Methods of using diaminopyrimidine P2X3 and P2X2/3 receptor modulators for treatment of respiratory and gastrointestinal diseases

A method for treating asthma, said method comprising administering to a subject in need thereof a compound selected from the group consisting of:

• 5-(2-Isopropyl-4,5-dimethoxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-(5-Bromo-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-(5-Chloro-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• N2-Benzyl-5-(5-chloro-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-(5-Chloro-2-isopropyl-4-methoxy-phenoxy)-N2(tetrahydro-pyran-4-yl)-pyrimidine-2,4-diamine;
• 5-(5-Chloro-2-isopropyl-4-methoxy-phenoxy)-N2-isopropyl-pyrimidine-2,4-diamine;
• N2-Isopropyl-5-(2-isopropyl-4,5-dimethoxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4,5-dimethoxy-phenoxy)-N2-phenyl-pyrimidine-2,4-diamine;
• N2-Benzyl-5-(2-isopropyl-4,5-dimethoxy-phenoxy)-pyrimidine-2,4-diamine;
• N-[4-Amino-5-(2-isopropyl-4,5-dimethoxy-phenoxy)-pyrimidin-2-yl]-acetamide;
• 5-(2-Isopropyl-4,5-dimethoxy-phenoxy)-N2-(2,2,2-trifluoro-ethyl)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4,5-dimethoxy-phenoxy)-N2-(2-methoxy-ethyl)-pyrimidine-2,4-diamine;
• 3-[4-Amino-5-(5-chloro-2-isopropyl-4-methoxy-phenoxy)-pyrimidin-2-ylamino]-pentane-1,5-diol;
• 2-[4-Amino-5-(5-chloro-2-isopropyl-4-methoxy-phenoxy)-pyrimidin-2-ylamino]-butan-1-ol;
• 1[-5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-phenyl]-ethanone;
• 5-[5-(1H-Imidazol-2-yl)-2-isopropyl-4-methoxy-phenoxy]-pyrimidine-2,4-diamine;
• 5-(5-Chloro-2-isopropyl-4-methoxy-phenoxy)-N2-(3-ethanesulfonyl-1-methyl-propyl)-pyrimidine-2,4-diamine;
• 5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-benzamide;
• 5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-benzoic acid;
• 5-[2-Isopropyl-4-methoxy-5-(1H-tetrazol-5-yl)-phenoxy]-pyrimidine-2,4-diamine;
• 5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-benzonitrile;
• 4-[4-Amino-5-(5-chloro-2-isopropyl-4-methoxy-phenoxy)-pyrimidin-2-ylamino]-piperidine-1-carboxylic acid ethyl ester;
• [5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-phenyl]-urea;
• 5-(5-Chloro-2-isopropyl-4-methoxy-phenoxy)-N2-(1-cyclopropyl-ethyl)-pyrimidine-2,4-diamine;
• 5-(5-Chloro-4-difluoromethoxy-2-isopropyl-phenoxy)-pyrimidine-2,4-diamine;
• 5-(5-Amino-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• N-[5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-phenyl]-acetamide;
• 5-(2-Isopropyl-4-methoxy-5-tetrazol-1-yl-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-(5-Chloro-2-isopropyl-4-methoxy-phenoxy)-N2-(1,1-dioxo-hexahydro-1λ6-thiopyran-4-yl)-pyrimidine-2,4-diamine;
• Methyl-carbamic acid 2-[4-amino-5-(5-chloro-2-isopropyl-4-methoxy-phenoxy)-pyrimidin-2-ylamino]-propyl ester;
• 5-(2-Isopropyl-4,5-dimethoxy-phenoxy)-6-methyl-pyrimidine-2,4-diamine;
• 1-(4-{2-[4-Amino-5-(5-chloro-2-isopropyl-4-methoxy-phenoxy)-pyrimidin-2-ylamino]-propyl}-piperazin-1-yl)-ethanone;
