WO2005040155A1 - Pyrimidin-2-amine derivates and their use as a2b adenosine receptor antagonists - Google Patents
Pyrimidin-2-amine derivates and their use as a2b adenosine receptor antagonists Download PDFInfo
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- LVILGAOSPDLNRM-UHFFFAOYSA-N Cc1ccncn1 Chemical compound Cc1ccncn1 LVILGAOSPDLNRM-UHFFFAOYSA-N 0.000 description 1
- PBMFSQRYOILNGV-UHFFFAOYSA-N c1ccnnc1 Chemical compound c1ccnnc1 PBMFSQRYOILNGV-UHFFFAOYSA-N 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
- A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
- A61K31/506—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim not condensed and containing further heterocyclic rings
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- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/02—Immunomodulators
- A61P37/06—Immunosuppressants, e.g. drugs for graft rejection
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- A—HUMAN NECESSITIES
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- 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
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
- C07D405/14—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing three or more hetero rings
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- C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
- C07D409/14—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing three or more hetero rings
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- C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
- C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
- C07D471/04—Ortho-condensed systems
Definitions
- the present invention relates to new antagonists of the A 2B adenosine receptor. These compounds are useful in the treatment, prevention or suppression of diseases and disorders known to be susceptible of being improved by antagonism of the A 2B adenosine receptor, such asasthma, allergic diseases, inflammation, atherosclerosis, hypertension, gastrointestinal tract disorders, cell proliferation disorders, diabetes mellitus and autoimmune diseases.
- Adenosine regulates several physiological functions through specific ce ⁇ membrane receptors, which are members of the G-protein coupled receptor family. Four distinct adenosine receptors have been identified and classified: A 1 t A ⁇ , A 2B and A 3 .
- the A 2B adenosine receptor subtype (see Feoktistov, I., Biaggioni, I. Pharmacol. Rev. 1997, 49, 381-402) has been identified in a variety of human and murine tissues and is involved in the regulation of vascular tone, smooth muscle growth, angiogenesis, hepatic glucose production, bowel movement, intestinal secretion, and mast cell degranulation.
- a 2B receptor antagonists have been recently disclosed for the treatment or prevention of, asthma, bronchoconstriction, allergic diseases, hypertension, atherosclerosis, reperfusion injury, myocardial ischemia, retinopathy, inflammation, gastrointestinal tract disorders, cell proliferation diseases and/or diabetes mellitus. See for example WO03/063800, WO03/042214, WO 03/035639, WO02/42298, EP 1283056, WO 01/16134, WO 01/02400, WO01/60350 or WO 00/73307.
- Further objectives of the present invention are to provide a method for preparing said compounds; pharmaceutical compositions comprising an effective amount of said compounds; the use of the compounds in the manufacture of a medicament for the treatment of pathological conditions or diseases susceptible of being improved by antagonism of the A 2B adenosine receptor ; and methods of treatment of pathological conditions or diseases susceptible to amelioration by antagonism of the A 2B adenosine receptor comprising the administration of the compounds of the invention to a subject in need of treatment.
- R 1 represents a monocyclic or polycyclic, aryl or heteroaryl group optionally substituted by one, two or three substituents selected from the group consisting of halogen atoms, straight or branched, optionally substituted lower alkyl, hydroxy, straight or branched, optionally substituted lower alkoxy, -SH, straight or branched optionally substituted lower alkylthio, nitro, cyano, -NR'R", -CO 2 R', -C(O)-NR'R", -N(R'")C(O)-R', -N(R'")-C(O)NR'R", wherein R', R" and R'" each independently represents a hydrogen atom or a straight or branched, optionally substituted lower alkyl group or R' and R" together with the atom to which they are attached form a cyclic group;
- R 2 represents a monocyclic N-containing heteroaryl group selected from the groups of formulae (lla) or (Mb):
- the groups of formula (lla) and (lib) being optionally substituted by one, two or three substituents selected from group consisting of halogen atoms, straight or branched, optionally substituted lower alkyl, hydroxy, straight or branched, optionally substituted lower alkoxy, -SH, straight or branched optionally substituted lower alkylthio, nitro, cyano, -NR'R", -CO 2 R', -C(O)-NR'R", -N(R"')C(O)-R ⁇ -N(R'")-C(O)NR'R", wherein R', R" and R'" each independently represents a hydrogen atom or a straight or branched, optionally substituted lower alkyl group or R' and R" together with the atom to which they are attached form a cyclic group;
- R 3 represents a monocyclic or polycyclic, heteroaryl group being optionally substituted by one, two or three substituents selected from group consisting of halogen atoms, straight or branched, optionally substituted lower alkyl, hydroxy, oxo, straight or branched, optionally substituted lower alkoxy, -SH, straight or branched optionally substituted lower alkylthio, nitro, cyano, -NR'R", -CO 2 R', -C(O)-NR'R", -N(R'")C(O)-R', -N(R'")-C(O)NR'R", wherein R', R" and R'" each independently represents a hydrogen atom or a straight or branched, optionally substituted lower alkyl group or R' and R" together with the atom to which they are attached form a cyclic group;
- lower alkyl embraces optionally substituted, linear or branched radicals having 1 to 8, preferably 1 to 6 and more preferably 1 to 4 carbon atoms.
