Pyrimidine-2,4-diamine derivatives for treatment of cancer

1. A compound of formula I,

or a pharmaceutically acceptable salt thereof, wherein:

R 1 represents:

heteroaryl selected from benzofuran-3-yl, benzothiophen-3-yl, dihydrobenzofuran-7-yl, indol-3-yl, indol-4-yl, indol-5-yl, isoquinolin-4-yl, pyridin-3-yl, pyridin-4-yl, pyrrol-2-yl, and quinolin-5-yl, where the heteroaryl is connected to the pyrimidine of formula I via a carbon atom of the heteroaryl ring, where the heteroaryl is optionally substituted by one or more substituents selected from Y 1 , —C 1-6 alkyl optionally substituted by one or more Y 2 and heterocycloalkyl optionally substituted by one or more Y 3 ; or

aryl represented by

 where

E 3 and E 4 each independently represent hydrogen, and E 1 represents —F and E 2 represent —F, —Cl, —CH 3 or —CF 3 , or E 1 represents —Cl and E 2 represents —F, —Cl, —CH 3 or —CF 3 , or E 1 represents —CH 3 and E 2 represents —F, —Cl, —CH 3 —CF 3 or —CN;

R 2 represents hydrogen;

R 3 represents —C 2-6 alkyl substituted by one Z 1

each Y 1 independently represents halogen, —CN, —C(O)R a , —C(O)N(R b )R c , —C(O)OR d , —N(R e )R f , —N(R g )C(O)R h , —N(R i )C(O)OR j , —N(R k )C(O)N(R l )R m , —NO 2 , —N(R n )S(O) 2 R o , —OR p , —OC(O)R q , —OS(O) 2 R r , —S(O) m R s , —S(O) 2 N(R t )R u , heterocycloalkyl optionally substituted by one or more substituents selected from W 2 , aryl optionally substituted by one or more substituents selected from W 3 , or heteroaryl optionally substituted by one or more substituents selected from W 3 ;

each R a , R b , R c , R d , R e , R g , R h , R i , R k , R l , R m , R n , R p , R q , R s , R t and R u independently represents hydrogen, —C 1-6 alkyl optionally substituted by one or more substituents selected from W 1 , heterocycloalkyl optionally substituted by one or more substituents selected from W 2 , aryl optionally substituted by one or more substituents selected from W 3 , or heteroaryl optionally substituted by one or more substituents selected from W 3 ; or

any two R b and R c , R e and R f , R i and R m and/or R t and R u are linked together to form, along with the nitrogen atom to which they are attached, a 3- to 8-membered monocyclic or bicyclic ring, which ring optionally contains one or two heteroatoms and which ring optionally is substituted by one or more substituents selected from W 2 , C 1-3 alkyl optionally substituted by one or more substituents selected from W 1 , and ═O;

each R f , R j , R o and R r independently represent —C 1-6 alkyl optionally substituted by one or more substituents selected from W 1 , heterocycloalkyl optionally substituted by one or more substituents selected from W 2 , aryl optionally substituted by one or more substituents selected from W 3 or heteroaryl optionally substituted by one or more substituents selected from W 3 ;

each Y 2 independently represents halogen, —CN, —C(O)R b1 , —C(O)N(R c1 )R d1 , —C(O)OR e1 , —N(R f1 )R g1 , —N(R h1 )C(O)R i1 , —N(R j1 )C(O)OR k1 , —N(R l1 )C(O)N(R ml )R n1 , —N(R o1 )S(O) 2 R p1 , —OR q1 , —OC(O)R r1 , —OS(O) 2 R s1 , —S(O) m R t1 , —S(O) 2 N(R u1 )R v1 , heterocycloalkyl optionally substituted by one or more substituents selected from W 1 , aryl optionally substituted by one or more substituents selected from W 2 , heteroaryl optionally substituted by one or more substituents selected from W 2 ;

