Quinazolinones as bromodomain inhibitors

1. A method for inhibiting BET protein function in a mammal, comprising administering a therapeutically effective amount of a compound of Formula I:

or a stereoisomer, tautomer, or pharmaceutically acceptable salt thereof,

wherein:

W 1 is selected from N and CR 1 ;

W 2 is selected from N and CR 2 ;

W 3 is selected from N and CR 3 ;

W 4 is selected from N and CR 4 ;

X is selected from N and CH;

Y is selected from —S(O)—, —NH—, —NHCH 2 —, —NHCH 2 CH 2 —, and —NHCH 2 CH 2 CH 2 —,

wherein if Y is —NH—, —NHCH 2 —, —NHCH 2 CH 2 —, or —NHCH 2 CH 2 CH 2 —, then the nitrogen is attached to the B ring, and one or more hydrogens may be optionally substituted with alkyl(C 1 -C 3 ), halogen, hydroxyl, or amino;

R 1 , R 2 , R 3 , and R 4 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, alkoxy, amino, aryloxy, aryl, hydroxyl, and halogen,

wherein each alkyl and alkoxy may be optionally substituted with hydroxyl, amino, or halogen,

wherein each aryl and aryloxy may be optionally substituted with halogen, alkoxy, or amino, and

wherein two adjacent substituents selected from R 1 , R 2 , R 3 , and R 4 may be connected in a 5- or 6-membered ring to form a bicyclic carbocycle or bicyclic heterocycle;

R 5 is selected from amino and 5- and 6-membered carbocycles and heterocycles;

R 6 is selected from hydrogen, alkoxy, alkyl, halogen, aminoalkyl, and thioalkyl;

R 7 is selected from hydrogen, alkyl, alkoxy, thioalkyl, aminoalkyl, and halogen;

and wherein said mammal is afflicted with a cancer selected from B-acute lymphocytic leukemia, Burkitt's lymphoma, diffuse large cell lymphoma, multiple myeloma, primary plasma cell leukemia, atypical carcinoid lung cancer, bladder cancer, breast cancer, cervix cancer, colon cancer, gastric cancer, glioblastoma, hepatocellular carcinoma, large cell neuroendocrine carcinoma, medulloblastoma, melanoma, neuroblastoma, esophageal cancer, osteosarcoma, ovarian cancer, prostate cancer, renal carcinoma, retinoblastoma, rhabdomyosarcoma, small cell lung carcinoma, NUT midline carcinoma, B-cell lymphoma, non-small cell lung cancer, head and neck squamous cell carcinoma, chronic lymphocytic leukemia, follicular lymphoma, diffuse large B cell lymphoma with germinal center phenotype, Hodgkin's lymphoma, activated anaplastic large cell lymphoma, primary neuroectodermal tumor, pancreatic cancer, adenoid cystic carcinoma, T-cell prolymphocytic leukemia, malignant glioma, thyroid cancer, Barrett's adenocarcinoma, hepatoma, pro-myelocytic leukemia, and mantle cell lymphoma.

2. The method of claim 1 , wherein the compound is a compound of Formula Ia:

or a stereoisomer, tautomer, or pharmaceutically acceptable salt thereof,

wherein:

X is selected from N and CH;

Y is selected from —S(O)—, —NH—, —NHCH 2 —, —NHCH 2 CH 2 —, and —NHCH 2 CH 2 CH 2 —,

wherein if Y is —NH—, —NHCH 2 —, —NHCH 2 CH 2 —, or —NHCH 2 CH 2 CH 2 —, then the nitrogen is attached to the B ring, and one or more hydrogens may be optionally substituted with alkyl(C 1 -C 3 ), halogen, hydroxyl, or amino;

R 1 and R 3 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, alkoxy, amino, aryloxy, aryl, hydroxyl, and halogen,

wherein each alkyl and alkoxy may be optionally substituted with hydroxyl, amino, or halogen,

wherein each aryl and aryloxy may be optionally substituted with halogen, alkoxy, or amino;

