative nominated NCS-613 (INSERM); D-4418 from Chiroscience and Schering- Plough; a benzodiazepine PDE4 inhibitor identified as CI-1018 (PD-168787) and attributed to Pfizer; a benzodioxole derivative disclosed by Kyowa Hakko in WO99/16766; K-34 from Kyowa Hakko; V-11294A from Napp (Landells, L.J. et al.
  • PDE-4 and mixed PDE3/PDE4 inhibitors include those listed in WO01/13953, the disclosure of which is hereby incorporated by reference.
  • Suitable anticholinergic agents are those compounds that act as antagonists at the muscarinic receptor, in particular those compounds which are antagonists of the Mi and M 2 receptors.
  • Exemplary compounds include the alkaloids of the belladonna plants as illustrated by the likes of atropine, scopolamine, homatropine, hyoscyamine; these compounds are normally administered as a salt, being tertiary amines.
  • drugs are readily available from a number of commercial sources or can be made or prepared from literature data via, to wit: Atropine - CAS-51-55-8 or CAS-51-48-1 (anhydrous form), atropine sulfate - CAS-5908- 99-6; atropine oxide - CAS-4438-22-6 or its HCl salt - CAS-4574-60-1 and methylatropine nitrate - CAS-52-88-0.
  • Preferred anticholinergics include ipratropium (e.g. as the bromide), sold under the name
  • oxitropium e.g. as the bromide
  • tiotropium e.g. as the bromide
  • methantheline CAS-53-46-3
  • propantheline bromide CAS- 50-34-9
  • anisotropine methyl bromide or Valpin 50 CAS- 80-50-2
  • clidinium bromide Quarzan, CAS-3485-62-9
  • copyrrolate Robot
  • isopropamide iodide CAS-71- 81-8
  • mepenzolate bromide U.S.
  • Suitable antihistamines include any one or more of the numerous antagonists known which inhibit H receptors, and are safe for human use. All are reversible, competitive inhibitors of the interaction of histamine with H receptors. The majority of these inhibitors, mostly first generation antagonists, have a core structure, which can be represented by the following formula:
  • This generalized structure represents three types of antihistamines generally available: ethanolamines, ethylenediamines, and alkylamines.
  • first generation antihistamines include those which can be characterized as based on piperizine and phenothiazines.
  • Second generation antagonists which are non-sedating, have a similar structure-activity relationship in that they retain the core ethylene group (the alkylamines) or mimic the tertiary amine group with piperazine or piperidine.
  • Exemplary antagonists are as follows: Ethanolamines: carbinoxamine maleate, clemastine fumarate, diphenylhydramine hydrochloride, and dimenhydrinate.
  • Ethylenediamines pyrilamine amleate, tripelennamine HCl, and tripelennamine citrate.
  • Alkylamines chloropheniramine and its salts such as the maleate salt, and acrivastine.
  • Piperazines hydroxyzine HCl, hydroxyzine pamoate, cyclizine HCl, cyclizine lactate, meclizine HCl, and cetirizine HCl.
  • Piperidines Astemizole, levocabastine HCl, loratadine or its descarboethoxy analogue, and terfenadine and fexofenadine hydrochloride or another pharmaceutically acceptable salt.
  • Azelastine hydrochloride is yet another H-i receptor antagonist which may be used in combination with a PDE4 inhibitor.
  • Examples of preferred anti-histamines include methapyrilene and loratadine.
  • the invention thus provides, in a further aspect, a combination comprising a compound of formula (I) a pharmaceutically acceptable salt, solvate or physiologically functional derivative thereof together with a PDE4 inhibitor.
  • the invention thus provides, in a further aspect, a combination comprising a compound of formula (I) a pharmaceutically acceptable salt, solvate or physiologically functional derivative thereof together with a corticosteroid.
  • the invention thus provides, in a further aspect, a combination comprising a compound of formula (I) a pharmaceutically acceptable salt, solvate or physiologically functional derivative thereof together with an anticholinergic.