- the substituents in said alkyl groups are selected from halogen atoms and hidroxy groups.
- Examples include methyl, ethyl, n-propyl, i-propyl, n-butyl, sec-butyl and tert-butyl, n- pentyl, 1-methylbutyl, 2-methylbutyl, isopentyl, 1-ethylpropyl, 1 ,1-dimethylpropyl, 1 ,2- dimethylpropyl, n-hexyl, 1-ethylbutyl, 2-ethylbutyl, 1 ,1-dimethylbutyl, 1 ,2-dimethylbutyl, 1 ,3-dimethylbutyl, 2,2-dimethylbutyl, 2,3-dimethylbutyl, 2-methylpentyl, 3-methylpentyl and iso-hexyl radicals.
- lower alkoxy embraces optionally substituted, linear or brached oxy-containing radicals each having alkyl portions of 1 to 8, preferably 1 to 6 and more preferably 1 to 4 carbon atoms.
- the substituents in said alkoxy groups are selected from halogen atoms and hidroxy groups.
- Preferred alkoxy radicals include methoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, sec- butoxy, t-butoxy, trifluoromethoxy, difluoromethoxy, hydroxymethoxy, 2-hydroxyethoxy or 2-hydroxypropoxy.
- the term lower alkylthio embraces radicals containing an optionally substituted, linear or brached alkyl radicals of 1 to 8, preferably 1 to 6 and more preferably 1 to 4 carbon atoms.
- the substituents in said alkylthio groups are selected from halogen atoms and hidroxy groups.
- Preferred optionally substituted alkylthio radicals include methylthio, ethylthio, n- propylthio, i-propylthio, n-butylthio, sec-butylthio, t-butylthio, trifluoromethylthio, difluoromethylthio, hydroxymethylthio, 2-hydroxyethylthio or 2-hydroxypropylthio.
- cyclic group embraces, unless otherwise specified, carbocyclic and heterocyclic radicals.
- the cyclic radicals can contain one or more rings.
- Carbocyclic radicals may be aromatic or alicyclic, for example cycloalkyl radicals.
- Heterocyclic radicals also include heteroaryl radicals.
- aromatic group embraces typically a 5- to 14- membered aromatic ring system, such as a 5- or 6- membered ring which may contain one or more heteroatoms selected from O, S and N.
- the radical is named aryl radical and when at least one heteroatom is present it is named heteroaryl radical.
- the aromatic radical can be monocyclic or polycyclic, such as phenyl or naphthyl.
- an aromatic radical or moiety carries 2 or more substituents, the substituents may be the same or different.
- aryl radical embraces typically a C 5 -C 14 monocyclic or polycyclic aryl radical such as phenyl or naphthyl, anthranyl or phenanthryl. Phenyl is preferred. When an aryl radical carries 2 or more substituents, the substituents may be the same or different.
- heteroaryl radical embraces typically a 5- to 14- membered ring system comprising at least one heteroaromatic ring and containing at least one heteroatom selected from O, S and N.
- a heteroaryl radical may be a single ring or two or more fused rings wherein at least one ring contains a heteroatom.
- Examples include pyridyl, pyrazinyl, pyri idinyl, pyridazinyl, furyl, oxadiazolyl, oxazolyl, imidazolyl, thiazolyl, thiadiazolyl, thienyl, pyrrolyl, pyridinyl, benzothiazolyl, indolyl, indazolyl, purinyl, quinolyl, isoquinolyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, quinolizinyl, cinnolinyl, triazolyl, indolizinyl, indolinyl, isoindolinyl, isoindolyl, imidazolidinyl, pteridinyl and pyrazolyl radicals.
- substituents may be the same or different.
- atoms, radicals, moieties, chains or cycles present in the general structures of the invention are "optionally substituted".
- substituents can be either unsubstituted or substituted in any poisition by one or more, for example 1 , 2, 3 or 4, substituents, whereby the hydrogen atoms bound to the unsubstituted atoms, radicals, moieties, chains or cycles are replaced by chemically acceptable atoms, radicals, moieties, chains or cycles.
- substituents When two or more substituents are present, each substituent may be the same or different.
- halogen atom embraces chlorine, fluorine, bromine or iodine atoms typically a fluorine, chlorine or bromine atom, most preferably chlorine or fluorine.
- halo when used as a prefix has the same meaning.
- the term pharmaceutically acceptable salt embraces salts with a pharmaceutically acceptable acid or base.
- Pharmaceutically acceptable acids include both inorganic acids, for example hydrochloric, sulphuric, phosphoric, diphosphoric, hydrobromic, hydroiodic and nitric acid and organic acids, for example citric, fumaric, maleic, malic, mandelic, ascorbic, oxalic, succinic, tartaric, benzoic, acetic, methanesulphonic, ethanesulphonic, benzenesulphonic or p-toluenesulphonic acid.
