CROSS REFERENCE TO RELATED APPLICATIONS

This Application is a National Stage filing under 35 U.S.C. 371 of International Patent Application No. PCT/CN2018/104531, filed Sep. 7, 2018, which claims priority to China Application Number 201710801364.3, filed Sep. 7, 2017. The entire contents of these applications are incorporated herein by reference in their entirety.

FIELD OF THE INVENTION

The present invention relates to cycloolefin substituted heteroaromatic compounds and their use in the treatment of diseases induced by IDH mutations.

BACKGROUND OF THE INVENTION

The survival way of tumor cells is different from that of normal cells, so does the energy intake and utilization. The common metabolic pathway in aerobic organisms is tricarboxylic acid cycle, in which isocitrate dehydrogenase (IDH) catalyzing the conversion of isocitrate to α-ketoglutaric acid (α-KG) is a rate-limiting step. The known IDH family comprises three isozymes, IDH1, IDH2 and IDH3, which are located in different organelles and perform the same biological functions, i.e., catalyzing the formation of α-KG. Recent studies have shown that heterozygous IDH1/2 mutations were present in a certain proportion of a variety of tumors, such as glioma (60-80%), chondrosarcoma (55%), acute myeloid leukemia (15-25%), etc. The mutant IDH1 or IDH2 loses the capability of catalyzing the conversion of isocitrate to α-KG, whereas has the ability of catalyzing the reaction of α-KG to α-hydroxyglutaric acid (2-HG). As the structure of 2-HG is similar to the structure of α-KG, 2-HG can competitively inhibit the activity of many α-KG dependent enzymes (for example: histone demethylase and methylcytosine hydroxylase of the TET family, and the like) when it accumulates to a certain extent, and thus effects the demethylation of histones and DNA, interferes with normal cell differentiation, and results in the proliferation of immature cells.

Agios Pharmaceuticals published its research results in Science magazine in 2013: the mutant IDH1 enzyme inhibitor AGI-5198 (Science, 2013, 340, 626-630) and the mutant IDH2 enzyme inhibitor AGI-6780 (Science, 2013, 340, 622-626) developed by the company can effectively inhibit the generation of 2HG mediated by mutant IDH1/IDH2 in cells and can induce differentiation of abnormally proliferating cancer cells. Both the treatment of glioma cells harboring mutant IDH1 gene with AGI-5198 and the treatment of leukemia cells carrying mutant IDH2 gene with AG-6780 lead to increase of the expression of mature markers in cells.

The Phase I clinical trial of AG-120, a mutant IDH1 inhibitor developed by Agios Pharmaceuticals, showed that in patients with acute myeloid leukemia (AML) or myelodysplastic syndrome (MDS) having IDH1 mutations, it can be observed that 98% of the patients have decreased levels of α-hydroxyglutaric acid (2HG).

Acute myeloid leukemia (AML) is one of the most difficult diseases to be controlled in common hematological malignancies. Its recurrence rate is high. The development of new drug for the disease is slow resulting in the lack of effective drug therapy. Some studies have shown that about 15% of the patients with acute myeloid leukemia have IDH2 gene mutations. Enasidenib (former name AG-221), a mutant IDH2 inhibitor, developed by Agios Pharmaceuticals and Celgene, showed a significant effect on relapsed and refractory acute myelogenous leukemias with IDH2 gene mutations in clinical trial.

New IDH mutant inhibitors are needed to be developed to meet the need for treatment of patients with hematological tumors, especially acute myeloid leukemia, gliomas and other IDH mutation associated tumors. The present invention addresses these needs.

SUMMARY OF THE INVENTION

The present invention provides a compound of formula (I):


and/or a pharmaceutically acceptable salt thereof, and/or solvates, racemic mixtures, enantiomers, diasteromers, and tautomers thereof, wherein A, R1, R2, R3, R3′, R4, R4′, R5, R6, R7, R8, m, and n are as defined in the detailed description of the invention.

Also provided is a pharmaceutical composition, comprising at least one compound of formula (I) (e.g., any of the compounds described herein) and/or a pharmaceutically acceptable salt thereof, and optionally comprising at least one pharmaceutically acceptable excipient (e.g., a pharmaceutically acceptable carrier).

Also provided is a method of treating a disease induced by IDH mutation, comprising administering to the subject in need thereof an effective amount of at least one compound of formula (I) (e.g., any of the compounds described herein) and/or at least one pharmaceutically acceptable salt thereof.

Also provided is a use of at least one compound of formula (I) (e.g., any of the compounds described herein) and/or at least one pharmaceutically acceptable salt thereof for treating a disease induced by IDH mutation.

Also provided is a use of at least one compound of formula (I) (e.g., any of the compounds described herein) and/or at least one pharmaceutically acceptable salt thereof in the manufacture of a medicament for treating a disease induced by IDH mutation.