R 5 is selected from amino and 5- and 6-membered carbocycles and heterocycles;

wherein the 5- and 6-membered carbocycles and heterocycles are selected from:

wherein the 5- and 6-membered carbocycles and heterocycles may be optionally substituted with halogen, amino, amide, alkyl(C 1 -C 6 ), or alkoxy(C 1 -C 6 );

and wherein Ra is selected from hydrogen, methyl, ethyl, propyl, isopropyl, t-butyl, —C(O)Me, —C(O)Pr, —C(O)iPr, benzyl, —C(O)CF 3 , —C(O)-tBu, —C(O)NHiPr, —C(O)NMe 2 , —C(O)NHEt, —C(O)NH 2 , —C(O)CH(OH)CH 3 , —C(O)C(O)OMe, —CF 3 , —CH 2 CH 2 OH, —CH 2 CH 2 —, amino, and —CH 2 CH 2 C(Me) 2 OH;

R 6 is selected from hydrogen, alkoxy, alkyl, halogen, aminoalkyl, and thioalkyl; and

R 7 is selected from hydrogen, alkyl, alkoxy, thioalkyl, aminoalkyl, and halogen.

3. The method of claim 2 , wherein X is N.

4. The method of claim 2 , wherein R 1 and R 3 are each independently an alkoxy group.

5. The method of claim 4 , wherein R 1 and R 3 are each independently selected from methoxy, ethoxy, isopropoxy, and propoxy.

6. The method of claim 5 , wherein R 1 and R 3 are each methoxy.

7. The method of claim 2 , wherein R 1 is methoxy and R 3 is amino.

8. The method of claim 2 , wherein Y is selected from —NH—, —NHCH 2 —, —NHCH 2 CH 2 —, and —NHCH 2 CH 2 CH 2 —, wherein the nitrogen attached to the B ring, and wherein one or more hydrogens may be optionally substituted with F, Me, or Cl.

9. The method of claim 8 , wherein Y is —NH—.

10. The method of claim 2 , wherein R 5 is selected from —NHRa and 5- and 6-membered carbocycles and heterocycles;

wherein the 5- and 6-membered carbocycles and heterocycle are selected from:

wherein the 5- and 6-membered carbocycles and heterocycles may be optionally substituted with halogen, amino, amide, alkyl(C 1 -C 6 ), or alkoxy(C 1 -C 6 );

and wherein Ra is selected from hydrogen, methyl, ethyl, propyl, isopropyl, t-butyl, —C(O)Me, —C(O)Pr, —C(O)iPr, benzyl, —C(O)CF 3 , —C(O)-tBu, —C(O)NHiPr, —C(O)NMe 2 , —C(O)NHEt, —C(O)NH 2 , —C(O)CH(OH)CH 3 , —C(O)C(O)OMe, —CF 3 , —CH 2 CH 2 OH, —CH 2 CH 2 -amino, and —CH 2 CH 2 C(Me) 2 OH.

11. The method of claim 2 , wherein R 6 is selected from hydrogen, methyl, and methoxy.

12. The method of claim 2 , wherein R 6 is selected from groups of Formula II:

wherein:

D is selected from O, N, and S;

E is independently selected from O and N;

R 8 is selected from hydrogen and alkyl,

wherein R 8 is present only if D is N;

R 9 and R 10 are independently selected from hydrogen, alkyl, and cycloalkyl,

wherein only one of R 9 and R 10 is present if E is O;

R 9 and R 10 may be connected to form a heterocycle containing one or more heteroatoms; and

n is selected from 1, 2, and 3.

13. The method of claim 12 , wherein R 6 is selected from:

14. The method of claim 2 , wherein:

R 1 and R 3 are each alkoxy;

Y is selected from —NH—, —NHCH 2 —, —NHCH 2 CH 2 —, and —NHCH 2 CH 2 CH 2 —,

wherein the nitrogen is attached to the B ring;

R 5 is selected from —NHRa and 5- and 6-membered carbocycles and heterocycles,

wherein the 5- and 6-membered carbocycles and heterocycles are selected from:

wherein Ra is selected from hydrogen, methyl, ethyl, propyl, isopropyl, t-butyl, —C(O)Me, —C(O)Pr, —C(O)iPr, benzyl, —C(O)CF 3 , —C(O)-tBu, —C(O)NHiPr, —C(O)NMe 2 , —C(O)NHEt, —C(O)NH 2 , —C(O)CH(OH)CH 3 , —C(O)C(O)OMe, —CF 3 , —CH 2 CH 2 OH, —CH 2 CH 2 amino, and —CH 2 CH 2 C(Me) 2 OH; and

R 6 is selected from hydrogen, methyl, and alkoxy,

wherein the alkoxy is optionally substituted with hydroxyl or amino.