- Pharmaceutically acceptable bases include alkali metal (e.g. sodium or potassium) and alkali earth metal (e.g. calcium or magnesium) hydroxides and organic bases, for example alkyl amines, arylalkyl amines and heterocyclic amines.
- X- may be an anion of various mineral acids such as, for example, chloride, bromide, iodide, sulphate, nitrate, phosphate, or an anion of an organic acid such as, for example, acetate, maleate, fumarate, citrate, oxalate, succinate, tartrate, malate, mandelate, trifluoroacetate, methanesulphonate and p-toluenesulphonate.
- mineral acids such as, for example, chloride, bromide, iodide, sulphate, nitrate, phosphate
- organic acid such as, for example, acetate, maleate, fumarate, citrate, oxalate, succinate, tartrate, malate, mandelate, trifluoroacetate, methanesulphonate and p-toluenesulphonate.
- X- is preferably an anion selected from chloride, bromide, iodide, sulphate, nitrate, acetate, maleate, oxalate, succinate or trifluoroacetate. More preferably X- is chloride, bromide, trifluoroacetate or methanesulphonate.
- an N-oxide is formed from the tertiary basic amines or imines present in the molecule, using a convenient oxidising agent.
- Prefered compounds of the invention are those wherein R 2 represents a pyrimidinyl or pyridazinyl group which may be optionally substituted by one, two or three substituents selected from group consisting of halogen atoms, straight or branched, optionally substituted lower alkyl, hydroxy, straight or branched, optionally substituted lower alkoxy, - SH, straight or branched optionally substituted lower alkylthio, nitro, cyano, -NR'R", - CO 2 R', -C(O)-NR'R", -N(R'")C(O)-R', -N(R'")-C(O)NR'R", wherein R', R" and R'" each independently represents a hydrogen atom or a straight or branched, optionally substituted lower alkyl group or R' and R" together with the atom to which they are attached form a cyclic group.
- R 2 represents a pyrimidinyl or pyridazinyl group which may be optionally substituted by a straight or branched optionally substituted lower alkylthio group. More preferably R 2 represents a group selected from pyrimidin-4-yl, 2-methylthio-pyrimidin-4-yl and pyridazin-4-yl.
- R 3 represents a either a monocyclic or polycyclic heteroaryl group comprising a nitrogen-containing six-membered ring or a monocyclic five-membered heteroaryl group not containing nitrogen in the ring structure, the heteroaryl groups being optionally substituted by one, two or three substituents selected from the group consisting of halogen atoms, straight or branched, optionally substituted lower alkyl, hydroxy, oxo, straight or branched, optionally substituted lower alkoxy, -SH, straight or branched optionally substituted lower alkylthio, nitro, cyano, -NR'R", -CO 2 R', - C(O)-NR'R", -N(R'")C(O)-R', -N(R"')-C(O)NR'R", wherein R', R" and R'" each independently represents a hydrogen atom or a straight or branched, optionally substituted lower alkyl group
- Futher preferred compounds of the invention are those wherein R 3 represents a monocyclic or polycyclic heteroaryl group comprising a nitrogen-containing six-membered ring, the heteroaryl groups being optionally substituted by one, two or three substituents selected from the group consisting of halogen atoms, straight or branched, optionally substituted lower alkyl, hydroxy, oxo, straight or branched, optionally substituted lower alkoxy, -SH, straight or branched optionally substituted lower alkylthio, nitro, cyano, - NR'R", -CO 2 R', -C(O)-NR'R", -N(R"')C(O)-R ⁇ -N(R'")-C(O)NR'R", wherein R', R" and R'" each independently represents a hydrogen atom or a straight or branched, optionally substituted lower alkyl group or R' and R" together with the atom to which they are attached form a
- R 3 represents a rest selected from the group consisting of pyridine, pyrimidine, pyridazine, isoquinoline, quinoline, naphthyridine, pyridine-2(1 H)-one, furan and thiophene all of them optionally substituted by one, two or three substituents selected from the group consisting of halogen atoms, straight or branched, optionally substituted lower alkyl, hydroxy, oxo, straight or branched, optionally substituted lower alkoxy, -SH, straight or branched optionally substituted lower alkylthio, nitro, cyano, -NR'R", -CO 2 R', -C(O)-NR'R", - N(R'")C(O)-R', -N(R'")-C(O)NR'R", wherein R', R" and R'" each independently represents a hydrogen atom or a straight or branched
- R 3 is selected from the group consisting of pyridine, pyrimidine, pyridazine, isoquinoline, quinoline, naphthyridine and pyridine-2(1 H)-one, all of them optionally substituted by a substituent selected from the group consisting of halogen atoms, straight or branched, optionally substituted lower alkyl, oxo, straight or branched, optionally substituted lower alkoxy, straight or branched optionally substituted lower alkylthio and cyano groups.
- R 3 represents a group selected from the group consisting of pyridine and pyridine-2(1 H)-one, all of them optionally substituted by a substituent selected from the group consisting of halogen atoms, straight or branched, optionally substituted lower alkyl, oxo, straight or branched, optionally substituted lower alkoxy, straight or branched optionally substituted lower alkylthio and cyano groups.
