INDAZOLE COMPOUNDS AND THEIR PHARMACEUTICAL COMPOSITIONS

Abstract

The present invention provides indazole derivatives or their pharmaceutically acceptable salts or stereoisomers having the structure shown in formula (I), and their pharmaceutical compositions and applications thereof. Such compounds can be used as protein kinase inhibitors, which can effectively inhibit the activity of tropomyosin receptor kinase (TRK) protein kinase and can inhibit the proliferation, migration and invasion of a variety of tumor cells.

Description

BACKGROUND

Technical Field

The present disclosure relates to the technical field of chemical medicine, in particular to indazole compounds and their pharmaceutical composition and applications thereof.

Description of Related Art

Tropomyosin receptor kinase (TRK), which belongs to the receptor tyrosine kinase (RTK) family, has three subtypes TRKA, TRKB, and TRKC, which are encoded by NTRK1, NTRK2, and NTRK3 genes respectively. TRK is a class of transmembrane proteins consisting of an extracellular ligand-binding region, a transmembrane domain (TM) and an intracellular region, and activates mainly by binding neurotrophic factors (NTs). Neurotrophic factors are a class of protein molecules produced by nerve-innervated tissues (e.g., muscles) and astrocytes that are essential for neuronal growth and survival. At present, four major neurotrophic factors have been discovered, namely NGFs (nerve growth factors), brain-derived neurotrophic factors (BDNFs), neurotrophic factors 3 (NT-3) and neurotrophic factors 4 (NT-4), wherein NGF binds to TRKA, BDNF and NT-4 bind to TRKB, and NT-3 can bind to all three TRK proteins, but it binds more strongly to TRKC. When activated by signal induction, TRK activates downstream signaling pathways sequentially through self-dimerization and phosphorylation to achieve various cellular physiological functions. The downstream signaling pathways of TRK include MAPK, PI3K/AKT, and PLCγ/PKC pathways. These signaling pathways regulate cell proliferation, differentiation, migration, apoptosis and other physiological processes, as well as a variety of neuron-related physiological activities, such as neurosynaptic flexibility, neural dendrite growth and repair, prevention and repair of neuronal degradation and maintenance of sensory neurons.

Numerous studies have shown that TRK overexpression, gene fusions, and mononucleotide alterations are closely related to the occurrence and development of various types of tumors, such as non-small cell lung cancer, breast cancer, colon cancer, prostate cancer, thyroid cancer, malignant melanoma, neuroblastoma, and mammary analog secretory carcinoma. Among mechanisms of abnormal TRK activation, the most prevalent mechanism is the gene fusion of TRK. The earliest NTRK fusion gene discovered in medical research was the TPM3-NTRK1 fusion gene found in colon cancer samples. With the deepening of research, researchers successively discovered multiple types of fusion genes, such as CD74-NTRK1, ETV6-NTRK2, QKI-NTRK2, and ETV6-NTRK3. The TRK fusion proteins expressed by NTRK fusion genes can continuously activate downstream signaling pathways independent of binding to ligands, thereby inducing abnormal cell proliferation and promoting the occurrence and development of tumors. Therefore, TRK is considered to be an effective target for anticancer therapy.

At present, a selective TRK inhibitor, Larotrectinib, developed by LOXO Inc. in USA was approved by the FDA in 2018; and a TRK inhibitor, Entrectinib, developed by Roche Pharmaceuticals Inc. was launched in Japan in June 2019. Belizatinib developed by TESARO Inc. is undergoing clinical study. In addition, multi-target inhibitors such as Cabozanitinib, Sitravatinib and Altiratinib also have good TRK inhibitory activity.

The NTRK gene point mutation caused by continuous use of TRK inhibitors is the key factor of drug resistance in tumors. Clinical studies have successively discovered mutations on G595R, G667C, F589L, and G667S in NTRK1, and on G623R and G696A in NTRK3. There is currently no inhibitor targeting these mutations on the market, and the second-generation TRK inhibitors, LOXO-195, TPX-0005, and ONO-5390556 are under clinical investigation.

Summary

In view of the above problems, the present disclosure provides an indazole derivative or its pharmaceutically acceptable salt or its stereoisomer, and such compounds can be used as protein kinase inhibitors, which can effectively inhibit the activity of TRK protein kinase and inhibit the proliferation, migration and invasion of a variety of tumor cells.

The specific technical solutions are as follows:

indazole derivatives or their pharmaceutically acceptable salts or their stereoisomers, having the structure shown in formula (I):

wherein,

0-2 of A₁, A₂, and A₃ are selected from N, and the rest are CH;

X₁ is selected from: —(CR₁R₂)₆—, —O—, —S—, —S(O)—, —S(O₂)—, —C(O)—, —N(R₃)—, —CH═CH—, —C≡C—, —C(O)N(R₃)—, or none;

X₂ is selected from: —(CR₁R₂)₆—, —O—, —S—, —S(O)—, —S(O₂)—, —C(O)—, —N(R₃)—, —CH═CH—, —C≡C—, —C(O)N(R₃)—, or none;

alternatively, X₁ and X₂ together form one or more R₁ substituted or unsubstituted C₃-C₈ cycloalkyl, or one or more R₁ substituted or unsubstituted 3-8 membered heterocyclyl;

B₁ is selected from: one or more R₄ substituted or unsubstituted C₆-C₁₀ aryl, one or more R₄ substituted or unsubstituted 5-10 membered heteroaryl;

L is selected from: —CH═CH—, —C≡C—;

B₂ is selected from: one or more R₅ substituted or unsubstituted C₆-C₁₀ aryl, one or more R₅ substituted or unsubstituted 5-10 membered heteroaryl, —C(O)N(R₆R₇);

R₁ and R₂ are each independently selected from: hydrogen, C₁-C₆ alkyl, cyano, halogen, halogenated C₁-C₆ alkyl, hydroxyl, amino, mercapto, C₁-C₆ alkoxy, C₁-C₆ alkylamino, C₁-C₆ alkylthio, C₁-C₆alkoxy C₁-C₆ alkyl; when either X₁ or X₂ is selected from —O— and —S— and the other is selected from —(CR₁R₂)_n—, both R₁ and R₂ are hydrogen;

each R₃ is independently selected from: hydrogen and C₁-C₆ alkyl;

each R₄ is independently selected from: hydrogen, C₁-C₆ alkyl, cyano, halogen, halogenated C₁-C₆ alkyl, hydroxyl, nitro, amino, mercapto, C₁-C₆ alkoxy, halogenated C₁-C₆ alkoxy, C₁-C₆ alkylamino, C₁-C₆ alkylamido, C₁-C₆ alkylthio, C₁-C₆ alkoxy C₁-C₆ alkyl, C₁-C₆ alkylsulfonyl, C₁-C₆ alkylsulfonamido;

each R₅ is independently selected from: hydrogen, C₁-C₆ alkyl, cyano, halogen, halogenated C₁-C₆ alkyl, hydroxyl, amino, mercapto, C₁-C₆ alkoxy, C₁-C₆ alkylamino, C₁-C₆ alkylthio, C₁-C₆ alkoxy C₁-C₆ alkyl, hydroxyl-substituted C₁-C₆ alkyl, cyano-substituted C₁-C₆ alkyl, —C(O)—C(R₃)₃, cyclopropyl, N(R₃)₂C(O)—(C(R₃)₂)_n—;

R₆ and R₇ are each independently selected from: hydrogen and C₁-C₁₀ alkyl, or R₆ and R₇ together with a nitrogen atom which they are attached to, form one or more R₈ substituted or unsubstituted 3-8 membered heterocyclyl;

each R₈ is independently selected from: hydrogen, C₁-C₆ alkyl, cyano, halogen, halogenated C₁-C₆ alkyl, hydroxyl, amino, mercapto, C₁-C₆ alkoxy, C₁-C₆ alkylamino, C₁-C₆ alkylthio, C₁-C₆ alkoxy C₁-C₆ alkyl, hydroxyl-substituted C₁-C₆ alkyl, cyano-substituted C₁-C₆ alkyl, —C(O)—C(R₃)₃, cyclopropyl, N(R₃)₂C(O)—(C(R₃)₂)_n—; and

n is selected from: an integer between 1-8.

In some of the embodiments, both A₁ and A₂ are CH, and A₃ is N or CH.

In some of the embodiments, A₁ is N or CH, and both A₂ and A₃ are CH.

In some of the embodiments, X₁-X₂ formed by X₁ and X₂ together is selected from: —(CR₁R₂)_n—, —O—, —S—, —S(O)—, —S(O₂)—, —C(O)—, —N(C₁-C₆ alkyl)-, —(CH₂)_n—O—, —O—(CH₂)_n—, —(CR₁R₂)_n—N(R₃)—, —N(R₃)—(CR₁R₂)_n—, —(CH₂)_n—S—, —S—(CH₂)_n—, —S(O₂)N(R₃)—, —N(R₃)S(O₂)—, —N(R₃)C(O)N(R₃)—, one or more R₁ substituted or unsubstituted C₃-C₈ cycloalkyl, and one or more R₁ substituted or unsubstituted 3-8 membered heterocycloalkyl;

R₁ and R₂ are each independently selected from: hydrogen, C₁-C₆ alkyl;

each R₃ is independently selected from: H, C₁-C₆ alkyl;

n is selected from: an integer between 1-4.

In some of the embodiments, X₁-X₂ formed by X₁ and X₂ together is selected from: —(CR₁R₂)_n—, —O—, —S—, —S(O₂)—, —N(C₁-C₃ alkyl)-, —(CH₂)_n—O—, —O—(CH₂)_n—, —(CR₁R₂)_n—N(R₃)—, —NR₃—(CR₁R₂)_n—, —S(O₂)N(R₃)—, —N(R₃)S(O₂), and 5-6 membered heterocycloalkyl;

R₁ and R₂ are each independently selected from: hydrogen, C₁-C₃ alkyl;

each R₃ is independently selected from: H, C₁-C₃ alkyl;

n is selected from: an integer between 1-2.

In some of the embodiments, X₁-X₂ formed by X₁ and X₂ together is selected from: —CH₂—, —O—, —S—, —S(O₂)—, —OCH₂—, —N(CH₃)—, —CH₂O—, —CH₂NH—, —CH₂N(CH₃)—, —NH—S(O₂)—, —S(O₂)—NH—, —NHCH₂—, —NHCH(CH₃)—, —CH(CH₃)NH—, —N(CH₃)CH₂—, —CH₂CH₂—,

In some of the embodiments, X₁-X₂ formed by X₁ and X₂ together is selected from: —S(O₂)—, —CH₂CH₂—; or X₁ is —O— and X₂ is CH₂—.

In some of the embodiments, X₁ is —NH— and X₂ is selected from: —S(O₂)—, —CH₂—, —CH(CH₃)—.

In some of the embodiments, the indazole derivative has the structure shown in formula (II) or formula (III).

In some of the embodiments, B₁ is selected from: one or more R₄ substituted or unsubstituted phenyl, one or more R₄ substituted or unsubstituted pyridinyl, one or more R₄ substituted or unsubstituted pyrimidinyl, one or more R₄ substituted or unsubstituted naphthyl, one or more R₄ substituted or unsubstituted quinolinyl, one or more R₄ substituted or unsubstituted pyrazolyl, one or more R₄ substituted or unsubstituted pyrrolyl, one or more R₄ substituted or unsubstituted thienyl, one or more R₄ substituted or unsubstituted furanyl, one or more R₄ substituted or unsubstituted pyrazinyl.

In some of the embodiments, each R₄ is independently selected from: hydrogen, C₁-C₃ alkyl, halogen, halogenated C₁-C₃ alkyl, cyano, C₁-C₃ alkoxy, C₁-C₄ alkyl sulfonyl, C₁-C₃ alkylsulfonamido.

In some of the embodiments, each R₄ is independently selected from: hydrogen, halogen, nitro, amino, hydroxyl, mercapto, trifluoromethyl, cyano, formamido, methylamino, trifluoromethoxy, difluoromethoxy, difluoromethyl, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, neopentyl, methoxy, ethoxy, isopropoxy, tert-butoxy, methoxyethyl, ethoxyethyl, methylthio, ethylthio, isopropylthio, tert-butylthio, methylsulfonyl, ethylsulfonyl, isopropylsulfonyl, tert-butyl sulfonyl, methylsulfonamido.

In some of the embodiments, B₁ is selected from:

In some of the embodiments, B₁ is selected from:

In some of the embodiments, B₂ is selected from: one or more R₅ substituted or unsubstituted phenyl, one or more R₅ substituted or unsubstituted naphthyl, one or more R₅ substituted or unsubstituted quinolinyl, one or more R₅ substituted or unsubstituted pyrazolyl, one or more R₅ substituted or unsubstituted pyrrolyl, one or more R₅ substituted or unsubstituted thienyl, one or more R₅ substituted or unsubstituted furanyl, one or more R₅ substituted or unsubstituted pyridyl, one or more R₅ substituted or unsubstituted pyrimidinyl, one or more R₅ substituted or unsubstituted pyrazinyl, one or more R₅ substituted or unsubstituted triazolyl, —C(O)NR₆R₇.

In some of the embodiments, B₂ is selected from:

In some of the embodiments, B₂ is selected from:

In some of the embodiments, each R₅ is independently selected from: hydrogen, C₁-C₃ alkyl, halogen, halogenated C₁-C₃ alkyl, cyano, C₁-C₃ alkoxy, hydroxyl-substituted C₁-C₃ alkyl, cyano-substituted C₁-C₃ alkyl, C₁-C₃ alkoxy C₁-C₃ alkyl, —C(O)—C(R₃)₃, cyclopropyl, N(R₃)₂C(O)—(C(R₃)₂)_n—, wherein each R₃ is independently selected from: H, C₁-C₃ alkyl.

In some of the embodiments, each R₅ is independently selected from: hydrogen, hydroxyl-substituted C₁-C₃ alkyl, C₁-C₃ alkyl, cyano-substituted C₁-C₃ alkyl, cyclopropyl, C₁-C₃ alkoxy C₁-C₃ alkyl.

In some of the embodiments, each R₅ is independently selected from: hydrogen, hydroxyl, amino, mercapto, halogen, trifluoromethyl, cyano, trifluoromethoxy, difluoromethoxy, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, neopentyl, methoxy, ethoxy, isopropoxy, tert-butoxy, methylthio, ethylthio, isopropylthio, tert-butylthio, methoxyethyl, ethoxyethyl, hydroxylmethyl, hydroxylethyl, hydroxylpropyl, cyano-substituted methyl, cyano-substituted ethyl, acetyl, 2,2,2-trifluoroethyl, cyclopropyl, 2,2-difluoroethyl, N,N-dimethylacetamido, difluoromethyl, isopropoxy-substituted ethyl, N-methylacetamido.

In some of the embodiments, R₆ and R₇ are each independently selected from: hydrogen, and C₁-C₆ alkyl, or R₆ and R₇ together with a nitrogen atom, which they are attached to, form one or more R₈ substituted or unsubstituted 4-8 membered heterocyclyl.

In some of the embodiments, R₆ and R₇ are each independently selected from: hydrogen and C₁-C₃ alkyl, or R₆ and R₇ together with a nitrogen atom, which they are attached to, form heterocyclyl with following structure:

wherein each R₈ is independently selected from: hydrogen, hydroxyl, C₁-C₃ alkyl, halogen, halogenated C₁-C₃ alkyl, C₁-C₃ alkoxy.

In some of the embodiments, R₆ and R₇ are each independently selected from: hydrogen and methyl, or R₆ and R₇ with a nitrogen atom, which they are attached to, form heterocyclyl with following structure:

In some of the embodiments, the indazole derivative has the structure shown in formula (II).

wherein A₁ is selected from: CH, N;

R₁ is selected from: H and methyl;

B₁ is selected from:

B₂ is selected from:

R₅ is selected from: hydrogen, methyl, ethyl, hydroxylethyl;

R₆ and R₇ are each independently selected from: hydrogen and methyl, or R₆ and R₇ with a nitrogen atom, which they are attached to, form heterocyclyl with following structure:

In some of the embodiments, the indazole derivative has the structure shown in formula (III).

B₁ is selected from:

B₂ is selected from:

R₅ is selected from: hydrogen, cyano-substituted methyl, acetyl, 2,2,2-trifluoroethyl, cyclopropyl, 2,2-difluoroethyl, isopropyl, difluoromethyl, isopropoxyethyl, methoxyethyl, hydroxylethyl, methyl, ethyl.