15. The method of claim 2 , wherein:

R 1 is alkoxy;

R 3 is amino;

Y is selected from —NH—, —NHCH 2 —, —NHCH 2 CH 2 —, and —NHCH 2 CH 2 CH 2 —,

wherein the nitrogen is attached to the B ring;

R 5 is selected from —NHRa and 5- and 6-membered carbocycles and heterocycles,

wherein the 5- and 6-membered carbocycles and heterocycles are selected from:

wherein Ra is selected from hydrogen, methyl, ethyl, propyl, isopropyl, t-butyl, —C(O)Me, —C(O)Pr, —C(O)iPr, benzyl, —C(O)CF 3 , —C(O)-tBu, —C(O)NHiPr, —C(O)NMe 2 , —C(O)NHEt, —C(O)NH 2 , —C(O)CH(OH)CH 3 , —C(O)C(O)OMe, —CF 3 , —CH 2 CH 2 OH, —CH 2 CH 2 amino, and —CH 2 CH 2 C(Me) 2 OH; and

R 6 is selected from hydrogen, methyl, and alkoxy,

wherein the alkoxy is optionally substituted with hydroxyl or amino.

16. The method of claim 1 , wherein the cancer:

(a) exhibits overexpression, translocation, amplification, or rearrangement of a myc family oncoprotein;

(b) results from aberrant regulation of BET proteins;

(c) relies on pTEFb (Cdk9/cyclin T) and BET proteins to regulate oncogenes;

(d) is associated with upregulation of BET responsive genes CDK6, Bcl2, TYRO3, MYB and/or hTERT; and/or

(e) is associated with a viral infection.

17. The method of claim 16 , wherein:

(a) the cancer exhibiting overexpression, translocation, amplification, or rearrangement of a myc family oncoprotein is selected from B-acute lymphocytic leukemia, Burkitt's lymphoma, diffuse large cell lymphoma, multiple myeloma, primary plasma cell leukemia, atypical carcinoid lung cancer, bladder cancer, breast cancer, cervix cancer, colon cancer, gastric cancer, glioblastoma, hepatocellular carcinoma, large cell neuroendocrine carcinoma, medulloblastoma, Nodular melanoma, Superficial spreading melanoma, neuroblastoma, esophageal squamous cell carcinoma, osteosarcoma, ovarian cancer, prostate cancer, renal clear cell carcinoma, retinoblastoma, rhabdomyosarcoma, and small cell lung carcinoma;

(b) the cancer resulting from aberrant regulation of BET proteins is selected from NUT midline carcinoma, B-cell lymphoma, non-small cell lung cancer, esophageal cancer, head and neck squamous cell carcinoma, and colon cancer;

(c) the cancer relying on pTEFb (Cdk9/cyclin T) and BET proteins to regulate oncogenes is selected from chronic lymphocytic leukemia, multiple myeloma, follicular lymphoma, diffuse large B cell lymphoma with germinal center phenotype, Burkitt's lymphoma, Hodgkin's lymphoma, anaplastic large cell lymphoma, neuroblastoma, primary neuroectodermal tumor, rhabdomyosarcoma, prostate cancer, and breast cancer;

(d) the cancer associated with upregulation of BET responsive genes CDK6, Bcl2, TYRO3, MYB, and hTERT is selected from pancreatic cancer, breast cancer, colon cancer, glioblastoma, adenoid cystic carcinoma, T-cell prolymphocytic leukemia, malignant glioma, bladder cancer, medulloblastoma, thyroid cancer, melanoma, multiple myeloma, Barrett's adenocarcinoma, hepatoma, prostate cancer, pro-myelocytic leukemia, chronic lymphocytic leukemia, mantle cell lymphoma, diffuse large B-cell lymphoma, small cell lung cancer, and renal carcinoma; and/or

(e) the viral infection is selected from Epstein-Barr Virus, hepatitis B virus, hepatitis C virus, Kaposi's sarcoma associated virus, human papilloma virus, Merkel cell polyomavirus, and human cytomegalovirus.