• 5-(5-Chloro-2-isopropyl-4-methoxy-phenoxy)-N2-(1-methanesulfonyl-piperidin-4-yl)-pyrimidine-2,4-diamine;
• 2-[4-Amino-5-(5-chloro-2-isopropyl-4-methoxy-phenoxy)-pyrimidin-2-ylamino]-(R)-propan-1-ol;
• 5-(2-Isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)-N2-(tetrahydro-thiopyran-4-yl)-pyrimidine-2,4-diamine;
• 5-(5-Chloro-2-isopropyl-4-methoxy-phenoxy)-N2-(1,1-dioxo-hexahydro-1λ6-thiopyran-4-yl)-pyrimidine-2,4-diamine;
• 1-[5-(2,4-Diamino-pyrimidin-5-yloxy)-2-hydroxy-4-isopropyl-phenyl]-ethanone;
• 5-(5-Iodo-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-benzenesulfonamide;
• 4-(2,4-Diamino-pyrimidin-5-yloxy)-2-iodo-5-isopropyl-phenol;
• 3-[4-Amino-5-(5-bromo-2-isopropyl-4-methoxy-phenoxy)-pyrimidin-2-ylamino]-pentane-1,5-diol;
• 5-(2-Isopropyl-4methoxy-5-vinyl-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-pyrazol-1-yl-phenoxy)-pyrimidine-2,4-diamine;
• 5-[2-Isopropyl-4-methoxy-5-(3-methyl-pyrazol-1-yl)-phenoxy]-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-oxazol-2-yl-phenoxy)-pyrimidine-2,4-diamine;
• (S)-2-[4-Amino-5-(5-bromo-2-isopropyl-4-methoxy-phenoxy)-pyrimidin-2-ylamino]-butan-1-ol;
• 5-(4-Iodo-2-isopropyl-5-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-(4-Bromo-2-isopropyl-5-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-trifluoromethyl-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-thiazol-4-yl-phenoxy)-pyrimidine-2,4-diamine;
• [4-(2,4-Diamino-pyrimidin-5-yloxy)-2-iodo-5-isopropyl-phenoxy]-acetonitrile;
• 5-(2-Isopropyl-4-methoxy-5-thiophen-3-yl-phenoxy)-pyrimidine-2,4-diamine;
• (R)-2-[4-Amino-5-(2-isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)-pyrimidin-2-ylamino]-butan-1-ol;
• (S)-2-[4-Amino-5-(5-chloro-2-isopropyl-4-methoxy-phenoxy)-pyrimidin-2-ylamino]-propionic acid;
• 5-[5-(4,5-Dihydro-oxazol-2-yl)-2-isopropyl-4-methoxy-phenoxy]-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)-N2-(2,2,2-trifluoro-ethyl)-pyrimidine-2,4-diamine;
• (S)-2-[4-Amino-5-(5-chloro-2-isopropyl-4-methoxy-phenoxy)-pyrimidin-2-ylamino]-propionic acid 3-hydroxy-2-hydroxymethyl-2-methyl-propyl ester;
• 5-[5-(5-Chloro-thiophen-2-yl)-2-isopropyl-4-methoxy-phenoxy]-pyrimidine-2,4-diamine;
• 5-[2-Isopropyl-4-methoxy-5-(1-methyl-1H-imidazol-2-yl)-phenoxy]-pyrimidine-2,4-diamine;
• 5-[2-Isopropyl-4-methoxy-5-(2H-pyrazol-3-yl)-phenoxy]-pyrimidine-2,4-diamine;
• 5-(5-Imidazol-1-yl-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• N2-Isopropyl-5-(2-isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 2-[4-(2,4-Diamino-pyrimidin-5-yloxy)-2-iodo-5-isopropyl-phenoxy]-ethanol;
• 5-(2-Isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)--N2-phenyl-pyrimidine-2,4-diamine;
• 5-(4-Amino-2-ethylamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-benzamide;
• 2-[4-Amino-5-(2-isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)-pyrimidin-2-ylamino]-ethanol;
• 5-[2-Isopropyl-4-methoxy-5-(2-methyl-thiazol-4-yl)-phenoxy]-pyrimidine-2,4-diamine;