The present disclosure also provides applications of the above indazole derivatives or their pharmaceutically acceptable salts or stereoisomers.

The specific technical solutions are as follows.

Provided is an application of the above indazole derivatives or their pharmaceutically acceptable salts or their stereoisomers in the preparation of tropomyosin receptor kinase (TRK) inhibitors.

Provided is an application of the above indazole derivatives or their pharmaceutically acceptable salts or stereoisomers in the manufacture of drug mediated by tropomyosin receptor kinase (TRK) tyrosine kinases for preventing or treating diseases.

In some of the embodiments, the diseases mediated by the TRK tyrosine kinases are tumors, preferably non-small cell lung cancer, breast cancer, colon cancer, prostate cancer, thyroid cancer, malignant melanoma, neuroblastoma, and mammary analog secretory carcinoma.

The present disclosure also provides pharmaceutical compositions for preventing or treating tumors.

The specific technical solutions are as follows.

Provided is pharmaceutical compositions for preventing or treating tumors. It's prepared from active ingredient and pharmaceutically acceptable excipient, wherein the active ingredient includes the said indazole derivatives or their pharmaceutically acceptable salt or their stereoisomers.

Based on the above technical solutions, the present disclosure has following beneficial effects.

After extensive and intensive research, the inventors of the present disclosure surprisingly developed a structurally novel indazole derivative. Such compounds have strong inhibitory activity against TRK tyrosine kinase. Thus, such compounds can be used as an effective inhibitor of TRK tyrosine kinase, and can be used to prevent or treat related diseases mediated by TRK tyrosine kinase, such as a variety of tumors (non-small cell lung cancer, breast cancer, colon cancer, prostate cancer, thyroid cancer, malignant melanoma, neuroblastoma and mammary analog secretory carcinoma).

DESCRIPTION OF THE EMBODIMENTS

In the compounds of the present disclosure, when any variable (e.g. R, etc.) occurs more than once in any component, its definition at each occurrence is independent of the definitions at each other occurrence. Similarly, combinations of substituents and variables are allowed as long as such combinations stabilize the compounds. A line drawn from a substituent into a ring system indicates that the bond referred to can be attached to any substitutable ring atom. If the ring system is polycyclic, it means that such bonds are attached only to any appropriate carbon atom adjacent to the ring. It is understood that a person of ordinary skill in the art may select the substituents and substitution patterns of the compounds of the present disclosure to provide compounds that are chemically stable and readily synthesized from readily available raw materials by the technology in the field and the methods set forth below. If the substituents themselves are substituted by more than one group, it is understood that these groups may be on the same carbon atom or on different carbon atoms, as long as the structure is stabilized.

As used herein, the phrases such as “Rf-substituted” and “R-substituted” are considered as equivalent to the phrases “substituted with at least one substituent”, and in this case the preferred embodiments will have 1-4 substituents.

As used herein, the term “alkyl” is intended to include branched and linear saturated aliphatic hydrocarbyl having a specific number of carbon atoms. For example, the definition of “C₁-C₆” in “C₁-C₆ alkyl” includes groups having 1, 2, 3, 4, 5 or 6 carbon atoms in a linear or branched chain arrangement. For example, “C₁-C₆ alkyl” specifically includes methyl, ethyl, n-propyl, isopropyl, n-butyl, tert-butyl, isobutyl, pentyl and hexyl. The term “cycloalkyl” refers to a monocyclic saturated aliphatic hydrocarbyl having a specific number of carbon atoms. For example, “cycloalkyl” includes cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl, etc. The term “alkoxy” refers to a group having an —O-alkyl structure, such as —OCH₃, —OCH₂CH₃, —OCH₂CH₂CH₃, —O—CH₂CH(CH₃)₂, —OCH₂CH₂CH₂CH₃, and —O—CH(CH₃)₂ and the like. The term “heterocyclyl” is a saturated or partially unsaturated monocyclic or polycyclic substituent, in which one or more ring atoms are selected from a heteroatom of N, O or S(O)m (wherein m is an integer from 0 to 2), and the remaining ring atoms are carbon, such as tetrahydropyrrolyl, etc. The term “heteroaryl” refers to an aromatic ring containing 1, 2 or 3 heteroatoms selected from O, N or S. Heteroaryl groups within the scope of the present disclosure include, but are not limited to: quinolinyl, pyrazolyl, pyrrolyl, thienyl, furanyl, pyridinyl, pyrimidinyl, pyrazinyl, triazolyl, imidazolyl, oxazolyl, isoxazolyl, and pyridazinyl. As understood by those skilled in the art, “halo” or “halogen” as used herein means chlorine, fluorine, bromine and iodine.

Provided are indazole derivatives or their pharmaceutically acceptable salts or stereoisomer having the structure shown in formula (I):

wherein,

0-2 of A₁-A₃ are selected from N and the rest are CH;

X₁ is selected from: —(CR₁R₂)_n—, —O—, —S—, —S(O)—, —S(O₂)—, —C(O)—, —N(R₃)—, —CH═CH—, —C≡C—, —C(O)N(R₃)—, or none;

X₂ is selected from: —(CR₁R₂)_n—, —O—, —S—, —S(O)—, —S(O₂)—, —C(O)—, —N(R₃)—, —CH═CH—, —C≡C—, —C(O)N(R₃)—, or none;

alternatively, X₁ and X₂ together form one or more R₁ substituted or unsubstituted C₃-C₈ cycloalkyl, or one or more R₁ substituted or unsubstituted 3-8 membered heterocyclyl;

B₁ is selected from: one or more R₄ substituted or unsubstituted C₆-C₁₀ aryl, one or more R₄ substituted or unsubstituted 5-10 membered heteroaryl;

L is selected from: —CH═CH—, —C≡C—;

B₂ is selected from: one or more R₅ substituted or unsubstituted C₆-C₁₀ aryl, one or more R₅ substituted or unsubstituted 5-10 membered heteroaryl, —C(O)N(R₆R₇);

R₁ and R₂ are each independently selected from: hydrogen, C₁-C₆ alkyl, cyano, halogen, halogenated C₁-C₆ alkyl, hydroxyl, amino, mercapto, C₁-C₆ alkoxy, C₁-C₆ alkylamino, C₁-C₆ alkylthio, C₁-C₆ alkoxy, C₁-C₆ alkyl; when one of X₁ and X₂ is selected from —O—, —S—, and the other is selected from —(CR₁R₂)_n—, both R₁ and R₂ are hydrogen;

each R₃ is independently selected from: hydrogen C₁-C₆ alkyl.

each R₄ is independently selected from: hydrogen, C₁-C₆ alkyl, cyano, halogen, halogenated C₁-C₆ alkyl, hydroxyl, nitro, amino, mercapto, C₁-C₆ alkoxy, halogenated C₁-C₆ alkoxy, C₁-C₆ alkylamino, C₁-C₆ alkylamido, C₁-C₆ alkylthio, C₁-C₆ alkoxy C₁-C₆ alkyl, C₁-C₆ alkylsulfonyl, C₁-C₆alkylsulfonamidyl;

each R₅ is independently selected from: hydrogen, C₁-C₆ alkyl, cyano, halogen, halogenated C₁-C₆ alkyl, hydroxyl, amino, mercapto, C₁-C₆ alkoxy, C₁-C₆ alkylamino, C₁-C₆ alkylthio, C₁-C₆ alkoxy C₁-C₆ alkyl, hydroxyl-substituted C₁-C₆ alkyl, cyano-substituted C₁-C₆ alkyl, —C(O)—C(R₃)₃, cyclopropyl, N(R₃)₂C(O)—(C(R₃)₂)_n—;

R₆ and R₇ are each independently selected from: hydrogen, C₁-C₁₀ alkyl, or R₆ and R₇ together with a nitrogen atom connected thereto form one or more R₈ substituted or unsubstituted 3-8 membered heterocyclyl;

each R₈ is independently selected from: hydrogen, C₁-C₆ alkyl, cyano, halogen, halogenated C₁-C₆ alkyl, hydroxyl, amino, mercapto, C₁-C₆ alkoxy, C₁-C₆ alkylamino, C₁-C₆ alkylthio, C₁-C₆ alkoxy C₁-C₆ alkyl, hydroxyl-substituted C₁-C₆ alkyl, cyano-substituted C₁-C₆ alkyl, —C(O)—C(R₃)₃, cyclopropyl, N(R₃)₂C(O)—(C(R₃)₂)_n—.

The present disclosure includes free forms of compounds of formula (I), formula (II) and formula (III), as well as their pharmaceutically acceptable salts and stereoisomers. Some of the specific exemplary compounds herein are protonated salts of amine compounds. The term “free form” refers to the amine compound in a non-salt form. The included pharmaceutically acceptable salts include not only exemplary salts of the specific compounds described herein, but also typical pharmaceutically acceptable salts of the free forms of all compounds of formula (I), formula (II) and formula (III). The free forms of specific salts of the compounds can be isolated by using techniques known in the art. For example, the free forms can be regenerated by treating the salt with an appropriate dilute aqueous base solution such as dilute aqueous NaOH, dilute aqueous potassium carbonate, dilute aqueous ammonia and dilute aqueous sodium bicarbonate. The free forms differ somewhat from their respective salt forms in certain physical properties, such as solubility in polar solvents, but for the purposes of the present disclosure such acid salts and alkaline salts are otherwise pharmaceutically equivalent to their respective free forms.

The pharmaceutically acceptable salts of the present disclosure can be synthesized from compounds of the present disclosure containing either a basic or acidic portion by conventional chemical methods. Typically, salts of basic compounds are prepared by ion exchange chromatography or by a reaction of a free base and a stoichiometric amount or excess of an inorganic or organic acid in the desired salt form in a suitable solvent or a combination of solvents. Similarly, salts of acidic compounds are formed by a reaction with a suitable inorganic or organic base.

Thus, pharmaceutically acceptable salts of the compounds of the present disclosure include conventional non-toxic salts of the compounds of the present disclosure formed by a reaction of a basic compound of the present disclosure with an inorganic or organic acid. For example, the conventional non-toxic salts include salts obtained from inorganic acids such as hydrochloric acid, hydrobromic acid, sulfuric acid, sulfamic acid, phosphoric acid, nitric acid, etc., as well as organic acids such as acetic acid, propionic acid, succinic acid, glycolic acid, stearic acid, lactic acid, malic acid, tartaric acid, citric acid, ascorbic acid, embonic acid, maleic acid, hydroxylmaleic acid, phenylacetic acid, glutamic acid, benzoic acid, salicylic acid, p-aminobenzenesulfonic acid, 2-acetoxybenzoic acid, fumaric acid, toluenesulfonic acid, methanesulfonic acid, ethanedisulfonic acid, oxalic acid, hydroxylethyl sulfonic acid, trifluoroacetic acid, etc.

If the compounds of the disclosure are acidic, the appropriate “pharmaceutically acceptable salt” refers to salts prepared from pharmaceutically acceptable non-toxic bases, including inorganic and organic bases. Salts obtained from inorganic bases include aluminum salts, ammonium salts, calcium salts, copper salts, iron salts, ferrous salts, lithium salts, magnesium salts, manganese salts, manganous salts, potassium salts, sodium salts, and zinc salts. Particularly preferred salts are ammonium salts, calcium salts, magnesium salts, potassium salts, and sodium salts. Salts obtained from pharmaceutically acceptable organic non-toxic bases include salts of primary amines, secondary amines and tertiary amines. The substituted amines include naturally occurring substituted amines, cyclic amines, and basic ion-exchanged resins, such as arginine, betaine, caffeine, choline, N,N′-dibenzyl ethylenediamine, diethylamine, 2-diethylaminoethanol, 2-dimethylaminoethanol, aminoethanol, ethanolamine, ethylenediamine, N-ethylmorpholine, N-ethylpiperidine, glucosamine, aminoglucose, histidine, hydroxocobalamin, isopropylamine, lysine, methylglucosamine, morpholine, piperazine, piperidine, polyamine resin, procaine, purine, theobromine, triethylamine, trimethylamine, tripropylamine, and trometamol.

Berg et al, “Pharmaceutical Salts” J. Pharm. Sci. 1977: 66: 1-19 describes in more details about the preparation of the pharmaceutically acceptable salts described above, and the preparation of other typical pharmaceutically acceptable salts.

The deprotonated acidic portion of a compound such as carboxyl group can be anionic under physiological conditions. This charge can be counterbalanced by protonated or alkylated basic portion with cations inside, such as a tetravalent nitrogen atom. It should be noted that the compounds of the present disclosure are potential internal salts or amphoteric ions.

In one embodiment, the present application provides a method of treating hyperproliferative disease or condition such as tumor in human or other mammals by using the compounds with the structure shown in formula (I), formula (II), and formula (III), and their pharmaceutically acceptable salts.

In one embodiment, the compounds designed in the present application and their pharmaceutically acceptable salts can be used to treat or control non-small cell lung cancer, small cell lung cancer, lung adenocarcinoma, squamous lung cancer, pancreatic cancer, breast cancer, prostate cancer, liver cancer, skin cancer, epithelial cell cancer, gastrointestinal stromal tumor, endometrial cancer, histiocytic lymphoma, nasopharyngeal cancer, head and neck tumor, colon cancer, rectal cancer, glioma, malignant melanoma, kidney cancer, bladder cancer, ovarian cancer, cervical cancer, laryngeal cancer or multiple myeloma, B lymphoma, leukemia, hyperglycemia, diabetes mellitus, obesity, atherosclerosis, metabolic syndrome, liver fibrosis, nonalcoholic fatty liver, gallstones, hyperlipidemia, hypercholesterolemia, hyperlipoproteinemia, hypertriglyceridemia, hypertension, hyperinsulinemia, hyperuricemia, Parkinson's disease, Alzheimer's disease, etc.

Pharmaceutical Compositions

The disclosure also provides pharmaceutical compositions including active ingredients in a safe and effective amount of range, and pharmaceutically acceptable carriers.

The “active ingredients” described in the present disclosure include the compounds of formula (I), formula (II), and formula (III) described in the present disclosure.

The “active ingredients” and the pharmaceutical compositions described in the present disclosure can be used as TRK inhibitors. In another preferred example, the “active ingredients” and the pharmaceutical compositions are used in the manufacture of drugs for the prevention and/or treatment of tumors.

The “safe and effective amount” means that the amount of the active ingredient is sufficient to significantly improve the condition without causing serious side effects.

The “pharmaceutically acceptable carriers” means one or more compatible solid or liquid filler or gel substances that are suitable for human use, and must have enough purity and low toxicity.

“Compatible” here means that each of components of the compositions can be blended with each other with the active ingredients in the present disclosure without significantly reducing the efficacy of the active ingredient.

Some examples of the pharmaceutically acceptable carriers are cellulose and its derivatives (e.g. sodium carboxymethyl cellulose, sodium ethyl cellulose, cellulose acetate, etc.), gelatin, talc, solid lubricants (e.g. stearic acid, magnesium stearate, etc.), calcium sulfate, vegetable oils (e.g. soybean oil, sesame oil, peanut oil, olive oil, etc.), polyols (e.g. propylene glycol, glycerol, mannitol, sorbitol, etc.), emulsifiers (e.g. Tween®), wetting agents (such as sodium dodecyl sulfate), coloring agents, flavoring agents, stabilizers, antioxidants, preservatives, pyrogen-free water, etc.

In another preferred example, the compounds of formula (I), formula (II), and formula (III) of the present disclosure may form a complex with macromolecular compound or polymer by a non-bonding interaction. In another preferred example, the compounds of formula (I), formula (II), and formula (III) of the present disclosure as small molecules may also be linked by chemical bonds through macromolecular compound or polymer. The macromolecular compounds can be biological macromolecules such as polysaccharides, proteins, nucleic acids, and polypeptides, etc.

The mode of administration of the active ingredients or pharmaceutical compositions of the present disclosure is not particularly limited. The representative modes of administration include (but are not limited to): oral, intratumoral, rectal, parenteral (intravenous, intramuscular or subcutaneous) administration.

Solid dosage forms used for oral administration include capsules, tablets, pills, powders and granules.