18. The method of claim 1 , wherein the compound of Formula I is administered in combination with another anticancer agent.

19. The method of claim 18 , wherein the anticancer agent is selected from ABT-737, Azacitidine (Vidaza), AZD1152 (Barasertib), AZD2281 (Olaparib), AZD6244 (Selumetinib), BEZ235, Bleomycin Sulfate, Bortezomib (Velcade), Busulfan (Myleran), Camptothecin, Cisplatin, Cyclophosphamide (Clafen), CYT387, Cytarabine (Ara-C), Dacarbazine, DAPT (GSI-IX), Decitabine, Dexamethasone, Doxorubicin (Adriamycin), Etoposide, Everolimus (RAD001), Flavopiridol (Alvocidib), Ganetespib (STA-9090), Gefitinib (Iressa), Idarubicin, Ifosfamide (Mitoxana), IFNa2a (Roferon A), Melphalan (Alkeran), Methazolastone (temozolomide), Metformin, Mitoxantrone (Novantrone), Paclitaxel, Phenformin, PKC412 (Midostaurin), PLX4032 (Vemurafenib), Pomalidomide (CC-4047), Prednisone (Deltasone), Rapamycin, Revlimid (Lenalidomide), Ruxolitinib (INCB018424), Sorafenib (Nexavar), SU11248 (Sunitinib), SU11274, Vinblastine, Vincristine (Oncovin), Vinorelbine (Navelbine), Vorinostat (SAHA), and WP1130 (Degrasyn).

20. A method for inhibiting BET protein function in a mammal, comprising administering a therapeutically effective amount of a compound selected from:

5,7-Dimethoxy-2-(4-methoxy-2-((1-methylpiperidin-4-yl)amino)phenyl)-quinazolin-4(3H)-one;

5,7-Dimethoxy-2-(4-methoxy-2-(4-methylpiperazine-1-carbonyl)phenyl) quinazolin-4(3H)-one;

2-(2-((1-isopropylpiperidin-4-yl)amino)-4-methoxyphenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

5,7-Dimethoxy-2-(4-methoxy-2-((1-methylpyrrolidin-3-yl)amino)phenyl)quinazolin-4(3H)-one;

5,7-Dimethoxy-2-(4-methoxy-2-(methyl(1-methylpiperidin-4-yl)amino)phenyl) quinazolin-4(3H)-one;

5,7-Dimethoxy-2-(4-methoxy-2-(((1-methylpiperidin-4-yl)methyl)amino)phenyl) quinazolin-4(3H)-one;

5,7-Dimethoxy-2-(4-methoxy-2-(((1-methylpyrrolidin-3-yl)methyl)amino)phenyl)-quinazolin-4(3H)-one;

2-(2-((2-(Isopropylamino)ethyl)amino)-4-methoxyphenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

5,7-dim ethoxy-2-(4-Methoxy-2-((tetrahydro-2H-pyran-4-yl)amino)-phenyl)quinazolin-4(3H)-one;

2-(2-((1-Isopropylpiperidin-4-yl)amino)phenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

5,7-Dimethoxy-2-(4-methoxy-2-((2-(pyrrolidin-1-yl)ethyl)amino)phenyl)quinazolin-4(3H)-one;

5,7-Dimethoxy-2-(4-methoxy-2-((2-(piperidin-1-yl)ethyl)amino)-phenyl)quinazolin-4(3H)-one;

5,7-Dimethoxy-2-(4-methoxy-2-((3-morpholinopropyl)amino)-phenyl)quinazolin-4(3H)-one;

5,7-Dimethoxy-2-(4-methoxy-2-((2-morpholinoethyl)amino)phenyl)-quinazolin-4(3H)-one;

5,7-Dimethoxy-2-(4-methoxy-2-((3-(pyrrolidin-1-yl)propyl)amino)phenyl)quinazolin-4(3H)-one;