- R 3 represents a group selected from 1-oxidopyridin-3-yl , pyrimidin-5- yl, 5-methoxypyridin-3-yl, 6-methylpyridin-3-yl, pyrazin-2-yl, 5-cyano-pyridin-3-yl, 1- oxidopyrimidin-5-yl, 2-(methylthio)pyrimidin-4-yl, 6-(benzyloxy)pyridin-3-yl, 6-oxo-1 ,6- dihydropyridin-3-yl, 1 ,6-naphthyridin-8-yl, isoquinolin-4-yl, quinolin-3-yl, pyridin-3-yl, 6- methoxypyridin-3-yl, pyridin-2-yl, 6-fluoropyridin-3-yl, 4-methylpyridin-3-yl and pyridazin-4- yl.
- R 3 represents a selected from pyridin-3-yl, 6-methoxypyridin- 3-yl, pyridin-2-yl, 6-fluoropyridin-3-yl, 4-methylpyhdin-3-yl and pyridazin-4-yl.
- R 1 represents a group selected from phenyl, furan-2-yl, furan-3-yl, thien- 2-yl, thien-3-yl, pyridin-2-yl, pyridin-3-yl and pyridin-4-yl all of them optionally substituted by one, two or three substituents selected from the group consisting of halogen atoms, straight or branched, optionally substituted lower alkyl, hydroxy, straight or branched, optionally substituted lower alkoxy, -SH, straight or branched optionally substituted lower alkylthio, nitro, cyano, -NR'R", -CO 2 R', -C(O)-NR'R", -N(R'")C(O)-R', -N(R'")-C(O)NR'R", wherein R', R" and R'" each independently represents a hydrogen atom or a straight or branched, optionally substituted lower alkyl group
- R 1 represents a group selected from phenyl, furan-2-yl, furan-3-yl, thien-2-yl, all of them optionally substituted by an halogen atom. Still more preferably R 1 represents a group selected from furan-2-yl, thien-2-yl and 3-fluorophenyl and most preferably selected from unsubstituted furan-2-yl and unsubstituted thien-2-yl.
- Prefered compounds of the present invention are those wherein R 2 represents a pyrimidinyl or pyridazinyl group which may be optionally substituted by one, two or three substituents selected from group consisting of halogen atoms, straight or branched, optionally substituted lower alkyl, hydroxy, straight or branched, optionally substituted lower alkoxy, -SH, straight or branched optionally substituted lower alkylthio, nitro, cyano, -NR'R", -CO 2 R', -C(O)-NR'R", -N(R'")C(O)-R', -N(R'")-C(O)NR'R", wherein R', R" and R'" each independently represents a hydrogen atom or a straight or branched, optionally substituted lower alkyl group or R' and R" together with the atom to which they are attached form a cyclic group.
- R 2 represents a monocyclic heteroaryl group of formula (lla): (lla)
- the heteroaryl group of formula (lla) being optionally substituted by one, two or three substituents selected from group the group consisting of halogen atoms, straight or branched, optionally substituted lower alkyl, hydroxy, oxo, straight or branched, optionally substituted lower alkoxy, -SH, straight or branched optionally substituted lower alkylthio, nitro, cyano, -NR'R", -CO 2 R', -C(O)-NR'R", -N(R'")C(O)-R', -N(R'")-C(O)NR'R", wherein R', R" and R'" each independently represents a hydrogen atom or a straight or branched, optionally substituted lower alkyl group or R' and R" together with the atom to which they are attached form a cyclic group and wherein R 3 represents a pyridine group optionally substituted by one, two or three substituents selected from group consisting of halogen
- R 2 represents a pyrimidinyl or pyridazinyl group which may be optionally substituted by a straight or branched optionally substituted lower alkylthio group.
- R 2 represents an unsubstituted pyrimidin-4-yl or unsubstituted pyridazin-4-yl group.
- Particularly prefered compounds of the present invention are those wherein R 1 represents a group selected from phenyl, furan-2-yl, furan-3-yl and thien-2-yl, all of them optionally substituted by an halogen atom, R 2 represents a pyrimidinyl or pyridazinyl group which may be optionally substituted by a straight or branched optionally substituted lower alkylthio group and wherein R 3 is selected from the group consisting of pyridine, pyrimidine, pyridazine, isoquinoline, quinoline, naphthyridine and pyridine-2(1 H)-one, all of them optionally substituted by a substituent selected from the group consisting of halogen atoms, straight or branched, optionally substituted lower alkyl, oxo, straight or branched, optionally substituted lower alkoxy, straight or branched optionally substituted lower alkylthio and cyano groups as well as their pharmaceutical
- R 1 represents a group selected from unsubstituted furan-2-yl and unsubstituted thien-2-yl
- R 2 represents an unsubstituted pyrimidin-4-yl or an unsubstituted pyhdazin-4-yl
- R 3 is selected from the group consisting of pyridine, pyrimidine, pyridazine, isoquinoline, quinoline, naphthyridine and pyridine-2(1H)-one, all of them optionally substituted by a substituent selected from the group consisting of halogen atoms, straight or branched, optionally substituted lower alkyl, oxo, straight or branched, optionally substituted lower alkoxy, straight or branched optionally substituted lower alkylthio and cyano groups as well as their pharmaceutically acceptable salts and N-oxides.
