Ion channel modulating agents

Abstract

The present invention relates to ion channel modulating agents. More particularly, the present invention relates to a particular class of chemical compounds represented by general formula (I) that has proven useful as modulators of SK Ca , IK Ca and BK Ca channels. In further aspects, the present invention relates to the use of these SK/IK/BK channel modulating agents for the manufacture of medicaments, and pharmaceutical compositions comprising the SK/IK/BK channel modulating agents. The SK/IK/BK channel modulating agents of the invention are useful for the treatment or alleviation of diseases and conditions associated with the SK/IK/BK channels.

1 . A chemical compound represented by the general Formula I  
       
         
           
           
               
               
           
         
       
       and a pharmaceutically acceptable salt or an oxide or a hydrate thereof, wherein, 
 X and Y, independently of each another, represent an oxygen atom, a sulphur atom, or a group of the formula —NH—, in which case the dotted line represents no double bond; or a nitrogen atom, in which case the dotted line represent the location of a double bond;  
 R′″ and R″″, independently of each another, represent hydrogen or alkyl;  
 R 1  and R 2 , independently of each another, represent  
 hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, amino, trihalogenmethyl, nitro, cyano, or phenyl, or a group of the formula —OR′, —SR′, —R′OR″, —R′SR″, —C(O)R′, —C(S)R′, —C(O)OR′, —C(S)OR′, —C(O)SR′, —C(S)SR′, —C(O)NR′(OR″), —C(S)NR′(OR″), —C(O)NR′(SR″), —C(S)NR′(SR″), —CH(CN) 2 , —C(O)NR′ 2 , —C(S)NR′ 2 , —CH[C(O)R′] 2 , —CH[C(S)R′] 2 , —CH[C(O)OR′] 2 , —CH[C(S)OR′] 2 , —CH[C(O)SR′] 2 , —CH[C(S)SR′] 2 , CH 2 OR′, or CH 2 SR′; or  
 a mono- or poly-carbocyclic group, a mono- or poly-heterocyclic group, an aralkyl group, or a hetero-alkyl group, which mono- or polycyclic groups or aralkyl or hetero-alkyl groups may optionally be substituted one or more times with substituents selected from the group consisting of halogen, trihalogenmethyl, alkyl, alkenyl, alkynyl, amino, nitro, cyano, or amido, or a group of the formula —R′, —OR′, —SR′, —R′OR″, —R′SR″, —C(O)R′, —C(S)R′, —C(O)OR′, —C(S)OR′, —C(O)SR′, or —C(S)SR′, or a phenyl or a phenoxy group, which phenyl or phenoxy groups may optionally be substituted on or more times with substituents selected from the group consisting of halogen, trihalogenmethyl, alkyl, alkenyl, alkynyl, amino, nitro, cyano, or amido, or a group of the formula —R′, —OR′, —SR′, —R′OR″, —R′SR″, —C(O)R′, —C(S)R′, —C(O)OR′, —C(S)OR′, —C(O)SR′, or —C(S)SR′;  
 wherein  
 R′ and R″, independently of each another, represent hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl or alkoxy, or a group of the formula NR′″R″″, wherein R′″ and R″″, independently of each another, represent hydrogen or alkyl; or  
 or R 1  and R 2  together form a mono- or poly-carbocyclic group, or a mono- or poly-heterocyclic group, which mono- or polycyclic groups may optionally be substituted one or more times with substituents selected from the group consisting of halogen, trihalogenmethyl, alkyl, alkenyl, alkynyl, amino, nitro, cyano, or amido, or a group of the formula —R′, —OR′, —SR′, —R′OR″, —R′SR″, —C(O)R′, —C(S)R′, —C(O)OR′, —C(S)OR′, —C(O)SR′, or —C(S)SR′, or a phenyl or a phenoxy group, which phenyl or phenoxy groups may optionally be substituted on or more times with substituents selected from the group consisting of halogen, trihalogenmethyl, alkyl, alkenyl, alkynyl, amino, nitro, cyano, or amido, or a group of the formula —R′, —OR′, —SR′, —R′OR″, —R′SR″, —C(O)R′, —C(S)R′, —C(O)OR′, —C(S)OR′, —C(O)SR′, or —C(S)SR′;  
 wherein  
 R′ and R″, independently of each another, represent hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl or alkoxy, or a group of the formula NR′″R″″, wherein R′″ and R″″, independently of each another, represent hydrogen or alkyl.  
 