  • the invention thus provides, in a further aspect, a combination comprising a compound of formula (I) a pharmaceutically acceptable salt, solvate or physiologically functional derivative thereof together with an antihistamine.
  • the invention thus provides, in a further aspect, a combination comprising a compound of formula (I) a pharmaceutically acceptable salt, solvate or physiologically functional derivative thereof together with a PDE4 inhibitor and a corticosteroid.
  • the invention thus provides, in a further aspect, a combination comprising a compound of formula (I) a pharmaceutically acceptable salt, solvate or physiologically functional derivative thereof together with an anticholinergic and a PDE-4 inhibitor.
  • compositions comprising a combination as defined above together with a physiologically acceptable diluent or carrier represent a further aspect of the invention.
  • the individual compounds of such combinations may be administered either sequentially or simultaneously in separate or combined pharmaceutical formulations. Appropriate doses of known therapeutic agents will be readily appreciated by those skilled in the art.
  • a process for preparing a compound of formula (I), or a salt, solvate, or physiologically functional derivative thereof which comprises a process (a), (b), (c) or (d) as defined below followed by the following steps in any order:
  • R 1 , R 2 , R 3 , R 4 , R 5 , m and n are as defined for formula (I) and Ar 1a , P 1 and P 2 are as defined for formula (II) below unless indicated otherwise.
  • a compound of formula (I) may be obtained by deprotection of a protected intermediate, for example of formula (II):
  • Ar 1a represents an optionally protected form of Ar 1 and P 1 and P 2 each independently represents either hydrogen or a protecting group, provided that the compound of formula (II) contains at least one protecting group.
  • Preferred groups Ar 1a may be selected from:
  • P 3 and P 4 are each independently either hydrogen or a protecting group provided that at least one of P 3 and P 4 is a protecting group, and the dotted line in (xvia) and (xixa) denotes an optional double bond. It will be appreciated from the foregoing structures that where Ar 1 is a group (vii), (xi), (xii), (xiii) or (xiv) protection is not required.
  • Suitable protecting groups may be any conventional protecting group such as those described in "Protective Groups in Organic Synthesis” by Theodora W Greene and Peter G M Wuts, 3rd edition (John Wiley & Sons, 1999).
  • suitable hydroxyl protecting groups represented by P 3 and P 4 are esters such as acetate ester, aralkyl groups such as benzyl, diphenylmethyl, or triphenylmethyl, and tetrahydropyranyl.
  • Suitable amino protecting groups represented by P 2 include benzyl, ⁇ - methylbenzyl, diphenylmethyl, triphenylmethyl, benzyloxycarbonyl, tert-butoxycarbonyl, and acyl groups such as trichloroacetyl or trifluoroacetyl.
  • protecting groups may include orthogonal protection of groups in the compounds of formula (II) to facilitate the selective removal of one group in the presence of another, thus enabling selective functionalisation of a single amino or hydroxyl function.
  • the -CH(OH) group may be orthogonally protected as - CH(OP 1 ) using, for example, a trialkylsilyl group such as triethylsilyl.
  • a trialkylsilyl group such as triethylsilyl.
  • orthogonal protection strategies available by conventional means as described in Theodora W Greene and Peter G M Wuts (see above).
  • the deprotection to yield a compound of formula (I), may be effected using conventional techniques.
  • P 2 , P 3 , and/or P 4 is an aralkyl group, this may be cleaved by hydrogenolysis in the presence of a metal catalyst (e.g. palladium on charcoal).
  • a metal catalyst e.g. palladium on charcoal
  • P 3 and/or P 4 When P 3 and/or P 4 is tetrahydropyranyl this may be cleaved by hydrolysis under acidic conditions.
  • Acyl groups represented by P 2 may be removed by hydrolysis, for example with a base such as sodium hydroxide, or a group such as trichloroethoxycarbonyl may be removed by reduction with, for example, zinc and acetic acid.
  • Other deprotection methods may be found in Theodora W Greene and Peter G M Wuts (see above).