- Particular individual compounds of the invention include:
- compounds of general formula (I) are prepared by coupling a compound of formula (IX) where R 1 and R 2 are as hereinbefore defined with a compound of formula (III) where R 3 is as hereinbefore defined and X is halogen, preferably bromine, iodine or chlorine.
- the reaction is carried out using the palladium and/or copper catalyzed general methods for the arylation of amines (for references see Yin, J. et al. Org. Lett. 2002, 4(20), 3481 and Buchwald S. L. et al. J. Am. Chem. Soc. 2002, 124, 7421).
- the intermediate compounds of formula (IX) can be prepared by reaction of a corresponding ethanone derivative (IV) in a two steps sequence.
- the compound of formula (IV) is reacted in neat dimethylformamide dialkyl acetal of formula (V) (preferably dimethylacetal) at room temperature.
- the corresponding dimethylamino propenone derivative of formula (VI) reacts with guanidine in the form of a salt (VII), e.g. hydrohalide or carbonate, in an organic solvent, preferably a polar aprotic solvent, such as ⁇ /, ⁇ /-dimethylformamide, dioxane, acetone or tetrahydrofuran, in the presence of a base, such as potassium carbonate, and at a temperature from 15°C to 110°C to yield the compound of formula (IX).
- a salt e.g. hydrohalide or carbonate
- an organic solvent preferably a polar aprotic solvent, such as ⁇ /, ⁇ /-dimethylformamide, dioxane, acetone or tetrahydrofuran
- a base such as potassium carbonate
- the intermediate compounds of formula (IV) can be prepared by reaction of a methyl substituted heteroaromatic ring (X) with and aromatic or heteroaromatic carboxylic acid ester (preferably methyl or ethyl ester) (XI) as shown in the scheme below.
- reaction is carried out in an organic solvent, preferably a polar aprotic solvent such as tetrahydrofuran, in the presence of a base such as lithium bis(trimethylsilyl)amide and at a temperature from -70°C to 50°C to yield the compound of formula (IV).
- organic solvent preferably a polar aprotic solvent such as tetrahydrofuran
- a base such as lithium bis(trimethylsilyl)amide
- Guanidines of general formula (VIII) are prepared using methods known per se (for example see Barber, C.G. et al. Bioorg. Med. Chem. Lett. 2002, 12, 181-184).
- the pyrimidin-2-amine derivatives of formula (I) can be converted by methods known per se into pharmaceutically acceptable salts or N-oxides.
- Preferred salts are acid addition salts obtainable by treatment with organic or inorganic acids such as fumaric, tartaric, succinic or hydrochloric acid.
- pyhmidin-2-amine derivatives of formula (I) in which there is the presence of an acidic group may be converted into pharmacologically acceptable salts by reaction with an alkali metal hydroxide or an organic base such as sodium or potassium hydroxide.
- the acid or alkali addition salts so formed may be interchanged with suitable pharmaceutically acceptable counter ions using processes known per se.
- CHO-K1 cells expressing human recombinant A T receptors were purchased from Euroscreen (Belgium).
- cells were collected from tissue culture plates using a cell scraper, resuspended in 10-15 ml of homogenization buffer (Tris-HCl 15 mM pH 7.5, MgCI 2 2 mM, EDTA 0.3 mM, EGTA 1 mM), homogenized, and centrifuged at 40.000 g for 25 minutes. The resulting pellet was resuspended in the same buffer and centrifuged again for 25 minutes.
- homogenization buffer Tris-HCl 15 mM pH 7.5, MgCI 2 2 mM, EDTA 0.3 mM, EGTA 1 mM
- the pellet was resuspended in 500 ⁇ l of storage buffer (Tris-HCl 7.5 mM pH 7.5, MgCI 2 12.5 mM, EDTA 0.3 mM, EGTA 1 mM, sucrose 250 mM) where the total protein content was determined.
- storage buffer Tris-HCl 7.5 mM pH 7.5, MgCI 2 12.5 mM, EDTA 0.3 mM, EGTA 1 mM, sucrose 250 mM
- Competition assays were carried out incubating 15 ⁇ g of A ⁇ membrane preparations, 2 nM [ 3 H]-DPCPX (Amersham) as radioligand and 10 ⁇ M of unlabelled DPCPX ligand, in a total volume of 100 ⁇ l of buffer (Hepes 20 mM pH 7.4, NaCl 100 mM, MgCI 2 10 mM, 2 U/ml adenosin deaminase) for 1 h at 25°C.
- buffer Hepes 20 mM pH 7.4, NaCl 100 mM, MgCI 2 10 mM, 2 U/ml adenosin deaminase
- Samples were filtered and washed 4 times with 250 ⁇ l of buffer (Hepes 20 mM pH 7.4, NaCl 100 mM, MgCI 2 10 M) using plates (Millipore MAFCN0B50) preincubated for 15 min. in 250 ⁇ l of the same buffer. Samples were counted using 30 ⁇ l of LSC Universol (ICN) in a Wallac 1450 Microbeta counter. Non specific binding was tested using 10 ⁇ M R-PIA.