each Y 3 independently represents halogen, —R a1 , —CN, —C(O)R b1 , —C(O)N(R c1 )R d1 , —C(O)OR e1 , —N(R f1 )R g1 , —N(R h1 )C(O)R i1 , —N(R j1 )C(O)OR k1 , —N(R l1 )C(O)N(R m1 )R n1 , —N(R o1 )S(O) 2 R p1 —OR q1 , —OC(O)R r1 , —OS(O) 2 R s1 , —S(O) m R t1 , —S(O) 2 N(R u1 )R v1 , heterocycloalkyl optionally substituted by one or more substituents selected from W 1 , aryl optionally substituted by one or more substituents selected from W 2 , heteroaryl optionally substituted by one or more substituents selected from W 2 , or ═O;

each R a1 , R b1 , R c1 , R d1 , R e1 , R f1 , R h1 , R i1 , R j1 , R l1 , R m1 , R n1 , R o1 , R q1 , R r1 , R t1 , R u1 , and R v1 independently represents hydrogen, C 1-6 alkyl optionally substituted by one or more substituents selected from W 1 , heterocycloalkyl optionally substituted by one or more substituents selected from W 2 , aryl optionally substituted by one or more substituents selected from W 3 , or heteroaryl optionally substituted by one or more substituents selected from W 3 ; or

any two R c1 and R d1 , R f1 and R g1 , R m1 and R n1 and/or R u1 and R v1 are linked together to form, along with the nitrogen atom to which they are attached, a 3- to 8-membered monocyclic or bicyclic ring, which ring optionally contains one or two heteroatoms and which ring optionally is substituted by one or more substituents selected from W 2 , C 1-3 alkyl optionally substituted by one or more substituents selected from W 1 , and ═O;

each R g1 , R k1 , R p1 and R s1 independently represent —C 1-6 alkyl optionally substituted by one or more substituents selected from W 1 , heterocycloalkyl optionally substituted by one or more substituents selected from W 2 , aryl optionally substituted by one or more substituents selected from W 3 , or heteroaryl optionally substituted by one or more substituents selected from W 3 ;

Z 1 represents —C(O)N(R c2 )R d2 ,

—N(R f2 )R g2 , —N(R h2 )C(O)R i2 , —N(R l2 )C(O)N(R m2 )R n2 ,

—N(R o2 )SO 2 R p2 , —OR q2 , —S(O) m R t2 , —S(O) 2 N(R u2 )R v2 , or aryl represented by

R c2 , R f2 , R h2 , R l2 ,R m2 , R o2 , and R u2 independently represent hydrogen;

R d2 , R g2 , R i2 , R n2 , R p2 , R q2 , R t2 ,and R v2 independently represent aryl optionally substituted by one or more substituents selected from W 6 or heteroaryl optionally substituted by one or more substituents selected from W 6 ;

each W 1 independently represents halogen, —CN, —N(R f3 )R g3 , —N(R h3 )C(O)R i3 , —N(R j3 )C(O)OR k3 , —N(R l3 )C(O)N(R m3 )R n3 , —N(R o3 )S(O) 2 R p3 , —OR q3 , —OC(O)R r3 , —OS(O) 2 R s3 , —S(O) m R t3 , —S(O) 2 N(R u3 )R v3 , heterocycloalkyl optionally substituted by one or more substituents selected from G 1 , aryl optionally substituted by one or more substituents selected from G 2 , heteroaryl optionally substituted by one or more substituents selected from G 2 , or ═O;

each W 2 , W 3 , and W 6 independently represents halogen, —R a3 , —CN, —C(O)R b3 , —C(O)N(R c3 )R d3 , —C(O)OR e3 , —N(R f3 )R g3 , —N(R h3 )C(O)R i3 , —N(R j3 )C(O)OR k3 , —N(R l3 )C(O)N(R m3 )R n3 , —N(R o3 )S(O) 2 R p3 , —OR q3 , —OC(O)R r3 , —OS(O) 2 R s3 , —S(O) m R t3 , —S(O) 2 N(R u3 )R v3 , heterocycloalkyl optionally substituted by one or more substituents selected from G 1 , aryl optionally substituted by one or more substituents selected from G 2 , heteroaryl (optionally substituted by one or more substituents selected from G 2 , or ═O;