     
     
         2 . The chemical compound of  claim 1 , represented by the general Formula II  
       
         
           
           
               
               
           
         
       
       and a pharmaceutically acceptable salt or an oxide or a hydrate thereof, wherein, 
 R′″ and R″″ R 1  and R 2 and are as defined in  claim 1 .  
 
     
     
         3 . The chemical compound of  claim 1 , represented by the general Formula III  
       
         
           
           
               
               
           
         
       
       and a pharmaceutically acceptable salt or an oxide or a hydrate thereof, wherein, 
 R′″ and R′″ are as defined in  claim 1;  and  
 R 3  represents hydrogen, halogen, trihalogenmethyl, alkyl, alkenyl, alkynyl, amino, nitro, cyano, or amido, or a group of the formula —R′, —OR′, —SR′, —R′OR″, —R′SR″, —C(O)R′, —C(S)R′, —C(O)OR′, —C(S)OR′, —C(O)SR′, or —C(S)SR′;  
 wherein  
 R′ and R″, independently of each another, represent hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl or alkoxy, or a group of the formula NR′″R″″, wherein R′″ and R″″, independently of each another, represent hydrogen or alkyl.  
 
     
     
         4 . The chemical compound of  claim 3 , which is 
 2-Amino-4,5-dichlorobenzothiazole;    2-Amino-4,5-dimethylbenzothiazole; or    2-Amino-(5,6,7,8-tetrahydronaphto)-[1,2-d]-thiazole;    or a pharmaceutically acceptable salt or an oxide or a hydrate thereof.    
     
     
         5 . The chemical compound of any of claims  1 - 4 , for use as a medicament.  
     
     
         6 . Use of a chemical compound according to any of claims  1 - 4  or a pharmaceutically-acceptable addition salt thereof, for the manufacture of a medicament for the treatment, prevention or alleviation of a disease or a disorder or a condition of a mammal, including a human, which disease, disorder or condition is responsive to modulation of SK Ca , IK Ca  and/or BK channels.  
     
     
         7 . A pharmaceutical composition comprising a therapeutically effective amount of the chemical compound of any of claims  1 - 4 , or a pharmaceutically-acceptable addition salt thereof, together with at least one pharmaceutically-acceptable carrier or diluent.  
     
     
         8 . The pharmaceutical composition according to  claim 7 , for the treatment, prevention or alleviation of a disease or a disorder or a condition such as asthma, cystic fibrosis, chronic obstructive pulmonary disease and rhinorrhea, convulsions, vascular spasms, coronary artery spasms, renal disorders, polycystic kidney disease, bladder spasms, urinary incontinence, bladder outflow obstruction, irritable bowel syndrome, gastrointestinal dysfunction, secretory diarrhoea, ischaemia, cerebral ischaemia, ischaemic hearth disease, angina pectoris, coronary hearth disease, traumatic brain injury, psychosis, anxiety, depression, dementia, memory and attention deficits, Alzheimer's disease, dysmenorrhea, narcolepsy, Reynaud's disease, intermittent claudication, Sjorgren's syndrome, migraine, arrhythmia, hypertension, absence seizures, myotonic muscle dystrophia, xerostomi, diabetes type II, hyperinsulinemia, premature labour, baldness or cancer.  
     
     
         9 . The pharmaceutical composition according to  claim 7 , for the treatment, prevention or alleviation of a disease or a disorder or a condition relating to immune dysfunction.  
     