In these solid dosage forms, the active ingredient is mixed with at least one of the conventional inert excipients (or carriers), such as sodium citrate or dicalcium phosphate, or the mixture of the following ingredients:

(a) fillers or compatibilizers, such as starch, lactose, sucrose, glucose, mannitol, and silicic acid;

(b) binders, such as hydroxylmethylcellulose, alginate, gelatin, polyvinylpyrrolidone, sucrose, and gum arabic;

(c) humectants, such as glycerin;

(d) disintegrants, such as agar, calcium carbonate, potato starch or tapioca starch, alginic acid, certain complex silicates, and sodium carbonate;

(e) dissolution-slowing agents, such as paraffin wax;

(f) absorption accelerators, such as quaternary amine compounds;

(g) wetting agents, such as cetyl alcohol and glycerol monostearate;

(h) adsorbents, such as kaoline; and

(i) lubricants, such as talc, calcium stearate, magnesium stearate, solid polyethylene glycol, sodium dodecyl sulfate, or the mixtures thereof. In capsules, tablets and pills, the dosage form may also contain buffering agents.

The above-described solid dosage forms may also be prepared using coatings and shell materials, such as enteric coatings and other materials well known in the art. They may contain opacifying agents and the release of the active ingredient in such compositions may be released in a delayed manner at a certain part in the digestive tract. Examples of embedding components that may be employed are polymeric substances and waxes.

Liquid dosage forms for oral administration include pharmaceutically acceptable emulsifiers, solutions, suspensions, syrups, or tinctures. In addition to the active ingredient, the liquid dosage forms may contain inert diluents conventionally employed in the art, such as water or other solvents, solubilizers, and emulsifiers, such as ethanol, isopropyl alcohol, ethyl carbonate, ethyl acetate, propylene glycol, 1,3-butanediol, dimethylformamide, and oils, in particular cottonseed oil, peanut oil, corn germ oil, olive oil, castor oil and sesame oil, or mixtures of these substances. In addition to these inert diluents, the compositions may also contain adjuvants such as wetting agents, emulsifying agents and suspending agents, sweeteners, flavoring agents and perfuming agents.

In addition to the active ingredient, the suspension may contain suspending agents, such as ethoxylated isooctadecanol, polyoxyethylene sorbitol and dehydrated sorbitol esters, microcrystalline cellulose, aluminium methoxide and agar, or mixtures of these substances and the like.

Compositions for parenteral injection may include physiologically acceptable sterile aqueous or anhydrous solutions, dispersions, suspensions or emulsions, and sterile powders for redissolution into sterile injectable solutions or dispersions. Suitable aqueous and anhydrous carriers, diluents, solvents, or excipients include water, ethanol, polyols, and suitable mixtures thereof.

The compounds of the present disclosure can be administered alone or in combination with other therapeutic agents (e.g., hypoglycemic agents).

An application of the pharmaceutical composition is to administer a safe and effective amount of the compound of the present disclosure to a mammal (e.g, a human) in need of treatment, wherein the dose is administered at a pharmacologically effective dose. Of course, the route of administration, the patient's health status, and other factors should also be considered to determine the specific dosage, which are all within the skill of the skilled practitioner.

Combination Medication

The compounds of formula (I), formula (II), and formula (III) can be used in combination with other drugs known to treat or improve similar conditions. During co-administration, the original drug administration mode and dosage remain unchanged, while the compounds of formula (I), formula (II), and formula (III) are administered simultaneously or subsequently. When the compounds of formula (I), formula (II), and formula (III) are administered simultaneously with one or more other drugs, it is preferable to use a pharmaceutical composition containing one or more known drugs together with the compounds of formula (I), formula (II), and formula (III). Drug combinations also include administration of the compounds of formula (I), formula (II), and formula (III) with one or more other known drugs at overlapping time periods. When the compounds of formula (I), formula (II), and formula (III) are administered in combination with one or more other drugs, it is possible that the dosage of the compounds of formula (I), formula (II), and formula (III) or the known drugs is lower than when they are administered alone.

The drugs or active ingredients that can be used in combination with the compounds of formula (I), formula (II), and formula (III) include, but are not limited to:

estrogen receptor modulators, androgen receptor modulators, retina-like receptor modulators, cytotoxic/cytostatic agents, antiproliferative agents, protein transferase inhibitors, HMG-CoA reductase inhibitors, HIV protein kinase inhibitors, reverse transcriptase inhibitors, angiogenesis inhibitors, inhibitors of cell proliferation and survival signaling, drugs that interfere with cell cycle checkpoints and apoptosis inducers, cytotoxic drugs, tyrosine protein inhibitors, EGFR inhibitors, VEGFR inhibitors, serine/threonine protein inhibitors, Bcr-Abl inhibitors, c-Kit inhibitors, Met inhibitors, Raf inhibitors, MEK inhibitors, MMP inhibitors, topoisomerase inhibitors, histidine deacetylase inhibitors, proteasome inhibitors, CDK inhibitors, Bcl-2 family protein inhibitors, MDM2 family protein inhibitors, IAP family protein inhibitors, STAT family protein inhibitors, PI3K inhibitors, AKT inhibitors, integrin blockers, interferon-α, interleukin-12, COX-2 inhibitors, p53, p53 activators, VEGF antibodies, EGF antibodies, etc.

In one embodiment, the drugs or active ingredients that can be used in combination with the compounds of formula (I) include, but are not limited to: aldesleukin, alendronic acid, interferon, alitretinoin, allopurinol, allopurinol sodium, palonosetron hydrochloride, altretamine, aminoglutethimide, amifostine, amrubicin, amsacrine, anastrozole, dolasetron, aranesp, arglabin, arsenic trioxide, aromasin, 5-azacytidine, azathioprine, BCG vaccine or tice BCG vaccine, bestatin, betamethasone acetate, a betamethasone sodium phosphate preparation, bexarotene, bleomycin sulfate, broxuridine, bortezomib, busulfan, calcitonin, alemtuzumab injection, capecitabine, carboplatin, casodex, cefesone, celmoleukin, daunorubicin, chlorambucil, cisplatin, cladribine, clodronic acid, cyclophosphamide, cytarabine, dacarbazine, actinomycin D, daunorubicin liposome, dexamethasone, dexamethasone phosphate, estradiol valerate, denileukin diftitox 2, depo-medrol, deslorelin, dexrazoxane, diethylstilbestrol, fluconazole, docetaxel, doxifluridine, adriamycin, dronabinol, a holmium-166-chitosan complex, eligard, rasburicase, epirubicin hydrochloride, aprepitant, epirubicin, epoetin alfa, erythropoietin, eptaplatin, levamisole tablets, estradiol preparations, 17-beta-estradiol, estramustine sodium phosphate, ethinyloestradiol, amifostine, hydroxyphosphoric acid, etopophos, etoposide, fadrozole, tamoxifen preparations, filgrastim, finasteride, fluorouridine, fluconazole, fludarabine, 5-fluorodeoxyuridine monophosphate, 5-fluorouracil, fluoxymesterone, flutamide, formestan, 1-β-D-arabinofuranosylcytosine-5′-stearyl phosphate, fotemustine, fulvestrant, gammaglobulin, gemcitabine, gemtuzumab, imatinib mesylate, gliadel, goserelin, granisetron hydrochloride, histrelin, hycamtin, hydrocortisone, erythro-hydroxynonyladenine, hydroxyurea, ibritumomab tiuxetan, idarubicin, ifosfamide, interferon alpha, interferon-α2, interferon-alpha-2A, interferon-alpha-2B, interferon-alpha-nl, interferon-alpha-n3, interferon-beta, interferon-gamma-la, interleukin-2, intron A, iressa, irinotecan, kytril, lentinan sulfate, letrozole, leucovorin, leuprolide, leuprolide acetate, levamisole, calcium levofolinate, levothyroxine sodium, a levothyroxine sodium preparation, lomustine, lonidamine, dronabinol, chlormethine, mecobalamin, medroxyprogesterone acetate, megestrol acetate, melphalan, esterified estrogen, 6-mercaptopurine, mesna, methotrexate, methyl aminolevulinate, miltefosine, minocycline, mitomycin C, mitotane, mitoxantrone, trilostane, doxorubicin citrate liposome, nedaplatin, pegfilgrastim, oprelvekin, neupogen, nilutamide, tamoxifen, NSC-631570, recombinant human interleukin 1-β, octreotide, ondansetron hydrochloride, a prednisolone oral solution, oxaliplatin, paclitaxel, a prednisolone sodium phosphate preparation, pegaspargase, Pegasys, pentostatin, picibanil, pilocarpine hydrochloride, pirarubicin, plicamycin, porfimer sodium, prednimustine, prednisolone steaglate, prednisone, premarin, procarbazine, recombinant human erythropoietin, raltitrexed, rebif, rhenium-186 etidronate, rituximab, roferon-A, romurtide, pilocarpine hydrochloride tablets, octreotide, sargramostim, semustine, sizofiran, sobuzoxane, solu-medrol, sparfosic acid, stem-cell therapy, streptozocin, strontium-89 chloride, synthroid, tamoxifen, tamsulosin, tasonermin, tastolactone, taxotere, teceleukin, temozolomide, teniposide, testosterone propionate, methyltestosterone, thioguanine, thiotepa, thyrotropin, tiludronic acid, topotecan, toremifene, tositumomab, trastuzumab, treosulfan, tretinoin, methotrexate tablets, trimethylmelamine, trimetrexate, triptorelin acetate, triptorelin pamoate, UFT, uridine, valrubicin, vesnarinone, vinblastine, vincristine, vindesine, vinorelbine, virulizin, dexrazoxane, zinostatin stimalamer, zofran, paclitaxel protein stabilizers, acolbifene, interferon r-lb, affinitak, aminopterin, arzoxifene, asoprisnil, atamestane, atrasentan, BAY43-9006, avastin, CCI-779, CDC-501, celebrex, cetuximab, crisnatol, cyproterone acetate, decitabine, DN-101, doxorubicin-MTC, dSLIM, dutasteride, edotecarin, eflornithine, exatecan, fenretinide, histamine dihydrochloride, a histrelin hydrogel implant, holmium-166 DOTMP, ibandronic acid, interferon gamma, intron-PEG, ixabepilone, keyhole limpet hemocyanin, L-651582, lanreotide, lasofoxifene, libra, lonafarnib, miproxifene, minodronate, MS—209, liposomal MTP-PE, MX-6, nafarelin, nemorubicin, neovastat, nolatrexed, oblimersen, onco-TCS, osidem, paclitaxel polyglutamate, pamidronate disodium, PN-401, QS—21, quazepam, R-1549, raloxifene, ranpirnase, 13-cis-retinoic acid, satraplatin, seocalcitol, T-138067, tarceva, paclitaxel docosahexaenoate, thymosin α1, tiazofurine, tipifarnib, tirapazamine, TLK-286, toremifene, TransMID-107R, valspodar, vapreotide, vatalanib, verteporfin, vinflunine, Z-100, zoledronic acid, or a combination thereof.

The above-mentioned features in the present disclosure, or the features mentioned in the embodiments, may be combined arbitrarily. All features disclosed in the description of the present disclosure may be used in combination with any composition forms, and each feature disclosed in the description may be replaced by any alternative features that serve the same, equivalentor similar purpose. Thus, unless otherwise stated, the features disclosed are only general examples of equivalent or similar features.

The present disclosure is further described below in connection with specific embodiments. It should be understood that these embodiments are intended to illustrate the invention only and are not intended to limit the scope of the invention. The experimental methods for which specific conditions are not indicated in the following embodiments generally follow conventional conditions such as those described in Sambrook et al., Molecular Cloning: A Laboratory Manual (New York: Cold Spring Harbor Laboratory Press, 1989), or conditions as recommended by the manufacturer. Percentages and portions are calculated by weight unless otherwise stated.

Unless otherwise defined, all professional and scientific terms used herein have the same meaning as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to those described herein may be applied to the methods of the present disclosure. The methods and materials of the preferred embodiment described herein are for illustrative purposes only.

The reagents used in the following embodiments are all commercially available.

The following are specific embodiments.

Example 1: Preparation of (E)-5-benzyl-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-048)

Step 1: Preparation of 1-(tetrahydro-2H-pyran-2-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indazole (Compound 1)

1H-indazole-5-boronic acid pinacol ester (5 g, 20.5 mmol) and p-toluenesulfonic acid (352 mg, 2.05 mmol) were dissolved in 50 mL of dichloromethane and DHP (5.17 g, 61.5 mmol) was slowly added under ice bath. After addition, the temperature of the mixture was slowly raised to room temperature and stirred overnight. After the reaction was completed, 50 mL of dichloromethane was added for diluting, and the diluted reaction solution was extracted with a saturated sodium bicarbonate solution (100 mL). The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction and evaporated to dryness. Column chromatography was performed to give 5.5 g of the compound 1 (yield: 81.8%). ¹H NMR (400 MHz, DMSO-d₆) δ 8.23-8.09 (m, 2H), 7.78-7.61 (m, 2H), 5.85 (dd, J=9.7, 2.5 Hz, 1H), 3.93-3.83 (m, 1H), 3.73 (ddd, J=11.4, 8.0, 5.9 Hz, 1H), 2.46-2.31 (m, 1H), 2.09-1.88 (m, 2H), 1.84-1.65 (m, 1H), 1.58 (dq, J=8.8, 5.4, 4.6 Hz, 2H), 1.31 (s, 12H).

LCMS (ESI), m/z: 329.2 [M+H]⁺

Step 2: Preparation of 5-benzyl-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (Compound 2)

Compound 1 (1 g, 3 mmol), benzyl bromide (1.05 g, 6 mmol), and sodium carbonate (650 mg, 6 mmol) were dissolved in a mixed solution of 40 mL of tetrahydrofuran and 8 mL of water, replaced with argon three times, and tetrakis(triphenylphosphine)palladium (352 mg, 0.3 mmol) was added, and the mixture was replaced with argon three times again; and the reaction was carried out overnight at 70° C. After the reaction was completed, THF was removed by rotary evaporation, and ethyl acetate and water were added for extraction. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness; and column chromatography was performed to give 650 mg of compound 2. (yield: 73.0%). ¹H NMR (400 MHz, DMSO-d₆) δ 8.03 (d, J=0.8 Hz, 1H), 7.65-7.60 (m, 1H), 7.58 (q, J=0.8 Hz, 1H), 7.30-7.21 (m, 5H), 7.20-7.14 (m, 1H), 5.79 (dd, J=9.7, 2.6 Hz, 1H), 4.04 (s, 2H), 3.85 (dtd, J=11.5, 3.8, 1.6 Hz, 1H), 3.70 (ddd, J=11.4, 8.1, 5.9 Hz, 1H), 2.46-2.33 (m, 1H), 2.07-1.88 (m, 2H), 1.73 (tddd, J=14.6, 12.3, 6.8, 3.8 Hz, 1H), 1.61-1.50 (m, 2H). LCMS (ESI), m/z: 293.1 [M+H]⁺.

Step 3: Preparation of 5-benzyl-1H-indazole (Compound 3)

Compound 2 (500 mg, 1.71 mmol) was dissolved in 10 mL of dichloromethane, 5 mL of trifluoroacetic acid was added thereto and the mixture was stirred for 4 hours at room temperature. After the reaction was completed, the solvent was removed by evaporation, and saturated sodium carbonate solution was added to adjust the pH to be alkaline, followed by extraction with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness, and column chromatography was performed to give 276 mg of Compound 3 (yield: 77.5%). ¹H NMR (400 MHz, DMSO-d₆) δ 12.96 (s, 1H), 7.99 (s, 1H), 7.57 (s, 1H), 7.45 (d, J=8.6 Hz, 1H), 7.31-7.12 (m, 6H), 4.02 (s, 2H). LCMS (ESI), m/z: 209.1 [M+H]⁺

Step 4: Preparation of 5-benzyl-3-iodo-1H-indazole (Compound 4)

Compound 3 (250 mg, 1.2 mmol) was dissolved in 20 mL of DMF, and 12 (610 mg, 2.4 mmol) and K₂CO₃ (330 mg, 2.4 mmol) were added thereto, and the mixture was stirred at room temperature overnight. After the reaction was completed, a large amount of ice water was added to the reaction flask to precipitate a solid. After stirring for 15 min, suction filtration was performed. The filter residue was washed with water three times and dried to give 380 mg of Compound 4 (yield: 94.7%). ¹H NMR (400 MHz, DMSO-d₆) δ 13.42 (s, 1H), 7.46 (d, J=8.5 Hz, 1H), 7.32-7.22 (m, 6H), 7.21-7.14 (m, 1H), 4.07 (s, 2H). LCMS (ESI), m/z: 335.0 [M+H]⁺

Step 5: Preparation of 5-benzyl-3-iodo-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (Compound 5)

Compound 4 (350 mg, 1.05 mmol), and p-toluenesulfonic acid (18 mg, 0.1 mmol) were dissolved in 10 mL of dichloromethane, and DHP (265 mg, 3.14 mmol) was slowly added thereto under ice bath. After the addition was completed, the temperature of the mixture was slowly raised to room temperature and stirred overnight. After the reaction was completed, 10 mL of dichloromethane was added for diluting, and the diluted reaction solution was extracted with saturated sodium bicarbonate solution (20 mL). The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness, and column chromatography was performed to give 333 mg of Compound 5 (yield: 76.2%).