- Membranes were prepared from Hela cells stably transfected with the human recombinant A ⁇ A receptor.
- cells were collected from tissue culture plates using a cell scraper, resuspended in 10-15 ml homogenization buffer (Tris-HCl 5 mM, EDTA 2 mM), homogenized, and centrifuged at 1.000 g. for 10 min. at 4°C. The supernatant was then recovered and centrifuged at 50.000 g for 1 h. at 4°C. Finally, the pellet was resuspended in 100-500 ⁇ l storage buffer (Tris-HCl 50 mM pH 7.4) where the total protein content was determined.
- Membranes derived from HEK293 cells transfected with recombinant human A 2B were purchased from Receptor Biology. Competition assays were carried out incubating 18 ⁇ g of A 2B -membranes, 35 nM [ 3 H]-DPCPX (Amersham) as radioligand and 400 ⁇ M of unlabelled DPCPX ligand, in a total volume of 100 ⁇ l of buffer (Tris-HCl 50 mM pH 6.5, MgCI 2 10 mM, EDTA 1 mM, benzamidine 0.1 mM, 2 U/ml adenosine deaminase) for 30 minutes at 25°C.
- buffer Tris-HCl 50 mM pH 6.5, MgCI 2 10 mM, EDTA 1 mM, benzamidine 0.1 mM, 2 U/ml adenosine deaminase
- Samples were filtered 4 times with 250 ⁇ l of buffer (Tris-HCl 50 mM pH 6.5) using plates (Millipore MAFBN0B50) preincubated for 15 min. in 250 ⁇ l of the same buffer. Samples were counted using 30 ⁇ l of LSC Universol (ICN) in a Wallac 1450 Microbeta counter. Non specific binding was tested using 400 ⁇ M NECA.
- Membranes were prepared from Hela cells stably transfected with the human recombinant A 3 receptor.
- cells were collected from tissue culture plates using a cell scraper, resuspended in 10-15 ml of homogenization buffer (Tris-HCl 5 mM, EDTA 2 mM), homogenized, and centrifuged at 1.000 g. for 10 min. at 4°C. The supernatant was then recovered and centrifuged at 50.000 g for 1 h. at 4°C. Finally, the pellet was resuspended in 100-500 ⁇ l of storage buffer (Tris-HCl 50 mM pH 7.4) where the total protein content was determined.
- Tris-HCl 50 mM pH 7.4 storage buffer
- the assay was carried out using CHO-K1 transfected with human recombinant A 2B receptor and a commercial EIA kit (Amersahm, RPN225). Cells were seeded in 96 well plates at 10.000 cells/well. After 24h, plates were placed on ice for 5 minutes, the medium was removed, and all wells were rinsed twice with 100 ⁇ l of incubation medium (Hepes 25 mM, DMEM-F12). After washing, Rolipram (30 ⁇ M) and antagonists were added in 100 ⁇ l of incubation medium, and the plates were incubated for 15 minutes at 37°C. NECA was then added to reach a final concentration of 10 ⁇ M and the plates were incubated for another 15 minutes at 37°C.
- lysis buffer reactive 1 B from Amersham RPN225
- lysis buffer reactive 1 B from Amersham RPN225
- the plates were incubated 10 minutes at room temperature with slight agitation.
- 100 ⁇ l of the lysate were transferred to a plate pretreated with anti-rabbit antibody, 100 ⁇ l of rabbit anti- cAMP serum were added to the wells and the plates were incubated for 2 h at 4°C.
- Peroxidase-coupled cAMP was then added, and the plates incubated for 1 hour at 4°C. Plates were then washed 4 times with 100 ⁇ l of buffer (washing buffer, Amersham RPN225).
- the compounds of formula (I) are potent inhibitors of the A 2B adenosine receptor subtype and very selective over the other adenosine receptor subtypes.
- Preferred pyrimidin-2-amine derivatives of the invention possess a functional K, value for the inhibition of A 2B (determined as defined above) of less than 100 nM, preferably less than 60 nM and most preferably less than 20 nM.
- the pyrimidin-2-amine derivatives of the invention are useful in the treatment or prevention of diseases known to be susceptible to improvement by treatment with an antagonist of the A 2B adenosine receptor.
- diseases are, for example asthma, bronchoconstriction, allergic diseases, inflammation, reperfusion injury, myocardial ischemia, atherosclerosis, hypertension, retinopathy, diabetes mellitus, inflammation, gastrointestinal tract disorders, and/or autoimmune diseases.
- autoimmune diseases which can be treated or prevented using the compounds of the invention are Addison's disease, autoimmune hemolytic anemia, Crohn's disease, Goodpasture's syndrome, Graves disease, Hashimoto's thyroiditis, idiopathic thrombocytopenic purpura, insulin-dependent diabetes mellitus, multiple sclerosis, myasthenia gravis, pemphigus vulgaris, pernicious anemia, poststreptococcal glomerulonephhtis, psoriasis, rheumatoid arthritis, scleroderma, Sjogren's syndrome, spontaneous infertility, and systemic lupus erythematosus.