2-(2-(((1-Isopropylpyrrolidin-3-yl)methyl)amino)-4-methoxyphenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(2-(((1-Isopropylpyrrolidin-2-yl)methyl)amino)-4-methoxyphenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(3-((1-Isopropylpiperidin-4-yl)amino)pyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(2-((1-Isobutyrylpiperidin-4-yl)amino)-4-methoxyphenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(2-((3-(Isopropylamino)propyl)amino)-4-methoxyphenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

5,7-Dimethoxy-2-(4-methoxy-2-j(3-(4-methylpiperazin-1-yl)propyl)amino)-phenyl)quinazolin-4(3H)-one;

2-(2-((2-(4-Isopropylpiperazin-1-yl)ethyl)amino)-4-methoxyphenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

5,7-Dimethoxy-2-[4-methoxy-2-(1-methylpiperidin-4-ylsulfinyl)phenyl]quinazolin-4(3H)-one;

5,7-Dimethoxy-2-(4-methoxy-2-((2-(piperazin-1-yl)ethyl)amino)phenyl)quinazolin-4(3H)-one;

5,7-Dimethoxy-2-(4-methoxy-2-((2-(4-methylpiperazin-1-yl)ethyl)amino)phenyl)-quinazolin-4(3H)-one;

2-(2-((1-Isopropylpiperidin-4-yl)amino)-5-methoxyphenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(3-((1-Isopropylpiperidin-4-yl)amino)phenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

5,7-Dimethoxy-2-(4-methoxy-2-[3-(piperazin-1-yl)propylamino]phenyl)quinazolin-4(3H)-one;

2-(2-((4,4-Dimethylcyclohexyl)amino)-4-methoxyphenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(3-((1-Isopropylpiperidin-4-yl)amino)-5-methoxypyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(2-((trans-4-(2-Hydroxypropan-2-yl)cyclohexyl)amino)-4-m ethoxyphenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(3-((1-Isobutyrylpiperidin-4-yl)amino)-5-methoxypyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(4-Chloro-2-((1-isopropylpiperidin-4-yl)amino)phenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(4-Chloro-2-((1-isobutyrylpiperidin-4-yl)amino)phenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(2-((1-Benzylpiperidin-4-yl)amino)-4-methoxyphenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(-((1-Isobutyrylpiperidin-4-yl)amino)pyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(3-((1-Acetylpiperidin-4-yl)amino)pyridine-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one;

N-(cis-4-((2-(5,7-Dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)-5-methoxypyridin-3-yl)amino)cyclohexyl)isobutyramide;

2-(2-((1-Acetylpiperidin-4-yl)amino)-4-methoxyphenyl)-5,7-dimethoxyquinazolin-4(3H)-one;

5,7-Dimethoxy-2-(5-methoxy-3-((1-methylpiperidin-4-yl)amino)pyridin-2-yl)quinazolin-4(3H)-one;

5,7-Dimethoxy-2-(3-(((1-methylpyrrolidin-3-yl)methyl)amino)pyridin-2-yl)quinazolin-4(3H)-one;

4-((2-(5,7-Dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)pyridin-3-yl)amino)-N,N-dimethylpiperidine-1-carboxamide;

2-(3-((3-(Isopropylamino)propyl)amino)pyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one;

5,7-Dimethoxy-2-(3-((1-methylpiperidin-4-yl)amino)pyridine-2-yl)quinazolin-4(3H)-one;

cis-4-((2-(5,7-Dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)-5-methoxypyridin-3-yl)amino)-N-isopropylcyclohexane-1-carboxamide;

5,7-Dimethoxy-2-(3-((1-(2,2,2-trifluoroacetyl)piperidin-4-yl)amino)pyridin-2-yl)quinazolin-4(3H)-one;

4-((2-(5,7-Dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)pyridin-3-yl)amino)-N-isopropylpiperidine-1-carboxamide;

5,7-Dimethoxy-2-(3-((1-pivaloylpiperidin-4-yl)amino)pyridin-2-yl)quinazolin-4(3H)-one;

5,7-Dimethoxy-2-(3-((2-morpholinoethyl)amino)pyridine-2-yl)quinazolin-4(3H)-one;

2-(3-((1-Isopropylpiperidin-4-yl)amino)-5-(2-((1-isopropylpiperidin-4-yl)amino)ethoxy)pyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(4-((2-(5,7-Dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)pyridin-3-yl)amino)piperidin-1-yl)-N,N-dimethyl-2-oxoacetamide;