LCMS (ESI), m/z: 419.1 [M+H]⁺

Step 6: Preparation of (E)-5-benzyl-3-(2-(pyridin-2-yl)vinyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (Compound 6)

Compound 5 (300 mg, 0.72 mmol) was dissolved in 10 mL of DMF, and 2-vinylpyridine (150 mg, 1.44 mmol) and DIEA (280 mg, 2.16 mmol) were added, performed argon replacement three times. Then, palladium acetate (9 mg, 0.04 mmol) and tris(o-methylphenyl)phosphine (22 mg, 0.07 mmol) were added, performed argon replacement three times again. The reaction was carried out at 100° C. overnight. After the reaction was completed, an appropriate amount of water was added, followed by extraction with ethyl acetate three times. The organic layer was washed for four times with water and once with saturated brine, dried over anhydrous sodium sulfate, filtered by suction and evaporated to dryness, and column chromatography was performed to give 154 mg of Compound 6 (yield: 54.1%). ¹H NMR (400 MHz, DMSO-d₆) δ 8.61 (ddd, J=4.8, 1.7, 0.8 Hz, 1H), 8.10-8.06 (m, 1H), 7.92 (d, J=16.4 Hz, 1H), 7.82 (td, J=7.6, 1.8 Hz, 1H), 7.72-7.65 (m, 2H), 7.58 (d, J=16.3 Hz, 1H), 7.36-7.24 (m, 6H), 7.22-7.13 (m, 1H), 5.85 (dd, J=9.7, 2.5 Hz, 1H), 4.12 (s, 2H), 3.94-3.82 (m, 1H), 3.81-3.66 (m, 1H), 2.48-2.34 (m, 1H), 2.13-1.90 (m, 2H), 1.83-1.67 (m, 1H), 1.60 (dq, J=8.4, 4.2 Hz, 2H). LCMS (ESI), m/z: 396.2 [M+1-1]⁺

Step 7: Preparation of (E)-5-benzyl-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (Compound 7)

Compound 6 (150 mg, 0.38 mmol) was dissolved in 5 mL of dichloromethane, and 5 mL of trifluoroacetic acid was added thereto; and the mixture was stirred for 4 hours at room temperature. After the reaction was completed, the solvent was removed by evaporation. Saturated sodium carbonate solution was added to adjust the pH to 6-7, followed by extraction with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness, and column chromatography was performed to give 90 mg of Compound 7 (yield: 76.4%). ¹H NMR (400 MHz, DMSO-d₆) δ 13.22 (s, 1H), 8.63-8.57 (m, 1H), 8.08 (s, 1H), 7.95 (d, J=16.4 Hz, 1H), 7.81 (td, J=7.6, 1.9 Hz, 1H), 7.67 (dt, J=7.8, 1.1 Hz, 1H), 7.55 (d, J=16.4 Hz, 1H), 7.48 (d, J=8.5 Hz, 1H), 7.33-7.23 (m, 6H), 7.17 (dtdd, J=8.8, 6.2, 4.2, 2.1 Hz, 1H), 4.11 (s, 2H). LCMS (ESI), m/z: 312.1 [M+H]⁺

Example 2: Preparation of (E)-5-(2-fluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-032)

Synthesis method was as Example 1 (yield: 70.5%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.27 (s, 1H), 8.61 (dd, J=5.0, 1.7 Hz, 1H), 8.07 (s, 1H), 7.95 (d, J=16.3 Hz, 1H), 7.82 (td, J=7.6, 1.8 Hz, 1H), 7.68 (d, J=7.8 Hz, 1H), 7.57-7.46 (m, 2H), 7.35 (td, J=7.8, 1.9 Hz, 1H), 7.27 (dddd, J=9.3, 5.0, 3.9, 1.5 Hz, 3H), 7.22-7.11 (m, 2H), 4.15 (s, 2H). LCMS (ESI), m/z: 330.1 [M+H]⁺

Example 3: Preparation of (E)-5-(3-fluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-038)

Synthesis method was as Example 1 (yield: 77.2%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.28 (s, 1H), 8.61 (dd, J=5.0, 1.7 Hz, 1H), 8.13 (s, 1H), 7.98 (d, J=16.4 Hz, 1H), 7.82 (td, J=7.6, 1.8 Hz, 1H), 7.69 (d, J=7.8 Hz, 1H), 7.59 (d, J=16.4 Hz, 1H), 7.51 (d, J=8.6 Hz, 1H), 7.38-7.22 (m, 3H), 7.19-7.10 (m, 2H), 7.05-6.94 (m, 1H), 4.13 (s, 2H).

LCMS (ESI), m/z: 330.1 [M+H]⁺

Example 4: Preparation of (E)-5-(4-fluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-042)

Synthesis method was as Example 1 (yield: 71.2%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.24 (s, 1H), 8.60 (dd, J=4.9, 1.7 Hz, 1H), 8.09 (s, 1H), 7.95 (d, J=16.4 Hz, 1H), 7.82 (td, J=7.6, 1.9 Hz, 1H), 7.68 (d, J=7.8 Hz, 1H), 7.55 (d, J=16.4 Hz, 1H), 7.48 (d, J=8.6 Hz, 1H), 7.38-7.29 (m, 2H), 7.30-7.21 (m, 2H), 7.16-7.06 (m, 2H), 4.10 (s, 2H).

LCMS (ESI), m/z: 330.1 [M+H]⁺

Example 5: Preparation of (E)-5-(2,3-difluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-082)

Synthesis method was as Example 1 (yield: 74.7%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.28 (s, 1H), 8.60 (dd, J=4.9, 1.7 Hz, 1H), 8.09 (s, 1H), 7.94 (d, J=16.4 Hz, 1H), 7.82 (td, J=7.7, 1.9 Hz, 1H), 7.68 (d, J=7.8 Hz, 1H), 7.58-7.48 (m, 2H), 7.28 (qt, J=6.7, 2.5 Hz, 3H), 7.19-7.10 (m, 2H), 4.19 (s, 2H).

LCMS (ESI), m/z: 348.1 [M+H]⁺

Example 6: Preparation of (E)-5-(2,4-difluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-060)

Synthesis method was as Example 1 (yield: 70.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.60 (s, 1H), 8.78 (dd, J=5.2, 1.4 Hz, 1H), 8.35-8.28 (m, 2H), 8.22 (d, J=16.5 Hz, 1H), 8.08 (s, 1H), 7.72-7.62 (m, 2H), 7.57 (d, J=8.6 Hz, 1H), 7.37 (td, J=8.7, 6.6 Hz, 1H), 7.29 (dd, J=8.6, 1.4 Hz, 1H), 7.22 (td, J=9.9, 2.6 Hz, 1H), 7.04 (td, J=8.6, 2.6 Hz, 1H), 4.12 (s, 2H).

LCMS (ESI), m/z: 348.1 [M+H]⁺

Example 7: Preparation of (E)-5-(2,5-difluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-054)

Synthesis method was as Example 1 (yield: 76.4%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.28 (s, 1H), 8.61 (dd, J=5.0, 1.7 Hz, 1H), 8.09 (s, 1H), 7.95 (d, J=16.4 Hz, 1H), 7.81 (td, J=7.7, 1.8 Hz, 1H), 7.67 (d, J=7.8 Hz, 1H), 7.59-7.47 (m, 2H), 7.32-7.17 (m, 4H), 7.15-7.02 (m, 1H), 4.13 (s, 2H).

LCMS (ESI), m/z: 348.1 [M+H]⁺

Example 8: Preparation of (E)-5-(2,6-difluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-081)

Synthesis method was as Example 1 (yield: 65.2%).

LCMS (ESI), m/z: 348.1 [M+H]⁺

Example 9: Preparation of (E)-5-(3,4-difluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-059)

Synthesis method was as Example 1 (yield: 68.8%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.26 (s, 1H), 8.61 (dd, J=4.8, 1.7 Hz, 1H), 8.12 (s, 1H), 7.96 (d, J=16.3 Hz, 1H), 7.82 (td, J=7.7, 1.8 Hz, 1H), 7.68 (d, J=7.8 Hz, 1H), 7.62-7.45 (m, 2H), 7.43-7.22 (m, 4H), 7.14 (ddt, J=8.2, 3.7, 1.6 Hz, 1H), 4.10 (s, 2H).

LCMS (ESI), m/z: 348.1 [M+H]⁺

Example 10: Preparation of (E)-5-(3,5-difluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as CCB-489)

Synthesis method was as Example 1 (yield: 73.5%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.27 (s, 1H), 8.61 (d, J=3.9 Hz, 1H), 8.14 (s, 1H), 7.97 (d, J=16.4 Hz, 1H), 7.83 (td, J=7.7, 1.7 Hz, 1H), 7.68 (d, J=7.8 Hz, 1H), 7.57 (d, J=16.4 Hz, 1H), 7.51 (d, J=8.5 Hz, 1H), 7.34-7.24 (m, 2H), 7.11-6.98 (m, 3H), 4.13 (s, 2H). LCMS (ESI), m/z: 348.1 [M+H]⁺

Example 11: Preparation of (E)-3-(2-(pyridin-2-yl)vinyl)-5-(3,4,5-trifluorobenzyl)-1H-indazole (designated as DYX-083)

Synthesis method was as Example 1 (yield: 79.2%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.28 (s, 1H), 8.61 (dd, J=4.6, 1.7 Hz, 1H), 8.13 (s, 1H), 7.96 (d, J=16.4 Hz, 1H), 7.83 (td, J=7.7, 1.9 Hz, 1H), 7.69 (d, J=7.9 Hz, 1H), 7.62-7.46 (m, 2H), 7.35-7.23 (m, 4H), 4.09 (s, 2H).

LCMS (ESI), m/z: 366.1 [M+H]⁺

Example 12: Preparation of (E)-5-(3-chlorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-134X)

Synthesis method was as Example 1 (yield: 63.3%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.25 (s, 1H), 8.64-8.58 (m, 1H), 8.12 (s, 1H), 8.00-7.92 (m, 1H), 7.82 (td, J=7.6, 1.9 Hz, 1H), 7.68 (d, J=7.8 Hz, 1H), 7.57 (d, J=16.4 Hz, 1H), 7.50 (d, J=8.5 Hz, 1H), 7.37 (t, J=1.8 Hz, 1H), 7.34-7.20 (m, 5H), 4.12 (s, 2H).

LCMS (ESI), m/z: 346.1 [M+H]⁺

Example 13: Preparation of (E)-5-(3-methoxybenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-135X)

Synthesis method was as Example 1 (yield: 66.9%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.25 (s, 1H), 8.60 (d, J=4.8 Hz, 1H), 8.09 (s, 1H), 7.96 (d, J=16.3 Hz, 1H), 7.81 (t, J=7.8 Hz, 1H), 7.68 (d, J=7.9 Hz, 1H), 7.52 (dd, J=31.8, 12.4 Hz, 2H), 7.32-7.14 (m, 3H), 6.93-6.65 (m, 3H), 4.07 (2H) 31.8, 12.4 Hz, 2H), 7.32-7.14 (m, 3H), 6.93-6.65 (m, 3H), 4.07 (s, 2H), 3.71 (s, 3H).

LCMS (ESI), m/z: 342.1 [M+H]⁺

Example 14: Preparation of (E)-3-((3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-yl)methyl)benzonitrile (designated as DYX-136X)

Synthesis method was as Example 1 (yield: 70.5%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.54 (s, 1H), 8.73 (d, J=5.3 Hz, 1H), 8.26-8.10 (m, 4H), 7.79 (s, 1H), 7.67 (q, J=6.7, 4.5 Hz, 3H), 7.55 (ddt, J=20.8, 15.5, 7.1 Hz, 3H), 7.33 (d, J=8.6 Hz, 1H), 4.18 (s, 2H).

LCMS (ESI), m/z: 337.1 [M+H]⁺

Example 15: Preparation of (E)-5-(3-methylbenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-137X)

Synthesis method was as Example 1 (yield: 78.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.25 (s, 1H), 8.60 (d, J=4.8 Hz, 1H), 8.07 (s, 1H), 7.96 (d, J=16.3 Hz, 1H), 7.81 (td, J=7.6, 1.9 Hz, 1H), 7.68 (d, J=7.8 Hz, 1H), 7.56 (d, J=16.4 Hz, 1H), 7.48 (d, J=8.5 Hz, 1H), 7.31-7.20 (m, 2H), 7.16 (t, J=7.4 Hz, 1H), 7.08 (d, J=8.0 Hz, 2H), 6.98 (d, J=7.4 Hz, 1H), 4.06 (s, 2H), 2.24 (s, 3H).

LCMS (ESI), m/z: 326.1 [M+H]⁺

Example 16: Preparation of (E)-3-(2-(pyridin-2-yl)vinyl)-5-(3-(trifluoromethyl)benzyl)-1H-indazole (designated as DYX-138X)

Synthesis method was as Example 1 (yield: 67.0%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.28 (s, 1H), 8.61 (dd, J=5.2, 1.7 Hz, 1H), 8.16 (s, 1H), 7.97 (d, J=16.4 Hz, 1H), 7.84 (td, J=7.7, 1.9 Hz, 1H), 7.72-7.66 (m, 2H), 7.65-7.60 (m, 1H), 7.60-7.48 (m, 4H), 7.32-7.26 (m, 2H), 4.22 (s, 2H).

LCMS (ESI), m/z: 380.1 [M+H]⁺

Example 17: Preparation of (E)-5-(3,5-difluorophenoxy)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-101)

Step 1: Preparation of 4-(3,5-difluorophenoxy)-2-methyl-1-nitrobenzene (Compound 8)

4-fluoro-2-methyl-1-nitrobenzene (5 g, 32.2 mmol) was dissolved in 30 mL of DMF. 3,5-difluorophenol (4.62 g, 35.5 mmol) and potassium carbonate (8.91 g, 64.4 mmol) were added and react at 100° C. for 2 hours. After the reaction was completed, reaction flask was moved to ice bath. The resulting reaction solution was stirred with a large amount of ice water to precipitate solid. After stirring for 30 minutes, suction filtration was performed, and the obtained filter residue was washed with water for five times. The filter residue was dried, slurried with diethyl ether, and filtered by suction to obtain 7.6 g of the compound 8 (yield: 88.9%). ¹H NMR (400 MHz, DMSO-d₆) δ 8.09 (d, J=9.0 Hz, 1H), 7.21 (d, J=2.8 Hz, 1H), 7.20-7.12 (m, 1H), 7.09 (dd, J=9.0, 2.8 Hz, 1H), 7.03-6.94 (m, 2H), 2.53 (s, 3H). LCMS (ESI), m/z: 266.1 [M+H]⁺

Step 2: Preparation of 4-(3,5-difluorophenoxy)-2-methylaniline (Compound 9)

Compound 8 (7 g, 26.4 mmol) and ammonium chloride (4.24 g, 79.2 mmol) were dissolved in a mixed solvent of 100 mL of ethanol and 10 mL of water. Iron powder (7.39 g, 132 mmol) was added slowly with stirring. After addition, the obtained mixture was heated to 80° C. and reacted for 3 hours. After the reaction was completed, diatomite was used for suction filtration. The obtained filter residue was washed with ethyl acetate for three times, and the obtained filtrate was evaporated to dryness. Water and ethyl acetate were added for extraction. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 4.4 g of the compound 9 (yield: 70.9%). ¹H NMR (400 MHz, DMSO-d₆) δ 6.91-6.60 (m, 4H), 6.58-6.42 (m, 2H), 4.89 (s, 2H), 2.06 (s, 3H).