• 5-[5-Iodo-2-isopropyl-4-(pyrazin-2-ylmethoxy)-phenoxy]-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)-N2-(2-methoxy-ethyl)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-[1,2,3]triazol-1-yl-phenoxy)-pyrimidine-2,4-diamine;
• 5-(5-Furan-2-yl-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 1-[5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-phenyl]-3-ethyl-urea;
• N2-Cyclopropyl-5-(2-isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 2-[4-(2,4-Diamino-pyrimidin-5-yloxy)-2-iodo-5-isopropyl-phenoxy]-acetamide;
• 5-[5-(3,5-Dimethyl-pyrazol-1-yl)-2-isopropyl-4-methoxy-phenoxy]-pyrimidine-2,4-diamine;
• N2-Benzyl-5-(2-isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• N2-Ethyl-5-(2-isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)-N2-(1-methanesulfonyl-piperidin-4-yl)-pyrimidine-2,4-diamine;
• N2-Isobutyl-5-(2-isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-N-methyl-benzamide;
• 5-(2-Isopropyl-5-isoxazol-5-yl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• N2-(4-Fluoro-phenyl)-5-(2-isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-[1,2,4]oxadiazol-3-yl-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)-N2-(tetrahydro-pyran-4-yl)-pyrimidine-2,4-diamine;
• 1-[5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-phenyl]-ethanol;
• 5-(6-Isopropyl-4-methyl-3,4-dihydro-2H-benzo[1,4]oxazin-7-yloxy)-pyrimidine-2,4-diamine;
• 5-(5-Benzo[b]thiophen-3-yl-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-[2-Isopropyl-4-methoxy-5-(1-methoxy-ethyl)-phenoxy]-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-oxazol-4-yl-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-thiazol-2-yl-phenoxy)-pyrimidine-2,4-diamine;
• 5-(5-Furan-3-yl-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-[5-Iodo-2-isopropyl-4-(pyrimidin-2-ylmethoxy)-phenoxy]-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-thiophen-2-yl-phenoxy)-pyrimidine-2,4-diamine;
• 1-[5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-phenyl]-3-phenyl-urea;
• 5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-N-methyl-benzenesulfonamide;
• 5-(2-Isopropyl-5-methanesulfonyl-4-methoxy-phenoxy)-N2-methyl-pyrimidine-2,4-diamine;
• 5-[5-Iodo-2-isopropyl-4-(pyridin-2-ylmethoxy)-phenoxy]-pyrimidine-2,4-diamine;
• 5-[4-(2-Fluoro-benzyloxy)-5-iodo-2-isopropyl-phenoxy]-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-pyrrol-1-yl-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-trifluoromethoxy-phenoxy)-pyrimidine-2,4-diamine;
• 2-[4-(2,4-Diamino-pyrimidin-5-ylmethyl)-2-iodo-5-isopropyl-phenoxy]-ethanol;
• 5′-(2,4-Diamino-pyrimidin-5-yloxy)-4′-isopropyl-2′-methoxy-biphenyl-3-carbonitrile;
• 5-[2-Isopropyl-4-methoxy-5-(4-methyl-thiophen-2-yl)-phenoxy]-pyrimidine-2,4-diamine;
• 5-(5-Chloro-2-isopropyl-4-methoxy-phenoxy)-N2-[(S)-1-(4-methyl-2,6,7-trioxa-bicyclo[2.2.2]oct-1-yl)-ethyl]-pyrimidine-2,4-diamine;
• 5-(5-Iodo-2-isopropyl-4-prop-2-ynyloxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-nitro-phenoxy)-pyrimidine-2,4-diamin;
• 5-(4-Ethoxy-5-iodo-2-isopropyl-phenoxy)-pyrimidine-2,4-diamine;