4-((2-(5,7-dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)pyridin-3-yl)amino)-N-ethylpiperidine-1-carboxamide;

cis-4-((2-(5,7-Dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)pyridin-3-yl)amino)-N,N-dimethylcyclohexane-1-carboxamide;

4-((2-(5,7-Dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)pyridin-3-yl)amino)piperidine-1-carboxamide;

Methyl-2-(4-((2-(5,7-dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)pyridin-3-yl)amino)piperidin-1-yl)-2-oxoacetate;

N-(2-((2-(5,7-Dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)pyridin-3-yl)amino)ethyl)isobutyramide;

N-(3-((2-(5,7-Dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)pyridin-3-yl)amino)propyl)isobutyramide;

2-(3-((1-Isopropylpiperidin-4-yl)amino)pyridin-2-yl)-5-methoxypyrido[3,4-d]pyrimidin-4(3H)-one;

2-(3-((1-(2-Hydroxy-2-methylpropyl)piperidin-4-yl)amino)pyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(3-((1-(2-hydroxypropanoyl)piperidin-4-yl)amino)pyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one;

2-(3-((1-Isopropylpiperidin-4-yl)amino)pyridin-2-yl)-5-methoxy-7-((4-methoxybenzyl)amino)quinazolin-4(3H)-one;

2-[5-(2-Hydroxyethoxy)-3-(1-isopropylpiperidin-4-ylamino)pyridin-2-yl]-5,7-dimethoxyquinazolin-4(3H)-one;

cis-4-((2-(5,7-Dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)pyridin-3-yl)amino)-N-isopropylcyclohexane-1-carboxamide;

2-[5-(2-Hydroxyethoxy)-3-(1-isobutyroylpiperidin-4-ylamino)pyridin-2-yl]-5,7-dimethoxyquinazolin-4(3H)-one;

7-amino-2-(3-((1-Isopropylpiperidin-4-yl)amino)pyridin-2-yl)-5-methoxyquinazolin-4(3H)-one;

2-{3-(1-Isopropylpiperidin-4-ylamino)-5-[2-(pyrrolidin-1-yl)ethoxy]pyridin-2-yl}-5,7-dimethoxyquinazolin-4(3H)-one;

2-{5-[2-(Isopropylamino)ethoxy]-3-(1-isopropylpiperidin-4-ylamino)pyridin-2-yl}-5,7-dimethoxyquinazolin-4(3H)-one;

2-(3-((1-(1-Hydroxy-2-methylpropan-2-yl)piperidin-4-yl)amino)pyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one; and

7-(Ethylamino)-2-(3-((1-isopropylpiperidin-4-yl)amino)pyridin-2-yl)-5-methoxyquinazolin-4(3H)-one; and

stereoisomers, tautomers, and pharmaceutically acceptable salts thereof;

wherein said mammal is afflicted with a cancer selected from B-acute lymphocytic leukemia, Burkitt's lymphoma, diffuse large cell lymphoma, multiple myeloma, primary plasma cell leukemia, atypical carcinoid lung cancer, bladder cancer, breast cancer, cervix cancer, colon cancer, gastric cancer, glioblastoma, hepatocellular carcinoma, large cell neuroendocrine carcinoma, medulloblastoma, melanoma, neuroblastoma, esophageal cancer, osteosarcoma, ovarian cancer, prostate cancer, renal carcinoma, retinoblastoma, rhabdomyosarcoma, small cell lung carcinoma, NUT midline carcinoma, B-cell lymphoma, non-small cell lung cancer, head and neck squamous cell carcinoma, chronic lymphocytic leukemia, follicular lymphoma, diffuse large B cell lymphoma with germinal center phenotype, Hodgkin's lymphoma, activated anaplastic large cell lymphoma, primary neuroectodermal tumor, pancreatic cancer, adenoid cystic carcinoma, T-cell prolymphocytic leukemia, malignant glioma, thyroid cancer, Barrett's adenocarcinoma, hepatoma, pro-myelocytic leukemia, and mantle cell lymphoma.