- the pyrimidin-2-amine derivatives of the invention and pharmaceutically acceptable salts thereof, and pharmaceutical compositions comprising such compound and/or salts thereof may be used in a method of treatment of disorders of the human body which comprises administering to a subject requiring such treatment an effective amount of pyrimidin-2-amine derivative of the invention or a pharmaceutically acceptable salt thereof.
- the present invention also provides pharmaceutical compositions which comprise, as an active ingredient, at least a pyhmidin-2-amine derivative of formula (I) or a pharmaceutically acceptable salt thereof in association with a pharmaceutically acceptable excipient such as a carrier or diluent.
- the active ingredient may comprise 0.001% to 99% by weight, preferably 0.01% to 90% by weight of the composition depending upon the nature of the formulation and whether further dilution is to be made prior to application.
- the compositions are made up in a form suitable for oral, topical, nasal, rectal, percutaneous or injectable administration.
- compositions of this invention are well-known per se and the actual excipients used depend inter alia on the intended method of administering the compositions.
- compositions of this invention are preferably adapted for injectable and per os administration.
- the compositions for oral administration may take the form of tablets, retard tablets, sublingual tablets, capsules, inhalation aerosols, inhalation solutions, dry powder inhalation, or liquid preparations, such as mixtures, elixirs, syrups or suspensions, all containing the compound of the invention; such preparations may be made by methods well-known in the art.
- Tablets or capsules may conveniently contain between 2 and 500 mg of active ingredient or the equivalent amount of a salt thereof.
- the liquid composition adapted for oral use may be in the form of solutions or suspensions.
- the solutions may be aqueous solutions of a soluble salt or other derivative of the active compound in association with, for example, sucrose to form a syrup.
- the suspensions may comprise an insoluble active compound of the invention or a pharmaceutically acceptable salt thereof in association with water, together with a suspending agent or flavouring agent.
- compositions for parenteral injection may be prepared from soluble salts, which may or may not be freeze-dried and which may be dissolved in pyrogen free aqueous media or other appropriate parenteral injection fluid. Effective doses are normally in the range of 2-2000 mg of active ingredient per day. Daily dosage may be administered in one or more treatments, preferably from 1 to 4 treatments, per day.
- the mobile phase was formic acid (0.46 ml), ammonia (0.115 ml) and water (1000 ml) (A) and formic acid (0.4 ml), ammonia (0.1 ml), methanol (500 ml) and acetonitrile (500 ml) (B): initially from 0% to 95% of B in 20 min, and then 4 min. with 95% of B. The reequilibration time between two injections was 5 min. The flow rate was 0.4 ml/min. The injection volume was 5 ⁇ l. Diode array chromatograms were processed at 210 nm.
- EXAMPLE 21 5- ⁇ [4'-(2-Furyl)-4,5'-bipyrimidin-2 , -yl]amino ⁇ pyridin-2(1H)-one Obtained as an off-white solid (11%) by catalytic hydrogenation of the title compound of example 20 (125 mg) in tetrahydrofuran (4 mL) using 10% Palladium(ll) hydroxide and a hydrogen balloon.
- the above ingredients were sieved through a 60 mesh sieve, and were loaded into a suitable mixer and filled into 50,000 gelatine capsules.
- COMPOSITION EXAMPLE 2 50,000 tablets each containing 50 mg of 4'-(2-furyl)- ⁇ /-pyridin-3-yl-4,5'-bipyrimidin-2'- amine (active ingredient) were prepared from the following formulation:
- All the powders were passed through a screen with an aperture of 0.6 mm, then mixed in a suitable mixer for 20 minutes and compressed into 300 mg tablets using 9 mm disc and flat bevelled punches.
- the disintegration time of the tablets was about 3 minutes.