• 5-[5-Iodo-2-isopropyl-4-(pyridin-3-ylmethoxy)-phenoxy]-pyrimidine-2,4-diamine;
• 5-(4-Benzyloxy-5-iodo-2-isopropyl-phenoxy)-pyrimidine-2,4-diamine;
• 5-(4-Isopropyl-6-methoxy-biphenyl-3-yloxy)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-thiazol-5-yl-phenoxy)-pyrimidine-2,4-diamine;
• 1-[5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-phenyl]-pyrrolidin-2-one;
• 5-[5-Iodo-2-isopropyl-4-(2-methoxy-ethoxy)-phenoxy]-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-oxazol-5-yl-phenoxy)-pyrimidine-2,4-diamine;
• 5-[5-Iodo-2-isopropyl-4-(2-methoxy-benzyloxy)-phenoxy]-pyrimidine-2,4-diamine;
• 5-[5-Iodo-2-isopropyl-4-(2,2,2-trifluoro-ethoxy)-phenoxy]-pyrimidine-2,4-diamine;
• 5-[5-Iodo-2-isopropyl-4-(3,4,5-trimethoxy-benzyloxy)-phenoxy]-pyrimidine-2,4-diamine;
• 5-[2-Isopropyl-4-methoxy-5-(4-methyl-thiophen-3-yl)-phenoxy]-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-nitro-phenoxy)-pyrimidine-2,4-diamine;
• 5-[5-Iodo-2-isopropyl-4-(1-methyl-piperidin-2-ylmethoxy)-phenoxy]-pyrimidine-2,4-diamine;
• 5-[5-Iodo-2-isopropyl-4-(tetrahydro-pyran-2-ylmethoxy)-phenoxy]-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-[1,2,4]triazol-1-yl-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4,5-dimethoxy-phenoxy)-N2-(2-methoxy-ethyl)-pyrimidine-2,4-diamine;
• 5-(4′-Fluoro-4-isopropyl-6-methoxy-biphenyl-3-yloxy)-pyrimidine-2,4-diamine;
• 5-(5-Chloro-2-isopropyl-4-methoxy-phenoxy)-N2-(2,2,2-trifluoro-ethyl)-pyrimidine-2,4-diamine;
• 5-[2-Isopropyl-4-methoxy-5-(2-methyl-thiazol-5-yl)-phenoxy]-pyrimidine-2,4-diamine;
• 5-(5-Ethanesulfonyl-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 1-[5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-phenyl]-1H-imidazole-2-thiol;
• 5-[2-Isopropyl-4-methoxy-5-(1-methyl-1H-pyrazol-4-yl)-phenoxy]-pyrimidine-2,4-diamine;
• 5-[5-Iodo-2-isopropyl-4-(pyridin-4-ylmethoxy)-phenoxy]-pyrimidine-2,4-diamine;
• 5-(5-Fluoro-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-(4′-Fluoro-5-isopropyl-2-methoxy-biphenyl-4-yloxy)-pyrimidine-2,4-diamine;
• 5-[4-(3-Fluoro-benzyloxy)-5-iodo-2-isopropyl-phenoxy]-pyrimidine-2,4-diamine;
• 5-(4-Furan-2-yl-2-isopropyl-5-methoxy-phenoxy)-pyrimidine-2,4-diamine;
• 2-[5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-phenyl]-propan-2-ol;
• 5-[4-(2,6-Difluoro-benzyloxy)-5-iodo-2-isopropyl-phenoxy]-pyrimidine-2,4-diamine;
• 5-(5-Iodo-2-isopropyl-4-phenethyloxy-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-pyridin-4-yl-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2,4-Diamino-pyrimidin-5-yloxy)-N-ethyl-4-isopropyl-2-methoxy-benzenesulfonamide;
• 5-[2-Isopropyl-5-(4-methanesulfonyl-piperazin-1-yl)-4-methoxy-phenoxy]-pyrimidine-2,4-diamine;
• 5-(2-Isopropyl-4-methoxy-5-pyridin-3-yl-phenoxy)-pyrimidine-2,4-diamine;
• 5-(2,4-Diamino-pyrimidin-5-yloxy)-4-isopropyl-2-methoxy-N,N-dimethyl-benzamide;
• and
• 5-[5-(2,5-Dimethyl-pyrrol-1-yl)-2-isopropyl-4-methoxy-phenoxy]-pyrimidine-2,4-diamine;
• or a pharmaceutically acceptable salt thereof.