W 7 and W 11 each represents hydrogen;

each W 8 and W 10 independently represents hydrogen, halogen, —R a3 , —CN, —C(O)R b3 , —C(O)N(R c3 )R d3 , —C(O)OR e3 , —N(R f3 )R g3 , —N(R h3 )C(O)R i3 ,

—N(R j3 )C(O)OR k3 , —N(R l3 )C(O)N(R m3 )R n3 , —N(R o3 )S(O) 2 R p3 , —OR q3 , —OC(O)R r3 ,

—OS(O) 2 R s3 , —S(O) m R t3 , —S(O) 2 N(R u3 )R v3 , heterocycloalkyl optionally substituted by one or more substituents selected from G 1 , aryl optionally substituted by one or more substituents selected from G 2 , or heteroaryl optionally substituted by one or more substituents selected from G 2 ;

W 9 represents halogen, —R a3 , —CN, —C(O)R b3 , —C(O)N(R c3 )R d3 , —C(O)OR e3 ,

—N(R f3 )R g3 , —N(R h3 )C(O)R i3 , —N(R j3 )C(O)OR k3 , —N(R l3 )C(O)N(R m3 )R n3 ,

—N(R o3 )S(O) 2 R p3 , —OR q3x , —OC(O)R r3 , —OS(O) 2 R s3 , —S(O) m R t3 , —S(O) 2 N(R u3 )R v3 , heterocycloalkyl optionally substituted by one or more substituents selected from G 1 , aryl optionally substituted by one or more substituents selected from G 2 , or heteroaryl optionally substituted by one or more substituents selected from G 2 ;

each R a3 , R b3 , R c3 , R d3 , R e3 , R f3 , R h3 , R i3 , R j3 , R l3 , R m3 , R n3 , R o3 , R q3 , R r3 , R t3 , R u3 and R v3 independently represents hydrogen or C 1-6 alkyl optionally substituted by one or more G 3 ; or

any two R c3 and R d3 , R f3 and R g3 , R m3 and R n3 and/or R u3 and R v3 are linked together to form, along with the nitrogen atom to which they are attached, a 4- to 6-membered ring, which ring optionally contains one heteroatom and which ring optionally is substituted by one or more G 2 ;

each R g3 , R k3 , R p3 , and R s3 independently represents C 1-6 alkyl optionally substituted by one or more G 3 ;

R q3x represents C 2-6 alkyl optionally substituted by one or more G 3 ;

each G 1 and G 2 independently represents halogen, —R a4 , —CN, —C(O)R b4 , —C(O)N(R c4 )R d4 , —C(O)OR e4 , —N(R f4 )R g4 , —N(R h4 )C(O)R i4 , —N(R j4 )C(O)OR k4 , —N(R l4 )C(O)N(R m4 )R n4 , —N(R o4 )S(O) 2 R p4 , —OR q4 , —OC(O)R r4 , —OS(O) 2 R s4 , —S(O) m R t4 , —S(O) 2 N(R u4 )R v4 , or ═O;