Abstract
Description
Claims
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
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JP2006530007A JP2007507443A (en) | 2003-10-02 | 2004-09-22 | Pyrimidin-2-amine derivatives and their use as A2B adenosine receptor antagonists |
NZ546266A NZ546266A (en) | 2003-10-02 | 2004-09-22 | Pyrimidin-2-amine derivatives and their use as A2B adenosine receptor antagonists |
MXPA06003525A MXPA06003525A (en) | 2003-10-02 | 2004-09-22 | Pyrimidin-2-amine derivates and their use as a2b adenosine receptor antagonists. |
CA002540765A CA2540765A1 (en) | 2003-10-02 | 2004-09-22 | Pyrimidin-2-amine derivatives and their use as a2b adenosine receptor antagonists |
AU2004283800A AU2004283800B8 (en) | 2003-10-02 | 2004-09-22 | Pyrimidin-2-amine derivates and their use as A2B adenosine receptor antagonists |
BRPI0415324-3A BRPI0415324A (en) | 2003-10-02 | 2004-09-22 | compound, process for producing a compound, pharmaceutical composition, use of a compound and method for treating a subject suffering from a pathological condition or disease amenable to adenosine a2b receptor antagonism |
EP04765506A EP1668000A1 (en) | 2003-10-02 | 2004-09-22 | Pyrimidin-2-amine derivatives and their use as a2b adenosine receptor antagonists |
US10/574,101 US20070265273A1 (en) | 2003-10-02 | 2004-09-22 | Pyrimidin-2-Amine Derivatives and Their Use as A2b Adenosine Receptor Antagonists |
UAA200604615A UA82563C2 (en) | 2003-10-02 | 2004-09-22 | Pyrimidine-2-amine derivatives as selective antagonists of а2в adenosine receptor |
IL174771A IL174771A0 (en) | 2003-10-02 | 2006-04-03 | Pyrimidin-2-amine derivatives and their use as a2b adenosine receptor antagonists |
NO20061952A NO20061952L (en) | 2003-10-02 | 2006-05-02 | Pyrimidine-2-amine derivatives and their use as A2B adenosine receptor antagonists |
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ESP200302275 | 2003-10-02 | ||
ES200302275A ES2229928B1 (en) | 2003-10-02 | 2003-10-02 | NEW DERIVATIVES OF PIRIMIDIN-2-AMINA. |
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US (1) | US20070265273A1 (en) |
EP (1) | EP1668000A1 (en) |
JP (1) | JP2007507443A (en) |
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BR (1) | BRPI0415324A (en) |
CA (1) | CA2540765A1 (en) |
CO (1) | CO5690593A2 (en) |
EC (1) | ECSP066426A (en) |
ES (1) | ES2229928B1 (en) |
IL (1) | IL174771A0 (en) |
MX (1) | MXPA06003525A (en) |
NO (1) | NO20061952L (en) |
NZ (1) | NZ546266A (en) |
PE (1) | PE20050473A1 (en) |
RU (1) | RU2006114746A (en) |
SG (1) | SG149077A1 (en) |
TW (1) | TW200526645A (en) |
UA (1) | UA82563C2 (en) |
UY (1) | UY28529A1 (en) |
WO (1) | WO2005040155A1 (en) |
ZA (1) | ZA200602139B (en) |
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EP2308866A1 (en) | 2009-10-09 | 2011-04-13 | Bayer CropScience AG | Phenylpyri(mi)dinylpyrazoles and their use as fungicides |
EP2322176A1 (en) | 2009-11-11 | 2011-05-18 | Almirall, S.A. | New 7-phenyl-[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one derivatives |
WO2011076725A1 (en) | 2009-12-21 | 2011-06-30 | Bayer Cropscience Ag | Thienylpyri (mi) dinylazole and their use for controlling phytopathogenic fungi |
US8293757B2 (en) | 2007-08-22 | 2012-10-23 | Irm Llc | 5-(4-(haloalkoxy)phenyl) pyrimidine-2-amine compounds and compositions as kinase inhibitors |
RU2471793C2 (en) * | 2007-06-08 | 2013-01-10 | Байер Кропсайенс Аг | Fungicide based on heterocyclyl-pyrimidinyl-amino derivatives |
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NZ589657A (en) | 2004-10-15 | 2012-06-29 | Gilead Palo Alto Inc | Method of preventing and treating airway remodeling and pulmonary inflammation using A2B adenosine receptor antagonists |
ES2303776B1 (en) * | 2006-12-29 | 2009-08-07 | Laboratorios Almirall S.A. | DERIVATIVES OF 5-PHENYL-6-PIRIDIN-4-IL-1,3-DIHIDRO-2H-IMIDAZO (4,5-B) PIRIDIN-2-ONA USEFUL AS ANTAGONISTS OF ADENOSINE A2B RECEIVER. |
EP2173722B1 (en) * | 2007-07-26 | 2012-08-29 | Novartis AG | Pyrimidine derivatives useful for the treatment of inflammatory or allergic conditions |
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AU2004283800B8 (en) | 2009-06-18 |
ES2229928A1 (en) | 2005-04-16 |
NZ546266A (en) | 2008-10-31 |
KR20060097010A (en) | 2006-09-13 |
TW200526645A (en) | 2005-08-16 |
US20070265273A1 (en) | 2007-11-15 |
CA2540765A1 (en) | 2005-05-06 |
AU2004283800A1 (en) | 2005-05-06 |
CO5690593A2 (en) | 2006-10-31 |
CN1886402A (en) | 2006-12-27 |
IL174771A0 (en) | 2006-08-20 |
BRPI0415324A (en) | 2006-12-05 |
RU2006114746A (en) | 2007-11-20 |
WO2005040155A8 (en) | 2006-04-20 |
AR046170A1 (en) | 2005-11-30 |
UA82563C2 (en) | 2008-04-25 |
NO20061952L (en) | 2006-06-26 |
MXPA06003525A (en) | 2006-06-08 |
SG149077A1 (en) | 2009-01-29 |
EP1668000A1 (en) | 2006-06-14 |
ES2229928B1 (en) | 2006-07-01 |
JP2007507443A (en) | 2007-03-29 |
PE20050473A1 (en) | 2005-08-24 |
ECSP066426A (en) | 2006-10-17 |
ZA200602139B (en) | 2007-06-27 |
AU2004283800B2 (en) | 2009-05-07 |
UY28529A1 (en) | 2005-04-29 |
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