21. The method of claim 20 , wherein the cancer:

(a) exhibits overexpression, translocation, amplification, or rearrangement of a myc family oncoprotein;

(b) results from aberrant regulation of BET proteins;

(c) relies on pTEFb (Cdk9/cyclin T) and BET proteins to regulate oncogenes;

(d) is associated with upregulation of BET responsive genes CDK6, Bcl2, TYRO3, MYB and/or hTERT; and/or

(e) is associated with a viral infection.

22. The method of claim 21 , wherein:

(a) the cancer exhibiting overexpression, translocation, amplification, or rearrangement of a myc family oncoprotein is selected from B-acute lymphocytic leukemia, Burkitt's lymphoma, diffuse large cell lymphoma, multiple myeloma, primary plasma cell leukemia, atypical carcinoid lung cancer, bladder cancer, breast cancer, cervix cancer, colon cancer, gastric cancer, glioblastoma, hepatocellular carcinoma, large cell neuroendocrine carcinoma, medulloblastoma, Nodular melanoma, Superficial spreading melanoma, neuroblastoma, esophageal squamous cell carcinoma, osteosarcoma, ovarian cancer, prostate cancer, renal clear cell carcinoma, retinoblastoma, rhabdomyosarcoma, and small cell lung carcinoma;

(b) the cancer resulting from aberrant regulation of BET proteins is selected from NUT midline carcinoma, B-cell lymphoma, non-small cell lung cancer, esophageal cancer, head and neck squamous cell carcinoma, and colon cancer;

(c) the cancer relying on pTEFb (Cdk9/cyclin T) and BET proteins to regulate oncogenes is selected from chronic lymphocytic leukemia, multiple myeloma, follicular lymphoma, diffuse large B cell lymphoma with germinal center phenotype, Burkitt's lymphoma, Hodgkin's lymphoma, anaplastic large cell lymphoma, neuroblastoma, primary neuroectodermal tumor, rhabdomyosarcoma, prostate cancer, and breast cancer;

(d) the cancer associated with upregulation of BET responsive genes CDK6, Bcl2, TYRO3, MYB, and hTERT is selected from pancreatic cancer, breast cancer, colon cancer, glioblastoma, adenoid cystic carcinoma, T-cell prolymphocytic leukemia, malignant glioma, bladder cancer, medulloblastoma, thyroid cancer, melanoma, multiple myeloma, Barrett's adenocarcinoma, hepatoma, prostate cancer, pro-myelocytic leukemia, chronic lymphocytic leukemia, mantle cell lymphoma, diffuse large B-cell lymphoma, small cell lung cancer, and renal carcinoma; and/or

(e) the viral infection is selected from Epstein-Barr Virus, hepatitis B virus, hepatitis C virus, Kaposi's sarcoma associated virus, human papilloma virus, Merkel cell polyomavirus, and human cytomegalovirus.

23. The method of claim 20 , wherein the compound of Formula I is administered in combination with another anticancer agent.

24. The method of claim 23 , wherein the anticancer agent is selected from ABT-737, Azacitidine (Vidaza), AZD1152 (Barasertib), AZD2281 (Olaparib), AZD6244 (Selumetinib), BEZ235, Bleomycin Sulfate, Bortezomib (Velcade), Busulfan (Myleran), Camptothecin, Cisplatin, Cyclophosphamide (Clafen), CYT387, Cytarabine (Ara-C), Dacarbazine, DAPT (GSI-IX), Decitabine, Dexamethasone, Doxorubicin (Adriamycin), Etoposide, Everolimus (RAD001), Flavopiridol (Alvocidib), Ganetespib (STA-9090), Gefitinib (Iressa), Idarubicin, Ifosfamide (Mitoxana), IFNa2a (Roferon A), Melphalan (Alkeran), Methazolastone (temozolomide), Metformin, Mitoxantrone (Novantrone), Paclitaxel, Phenformin, PKC412 (Midostaurin), PLX4032 (Vemurafenib), Pomalidomide (CC-4047), Prednisone (Deltasone), Rapamycin, Revlimid (Lenalidomide), Ruxolitinib (INCB018424), Sorafenib (Nexavar), SU11248 (Sunitinib), SU11274, Vinblastine, Vincristine (Oncovin), Vinorelbine (Navelbine), Vorinostat (SAHA), and WP1130 (Degrasyn).