LCMS (ESI), m/z: 236.1 [M+H]⁺

Step 3: Preparation of 4-(3,5-difluorophenoxy)-2-methylbenzenediazonium tetrafluoroborate (Compound 10)

Compound 9 (2 g, 8.5 mmol) was added to a flask contained 20 ml of 40% tetrafluoroboric acid solution. 5 mL of aqueous solution of sodium nitrite (616 mg, 8.9 mmol) was added slowly dropwise at 0° C. After the addition, the obtained mixture was slowly heated to room temperature for a reaction for 6 hours. After the reaction was completed, suction filtration was carried out. Water washing and drying were performed to give 2.1 g of compound 10 (yield: 73.9%).

¹H NMR (400 MHz, DMSO-d₆) δ 8.65 (d, J=9.2 Hz, 1H), 7.47-7.30 (m, 3H), 7.28-7.16 (m, 2H), 2.69 (s, 3H). LCMS (ESI), m/z: 247.0 [M+H]⁺

Step 4: Preparation of 5-(3,5-difluorophenoxy)-1H-indazole (Compound 11)

Compound 10 (2 g, 6 mmol) was dissolved in 10 mL of chloroform. Potassium acetate (1.76 g, 18 mmol) and 18-crown-6 (160 mg, 0.6 mmol) were added, and the obtained mixture was stirred at room temperature overnight. After the reaction was completed, water was added for extraction. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 880 mg of compound 11 (yield: 59.7%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.23 (s, 1H), 8.07 (t, J=1.3 Hz, 1H), 7.62 (dt, J=8.9, 0.9 Hz, 1H), 7.53 (d, J=2.2 Hz, 1H), 7.17 (dd, J=8.9, 2.3 Hz, 1H), 6.94 (tt, J=9.4, 2.3 Hz, 1H), 6.69-6.58 (m, 2H). LCMS (ESI), m/z: 247 [M+H]⁺.

The synthesis methods in remaining steps were the same as those in the steps 4-7 in Example 1 (yield: 67.2%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.44 (s, 1H), 8.59 (ddd, J=4.8, 1.9, 0.9 Hz, 1H), 8.04 (d, J=2.2 Hz, 1H), 7.96 (d, J=16.4 Hz, 1H), 7.79 (td, J=7.6, 1.8 Hz, 1H), 7.71-7.64 (m, 2H), 7.55 (d, J=16.4 Hz, 1H), 7.30-7.21 (m, 2H), 6.95 (tt, J=9.4, 2.3 Hz, 1H), 6.69 (dt, J=8.8, 2.1 Hz, 2H).

LCMS (ESI), m/z: 350.1 [M+H]⁺

Example 18: Preparation of (E)-5-((3,5-difluorophenyl)thio)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-090)

Step 1: Synthesis of 5-((3,5-difluorophenyl)thio)-1H-indazole (Compound 16)

5-Iodo-1H-indazole (2 g, 8.2 mmol), Pd₂(dba)₃ (375 mg, 0.41 mmol), Xantphos (475 mg, 0.82 mmol), and cesium hydroxide monohydrate (2.75 g, 16.4 mmol) were dissolved in 20 mL of DMF with argon replacement for three times. The mixture was heated to 60° C., and slowly added with 3,5-difluorothiophenol (1.32 g, 9.02 mmol) by a syringe. After the addition was completed, the mixture was heated to 80° C. to react for 16 hours. After the reaction was completed, an appropriate amount of water was added, followed by extraction with ethyl acetate for three times. The organic layer was washed with water for three times, and then washed once with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 1.28 g of compound 16 (yield: 59.7%).

¹H NMR (400 MHz, Chloroform-d) δ 8.15 (s, 1H), 8.05-8.00 (m, 1H), 7.59 (d, J=8.6 Hz, 1H), 7.52 (dd, J=8.7, 1.6 Hz, 1H), 6.63-6.51 (m, 3H). LCMS (ESI), m/z: 263.0 [M+H]⁺

The synthesis methods in remaining steps were the same as those in the steps 4-7 in Example 1 (yield: 71.1%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.61 (s, 1H), 8.60 (dd, J=4.8, 1.7 Hz, 1H), 8.55 (d, J=1.5 Hz, 1H), 8.00 (d, J=16.4 Hz, 1H), 7.82 (td, J=7.6, 1.8 Hz, 1H), 7.73 (dd, J=8.3, 6.0 Hz, 2H), 7.63 (d, J=16.4 Hz, 1H), 7.53 (dd, J=8.7, 1.6 Hz, 1H), 7.33-7.24 (m, 1H), 7.05 (tt, J=9.3, 2.3 Hz, 1H), 6.78 (h, J=4.9 Hz, 2H).

LCMS (ESI), m/z: 366.1 [M+H]⁺

Example 19: Preparation of (E)-5-((3,5-difluorophenyl)sulfonyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-114)

Step 1: Synthesis of 5-((3,5-difluorophenyl)sulfonyl)-1H-indazole (Compound 21)

Compound 16 (1 g, 3.8 mmol) was dissolved in a mixed solution of 20 mL of methanol and 10 mL of water. Oxone (3.2 g, 19 mmol) was added and the mixture was stirred overnight at room temperature. After the reaction was completed, methanol was removed by evaporation, and an appropriate amount of ethyl acetate was added for extraction. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 841 mg of compound 21 (yield: 75.0%).

¹H NMR (400 MHz, Chloroform-d) δ 8.56-8.47 (m, 1H), 8.27 (s, 1H), 7.88 (dd, J=8.9, 1.7 Hz, 1H), 7.64 (d, J=8.8 Hz, 1H), 7.55-7.42 (m, 2H), 6.98 (tt, J=8.4, 2.3 Hz, 1H). LCMS (ESI), m/z: 295.0 [M+H]⁺

The synthesis methods in remaining steps were the same as those in the steps 4-7 in Example 1 (yield: 70.0%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.84 (s, 1H), 8.93 (d, J=1.8 Hz, 1H), 8.64 (dd, J=4.7, 1.7 Hz, 1H), 8.07 (d, J=16.3 Hz, 1H), 7.95 (dd, J=8.8, 1.7 Hz, 1H), 7.86 (td, J=7.4, 6.9, 2.1 Hz, 3H), 7.78 (dd, J=8.4, 6.2 Hz, 2H), 7.33 (ddd, J=7.4, 4.7, 1.2 Hz, 1H).

LCMS (ESI), m/z: 398.0 [M+H]⁺

Example 20: Preparation of (E)-N-(3,5-difluorophenyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-105)

Step 1: Synthesis of 5-bromo-3-iodo-1H-indazole (Compound 26)

Compound 26 was synthesized the same as step 4 in Example 1 (yield: 90.8%).

Step 2: Synthesis of 5-bromo-3-iodo-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-indazole (Compound 27)

Compound 26 (3 g, 9.3 mmol) and TBAB (150 mg, 0.46 mmol) were dissolved in 20 mL of DCM. An equal volume of 50% KOH solution was prepared and added, and SEMCl (2.32 g, 13.9 mmol) was added slowly dropwise under stirring in an ice bath. After the addition, the reaction was continued to be carried out for 2 hours. After the reaction was completed, DCM was added for diluting, and the aqueous layer was extracted with DCM for three times. The organic layer was washed twice with water and then washed once with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 2.65 g of compound 27 (yield: 62.9%).

¹H NMR (400 MHz, DMSO-d₆) δ 7.82-7.74 (m, 1H), 7.70-7.61 (m, 2H), 5.75 (s, 2H), 3.53-3.47 (m, 2H), 0.80-0.72 (m, 2H), −0.13 (s, 9H). LCMS (ESI), m/z: 453.0 [M+H]⁺

Step 3: Synthesis of (E)-5-bromo-3-(2-(pyridin-2-yl)vinyl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-indazole (Compound 28)

The synthesis of compound 28 from compound 27 was performed the same as step 6 in Example 1 (yield: 59.6%). ¹H NMR (400 MHz, DMSO-d₆) δ 8.61 (ddd, J=4.8, 1.8, 0.9 Hz, 1H), 8.52-8.45 (m, 1H), 7.93 (d, J=16.4 Hz, 1H), 7.87-7.70 (m, 3H), 7.68-7.57 (m, 2H), 7.29 (ddd, J=7.5, 4.7, 1.2 Hz, 1H), 5.79 (s, 2H), 3.54 (dd, J=8.5, 7.4 Hz, 2H), 0.87-0.73 (m, 2H), −0.12 (s, 9H). LCMS (ESI), m/z: 430.1 [M+H]⁺

Step 4: Synthesis of (E)-N-(3,5-difluorophenyl)-3-(2-(pyridin-2-yl)vinyl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-indazol-5-amine (Compound 29)

Compound 28 (500 mg, 1.16 mmol), 3,5-difluoroaniline (225 mg, 1.74 mmol), cesium carbonate (756 mg, 2.32 mmol), Pd₂(dba)₃ (55 mg, 0.06 mmol), and Xantphos (69 mg, 0.12 mmol) were added sequentially to a two-necked flask with argon replacement for three times. 20 mL of anhydrous dioxane was added, argon replacement was performed for three times, and a reaction was carried out at 90° C. overnight. After the reaction was completed, dioxane was removed by evaporation, and water was added, followed by extraction with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 232 mg of compound 29 (yield: 41.7%). ¹H NMR (400 MHz, DMSO-d₆) δ 8.71 (s, 1H), 8.60 (ddd, J=4.8, 1.8, 0.9 Hz, 1H), 7.97-7.85 (m, 2H), 7.85-7.74 (m, 2H), 7.69 (dt, J=7.9, 1.1 Hz, 1H), 7.52 (d, J=16.4 Hz, 1H), 7.35 (dd, J=8.9, 2.0 Hz, 1H), 7.28 (ddd, J=7.5, 4.8, 1.2 Hz, 1H), 6.61-6.40 (m, 3H), 5.77 (s, 2H), 3.56 (dd, J=8.5, 7.4 Hz, 2H), 0.89-0.74 (m, 2H), −0.10 (s, 9H). LCMS (ESI), m/z: 479.2 [M+1-1]⁺

Step 5: Synthesis of (E)-N-(3,5-difluorophenyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (Compound 30)

Compound 29 (200 mg, 0.42 mml) was dissolved in 5 mL of THF, and TBAF (1.1 g, 4.2 mmol) and ethylenediamine (252 mg, 4.2 mmol) were added. A reflux reaction was carried out for 6 hours. After the reaction was completed, THF was removed by evaporation, and water was added, followed by extraction with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 90 mg of compound 30 (yield: 61.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.33 (s, 1H), 8.74-8.52 (m, 2H), 7.97 (d, J=16.4 Hz, 1H), 7.90-7.78 (m, 2H), 7.71 (d, J=7.9 Hz, 1H), 7.59 (d, J=8.8 Hz, 1H), 7.48 (d, J=16.3 Hz, 1H), 7.28 (t, J=6.6 Hz, 2H), 6.49 (dd, J=34.8, 9.5 Hz, 3H).

LCMS (ESI), m/z: 349.1 [M+H]⁺

Example 21: Preparation of (E)-N-(3,5-difluorophenyl)-N-methyl-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-139)

Step 1: Synthesis of (E)-N-(3,5-difluorophenyl)-N-methyl-3-(2-(pyridin-2-yl)vinyl)-1-((2-(trimethylsilyl) ethoxy)methyl)-1H-indazol-5-amine (Compound 31)

Raw material 29 (200 mg, 0.42 mmol) was dissolved in 10 mL of anhydrous THF, and argon replacement was carried out for three times. Iodomethane (120 mg, 0.84 mmol) was added, and LiHMDS (210 mg, 1.25 mmol) was added slowly dropwise under stirring in an ice bath. After the addition, the reaction was performed at 0° C. for 3 hours. After the reaction was completed, saturated ammonium chloride solution was added for quenching. After THF was removed by evaporation. water was added. Extraction was performed with ethyl acetate, and the organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction and evaporated to dryness. Column chromatography was performed to give 144 mg of compound 31 (yield: 70.0%).

¹H NMR (400 MHz, DMSO-d₆) δ 8.60 (ddd, J=4.8, 1.8, 0.8 Hz, 1H), 8.18-8.10 (m, 1H), 7.95 (d, J=16.4 Hz, 1H), 7.90-7.84 (m, 1H), 7.81 (td, J=7.6, 1.8 Hz, 1H), 7.71 (dt, J=8.0, 1.1 Hz, 1H), 7.61 (d, J=16.3 Hz, 1H), 7.38 (dd, J=8.9, 1.9 Hz, 1H), 7.28 (ddd, J=7.5, 4.8, 1.2 Hz, 1H), 6.45 (tt, J=9.2, 2.3 Hz, 1H), 6.33-6.18 (m, 2H), 5.82 (s, 2H), 3.58 (dd, J=8.4, 7.4 Hz, 2H), 3.37 (s, 3H), 0.88-0.79 (m, 2H), −0.11 (s, 9H). LCMS (ESI), m/z: 493.2 [M+H]⁺

Step 2: Synthesis of (E)-N-(3,5-difluorophenyl)-N-methyl-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (Compound 32)

Compound 32 was synthesized as same as step 5 in Example 20 (yield: 82.4%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.43 (s, 1H), 8.63-8.54 (m, 1H), 8.10 (d, J=1.9 Hz, 1H), 7.97 (d, J=16.4 Hz, 1H), 7.79 (td, J=7.7, 1.9 Hz, 1H), 7.74-7.61 (m, 2H), 7.55 (d, J=16.4 Hz, 1H), 7.31-7.19 (m, 2H), 6.43 (tt, J=9.3, 2.3 Hz, 1H), 6.33-6.14 (m, 2H), 3.34 (s, 3H).

LCMS (ESI), m/z: 363.1 [M+H]⁺

Example 22: Preparation of (E)-5-((3,5-difluorobenzyl)oxo)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-132)

Step 1: Synthesis of 5-((tert-butyldimethylsilyl)oxo)-1H-indazole (Compound 33)

1H-indazol-5-ol (3 g, 22.4 mmol) and imidazole (3.05 g, 44.8 mmol) were dissolved in 30 mL of DMF. TBSCl (5.06 g, 33.6 mmol) was slowly added, and the mixture was stirred at room temperature for 2 hours. After the reaction was completed, water was added. Extraction was performed with ethyl acetate for three times, and the organic layer was washed with water for four times, washed once with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to remove the solvent to obtain 4.96 g of compound 33 (yield: 89.2%). ¹H NMR (400 MHz, DMSO-d₆) δ 12.92 (s, 1H), 7.92 (t, J=1.3 Hz, 1H), 7.41 (dt, J=8.9, 0.9 Hz, 1H), 7.12 (d, J=2.2 Hz, 1H), 6.91 (dd, J=8.8, 2.3 Hz, 1H), 0.96 (s, 9H), 0.17 (s, 6H). LCMS (ESI), m/z: 249.1 [M+H]⁺

Step 2: Synthesis of 5-((tert-butyldimethylsilyl)oxo)-3-iodo-1H-indazole (Compound 34)

Compound 33 (4 g, 16.1 mmol) was dissolved in 40 mL of DCM. NIS (5.4 g, 24.2 mmol) was added, and the mixture was stirred at room temperature for 2 hours. After completion of the reaction, saturated sodium thiosulfate solution was added for quenching, followed by extraction with DCM. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness to give 5.61 g of compound 34 (yield: 93.1%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.40 (s, 1H), 7.45 (dd, J=8.9, 2.4 Hz, 1H), 7.00 (dt, J=9.1, 2.4 Hz, 1H), 6.71 (d, J=2.2 Hz, 1H), 0.96 (d, J=2.7 Hz, 9H), 0.18 (d, J=2.7 Hz, 6H). LCMS (ESI), m/z: 375.0 [M+H]⁺

Step 3: Synthesis of 5-((tert-butyldimethylsilyl)oxo)-3-iodo-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (Compound 35)

The synthesis of compound 35 from compound 34 was performed the same as step 1 in Example 1 (yield: 76.7%). ¹H NMR (400 MHz, DMSO-d₆) δ 7.66 (d, J=9.0 Hz, 1H), 7.09 (dd, J=9.0, 2.2 Hz, 1H), 6.73 (d, J=2.3 Hz, 1H), 5.80 (dd, J=9.9, 2.3 Hz, 1H), 3.87 (dt, J=13.2, 3.0 Hz, 1H), 3.71 (ddd, J=11.4, 8.0, 5.8 Hz, 1H), 2.43-2.26 (m, 1H), 1.98 (tq, J=16.3, 4.1, 3.4 Hz, 2H), 1.72 (tdd, J=15.7, 8.7, 5.0 Hz, 1H), 1.57 (dq, J=8.9, 5.0, 4.3 Hz, 2H), 0.97 (s, 9H), 0.20 (s, 6H). LCMS (ESI), m/z: 459.1 [M+H]⁺

Step 4: Synthesis of 3-iodo-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-ol (Compound 36)

Compound 35 (2 g, 4.4 mmol) was dissolved in 20 mL of THF, and TBAF (5.7 g, 22 mmol) was added under stirring at room temperature. After the addition was completed, the stirring was continued for 2 hours. After the reaction was completed, THF was removed by evaporation, and water was added, followed by extraction with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 1.23 g of compound 36 (yield. 82.0%).