G 3 represents halogen, —CN, —C(O)R b4 , —C(O)N(R c4 )R d4 , —C(O)OR e4 , —N(R f4 )R g4 , —N(R h4 )C(O)R i4 , —N(R j4 )C(O)OR k4 , —N(R l4 )C(O)N(R m4 )R n4 , —N(R o4 )S(O) 2 R p4 , —OR q4 , —OC(O)R r4 , —OS(O) 2 R s4 , —S(O) m R t4 , —S(O) 2 N(R u4 )R v4 , or ═O;

each R a4 , R b4 , R c4 , R d4 , R e4 , R f4 , R h4 , R i4 , R j4 , R l4 , R m4 , R n4 , R o4 , R q4 , R r4 , R t4 , R u4 and R v4 independently represents hydrogen or —C 1-6 alkyl optionally substituted by one or more —F; or

any two R c4 and R d4 , R f4 and R g4 , R m4 and R n4 and/or R u4 and R v4 are linked together to form, along with the nitrogen atom to which they are attached, a 3- to 6-membered ring, which ring is optionally substituted by one or more —F, —CH 3 , —CH 2 CH 3 , —CHF 2 , —CF 3 , —CH 2 CF 3 , or ═O;

each R g4 , R k4 , R p4 and R s4 independently represent C 1-6 alkyl optionally substituted by one or more —F;

each m independently represents 0, 1 or 2.

2. A compound as claimed in claim 1 wherein:

R 1 represents benzofuran-3-yl, benzothiophen-3-yl, dihydrobenzofuran-7-yl, indol-3-yl, indol-4-yl, indol-5-yl, isoquinolin-4-yl, pyridin-3-yl, pyridin-4-yl, pyrrol-2-yl and quinolin-5-y.

3. A pharmaceutical formulation comprising a compound as claimed in claim 1 , or a pharmaceutically acceptable salt thereof, in admixture with a pharmaceutically acceptable adjuvant, diluent or carrier.

4. A method of treatment of a disease selected from the group consisting of

soft tissue cancers selected from the group consisting of sarcoma, myxoma, rhabdomyoma, fibroma, lipoma, and teratoma;

lung cancers/diseases selected from the group consisting of bronchogenic carcinoma, alveolar carcinoma, bronchial adenoma, sarcoma, lymphoma, chondromatous hamartoma, and mesothelioma;

gastrointestinal cancers/diseases selected from the group consisting of cancers of the esophagus, stomach, pancreas, small bowel, and large bowel;

genitourinary tract cancers/diseases selected from the group consisting of cancers of the kidney, bladder and urethra, prostate, and testis;

liver cancers/diseases selected from the group consisting of hepatoma, cholangiocarcinoma, hepatoblastoma, angiosarcoma, hepatocellular adenoma, and hemangioma;

bone cancers/diseases selected from the group consisting of osteogenic sarcoma, fibrosarcoma, malignant fibrous histiocytoma, chondrosarcoma, Ewing's sarcoma, malignant lymphoma, multiple myeloma, malignant giant cell tumor chordoma, osteochronfroma, benign chondroma, chondroblastoma, chondromyxofibroma, osteoid osteoma, and giant cell tumors;

nervous system cancers/diseases selected from the group consisting of cancer of the skull, meninges, brain, and spinal cord;

gynecological cancers/diseases selected from the group consisting of uterus, cervix, ovaries, vulva, and vagina;

hematologic cancers;

skin cancers/diseases selected from the group consisting of malignant melanoma, basal cell carcinoma, squamous cell carcinoma, Kaposi's sarcoma, moles dysplastic nevi, lipoma, angioma, dermatofibroma, and keloids;

adrenal glands cancers/diseases, neuroblastoma, neurofibromatosis, head and neck cancers; and breast cancers;

wherein the method comprises administering a therapeutically effective amount a compound as claimed in claim 1 , or a pharmaceutically acceptable salt thereof, to a patient in need of such treatment; and

wherein the treatment does not comprise prevention or prophylaxis.

5. A method as claimed in claim 4 , wherein the disease is selected from the group consisting of breast cancers, prostate cancers, lung cancers, oesophageal cancers, colon cancers, brain cancers, skin cancers, ovarian cancers, testicular cancers, neurofibromatosis and leukemias.

