Heterocyclic compounds and uses thereof

1. A method for treating myelofibrosis comprising administering to a subject in need thereof an effective amount of a compound of Formula (I):

or a pharmaceutically acceptable salt, a tautomer, a stereoisomer or a deuterated analog thereof, wherein:

R 1 is cyano, halo, or (C 1 -C 3 )alkyl optionally substituted with 1 to 3 substituents independently selected from the group consisting of halo, methyl, ethyl, methoxy and ethoxy; and

X, when present, is halo.

2. The method of claim 1 , wherein R 1 is (C 1 -C 2 )alkyl, cyano or fluoro.

3. The method of claim 2 , wherein R 1 is methyl.

4. The method of claim 2 , wherein R 1 is fluoro.

5. The method of claim 2 , wherein R 1 is cyano.

6. The method of claim 1 , wherein the compound of Formula (I) is a compound of Formula (II):

or a pharmaceutically acceptable salt, a tautomer, a stereoisomer, or a deuterated analog thereof, wherein:

R 1 is (C 1 -C 3 )alkyl optionally substituted with 1 to 3 substituents independently selected from the group consisting of halo, methyl, ethyl, methoxy and ethoxy.

7. The method of claim 6 , wherein R 1 is methyl.

8. The method of claim 1 , wherein the compound of Formula (I) is a compound of formula:

or a pharmaceutically acceptable salt, a tautomer, or a deuterated analog thereof.

9. The method of claim 1 , further comprising administering one or more additional therapeutic agents.

10. The method of claim 9 , wherein the one or more additional therapeutic agents is one or more of i) an alkylating agent selected from adozelesin, altretamine, bizelesin, busulfan, carboplatin, carboquone, carmustine, chlorambucil, cisplatin, cyclophosphamide, dacarbazine, estramustine, fotemustine, hepsulfam, ifosfamide, improsulfan, irofulven, lomustine, mechlorethamine, melphalan, oxaliplatin, piposulfan, semustine, streptozocin, temozolomide, thiotepa, and treosulfan; ii) an antibiotic selected from bleomycin, dactinomycin, daunorubicin, doxorubicin, epirubicin, idarubicin, menogaril, mitomycin, mitoxantrone, neocarzinostatin, pentostatin, and plicamycin; iii) an antimetabolite selected from the group consisting of azacitidine, capecitabine, cladribine, clofarabine, cytarabine, decitabine, floxuridine, fludarabine, 5-fluorouracil, ftorafur, gemcitabine, hydroxyurea, mercaptopurine, methotrexate, nelarabine, pemetrexed, raltitrexed, thioguanine, and trimetrexate; iv) an antibody therapy agent selected from alemtuzumab, bevacizumab, cetuximab, galiximab, gemtuzumab, nivolumab, panitumumab, pembrolizumab, pertuzumab, rituximab, tositumomab, trastuzumab, and 90 Y ibritumomab tiuxetan; v) a hormone or hormone antagonist selected from the group consisting of anastrozole, androgens, buserelin, diethylstilbestrol, exemestane, flutamide, fulvestrant, goserelin, idoxifene, letrozole, leuprolide, magestrol, raloxifene, tamoxifen, and toremifene; vi) a taxane selected from DJ-927, docetaxel, TPI 287, paclitaxel and DHA-paclitaxel; vii) a retinoid selected from alitretinoin, bexarotene, fenretinide, isotretinoin, and tretinoin; viii) an alkaloid selected from etoposide, homoharringtonine, teniposide, vinblastine, vincristine, vindesine, and vinorelbine; ix) an antiangiogenic agent selected from AE-941 (GW786034, Neovastat), ABT-510, 2-methoxyestradiol, lenalidomide, and thalidomide; x) a topoisomerase inhibitor selected from amsacrine, edotecarin, exatecan, irinotecan, SN-38 (7-ethyl-10-hydroxy-camptothecin), rubitecan, topotecan, and 9-aminocamptothecin; xi) a kinase inhibitor; xii) a targeted signal transduction inhibitor selected from bortezomib, geldanamycin, and rapamycin; xiii) a biological response modifier selected from imiquimod, interferon-a and interleukin-2; xiv) an IDO inhibitor; xv) a chemotherapeutic agent selected from 3-AP (3-amino-2-carboxyaldehyde thiosemicarbazone), altrasentan, aminoglutethimide, anagrelide, asparaginase, bryostatin-1, cilengitide, elesclomol, eribulin mesylate (E7389), ixabepilone, lonidamine, masoprocol, mitoguanazone, oblimersen, sulindac, testolactone, tiazofurin, a mTOR inhibitor, a PI3K inhibitor, a Cdk4 inhibitor, an Akt inhibitor, a Hsp90 inhibitor, a farnesyltransferase inhibitor, and an aromatase inhibitor (anastrozole letrozole exemestane); xvi) a MEK inhibitor; xvii) a tyrosine kinase inhibitor; xviii) a c-Kit mutant inhibitor, xix) an EGFR inhibitor; or xx) an epigenetic modulator.

11. The method of claim 10 , wherein the one or more additional therapeutic agents is an epigenetic modulator selected from the group consisting of:

(a) a DNA methyltransferase;

(b) a histone or protein methyltransferase;

(c) a histone demethylase;

(d) a histone deacetylase inhibitor;

(e) histone acetyltransferase; and

(f) a chromatin remodeler.

12. The method of claim 10 , wherein the epigenetic modulator is a histone deacetylase inhibitor selected from the group consisting of: vorinostat, romidepsin, chidamide, panobinostat, belinostat, valproic acid, mocetinostat, abexinostat, entinostat, resminostat, givinostat, and quisinostat.

13. The method of claim 9 , wherein the one or more additional therapeutic agents is a kinase inhibitor.

14. The method of claim 8 , further comprising administering one or more additional therapeutic agents.

15. The method of claim 14 , wherein the one or more additional therapeutic agents is a kinase inhibitor.

16. A method for treating myelofibrosis comprising administering to a subject in need thereof an effective amount of a compound of formula:

or a pharmaceutically acceptable salt thereof, in combination with a kinase inhibitor.