¹H NMR (400 MHz, DMSO-d₆) δ 9.52 (s, 1H), 7.57 (d, J=9.0 Hz, 1H), 7.02 (dd, J=8.9, 2.3 Hz, 1H), 6.65 (d, J=2.2 Hz, 1H), 5.74 (dd, J=9.8, 2.5 Hz, 1H), 3.91-3.80 (m, 1H), 3.69 (ddd, J=11.4, 8.0, 5.8 Hz, 1H), 2.40-2.24 (m, 1H), 2.07-1.87 (m, 2H), 1.81-1.61 (m, 1H), 1.55 (hept, J=3.9 Hz, 2H).

LCMS (ESI), m/z: 345.0 [M+H]⁺

Step 5: Synthesis of 5-((3,5-difluorobenzyl)oxo)-3-iodo-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (Compound 37)

Compound 36 (1.2 g, 3.5 mmol) was dissolved in DMF. 3,5-difluorobenzyl bromide (1.45 g, 7 mmol) and potassium carbonate (960 mg, 7 mmol) were added, and a reaction was carried out at 40° C. overnight. After the reaction was completed, ice water was added, and stirred for 5 minutes to precipitate solid, followed by suction filtration. The obtained filter residue was washed with water for three times, dried and slurried with diethyl ether to give 1.45 g of compound 37 (yield: 88.6%). ¹H NMR (400 MHz, DMSO-d₆) δ 7.70 (d, J=9.1 Hz, 1H), 7.23 (dddd, J=20.1, 11.7, 6.9, 2.4 Hz, 4H), 6.89 (d, J=2.4 Hz, 1H), 5.80 (dd, J=9.8, 2.3 Hz, 1H), 5.22 (s, 2H), 3.86 (dq, J=11.7, 3.0 Hz, 1H), 3.71 (ddd, J=11.4, 8.3, 5.9 Hz, 1H), 2.41-2.23 (m, 1H), 1.97 (ddq, J=19.2, 12.4, 3.1 Hz, 2H), 1.71 (dtdt, J=11.2, 8.7, 6.3, 2.9 Hz, 1H), 1.55 (dq, J=8.6, 4.4, 3.8 Hz, 2H). LCMS (ESI), m/z: 471.0 [M+H]⁺

Compounds 38 to 39 were synthesized the same as step 6-7 in Example 1 (yield: 70.2%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.23 (s, 1H), 8.64-8.56 (m, 1H), 7.96 (d, J=16.3 Hz, 1H), 7.81 (td, J=7.6, 1.8 Hz, 1H), 7.70-7.60 (m, 2H), 7.55-7.43 (m, 2H), 7.32-7.14 (m, 5H), 5.28 (s, 2H).

LCMS (ESI), m/z: 364.1 [M+H]⁺

Example 23: Preparation of (E)-5-((3,5-difluorophenylmethoxy)methyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-176)

The synthesis in step 1-4 was performed as same as step 1-4 in Example 22.

Step 5: Synthesis of 5-((3,5-difluorophenoxy)methyl)-3-iodo-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (Compound 44)

Compound 43 (1.5 g, 4.2 mmol), triphenylphosphine (1.3 g, 5 mmol), and 3,5-difluorophenol (650 mg, 5 mmol) were dissolved in 10 mL of anhydrous THF with argon replacement for three times. DIAD (1.01 g, 5 mmol) was added slowly dropwise by a syringe under stirring in an ice bath. After the addition was completed, a reaction was carried out for 2 hours. After the reaction was completed, THF was removed by evaporation, and water was added, followed by extraction with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 1.17 g of compound 44 (yield: 59.4%). ¹H NMR (400 MHz, DMSO-d₆) δ 7.79 (dd, J=8.6, 0.8 Hz, 1H), 7.61-7.53 (m, 2H), 6.89-6.73 (m, 3H), 5.86 (dd, J=9.8, 2.3 Hz, 1H), 5.26 (s, 2H), 3.87 (dq, J=11.3, 3.2 Hz, 1H), 3.72 (ddd, J=11.4, 8.3, 6.0 Hz, 1H), 2.44-2.28 (m, 1H), 1.99 (tdt, J=16.6, 6.6, 3.1 Hz, 2H), 1.83-1.63 (m, 1H), 1.58 (dhept, J=8.2, 3.6 Hz, 2H). LCMS (ESI), m/z: 470 [M+H]⁺

Compounds 45-46 were synthesized as same as step 6-7 in Example 1 (yield: 63.3%).

¹H NMR (300 MHz, DMSO-d₆) δ 13.52 (s, 1H), 8.65-8.55 (m, 1H), 8.33 (s, 1H), 7.97 (d, J=16.4 Hz, 1H), 7.82 (td, J=7.6, 1.8 Hz, 1H), 7.74-7.44 (m, 4H), 7.33-7.21 (m, 1H), 6.94-6.73 (m, 3H), 5.27 (s, 2H). LCMS (ESI), m/z: 364.1 [M+H]⁺

Example 24: Preparation of (E)-3,5-difluoro-N-((3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-yl)methyl)aniline (designated as DYX-191)

Step 1: Synthesis of (E)-5-(((tert-butyldimethylsilyl)oxo)methyl)-3-(2-(pyridin-2-yl)vinyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (Compound 47)

Compound 47 was synthesized as same as step 6 in Example 1 (yield: 61.7%). ¹H NMR (400 MHz, DMSO-d₆) δ 8.61 (ddd, J=4.8, 1.8, 0.9 Hz, 1H), 8.12-8.04 (m, 1H), 7.93 (d, J=16.4 Hz, 1H), 7.82 (td, J=7.7, 1.8 Hz, 1H), 7.74 (dd, J=8.7, 0.7 Hz, 1H), 7.65 (dt, J=7.9, 1.1 Hz, 1H), 7.55 (d, J=16.4 Hz, 1H), 7.43 (dd, J=8.7, 1.4 Hz, 1H), 7.28 (ddd, J=7.5, 4.8, 1.1 Hz, 1H), 5.86 (dd, J=9.7, 2.5 Hz, 1H), 4.87 (s, 2H), 3.95-3.84 (m, 1H), 3.75 (dq, J=9.5, 6.0 Hz, 1H), 2.49-2.34 (m, 1H), 2.11-1.93 (m, 2H), 1.75 (qd, J=11.2, 3.5 Hz, 1H), 1.59 (h, J=4.7, 3.9 Hz, 2H). LCMS (ESI), m/z: 450.2 [M+H]⁺

Step 2: Synthesis of (E)-(3-(2-(pyridin-2-yl)vinyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-yl)methanol (Compound 48)

Compound 48 was synthesized as same as step 4 in Example 22 (yield: 83.6%). ¹H NMR (400 MHz, DMSO-d₆) δ 8.65-8.57 (m, 1H), 8.08 (s, 1H), 7.93 (d, J=16.4 Hz, 1H), 7.82 (td, J=7.6, 1.9 Hz, 1H), 7.73 (dd, J=8.3, 3.0 Hz, 2H), 7.57 (d, J=16.4 Hz, 1H), 7.45 (dd, J=8.6, 1.4 Hz, 1H), 7.29 (ddd, J=7.5, 4.8, 1.2 Hz, 1H), 5.88 (dd, J=9.7, 2.5 Hz, 1H), 5.27 (t, J=5.7 Hz, 1H), 4.66 (d, J=5.0 Hz, 2H), 3.97-3.84 (m, 1H), 3.84-3.65 (m, 1H), 2.47-2.36 (m, 1H), 2.03 (dddd, J=28.0, 12.7, 6.0, 3.5 Hz, 2H), 1.77 (dq, J=12.3, 9.0, 8.3 Hz, 1H), 1.60 (dq, J=8.0, 4.7, 3.8 Hz, 2H). LCMS (ESI), m/z: 336.1 [M+H]⁺

Step 3: Synthesis of (E)-3-(2-(pyridin-2-yl)vinyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole-5-aldehyde (Compound 49)

Compound 48 (1 g, 3 mmol) was dissolved in 10 mL of DCM. Dess-martin periodinane (DMP) (1.9 g, 4.5 mmol) was added, and the mixture was stirred at room temperature for 3 hours. After the reaction was completed, water was added for extraction, and the organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 740 mg of compound 49 (yield: 74%). ¹H NMR (400 MHz, DMSO-d₆) δ 10.13 (s, 1H), 8.89 (t, J=1.1 Hz, 1H), 8.64 (ddd, J=4.8, 1.7, 0.8 Hz, 1H), 8.03-7.93 (m, 3H), 7.85 (td, J=7.6, 1.8 Hz, 1H), 7.77-7.69 (m, 2H), 7.32 (ddd, J=7.5, 4.8, 1.2 Hz, 1H), 5.98 (dd, J=9.7, 2.4 Hz, 1H), 3.98-3.86 (m, 1H), 3.87-3.72 (m, 1H), 2.49-2.34 (m, 1H), 2.13-1.96 (m, 2H), 1.77 (tq, J=13.5, 7.0, 5.1 Hz, 1H), 1.61 (dq, J=7.6, 5.0, 3.6 Hz, 2H). LCMS (ESI), m/z: 334.1 [M+H]⁺

Step 4: Synthesis of (E)-3,5-difluoro-N-((3-(2-(pyridin-2-yl)vinyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-yl)methyl)aniline (Compound 50)

Compound 49 (700 mg, 2.1 mmol), 3,5-difluoroaniline (325 mg, 2.52 mmol), and sodium triacetoxyborohydride (890 mg, 4.2 mmol) were dissolved in 10 mL of anhydrous THF. 2 drops of acetic acid were added dropwise, and a reflux reaction was carried out for 2 hours. After the reaction was completed, THF was removed by evaporation, and water was added, followed by extraction with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 412 mg of compound 50 (yield: 43.9%). ¹H NMR (400 MHz, DMSO-d₆) δ 8.61 (dd, J=4.9, 1.7 Hz, 1H), 8.18 (s, 1H), 7.92 (d, J=16.4 Hz, 1H), 7.83 (td, J=7.7, 1.9 Hz, 1H), 7.71 (dd, J=28.4, 8.2 Hz, 2H), 7.57 (d, J=16.4 Hz, 1H), 7.48 (dd, J=8.7, 1.5 Hz, 1H), 7.29 (ddd, J=7.6, 4.8, 1.2 Hz, 1H), 6.95 (t, J=5.9 Hz, 1H), 6.36-6.13 (m, 3H), 5.87 (dd, J=9.7, 2.5 Hz, 1H), 4.43 (d, J=5.9 Hz, 2H), 3.90 (d, J=11.5 Hz, 1H), 3.79-3.69 (m, 1H), 2.48-2.31 (m, 1H), 2.12-1.92 (m, 2H), 1.75 (d, J=12.9 Hz, 1H), 1.60 (dp, J=8.5, 4.2 Hz, 2H). LCMS (ESI), m/z: 447.2 [M+H]⁺

Step 5: Synthesis of (E)-3,5-difluoro-N-((3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-yl)methyl)aniline (Compound 51)

Compound 51 was synthesized as same as step 7 in Example 1 (yield: 75.5%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.27 (s, 1H), 8.61 (dd, J=4.9, 1.7 Hz, 1H), 8.17 (s, 1H), 7.95 (d, J=16.4 Hz, 1H), 7.82 (td, J=7.7, 1.9 Hz, 1H), 7.65 (d, J=7.8 Hz, 1H), 7.60-7.48 (m, 2H), 7.42 (dd, J=8.6, 1.5 Hz, 1H), 7.27 (dd, J=7.4, 4.8 Hz, 1H), 6.93 (t, J=5.9 Hz, 1H), 6.36-6.26 (m, 2H), 6.20 (tt, J=9.6, 2.3 Hz, 1H), 4.42 (d, J=5.8 Hz, 2H).

LCMS (ESI), m/z: 363.1 [M+H]⁺

Example 25: Preparation of (E)-3,5-difluoro-N-methyl-N-((3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-yl)methyl)aniline (designated as DYX-193)

The synthesis of compound 52 from compound 50 was performed as same as step 1-2 in Example 21 (yield: 73.1%).

Compound 52: ¹H NMR (400 MHz, DMSO-d₆) δ 8.61 (ddd, J=4.8, 1.8, 0.8 Hz, 1H), 8.06-7.98 (m, 1H), 7.90 (d, J=16.3 Hz, 1H), 7.82 (td, J=7.7, 1.8 Hz, 1H), 7.73 (d, J=8.7 Hz, 1H), 7.65 (dt, J=8.0, 1.1 Hz, 1H), 7.52 (d, J=16.4 Hz, 1H), 7.34-7.25 (m, 2H), 6.51-6.42 (m, 2H), 6.32 (tt, J=9.3, 2.2 Hz, 1H), 5.86 (dd, J=9.7, 2.5 Hz, 1H), 4.75 (s, 2H), 3.89 (d, J=11.6 Hz, 1H), 3.82-3.68 (m, 1H), 3.07 (s, 3H), 2.48-2.36 (m, 1H), 2.10-1.94 (m, 2H), 1.75 (d, J=12.8 Hz, 1H), 1.59 (p, J=4.9, 4.3 Hz, 2H). LCMS (ESI), m/z: 461.2 [M+H]⁺

Compound 53: ¹H NMR (400 MHz, DMSO-d₆) δ 13.28 (s, 1H), 8.61 (dd, J=4.9, 1.7 Hz, 1H), 8.06-7.89 (m, 2H), 7.82 (td, J=7.7, 1.9 Hz, 1H), 7.63 (d, J=7.8 Hz, 1H), 7.57-7.45 (m, 2H), 7.32-7.19 (m, 2H), 6.54-6.41 (m, 2H), 6.33 (tt, J=9.3, 2.2 Hz, 1H), 4.75 (s, 2H), 3.07 (s, 3H).

LCMS (ESI), m/z: 377.1 [M+H]⁺

Example 26: Preparation of (E)-3,5-difluoro-N-(3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-yl)benzamide (designated as DYX-164)

Steps 1-3: Compound 54-56 were synthesized the same as step 4-6 in Example 1.

Step 4: Synthesis of (E)-3-(2-(pyridin-2-yl)vinyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-amine (Compound 57)

The synthesis of compound 57 from compound 56 was performed the same as step 2 in Example 17 (yield: 82.1%).

¹H NMR (400 MHz, DMSO-d₆) δ 8.59 (d, J=4.7 Hz, 1H), 7.89-7.70 (m, 2H), 7.64 (d, J=7.9 Hz, 1H), 7.53-7.31 (m, 2H), 7.31-7.07 (m, 2H), 6.88 (d, J=8.9 Hz, 1H), 5.73 (d, J=9.5 Hz, 1H), 5.06 (s, 2H), 3.89 (d, J=11.4 Hz, 1H), 3.72 (q, J=6.3 Hz, 1H), 2.38 (t, J=12.8 Hz, 1H), 1.99 (dd, J=35.4, 13.1 Hz, 2H), 1.72 (q, J=10.3, 9.7 Hz, 1H), 1.66-1.44 (m, 2H). LCMS (ESI), m/z: 321.2 [M+H]⁺

Step 5: Synthesis of (E)-3,5-difluoro-N-(3-(2-(pyridin-2-yl)vinyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-yl)benzamide (Compound 58)

Compound 57 (500 mg, 1.56 mmol) was dissolved in 10 mL of anhydrous DCM. Triethylamine (473 mg, 4.68 mmol) was added, and 3,5-difluorobenzoyl chloride (303 mg, 1.72 mmol) was added dropwise under stirring in an ice bath. After the addition was completed, a reaction was continued for 1 hour. After the reaction was completed, water was added, followed by extraction with DCM. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 620 mg of compound 58 (yield: 86.2%).