6. A combination product comprising:

(A) a compound as claimed in claim 1 , or a pharmaceutically acceptable salt thereof; and

(B) one or more other therapeutic agent(s) that is/are useful in the treatment of a disease,

wherein each one of components (A) and (B) is formulated in admixture with a pharmaceutically-acceptable adjuvant, diluent or carrier; and

wherein the treatment does not comprise prevention or prophylaxis;

wherein the disease is selected from the group consisting of

soft tissue cancers selected from the group consisting of sarcoma, myxoma, rhabdomyoma, fibroma, lipoma, and teratoma;

lung cancers/diseases selected from the group consisting of bronchogenic carcinoma, alveolar carcinoma, bronchial adenoma, sarcoma, lymphoma, chondromatous hamartoma, and mesothelioma;

gastrointestinal cancers/diseases selected from the group consisting of cancers of the esophagus, stomach, pancreas, small bowel, and large bowel;

genitourinary tract cancers/diseases selected from the group consisting of cancers of the kidney, bladder and urethra, prostate, and testis;

liver cancers/diseases selected from the group consisting of hepatoma, cholangiocarcinoma, hepatoblastoma, angiosarcoma, hepatocellular adenoma, and hemangioma;

bone cancers/diseases selected from the group consisting of osteogenic sarcoma, fibrosarcoma, malignant fibrous histiocytoma, chondrosarcoma, Ewing's sarcoma, malignant lymphoma, multiple myeloma, malignant giant cell tumor chordoma, osteochronfroma, benign chondroma, chondroblastoma, chondromyxofibroma, osteoid osteoma, and giant cell tumors;

nervous system cancers/diseases selected from the group consisting of cancer of the skull, meninges, brain, and spinal cord;

gynecological cancers/diseases selected from the group consisting of uterus, cervix, ovaries, vulva, and vagina;

hematologic cancers;

skin cancers/diseases selected from the group consisting of malignant melanoma, basal cell carcinoma, squamous cell carcinoma, Kaposi's sarcoma, moles dysplastic nevi, lipoma, angioma, dermatofibroma, and keloids;

adrenal glands cancers/diseases, neuroblastoma, neurofibromatosis, head and neck cancers; and breast cancers.

7. A combination product as claimed in claim 6 , wherein component (B) is selected from the group consisting of anti-microtubule agents, platinum coordination complexes, alkylating agents, antibiotic agents, topoisomerase II inhibitors, antimetabolites, topoisomerase I inhibitors, hormones and hormonal analogues, signal transduction pathway inhibitors; kinase inhibitors; angiogenesis inhibitors; immunotherapeutic agents; pro-apoptotic agents; and cell cycle signaling inhibitors.

8. A compound as claimed in claim 1 wherein:

Z 1 represents

W 7 and W 11 are hydrogen; and

(a) W 8 and W 10 are independently selected from hydrogen, —F, —Cl, —CH 3 , —CN, —CF 3 ; and

W 9 is selected from —R a3 , —CN, —C(O)R b3 , —C(O)N(R c3 )R d3 , —C(O)OR e3 , —N(R f3 )R g3 , —N(R h3 )C(O)R i3 , —N(R j3 )C(O)OR k3 , —N(R l3 )C(O)N(R m3 )R n3 , —N(R o3 )S(O) 2 R p3 , —OR q3x , —OC(O)R r3 , —OS(O) 2 R s3 , —S(O) m R t3 , —S(O) 2 N(R u3 )R v3 , heterocycloalkyl optionally substituted by one or more substituents selected from aryl optionally substituted by one or more substituents selected from G 2 , or heteroaryl optionally substituted by one or more substituents selected from G 2 ; or

(b) W 9 and W 10 are independently selected from hydrogen, —F, —Cl, —CH 3 , —CN, —CF 3 ; and

W 8 is selected from —R a3 , —CN, —C(O)R b3 , —C(O)N(R c3 )R d3 , —C(O)OR e3 , —N(R f3 )R g3 , —N(R h3 )C(O)R i3 , —N(R j3 )C(O)OR k3 , —N(R l3 )C(O)N(R m3 )R n3 , —N(R o3 )S(O) 2 R p3 , —OR q3x , —OC(O)R r3 , —OS(O) 2 R s3 , —S(O) m R t3 , —S(O) 2 N(R u3 )R v3 , heterocycloalkyl optionally substituted by one or more

substituents selected from G 1 , aryl optionally substituted by one or more substituents selected from G 2 , or heteroaryl optionally substituted by one or more substituents selected from G 2 .