     
         10 . The pharmaceutical composition according to  claim 9 , for the treatment, prevention or alleviation of a disease or a disorder or a condition relating to an auto-immune disease, e.g. Addison's disease, alopecia areata, Ankylosing spondylitis, haemolytic anemia (anemia haemolytica), pernicious anemia (anemia perniciosa), aphthae, aphthous stomatitis, arthritis, arteriosclerotic disorders, osteoarthritis, rheumatoid arthritis, aspermiogenese, asthma bronchiale, auto-immune asthma, auto-immune hemolysis, Bechet's disease, Boeck's disease, inflammatory bowel disease, Burkitt's lymphoma, Chron's disease, chorioiditis, colitis ulcerosa, Coeliac disease, cryoglobulinemia, dermatitis herpetiformis, dermatomyositis, insulin-dependent type I diabetes, juvenile diabetes, idiopathic diabetes insipidus, insulin-dependent diabetes mellisis, auto-immune demyelinating diseases, Dupuytren's contracture, encephalomyelitis, encephalomyelitis allergica, endophthalmia phacoanaphylactica, enteritis allergica, auto-immune enteropathy syndrome, erythema nodosum leprosum, idiopathic facial paralysis, chronic fatigue syndrome, febris rheumatica, glomerulo nephritis, Goodpasture's syndrome, Graves' disease, Hamman-Rich's disease, Hashimoto's disease, Hashimoto's thyroiditis, sudden hearing loss, sensoneural hearing loss, hepatitis chronica, Hodgkin's disease, haemoglobinuria paroxysmatica, hypogonadism, ileitis regionalis, iritis, leucopenia, leucemia, lupus erythematosus disseminatus, systemic lupus erythematosus, cutaneous lupus erythematosus, lymphogranuloma malignum, mononucleosis infectiosa, myasthenia gravis, traverse myelitis, primary idiopathic myxedema, nephrosis, ophthalmia symphatica, orchitis granulomatosa, pancreatitis, pemphigus, pemphigus vulgaris, polyarteritis nodosa, polyarthritis chronica primaria, polymyositis, polyradiculitis acuta, psoreasis, purpura, pyoderma gangrenosum, Quervain's thyreoiditis, Reiter's syndrome, sarcoidosis, ataxic sclerosis, progressive systemic sclerosis, scleritis, sclerodermia, multiple sclerosis, sclerosis disseminata, acquired spenic atrophy, infertility due to antispermatozoan antobodies, thrombocytopenia, idiopathic thrombocytopenia purpura, thymoma, acute anterior uveitis, vitiligo, AIDS, HIV, SCID and Epstein Barr virus associated diseases such as Sjorgren's syndrome, virus (AIDS or EBV) associated B cell lymphoma, parasitic diseases such as Lesihmania, and immunosuppressed disease states such as viral infections following allograft transplantations, graft vs. Host syndrome, transplant rejection, or AIDS, cancers, chronic active hepatitis diabetes, toxic chock syndrome, food poisoning, and transplant rejection.  
     
     
         11 . The pharmaceutical composition of either of claims  9 - 10 , which pharmaceutical composition further comprises a therapeutically effective amount of a conventional immune-suppressing agent.  
     
     
         12 . The pharmaceutical composition according to  claim 11 , wherein the immune-suppressing agent is Amphotericin, Busulphan, Co-trimoxazole, Chlorambucil, colony stimulating factors, corticosteroids, Cyclophosphamide, Fluconazole, folinic acid, Ganciclovir, antilymphocyte immunoglobulins, normal immunoglobulins, Methotrexate, Methylprednisolone, Octreotide, Oxpentifylline, Tacrolimus (FK506), Thalidomide, Zolimomab aritox, and the calcineurin inhibitors (protein phosphatase 2B inhibitors), in particular Cyclosporin.  
     
     
         13 . A method of treatment, prevention or alleviation of a disease or a disorder or a condition of a living animal body, including a human, which disorder, disease or condition is responsive to modulation of SK Ca , IK Ca  and/or BK channels, comprising the step of administering to such a living animal body, including a human, in need thereof a therapeutically effective amount of a chemical compound according to any of claims  1 - 4 .  
     
     
         14 . The method according to  claim 13 , wherein the disease, disorder or condition is asthma, cystic fibrosis, chronic obstructive pulmonary disease and rhinorrhea, convulsions, vascular spasms, coronary artery spasms, renal disorders, polycystic kidney disease, bladder spasms, urinary incontinence, bladder outflow obstruction, irritable bowel syndrome, gastrointestinal dysfunction, secretory diarrhoea, ischaemia, cerebral ischaemia, ischaemic hearth disease, angina pectoris, coronary hearth disease, traumatic brain injury, psychosis, anxiety, depression, dementia, memory and attention deficits, Alzheimer's disease, dysmenorrhea, narcolepsy, Reynaud's disease, intermittent claudication, Siorgren's syndrome, migraine, arrhythmia, hypertension, absence seizures, myotonic muscle dystrophia, xerostomi, diabetes type II, hyperinsulinemia, premature labour, baldness or cancer.  
     