¹H NMR (400 MHz, DMSO-d₆) δ 10.54 (s, 1H), 8.61 (ddt, J=5.8, 2.5, 1.0 Hz, 2H), 7.92 (d, J=16.4 Hz, 1H), 7.86-7.67 (m, 6H), 7.61-7.46 (m, 2H), 7.30 (ddd, J=7.5, 4.8, 1.2 Hz, 1H), 5.89 (dd, J=9.8, 2.3 Hz, 1H), 3.98-3.86 (m, 1H), 3.77 (ddd, J=12.6, 9.0, 4.6 Hz, 1H), 2.43 (ddd, J=13.2, 9.6, 3.6 Hz, 1H), 2.11-1.96 (m, 2H), 1.76 (d, J=12.6 Hz, 1H), 1.61 (dq, J=8.0, 4.9, 3.8 Hz, 2H).

LCMS (ESI), m/z: 461.2 [M+H]⁺

Step 6: Synthesis of (E)-3,5-difluoro-N-(3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-yl)benzamide (Compound 59)

The synthesis of compound 59 from compound 58 was performed the same as step 7 in Example 1 (yield: 70.9%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.33 (s, 1H), 10.54 (s, 1H), 8.64-8.56 (m, 2H), 7.95 (d, J=16.4 Hz, 1H), 7.85-7.71 (m, 4H), 7.71-7.43 (m, 4H), 7.32-7.22 (m, 1H). LCMS (ESI), m/z: 377.1 [M+H]⁺

Example 27: Preparation of (E)-3,5-difluoro-N-(3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-yl)benzenesulfonamide (designated as DYX-165)

Step 1: Synthesis of (E)-3,5-difluoro-N-(3-(2-(pyridin-2-yl)vinyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-yl)benzenesulfonamide (Compound 60)

Compound 57 (500 mg, 1.56 mmol) was dissolved in 10 mL of pyridine. 3,5-difluorobenzenesulfonyl chloride (365 mg, 1.72 mmol) was slowly added, and the reaction was carried out overnight. After the reaction was completed, 20 mL of ethyl acetate was added. Extraction was performed twice with 1 M of hydrochloric acid, and the pyridine was washed off. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 653 mg of compound 60 (yield: 84.3%). ¹H NMR (400 MHz, DMSO-d₆) δ 10.48 (s, 1H), 8.67-8.58 (m, 1H), 7.89-7.80 (m, 2H), 7.79 (d, J=1.9 Hz, 1H), 7.71 (dd, J=8.5, 2.9 Hz, 2H), 7.61 (tt, J=9.1, 2.3 Hz, 1H), 7.47-7.36 (m, 3H), 7.31 (ddd, J=7.5, 4.8, 1.2 Hz, 1H), 7.18 (dd, J=9.0, 1.9 Hz, 1H), 5.83 (dd, J=9.8, 2.4 Hz, 1H), 3.93-3.83 (m, 1H), 3.72 (ddd, J=11.4, 8.1, 6.0 Hz, 1H), 2.47-2.31 (m, 1H), 2.08-1.92 (m, 2H), 1.72 (m, 1H), 1.58 (m, 2H). LCMS (ESI), m/z: 497.1 [M+H]⁺

Step 2: Synthesis of (E)-3,5-difluoro-N-(3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-yl)benzenesulfonamide (Compound 61)

The synthesis of compound 61 from compound 60 was performed as same as step 7 in Example 1 (yield: 67.9%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.36 (s, 1H), 10.38 (s, 1H), 8.61 (dd, J=4.8, 1.7 Hz, 1H), 7.92-7.75 (m, 3H), 7.66 (d, J=7.9 Hz, 1H), 7.60 (tt, J=9.1, 2.3 Hz, 1H), 7.50 (d, J=8.8 Hz, 1H), 7.45-7.32 (m, 3H), 7.28 (ddd, J=7.6, 4.7, 1.1 Hz, 1H), 7.12 (dd, J=8.9, 1.9 Hz, 1H).

LCMS (ESI), m/z: 413 [M+H]⁺

Example 28: Preparation of (E)-1-(3,5-difluorophenyl)-3-(3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-yl)urea (designated as DYX-174)

Step 1: Synthesis of (E)-1-(3,5-difluoro)-3-(3-(2-(pyridin-2-yl)vinyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-yl)urea (Compound 62)

Compound 57 (500 mg, 1.56 mmol) was dissolved in 10 mL of DCM. 3,5-difluorophenyl isocyanate (266 mg, 1.72 mmol) was added slowly dropwise, and the mixture was stirred for 1 hour to precipitate solid. Suction filtration was performed. The obtained filter residue was washed with DCM for three times, and dried to give 660 mg of compound 62 (yield 89.0%).

¹H NMR (400 MHz, DMSO-d₆) δ 9.18 (s, 1H), 9.01 (s, 1H), 8.62 (ddd, J=4.8, 1.8, 0.9 Hz, 1H), 8.30 (d, J=2.1 Hz, 1H), 7.90 (d, J=16.4 Hz, 1H), 7.82 (td, J=7.7, 1.9 Hz, 1H), 7.76-7.68 (m, 2H), 7.51-7.40 (m, 2H), 7.32-7.19 (m, 3H), 6.81 (tt, J=9.4, 2.4 Hz, 1H), 5.86 (dd, J=9.8, 2.4 Hz, 1H), 3.96-3.84 (m, 1H), 3.84-3.69 (m, 1H), 2.42 (ddd, J=13.0, 9.3, 3.5 Hz, 1H), 2.11-1.95 (m, 2H), 1.75 (d, J=12.9 Hz, 1H), 1.60 (hept, J=4.0 Hz, 2H). LCMS (ESI), m/z: 476.2 [M+1-1]⁺

Step 2: Synthesis of (E)-1-(3,5-difluoro)-3-(3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-yl)urea (Compound 63)

The synthesis of compound 63 from compound 62 was performed the same as step 7 in Example 1 (yield: 78.5%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.24 (s, 1H), 9.13 (s, 1H), 8.91 (s, 1H), 8.65-8.57 (m, 1H), 8.32-8.24 (m, 1H), 7.93 (d, J=16.3 Hz, 1H), 7.81 (td, J=7.7, 1.9 Hz, 1H), 7.67 (d, J=7.8 Hz, 1H), 7.53 (d, J=8.9 Hz, 1H), 7.49-7.33 (m, 2H), 7.25 (ddd, J=14.9, 8.8, 3.6 Hz, 3H), 6.79 (tt, J=9.5, 2.4 Hz, 1H).

LCMS (ESI), m/z: 392.1 [M+H]⁺

Example 29: Preparation of (E)-N-(3,5-difluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-185)

Step 1: Preparation of (E)-N-(3,5-difluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-amine (Compound 64)

Compound 57 (500 mg, 1.56 mmol) and 3,5-difluorobenzaldehyde (244 mg, 1.72 mmol) were dissolved in 10 mL of methanol, and 2 drops of acetic acid were added dropwise. The reaction was carried out at room temperature for 15 minutes to precipitate solid, and suction filtration was performed. The solid was dissolved in 10 mL of THF, and sodium triacetoxyborohydride (661 mg, 3.12 mmol) was added. The mixture was stirred at room temperature for 2 hours. After the reaction was completed, THF was removed by rotary evaporation, and water was added, followed by extraction with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 435 mg compound 64 (yield: 62.5%).

¹H NMR (400 MHz, DMSO-d₆) δ 8.59 (ddd, J=4.8, 1.9, 0.9 Hz, 1H), 7.86-7.76 (m, 2H), 7.58 (dt, J=7.9, 1.1 Hz, 1H), 7.53 (d, J=8.9 Hz, 1H), 7.33-7.14 (m, 4H), 7.07 (tt, J=9.4, 2.4 Hz, 1H), 7.00-6.92 (m, 2H), 6.43 (t, J=6.3 Hz, 1H), 5.74 (dd, J=9.7, 2.5 Hz, 1H), 4.44 (d, J=6.2 Hz, 2H), 3.88 (d, J=11.8 Hz, 1H), 3.78-3.64 (m, 1H), 2.45-2.27 (m, 1H), 2.07-1.87 (m, 2H), 1.72 (dd, J=13.2, 7.1 Hz, 1H), 1.58 (h, J=4.1 Hz, 2H). LCMS (ESI), m/z: 447.2 [M+H]⁺

Step 2: Preparation of (E)-N-(3,5-difluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (Compound 65)

The synthesis of compound 65 from compound 64 was performed the same as step 7 in Example 1 (yield: 67.3%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.95 (s, 1H), 8.60-8.54 (m, 1H), 7.88-7.75 (m, 2H), 7.54 (d, J=8.0 Hz, 1H), 7.36-7.30 (m, 1H), 7.29-7.16 (m, 4H), 7.08 (tt, J=9.3, 2.4 Hz, 1H), 6.97-6.90 (m, 2H), 6.36 (t, J=6.2 Hz, 1H), 4.43 (d, J=6.1 Hz, 2H).

LCMS (ESI), m/z: 363.1 [M+H]⁺

Example 30: Preparation of (E)-N-(3,5-difluorobenzyl)-N-methyl-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-187)

Step 1: Synthesis of (E)-N-(3,5-difluorobenzyl)-N-methyl-3-(2-(pyridin-2-yl)vinyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-amine (Compound 66)

The synthesis of compound 66 from compound 57 was performed the same as step 1 in Example 21 (yield: 70.5%).

Compound 66: ¹H NMR (400 MHz, DMSO-d₆) δ 8.59 (ddd, J=4.8, 1.9, 0.9 Hz, 1H), 7.90 (d, J=16.2 Hz, 1H), 7.80 (td, J=7.6, 1.9 Hz, 1H), 7.65 (dt, J=8.0, 1.1 Hz, 1H), 7.60 (dd, J=9.0, 0.7 Hz, 1H), 7.40 (d, J=16.3 Hz, 1H), 7.26 (ddd, J=7.4, 4.8, 1.1 Hz, 1H), 7.18-7.05 (m, 3H), 6.98 (qd, J=6.3, 3.2 Hz, 2H), 5.79 (dd, J=9.7, 2.5 Hz, 1H), 4.68 (s, 2H), 3.88 (d, J=11.3 Hz, 1H), 3.79-3.65 (m, 1H), 3.10 (s, 3H), 2.40 (tdd, J=12.9, 9.8, 3.9 Hz, 1H), 2.09-1.88 (m, 2H), 1.81-1.64 (m, 1H), 1.58 (tq, J=7.4, 3.8 Hz, 2H). LCMS (ESI), m/z: 461.2 [M+H]⁺

Step 2: Synthesis of (E)-N-(3,5-difluorobenzyl)-N-methyl-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (Compound 67)

The synthesis of compound 67 from compound 66 was performed the same as step 7 in Example 1 (yield: 76.2%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.04 (s, 1H), 8.62-8.48 (m, 1H), 7.93 (d, J=16.3 Hz, 1H), 7.80 (td, J=7.7, 1.9 Hz, 1H), 7.63 (d, J=7.9 Hz, 1H), 7.48-7.32 (m, 2H), 7.25 (ddd, J=7.5, 4.8, 1.1 Hz, 1H), 7.18 (d, J=2.2 Hz, 1H), 7.10 (ddd, J=12.0, 8.5, 2.3 Hz, 2H), 7.00 (qd, J=6.4, 3.1 Hz, 2H), 4.66 (s, 2H), 3.09 (s, 3H).

LCMS (ESI), m/z: 377.2 [M+H]⁺

Example 31: Preparation of (E)-N-(3,5-difluorophenyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole-5-carboxamide (designated as DYX-171)

The synthesis methods in steps 1-3 were the same as those in the step 4-6 in Example 1.

Step 4: Synthesis of (E)-3-(2-(pyridin-2-yl)vinyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole-5-carboxylic acid (Compound 71)

Compound 70 (2 g, 5.5 mmol) and NaOH (440 mg, 11 mol) were dissolved in a mixed solvent of 15 mL of ethanol and 5 mL of water, and the reaction was carried out at 70° C. for 3 hours. After the reaction was completed, the ethanol in the solvent was removed by evaporation. The pH was adjusted to be acidic with 1M of hydrochloric acid while solid was precipitated. Suction filtration, water washing and drying were performed to give 1.57 g of Compound 71 (yield: 81.8%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.02 (s, 1H), 8.74 (s, 1H), 8.62 (d, J=4.7 Hz, 1H), 8.06-7.95 (m, 2H), 7.89-7.78 (m, 3H), 7.60 (d, J=16.4 Hz, 1H), 7.31 (dt, J=8.2, 3.7 Hz, 1H), 5.99-5.90 (m, 1H), 3.92 (d, J=11.6 Hz, 1H), 3.78 (q, J=11.7, 8.9 Hz, 1H), 2.48-2.33 (m, 1H), 2.14-1.95 (m, 2H), 1.78 (tt, J=16.0, 6.2 Hz, 1H), 1.61 (tt, J=8.1, 4.0 Hz, 2H). LCMS (ESI), m/z: 350.1 [M+1-1]⁺

Step 5: (E)-N-(3,5-difluorophenyl)-3-(2-(pyridin-2-yl)vinyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole-5-amide

Compound 71 (1 g, 2.9 mmol), HATU (1.64 g, 4.3 mmol), and DIEA (1.12 g, 8.7 mmol) were dissolved in 10 mL of DMF, the mixture was stirred at room temperature for 10 min; and then 3,5-difluoroaniline (561 mg, 4.3 mmol) was added, and the obtained mixture was heated to 60° C. for reaction overnight. After the reaction was completed, an appropriate amount of water was added, followed by extraction with ethyl acetate three times. The organic layer was washed four times with water and once with saturated brine, dried over anhydrous sodium sulfate, filtered by suction and evaporated to dryness, and column chromatography was performed to give 776 mg of Compound 72 (yield: 58.9%). ¹H NMR (400 MHz, DMSO-d₆) δ 10.71 (s, 1H), 8.82 (s, 1H), 8.64 (dd, J=4.9, 1.7 Hz, 1H), 8.12-7.96 (m, 2H), 7.91 (d, J=8.9 Hz, 1H), 7.85 (td, J=7.6, 1.9 Hz, 1H), 7.77-7.66 (m, 2H), 7.66-7.56 (m, 2H), 7.32 (dd, J=7.4, 4.8 Hz, 1H), 6.98 (tt, J=9.3, 2.5 Hz, 1H), 5.97 (dd, J=9.5, 2.3 Hz, 1H), 3.99-3.87 (m, 1H), 3.88-3.71 (m, 1H), 2.48-2.40 (m, 1H), 2.15-2.00 (m, 2H), 1.78 (td, J=14.8, 12.6, 7.2 Hz, 1H), 1.62 (qd, J=8.2, 5.1, 4.0 Hz, 2H). LCMS (ESI), m/z: 460.2 [M+H]⁺

Step 6: Preparation of (E)-N-(3,5-difluorophenyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole-5-amide (Compound 73)

The synthetic method of Compound 73 was the same as step 7 in Example 1 (yield: 66.4%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.62 (s, 1H), 10.71 (s, 1H), 8.83 (s, 1H), 8.63 (dd, J=4.8, 1.7 Hz, 1H), 8.10-7.94 (m, 2H), 7.85 (td, J=7.7, 1.9 Hz, 1H), 7.74-7.66 (m, 3H), 7.65-7.56 (m, 2H), 7.31 (dd, J=7.5, 4.8 Hz, 1H), 6.99 (tt, J=9.3, 2.4 Hz, 1H).