9. A compound as claimed in claim 1 , wherein:

W 8 and W 10 each independently represents hydrogen; and

W 9 represents —F, —Cl, —CH 3 , cyclopropyl, —CF 3 , —CN, —NH 2 , —N(CH 3 ) 2 , —N(H)C(O)CH 3 , —N(H)C(O)OC(CH 3 ) 3 , —SO 2 CH 3 , —SO 2 NH 2 , —S(O) 2 N(CH 3 ) 2 , —S(O) 2 -4-morpholinyl, 4-methylpiperazin-1-yl, 4-methylpiperidin-1-ylmethyl or 1,2,3-thiadiazol-4-yl.

10. A compound as claimed in claim 1 , selected from:

4-N-[2-(4-chlorophenyl)ethyl]-6-(2,3-dichlorophenyl)pyrimidine-2,4-diamine;

4-(2-{[2-amino-6-(2,3-dichlorophenyl)pyrimidin-4-yl]amino}ethyl)benzene-1-sulfonamide;

4-(2-{[2-amino-6-(3-chloro-2-methylphenyl)pyrimidin-4-yl]amino}ethyl)benzene-1-sulfonamide;

4-(2-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)benzene-1-sulfonamide;

6-(2,3-dimethylphenyl)-4-N-[2-(4-methanesulfonylphenyl)ethyl]pyrimidine-2,4-diamine;

4-(2-{[2-amino-6-(3-chloro-2-methylphenyl)pyrimidin-4-yl]amino}ethyl)-N,N-dimethylbenzene-1-sulfonamide;

4-(2-{[2-amino-6-(2,3-dichlorophenyl)pyrimidin-4-yl]amino}ethyl)-N,N-dimethylbenzene-1-sulfonamide;

4-(2-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)-N,N-dimethylbenzene-1-sulfonamide;

6-[(2-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)amino]pyridine-3-sulfonamide;

6-(2,3-dichlorophenyl)-4-N-[2-(4-methanesulfonylphenyl)ethyl]pyrimidine-2,4-diamine; and

4-[(2-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)amino]benzene-1-sulfonamide,

or a pharmaceutically acceptable salt thereof.

11. A compound as claimed in claim 1 , selected from:

6-(2,3-dimethylphenyl)-4-N-(2-phenylethyl)pyrimidine-2,4-diamine;

6-(2,3-dimethylphenyl)-4-N-[2-(4-methoxyphenyl)ethyl]pyrimidine-2,4-diamine;

6-(2,3-dimethylphenyl)-4-N-[2-(4-methylphenyl)ethyl]pyrimidine-2,4-diamine;

4-N-[2-(4-chlorophenyl)ethyl]-6-(2,3-dimethylphenyl)pyrimidine-2,4-diamine;

6-(2, 3-dimethylphenyl)-4-N-(2-phenylpropyl)pyrimidine-2,4-diamine;

6-(2, 3-dimethylphenyl)-4-N-(3-phenylpropyl)pyrimidine-2,4-diamine;

6-(2, 3-dimethylphenyl)-4-N-(2-phenoxyethyl)pyrimidine-2,4-diamine;

6-(2,3-dimethylphenyl)-4-N-[2-(phenylamino)ethyl]pyrimidine-2,4-diamine;

6-(2-chloro-3-methylphenyl)-4-N-[2-(4-chlorophenyl)ethyl]pyrimidine-2,4-diamine;