  • P 3 and P 4 may together represent a protecting group as in the compound of formula (III):
  • R 22 and R 23 are independently selected from hydrogen, C ⁇ -6 alkyl, or aryl or R 22 and R 22 together form a C 3-7 cycloalkyl ring. In a preferred aspect, both R 22 and R 23 are methyl.
  • the compound of formula (111) may be converted to a compound of formula (l), by hydrolysis with dilute aqueous acid, for example acetic acid or hydrochloric acid in a suitable solvent or by transketalisation in an alcohol, for example ethanol, in the presence of a catalyst such as an acid (for example, toluenesulphonic acid) or a salt (such as pyridinium tosylate) at normal or elevated temperature.
  • a catalyst such as an acid (for example, toluenesulphonic acid) or a salt (such as pyridinium tosylate) at normal or elevated temperature.
  • protecting groups P 1 , P 2 , P 3 and P 4 may be removed in a single step or sequentially.
  • the precise order in which protecting groups are removed will in part depend upon the nature of said groups and will be readily apparent to the skilled worker.
  • this protecting group is removed together with any protecting group on the CH(OH) moiety, followed by removal of P 2 .
  • Compounds of formulae (II) and (III) wherein P 1 and P 2 are hydrogen may be prepared from the corresponding compound of formula (IV).
  • R 1 , R 2 , R 3 , R 4 , R 5 , Ar 1a , m and n are as defined for the compound of formula (II) or (III).
  • a compound of formula (IV) to a compound of formula (II) or (III) may be effected by treatment with a base, for example a non-aqueous base, such as potassium trimethylsilanolate, or an aqueous base such as aqueous sodium hydroxide, in a suitable solvent such as tetrahydrofuran.
  • a base for example a non-aqueous base, such as potassium trimethylsilanolate, or an aqueous base such as aqueous sodium hydroxide, in a suitable solvent such as tetrahydrofuran.
  • Ar 1a is as defined for formula (II);
  • L is a leaving group such as halo (typically chloro, bromo or iodo) or a sulphonate (typically methanesulphonate) and R 1 , R 2 , R 3 , R 4 , R 5 , n and m are as defined for compounds of formula (I).
  • halo typically chloro, bromo or iodo
  • sulphonate typically methanesulphonate
  • the coupling of a compound of formula (V) with a compound of formula (VI) may be effected in the presence of a base, such as a metal hydride, for example sodium hydride, or an inorganic base such as cesium carbonate, in an aprotic solvent, for example N,N- dimethylformamide.
  • a base such as a metal hydride, for example sodium hydride, or an inorganic base such as cesium carbonate
  • an aprotic solvent for example N,N- dimethylformamide.
  • Ar 1a is as hereinbefore defined and R 24 is C 1-6 alkyl, for example tert-butyl, or aryl, for example phenyl.
  • the ring closure may be effected by treatment with a base, such as a metal hydride, for example sodium hydride, in the presence of an aprotic solvent, for example, N,N-dimethylformamide.
  • the compound of formula (VII) may be prepared from the corresponding halide of formula (VIII):
  • Ar 1a and Y are as hereinbefore defined, by reaction with a protected amine HN(COOR 24 ) 2 , wherein R 24 is as defined for the compound of formula (VII), in the presence of an inorganic base such as cesium carbonate, followed by selective removal of one of the COOR 24 groups, for example by treatment with an acid such as trifluoroacetic acid, and subsequent reduction of the keto function by any suitable method, for example by treatment with borane, in the presence of a chiral catalyst, such as CBS- oxazaborolidine, in a suitable solvent such as tetrahydrofuran.
  • a chiral catalyst such as CBS- oxazaborolidine
  • a compound of formula (VI) may be prepared by coupling a compound of formula (IX):
  • L 1 is a leaving group as hereinbefore defined for L and R 1 , R 2 , R 3 , are as hereinbefore defined, followed by reduction.