     
         15 . The method according to  claim 13 , wherein the disease, disorder or condition relates to immune dysfunction.  
     
     
         16 . The method of  claim 15 , wherein the disease, disorder or condition is an auto-immune disease, such as Addison's disease, alopecia areata, Ankylosing spondylitis, haemolytic anemia (anemia haemolytica), pernicious anemia (anemia perniciosa), aphthae, aphthous stomatitis, arthritis, arteriosclerotic disorders, osteoarthritis, rheumatoid arthritis, aspermiogenese, asthma bronchiale, auto-immune asthma, auto-immune hemolysis, Bechet's disease, Boeck's disease, inflammatory bowel disease, Burkitt's lymphoma, Chron's disease, chorioiditis, colitis ulcerosa, Coeliac disease, cryoglobulinemia, dermatitis herpetiformis, dermatomyositis, insulin-dependent type I diabetes, juvenile diabetes, idiopathic diabetes insipidus, insulin-dependent diabetes mellisis, auto-immune demyelinating diseases, Dupuytren's contracture, encephalomyelitis, encephalomyelitis allergica, endophthalmia phacoanaphylactica, enteritis allergica, auto-immune enteropathy syndrome, erythema nodosum leprosum, idiopathic facial paralysis, chronic fatigue syndrome, febris rheumatica, glomerulo nephritis, Goodpasture's syndrome, Graves' disease, Hamman-Rich's disease, Hashimoto's disease, Hashimoto's thyroiditis, sudden hearing loss, sensoneural hearing loss, hepatitis chronica, Hodgkin's disease, haemoglobinuria paroxysmatica, hypogonadism, ileitis regionalis, iritis, leucopenia, leucemia, lupus erythematosus disseminatus, systemic lupus erythematosus, cutaneous lupus erythematosus, lymphogranuloma malignum, mononucleosis infectiosa, myasthenia gravis, traverse myelitis, primary idiopathic myxedema, nephrosis, ophthalmia symphatica, orchitis granulomatosa, pancreatitis, pemphigus, pemphigus vulgaris, polyarteritis nodosa, polyarthritis chronica primaria, polymyositis, polyradiculitis acuta, psoreasis, purpura, pyoderma gangrenosum, Quervain's thyreoiditis, Reiter's syndrome, sarcoidosis, ataxic sclerosis, progressive systemic sclerosis, scleritis, sclerodermia, multiple sclerosis, sclerosis disseminata, acquired spenic atrophy, infertility due to antispermatozoan antobodies, thrombocytopenia, idiopathic thrombocytopenia purpura, thymoma, acute anterior uveitis, vitiligo, AIDS, HIV, SCID and Epstein Barr virus associated diseases such as Sjorgren's syndrome, virus (AIDS or EBV) associated B cell lymphoma, parasitic diseases such as Lesihmania, and immunosuppressed disease states such as viral infections following allograft transplantations, graft vs. Host syndrome, transplant rejection, or AIDS, cancers, chronic active hepatitis diabetes, toxic chock syndrome, food poisoning, and transplant rejection.  
     
     
         17 . The method of either of claims  15 - 16 , which method comprises simultaneous administration of the chemical compound having selective IK Ca  inhibitory activity and a pharmaceutically effective amount of a conventional immune suppressing agent.  
     
     
         18 . The method according to  claim 17 , wherein the immune-suppressing agent is Amphotericin, Busulphan, Co-trimoxazole, Chlorambucil, colony stimulating factors, corticosteroids, Cyclophosphamide, Fluconazole, folinic acid, Ganciclovir, antilymphocyte immunoglobulins, normal immunoglobulins, Methotrexate, Methylprednisolone, Octreotide, Oxpentifylline, Tacrolimus (FK506), Thalidomide, Zolimomab aritox, and the calcineurin inhibitors (protein phosphatase 2B inhibitors), in particular Cyclosporin.