4-N-[2-(4-chlorophenyl)ethyl]-6-(1H-indol-4-yl)pyrimidine-2,4-diamine;

6-(3-chloro-2-methylphenyl)-4-N-[(1R)-1-phenylethyl]pyrimidine-2,4-diamine;

6-(3-chloro-2-methylphenyl)-4-N-(2-phenylpropan-2-yl)pyrimidine-2,4-diamine;

4-N-[2-(2-chlorophenoxy)ethyl]-6-(2,3-dimethylphenyl)pyrimidine-2,4-diamine;

6-(2,3-dimethylphenyl)-4-N-[2-(pyridin-3-yloxy)propyl]pyrimidine-2,4-diamine;

4-N-[2-(4-chlorophenyl)ethyl]-6-(2,3-dichlorophenyl)pyrimidine-2,4-diamine;

4-N-[2-(4-chlorophenyl)ethyl]-6-(quinolin-5-yl)pyrimidine-2,4-diamine;

4-N-[2-(4-chlorophenyl)cyclopropyl]-6-(2,3-dimethylphenyl)pyrimidine-2,4-diamine;

3-(2-{[2-amino-6-(2, 3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)phenol;

4-N-{[1-(4-chlorophenyl)cyclopropyl]methyl}-6-(2,3-dimethylphenyl)pyrimidine-2,4-diamine;

4-(2-{[2-amino-6-(2,3-dichlorophenyl)pyrimidin-4-yl]amino}ethyl)benzene-1-sulfonamide;

4-(2-{[2-amino-6-(3-chloro-2-methylphenyl)pyrimidin-4-yl]amino}ethyl)benzene-1-sulfonamide;

4-(2-{[2-amino-6-(2,3-dichlorophenyl)pyrimidin-4-yl]amino}ethyl)phenol;

4-(2-{[2-amino-6-(2, 3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)benzene-1-sulfonamide;

6-(2,3-dimethylphenyl)-4-N-[2-(4-methanesulfonylphenyl)ethyl]pyrimidine-2,4-diamine;

4-(2-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)benzonitrile,

4-(2-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)benzonitrile,

4-N-[2-(3-chlorophenyl)ethyl]-6-(2, 3-dimethylphenyl)pyrimidine-2,4-diamine;

4-N-[2-(4-chlorophenyl)propyl]-6-(2,3-dimethylphenyl)pyrimidine-2,4-diamine;

6-(2,3-dimethylphenyl)-4-N-[2-(4-fluorophenyl)ethyl]pyrimidine-2,4-diamine;

4-N-[2-(benzenesulfonyl)ethyl]-6-(2,3-dimethylphenyl)pyrimidine-2,4-diamine;

N-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)-4-chlorobenzene-1-sulfonamide;

3-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)-1-(4-chlorophenyl)urea;

N-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)-3,5-dimethyl-1,2-oxazole-4-sulfonamide;

3-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)-1-(2,6-dichloropyridin-4-yl)urea;

3-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)-1-(3,4-difluorophenyl)urea;

N-[3-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propoxy)phenyl]acetamide;

N-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)-3-bromobenzamide;

N-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)benzamide;

N-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)-3-cyanobenzene-1-sulfonamide;

N-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)-4-methanesulfonylbenzene-1-sulfonamide;

N-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)benzenesulfonamide;

N-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}-2,2-dimethylpropyl)-3-fluorobenzene-1-sulfonamide;

N-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}-2,2-dimethylpropyl)-4-(morpholine-4-sulfonyl)benzene-1-sulfonamide;

N-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)-3-fluorobenzene-1-sulfonamide;

N-{4-[(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)sulfamoyl]phenyl}acetamide;

N-(2-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)-3-fluorobenzene-1-sulfonamide;

N-(2-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)-4-methoxybenzene-1-sulfonamide;