  • the coupling of a compound of formula (IX) with a compound of formula (X) is conveniently effected in the presence of a catalyst system such as bis(triphenyphosphine) palladium dichloride with an organic base such as a trialkylamine, for example diisopropylethylamine, in a suitable solvent for example acetonitrile or dimethylformamide or using the base as solvent.
  • a catalyst system such as bis(triphenyphosphine) palladium dichloride with an organic base such as a trialkylamine, for example diisopropylethylamine, in a suitable solvent for example acetonitrile or dimethylformamide or using the base as solvent.
  • a catalyst system such as bis(triphenyphosphine) palladium dichloride with an organic base such as a trialkylamine, for example diisopropylethylamine
  • a suitable solvent for example acetonitrile or dimethylformamide or using the base as solvent.
  • a compound of formula (IX) may be prepared by reacting a compound of formula (XI):
  • R 4 , R 5 and n are as hereinbefore defined and Y 1 and Y 2 each represent halo.
  • reaction of compounds (XI) and (XII) is typically effected in the presence of an inorganic base, such as sodium hydroxide under phase transfer conditions in the presence of a tetra-alkylammonium salt, eg. tetrabutylammonium bromide.
  • an inorganic base such as sodium hydroxide under phase transfer conditions in the presence of a tetra-alkylammonium salt, eg. tetrabutylammonium bromide.
  • a compound of formula (IV) may also be prepared by reacting a compound of formula (V) with a compound of formula (IX), to form a compound of formula (Xlll), followed by reaction with a compound of formula (X):
  • a compound of formula (I) may be obtained by reacting a compound of formula (XIV):
  • L is a leaving group such as halo (typically chloro, bromo or iodo) or a sulphonate (typically methanesulphonate) and R 1 , R 2 , R 3 , R 4 , R 5 , n and m are as defined for compounds of formula (I).
  • halo typically chloro, bromo or iodo
  • sulphonate typically methanesulphonate
  • reaction of compounds of formula (XIV) and (VI) is optionally effected in the presence of an organic base, such as a trialkylamine, for example triethylamine, and in a suitable solvent, for example an amide such as DMF.
  • organic base such as a trialkylamine, for example triethylamine
  • suitable solvent for example an amide such as DMF.
  • the conversion of a compound of formula (XV) to a compound of formula (XIV) may be effected by reaction with sodium azide in a suitable solvent, for example N,N- dimethylformamide, to give the corresponding compound wherein Y denotes N 3 .
  • the carbonyl group may then be reduced to the corresponding alcohol by any suitable method, for example by treatment with borane, in the presence of a chiral catalyst, such as (R)-tetrahydro-1-methyl-3,3-diphenyl-1 H,3H-pyrrolo[1 ,2-c][1 ,3,2]oxazaborole, in a suitable solvent such as tetrahydrofuran.
  • the azide group may be reduced to the corresponding amine group by any suitable method, for example by catalytic hydrogenation in the presence of a catalyst such as palladium/charcoal or platinum oxide.
  • a compound of formula (I) may be prepared by reacting a compound of formula (XVI):
  • R , R , R , R , n and m are as defined for formula (II).
  • reaction may be effected using conventional conditions for such displacement reactions.
  • Compounds of formula (XVI) may be prepared by methods known in the art. Thus for example, compounds (XVI) wherein Ar is a group (xvi) may be prepared as described in EP-A-147719.
  • Compounds of formula (XVII) may be prepared by reacting a compound of formula (VI) with an amine P 2 NH 2 , followed by removal of the protecting group P 2 .
  • Ar 1a is as hereinbefore defined and R 25 represents hydrogen or a chiral auxiliary
  • R 1 , R 2 , R 3 , R 4 , n and m are as hereinbefore defined; followed where necessary by removal of the chiral auxiliary R 25 ;
  • a reducing agent such as a borohydride, typically tetramethylammonium (triacetoxy) borohydride.
  • process (di) involves use of a chiral auxiliary this is preferably the S-isomer and/or the R-isomer of phenyl glycinol.
  • the reaction may be effected as described in International Application Number WO/0196278.
  • a compound of formula (XVIII) may be prepared by methods known in the art, for example via a compound of formula (VI) as hereinbefore defined.
  • a compound of formula (XIX) may also be prepared from a corresponding alcohol, which may itself be obtained from a compound of formula (XVI) as hereinbefore defined, using standard methods well known to those skilled in the art.
  • the enantiomeric compounds of the invention may be obtained (i) by separation of the components of the corresponding racemic mixture, for example, by means of a chiral chromatography column, enzymic resolution methods, or preparing and separating suitable diastereoisomers, or (ii) by direct synthesis from the appropriate chiral intermediates by the methods described above.
  • Optional conversions of a compound of formula (I), to a corresponding salt may conveniently be effected by reaction with the appropriate acid or base.
  • Optional conversion of a compound of formula (I), to a corresponding solvate or physiologically functional derivative may be effected by methods known to those skilled in the art.
  • the present invention provides novel intermediates for the preparation of compounds of formula (I), for example: compounds of formula
  • Silica gel refers to Merck silica gel 60 Art number 7734.
  • Flash silica gel refers to Merck silica gel 60 Art number 9385.
  • Biotage refers to prepacked silica gel cartridges containing KP-Sil run on flash 12i chromatography module.
  • SPE Bond Elut are prepacked cartridges used in parallel purifications, normally under vacuum. These are commercially available from Varian.
  • SCX-2 is a solid phase extraction column pre-packed with benzene sulfonic acid resin available from International Sorbent Technology.
  • LCMS was conducted on a Supelcosil LCABZ+PLUS column (3.3 cm x 4.6 mm ID) eluting with 0.1% HCO 2 H and 0.01 M ammonium acetate in water (solvent A), and 0.05% HCO 2 H 5% water in acetonitrile (solvent B), using the following elution gradient 0-0.7 min 0%B, 0.7-4.2 min 100%B, 4.2-5.3 min 0%B, 5.3-5.5 min 0%B at a flow rate of 3 ml/min.
  • the mass spectra were recorded on a Fisons VG Platform spectrometer using electrospray positive and negative mode (ES+ve and ES-ve).
  • 8-Aminonaphthalene-2-sulfonic acid (2.23g) was dissolved in water (16ml) containing potassium hydroxide (0.556g) with warming and potassium nitrite (0.85g) was added. This solution was cooled to 21 ° (a little precipitation occurred) and was added dropwise over 35 min to 1 M sulfuric acid (14ml) with stirring, keeping the internal temperature at -2° to 0°. After stirring for a further 10min, a solution of potassium iodide (2g) in water (10ml) was added dropwise over 5min. The mixture was stirred at 21 ° for 2h and then on a steam bath for 1h. The cooled solution was concentrated to 10ml and ethanol added till no further precipitation occurred.
  • Potassium trimethylsilanolate (92mg) was added to a solution of 4-[4-( ⁇ 6-[(5 : ?)-5-(2,2- dimethyl-4/-/-1,3-benzodioxin-6-yl)-2-oxo-1 ,3-oxazolidin-3-yl]hexyl ⁇ oxy)butyl]-2- thiophenesulfonamide (102mg) in dry tetrahydrofuran (10ml). The mixture was heated at 80°C under nitrogen for 45min. Water was added and the mixture extracted with ethyl acetate. The combined extracts were dried (MgSO 4 ) and evaporated in vacuo.
  • the potencies of the compounds were determined using frog melanophores transfected with the human beta 2 adrenoreceptor. The cells were incubated with melatonin to induce pigment aggregation. Pigment dispersal was induced by compounds acting on the human beta 2 adrenoreceptor.
  • the beta 2 agonist activity of Examples 1 , 2, 3 and 4 was assessed by their ability to induce a change in light transmittance across a melanophore monolayer (a consequence of pigment dispersal). In this assay the potency of compounds at the human beta-2 receptor is expressed as a pEC 50 value. Compounds of Examples 1- 4 had a pEC 50 of >6.