N-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)-4, 5-dichlorothiophene-2-sulfonamide;

N-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)-5-chloro-1,3-dimethyl-1H-pyrazole-4-sulfonamide;

N-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)-1,2-dimethyl-1H-imidazole-4-sulfonamide;

N-(2-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)-5-chloro-1,3-dimethyl-1H-pyrazole-4-sulfonamide;

4-N-{2-[(1,3-benzoxazol-2-yl)amino]ethyl}-6-(2,3-dimethylphenyl)pyrimidine-2,4-diamine;

6-(2,3-dimethylphenyl)-4-N-(4-phenylbutan-2-yl)pyrimidine-2,4-diamine;

6-[(2-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)amino]pyridine-3-carbonitrile,

4-N-{2-[(3-bromo-1,2,4-thiadiazol-5-yl)amino]ethyl}-6-(2,3-dimethylphenyl)pyrimidine-2,4-diamine;

N-(2-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)-4-methanesulfonylbenzene-1-sulfonamide;

N-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)-3-methanesulfonylbenzene-1-sulfonamide;

N-(3-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)-2-methanesulfonylbenzene-1-sulfonamide;

4-(2-{[2-amino-6-(3-chloro-2-methylphenyl)pyrimidin-4-yl]amino}ethyl)-N,N-dimethylbenzene-1-sulfonamide;

4-(2-{[2-amino-6-(2,3-dichlorophenyl)pyrimidin-4-yl]amino}ethyl)-N,N-dimethylbenzene-1-sulfonamide;

4-(2-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)-N,N-dimethylbenzene-1-sulfonamide;

4-N-{1-[(4-chlorophenyl)methyl]cyclopropyl-dimethylphenyl)pyrimidine-2,4-diamine;

4-N-[2-(4-chlorophenyl)ethyl]-6-(1H-pyrrol-2-yl)pyrimidine-2,4-diamine;

N-(4-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}butyl)-4-methanesulfonylbenzene-1-sulfonamide;

4-(2-[2-amino-6-(3-cyano-2-methylphenyl)pyrimidin-4-yl]amino}ethyl)benzene-1-sulfonamide;

4-N-{2-[(6-chloropyridazin-3-yl)amino]ethyl}-6-(2,3-dimethylphenyl)pyrimidine-2,4-diamine;

2-[(2-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)amino]pyridine-4-carbonitrile,

6-[(2-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)amino]pyridine-3-sulfonamide;

1-N-(3-{[2-amino-6-(2, 3-dimethylphenyl)pyrimidin-4-yl]amino}propyl)benzene-1,4-disulfonamide;

6-(2,3-dichlorophenyl)-4-N-[2-(4-methanesulfonylphenyl)ethyl]pyrimidine-2,4-diamine;

6-(2,3-dimethylphenyl)-4-N-{2-[(3-methoxyphenyl)amino]ethyl}pyrimidine-2,4-diamine;

6-(2,3-dimethylphenyl)-4-N-{2-[(3-fluoro-4-methylphenyl)amino]ethyl}pyrimidine-2,4-diamine;

4-N-{2-[(3,4-dichlorophenyl)amino]ethyl}-6-(2,3-dimethylphenyl)pyrimidine-2,4-diamine;

4-N-{2-[(5-chloropyridin-2-yl)amino]ethyl}-6-(2,3-dimethylphenyl)pyrimidine-2,4-diamine;

4-N-{2-[(5-bromopyridin-2-yl)amino]ethyl}-6-(2,3-dimethylphenyl)pyrimidine-2,4-diamine;

4-[(2-{[2-amino-6-(2,3-dimethylphenyl)pyrimidin-4-yl]amino}ethyl)amino]benzene-1-sulfonamide;

and

6-(2,3-dimethylphenyl)-4-N-{2-[(pyridin-3-yl)amino]ethyl}pyrimidine-2,4-diamine;

or a pharmaceutically acceptable salt thereof.