  • Example 1 Potency of Example 1 at the human beta 1 and 3 receptors and potency of Examples 2, 3 and 4 at the human beta 2, 1 and 3 receptors was also determined using Chinese hamster ovary cells co-expressing the human receptor with a reporter gene. Studies were performed using either whole cells or membranes derived from those cells.
  • the three beta-receptors are coupled via the Gs G-protein to cause a stimulation of adenylate cyclase resulting in increased levels of cAMP in the cell.
  • adenylate cyclase resulting in increased levels of cAMP in the cell.
  • membranes or frozen cells have been used with either the HitHunter enzyme fragment complementation kit (DiscoveRx) or the FP 2 fluorescence polarisation kit (Perkin Elmer) to quantify the levels of cAMP present.
  • HitHunter enzyme fragment complementation kit DiscoveRx
  • FP 2 fluorescence polarisation kit Perkin Elmer
  • the reporter gene in the cells has also been used to quantify potency at the beta 1 and 3 receptors. This is a reporter of cAMP levels using the cAMP response element upstream of a firefly luciferase gene. After stimulation of the receptor with an agonist an increase in the level of luciferase is measured as a quantification of the level of cAMP in the cell.

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Abstract

L'invention concerne des composés de formule (I), dans laquelle R1 est -XSO2NR6R7; X est -(CH2)p - ou alcénylène C2-6; p est un entier compris entre 0 et 6; Ar2 est un hétéroaryle mono ou bicyclique ou un groupe aryle bicyclique; et des sels, solvates et dérivés physiologiquement fonctionnels desdits composés, utiles pour la prophylaxie ou le traitement d'un état clinique pour lequel un agoniste du récepteur bêta2-adrénergique est indiqué, tel que l'asthme ou la bronchopneumopathie chronique obstructive (BPCO).
PCT/EP2004/013998 2003-12-09 2004-12-07 Derives de phenethanolamine destines au traitement de maladies respiratoires WO2005058299A1 (fr)

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WO2010076553A1 (fr) 2008-12-30 2010-07-08 Dr. Reddy's Laboratories Ltd Composés de sulfonamide pour le traitement de troubles respiratoires
WO2010150014A1 (fr) 2009-06-24 2010-12-29 Pulmagen Therapeutics (Inflammation) Limited Glitazones 5r-5–deutérés pour le traitement de maladies respiratoires
EP2280006A1 (fr) 2005-08-08 2011-02-02 Pulmagen Therapeutics (Synergy) Limited Composition pharmaceutique pour inhalation comprenant un oxazole ou thiazole antagoniste du récepteur m3 muscarinique
EP2281813A1 (fr) 2005-08-08 2011-02-09 Pulmagen Therapeutics (Synergy) Limited Dérivés de bicyclo[2.2.1]hept-7-ylamine et leurs utilisations
WO2011051672A1 (fr) 2009-10-28 2011-05-05 Vantia Limited Dérivés azaindole
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WO2011098799A2 (fr) 2010-02-10 2011-08-18 Pulmagen Therapeutics (Inflammation) Limited Traitement de maladie respiratoire
WO2011098746A1 (fr) 2010-02-09 2011-08-18 Pulmagen Therapeutics (Inflammation) Limited Sels d'addition acide cristallins de l'énantiomère (5r) de la pioglitazone
WO2011098801A1 (fr) 2010-02-10 2011-08-18 Pulmagen Therapeutics (Inflammation) Limited Traitement de maladies inflammatoires
WO2012000896A2 (fr) 2010-06-28 2012-01-05 Bayer Cropscience Ag Composés hétérocycliques utilisés en tant qu'agents de lutte contre les parasites
US8236786B2 (en) 2008-08-07 2012-08-07 Pulmagen Therapeutics (Inflammation) Limited Respiratory disease treatment
US9913828B2 (en) 2011-09-06 2018-03-13 Novartis Ag Benzothiazolone compound

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WO2010076553A1 (fr) 2008-12-30 2010-07-08 Dr. Reddy's Laboratories Ltd Composés de sulfonamide pour le traitement de troubles respiratoires
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