LCMS (ESI), m/z: 377 [M+H]⁺

Example 32: Preparation of (E)-5-((3,5-difluorophenyl)ethynyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-183)

Step 1: Synthesis of 5-((3,5-difluorophenyl)ethynyl)-1H-indazole (Compound 74)

5-Iodo-1H-indazole (1 g, 4.1 mmol), bis(triphenylphosphine)palladium dichloride (288 mg, 0.41 mmol), and cuprous iodide (78 mg, 0.41 mmol) were added to a two-necked flask with argon replacement for three times. Then 1-ethynyl-3,5-difluorobenzene (1.14 g, 8.2 mmol), DIEA (1.59 g, 12.3 mmol) and 15 mL DMF were sequentially added with a syringe, and the reaction was carried out overnight at 40° C. After the reaction was completed, water was added thereto, followed by three times extraction with ethyl acetate. The organic layer was washed four times with water and once with saturated brine, dried over anhydrous sodium sulfate, filtered by suction and evaporated to dryness, and column chromatography was performed to give 822 mg of Compound 74 (yield: 78.9%). ¹H NMR (400 MHz, DMSO-d₆) δ 13.35 (s, 1H), 8.15 (d, J=1.3 Hz, 1H), 8.09-8.03 (m, 1H), 7.61 (dt, J=8.6, 1.0 Hz, 1H), 7.50 (dd, J=8.6, 1.5 Hz, 1H), 7.35 (td, J=7.4, 2.9 Hz, 3H). LCMS (ESI), m/z: 255 [M+H]⁺

The remaining synthesis procedures were the same as those of Compounds 4 to 7 in Example 1 (yield: 79.2%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.54 (s, 1H), 8.61 (dd, J=5.0, 1.8 Hz, 1H), 8.50 (s, 1H), 7.98 (d, J=16.4 Hz, 1H), 7.82 (td, J=7.6, 1.8 Hz, 1H), 7.76-7.70 (m, 1H), 7.67-7.54 (m, 3H), 7.40-7.31 (m, 3H), 7.29 (ddd, J=7.4, 4.7, 1.2 Hz, 1H).

LCMS (ESI), m/z: 358.1 [M+H]⁺

Example 33: Preparation of (E)-5-(3,5-difluorophenethyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-180)

Step 1: Synthesis of 5-(3,5-difluorophenethyl)-1H-indazole (Compound 79)

Compound 74 (500 mg, 1.97 mmol) was dissolved in a mixed solvent of 5 mL of ethanol and 5 mL of DMF, then Pd/C was added. H2 replacement was performed for five times, and a reaction was carried out overnight at 60° C. After the reaction was completed, suction filtration was carried out, and the obtained filter residue was washed with ethanol for three times. The obtained filtrate was removed by evaporation to give 468 mg of compound 79 (yield: 92.1%). ¹H NMR (400 MHz, DMSO-d₆) δ 12.98 (s, 1H), 7.98 (s, 1H), 7.54 (s, 1H), 7.45 (d, J=8.5 Hz, 1H), 7.24 (dd, J=8.5, 1.6 Hz, 1H), 7.01 (dp, J=12.1, 5.5, 4.0 Hz, 3H), 3.03-2.88 (m, 4H). LCMS

(ESI), m/z: 334.1 [M+H]⁺

The remaining synthesis procedures were the same as those of compound 4-7 in Example 1 (yield: 81.5%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.22 (s, 1H), 8.60 (dt, J=4.8, 1.3 Hz, 1H), 8.03-7.91 (m, 2H), 7.82 (td, J=7.7, 1.9 Hz, 1H), 7.67 (dt, J=7.9, 1.1 Hz, 1H), 7.57-7.45 (m, 2H), 7.35-7.24 (m, 2H), 7.10-6.98 (m, 3H), 3.14-2.88 (m, 4H). LCMS (ESI), m/z: 362.1 [M+H]⁺

Example 34: Preparation of (E)-5-(3,5-difluorophenyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-119)

Step 1: Synthesis of 5-iodo-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (Compound 84)

Compound 84 was synthesized the same as step 1 in Example 1 (yield: 82.2%).

Step 2: Synthesis of 5-(3,5-difluorophenyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (Compound 85)

Compound 84 (2 g, 6.1 mmol), 3,5-difluorophenylboronic acid (1.44 g, 9.1 mmol), and sodium carbonate (1.29 g, 12.2 mmol) were added to a mixed solvent of 30 mL of 1,4-dioxane and 6 mL of water with argon replacement for three times. Tetrakis(triphenylphosphine)palladium (693 mg, 0.6 mmol) was added. Argon replacement was performed for three times, and a reaction was carried out at 80° C. overnight. After the reaction was completed, 1,4-dioxane was removed by evaporation, and ethyl acetate and water were added for extraction. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 1.17 g of compound 85 (yield: 61.1%).

¹H NMR (400 MHz, DMSO-d₆) δ 8.20-8.14 (m, 2H), 7.85-7.78 (m, 2H), 7.53-7.45 (m, 2H), 7.20 (tt, J=9.3, 2.3 Hz, 1H), 5.90 (dd, J=9.7, 2.5 Hz, 1H), 3.89 (dtd, J=11.2, 3.8, 1.6 Hz, 1H), 3.76 (ddd, J=11.4, 8.0, 5.8 Hz, 1H), 2.47-2.35 (m, 1H), 2.07-1.95 (m, 2H), 1.83-1.69 (m, 1H), 1.59 (tq, J=8.2, 3.8 Hz, 2H).

LCMS (ESI), m/z: 315.1 [M+H]⁺

The remaining steps were the same as steps 3-7 in Example 1 (yield: 70.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.43 (s, 1H), 8.61 (dd, J=4.8, 1.7 Hz, 1H), 8.57-8.48 (m, 1H), 8.05 (d, J=16.3 Hz, 1H), 7.88-7.76 (m, 2H), 7.76-7.55 (m, 5H), 7.34-7.16 (m, 2H). LCMS (ESI), m/z: 334.1 [M+H]⁺

Example 35: Preparation of (E)-5-((3,5-difluorophenyl)sulfonyl)-3-(2-(pyridin-2-yl)vinyl)-1H-pyrazolo[3,4-c]pyridine (designated as DYX-149)

The synthesis method in Example 35 was referred to those in Example 17 and 19 (yield: 62.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 14.46 (s, 1H), 9.17 (s, 1H), 9.08 (s, 1H), 8.64 (dd, J=4.8, 1.6 Hz, 1H), 8.08 (d, J=16.4 Hz, 1H), 7.89-7.65 (m, 6H), 7.38-7.30 (m, 1H).

LCMS (ESI), m/z: 399.0 [M+H]⁺

Example 36: Preparation of (E)-5-((3,5-difluorophenyl)sulfonyl)-3-(2-(pyridin-2-yl)vinyl)-1H-pyrazolo[4,3-b]pyridine (designated as DYX-150)

The synthesis method in Example 36 was referred to those in Example 17 and 19 (yield: 75.1%).

¹H NMR (400 MHz, DMSO-d₆) δ 14.02 (s, 1H), 8.65 (dd, J=4.9, 1.7 Hz, 1H), 8.38 (d, J=8.8 Hz, 1H), 8.24 (d, J=8.8 Hz, 1H), 7.99-7.72 (m, 6H), 7.59 (d, J=7.8 Hz, 1H), 7.33 (ddd, J=7.6, 4.7, 1.1 Hz, 1H).

LCMS (ESI), m/z: 399.0 [M+H]⁺

Example 37: Preparation of 5-benzyl-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-014)

Compound 4 (200 mg, 0.6 mmol), bis(triphenylphosphine)palladium dichloride (21 mg, 0.03 mmol), and cuprous iodide (12 mg, 0.06 mmol) were added to a two-necked flask. Argon replacement was performed for three times. 2-ethynylpyridine (123 mg, 1.2 mmol), DIEA (232 mg, 1.8 mmol) and 10 mL of DMF were added sequentially with a syringe, and a reaction was carried out overnight at 40° C. After the reaction was completed, an appropriate amount of water was added, followed by extraction with ethyl acetate for three times. The organic layer was washed with water for four times, washed once with saturated brine, dried over anhydrous sodium sulfate, filtered by suction, and evaporated to dryness. Column chromatography was performed to give 101 mg of compound 101 (yield 54.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.60 (s, 1H), 8.66 (ddd, J=4.9, 1.8, 1.0 Hz, 1H), 7.90 (td, J=7.7, 1.8 Hz, 1H), 7.77 (dt, J=7.8, 1.1 Hz, 1H), 7.73-7.69 (m, 1H), 7.56 (dd, J=8.6, 0.8 Hz, 1H), 7.46 (ddd, J=7.7, 4.9, 1.2 Hz, 1H), 7.33 (dd, J=8.7, 1.6 Hz, 1H), 7.29 (d, J=4.9 Hz, 4H), 7.23-7.14 (m, 1H), 4.11 (s, 2H).

LCMS (ESI), m/z: 310.1 [M+H]⁺

Example 38: Preparation of 5-(2-fluorobenzyl)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-021)

The synthesis was performed as same as Example 37 (yield: 54.5%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.61 (s, 1H), 8.65 (ddd, J=4.9, 1.8, 1.0 Hz, 1H), 7.90 (td, J=7.7, 1.8 Hz, 1H), 7.75 (dt, J=7.8, 1.1 Hz, 1H), 7.68 (s, 1H), 7.60-7.55 (m, 1H), 7.46 (ddd, J=7.6, 4.9, 1.2 Hz, 1H), 7.38-7.23 (m, 3H), 7.20-7.11 (m, 2H), 4.13 (s, 2H).

LCMS (ESI), m/z: 328 [M+H]⁺

Example 39: Preparation of 5-(3-fluorobenzyl)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-025)

The synthesis was performed the same as Example 37 (yield: 47.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.61 (s, 1H), 8.65 (ddd, J=4.9, 1.8, 1.0 Hz, 1H), 7.90 (td, J=7.7, 1.8 Hz, 1H), 7.80-7.72 (m, 2H), 7.57 (dd, J=8.5, 0.8 Hz, 1H), 7.45 (ddd, J=7.6, 4.8, 1.2 Hz, 1H), 7.38-7.27 (m, 2H), 7.18-7.07 (m, 2H), 7.06-6.95 (m, 1H), 4.12 (s, 2H).

LCMS (ESI), m/z: 328 [M+H]⁺

Example 40: Preparation of 5-(4-fluorobenzyl)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-027)

The synthesis was performed the same as Example 37 (yield: 50.7%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.59 (s, 1H), 8.65 (ddd, J=4.9, 1.8, 0.9 Hz, 1H), 7.90 (td, J=7.7, 1.8 Hz, 1H), 7.78-7.69 (m, 2H), 7.56 (dd, J=8.6, 0.8 Hz, 1H), 7.46 (ddd, J=7.6, 4.9, 1.2 Hz, 1H), 7.38-7.26 (m, 3H), 7.15-7.02 (m, 2H), 4.09 (s, 2H).

LCMS (ESI), m/z: 328[M+H]⁺

Example 41: Preparation of 5-(2,5-difluorobenzyl)-3-(pyridin-2-ylethynyl)-1H-indazole (designated DYX-041)

The synthesis was performed the same as Example 37 (yield: 53.1%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.63 (s, 1H), 8.70-8.62 (m, 1H), 7.90 (td, J=7.7, 1.9 Hz, 1H), 7.79-7.69 (m, 2H), 7.58 (d, J=8.6 Hz, 1H), 7.46 (tt, J=5.5, 2.7 Hz, 1H), 7.34 (dd, J=8.6, 1.5 Hz, 1H), 7.23 (tdd, J=9.3, 5.0, 3.3 Hz, 2H), 7.11 (td, J=8.3, 4.4 Hz, 1H), 4.12 (s, 2H).

LCMS (ESI), m/z: 346.1 [M+H]⁺

Example 42: Preparation of 5-(2,3-difluorobenzyl)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-074)

The synthesis was performed the same as Example 37 (yield: 54.5%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.63 (s, 1H), 8.66 (dt, J=4.7, 1.5 Hz, 1H), 7.90 (td, J=7.8, 1.9 Hz, 1H), 7.78-7.69 (m, 2H), 7.59 (d, J=8.6 Hz, 1H), 7.46 (ddd, J=7.7, 4.8, 1.2 Hz, 1H), 7.37-7.21 (m, 2H), 7.21-7.10 (m, 2H), 4.19 (s, 2H).

LCMS (ESI), m/z: 346.1 [M+H]⁺

Example 43: Preparation of 5-(3,5-difluorobenzyl)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as CCB-484)

The synthesis was performed the same as Example 37 (yield: 52.2%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.60 (s, 1H), 8.66 (ddd, J=4.8, 1.7, 0.9 Hz, 1H), 7.90 (td, J=7.7, 1.8 Hz, 1H), 7.80-7.73 (m, 2H), 7.61-7.54 (m, 1H), 7.46 (ddd, J=7.6, 4.9, 1.2 Hz, 1H), 7.36 (dd, J=8.6, 1.5 Hz, 1H), 7.08-6.98 (m, 3H).

LCMS (ESI), m/z: 346 [M+H]⁺

Example 44: Preparation of 5-(3,4-difluorobenzyl)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-044)

The synthesis was performed the same as Example 37 (yield: 49.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.60 (s, 1H), 8.70-8.60 (m, 1H), 7.89 (td, J=7.7, 1.8 Hz, 1H), 7.80-7.70 (m, 2H), 7.57 (d, J=8.6 Hz, 1H), 7.45 (ddd, J=7.6, 4.9, 1.3 Hz, 1H), 7.40-7.27 (m, 3H), 7.13 (ddd, J=8.6, 4.4, 1.9 Hz, 1H), 4.09 (s, 2H).

LCMS (ESI), m/z: 346.1 [M+H]⁺

Example 45: Preparation of 5-(2,4-difluorobenzyl)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-051)

The synthesis was performed the same as Example 37 (yield: 50.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.63 (s, 1H), 8.66 (d, J=4.8 Hz, 1H), 7.90 (t, J=7.8 Hz, 1H), 7.84-7.64 (m, 2H), 7.58 (d, J=8.6 Hz, 1H), 7.52-7.14 (m, 4H), 7.05 (d, J=8.7 Hz, 1H), 4.11 (s, 2H).

LCMS (ESI), m/z: 346 [M+H]⁺

Example 46: Preparation of 5-(2,6-difluorobenzyl)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-071)

The synthesis was performed the same as Example 37 (yield: 62.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.64 (s, 1H), 8.66 (dt, J=4.6, 1.5 Hz, 1H), 7.90 (td, J=7.7, 1.8 Hz, 1H), 7.78-7.71 (m, 1H), 7.63 (s, 1H), 7.58 (d, J=8.6 Hz, 1H), 7.46 (ddd, J=7.6, 4.9, 1.2 Hz, 1H), 7.40-7.27 (m, 2H), 7.13 (t, J=7.8 Hz, 2H), 4.14 (s, 2H).

LCMS (ESI), m/z: 346 [M+H]⁺

Example 47: Preparation of 3-(pyridin-2-ylethynyl)-5-(3,4,5-trifluorobenzyl)-1H-indazole (designated as DYX-075)

The synthesis was performed the same as Example 37 (yield: 53.1%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.63 (s, 1H), 8.66 (d, J=4.6 Hz, 1H), 7.91 (td, J=7.7, 1.8 Hz, 1H), 7.81-7.73 (m, 2H), 7.58 (dd, J=8.6, 0.8 Hz, 1H), 7.46 (ddd, J=7.6, 4.9, 1.2 Hz, 1H), 7.36 (dd, J=8.6, 1.6 Hz, 1H), 7.33-7.24 (m, 2H), 4.09 (s, 2H).

LCMS (ESI), m/z: 364.1 [M+H]⁺

Example 48: Preparation of 5-(3,5-difluorophenoxy)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-092)

The synthesis was performed the same as Example 37 (yield: 47.7%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.82 (s, 1H), 8.66 (s, 1H), 7.88 (t, J=7.7 Hz, 1H), 7.77 (dd, J=22.3, 8.4 Hz, 2H), 7.59 (d, J=2.2 Hz, 1H), 7.50-7.40 (m, 1H), 7.29 (dd, J=9.0, 2.1 Hz, 1H), 6.98 (tt, J=9.3, 2.3 Hz, 1H), 6.77-6.66 (m, 2H).

LCMS (ESI), m/z: 348.1 [M+H]⁺

Example 49: Preparation of 5-((3,5-difluorophenyl)thio)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-086)

The synthesis was performed the same as Example 37 (yield: 40.4%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.96 (s, 1H), 8.65 (d, J=4.8 Hz, 1H), 8.14 (s, 1H), 7.94-7.73 (m, 3H), 7.60-7.52 (m, 1H), 7.46 (dd, J=7.5, 4.9 Hz, 1H), 7.06 (tt, J=9.2, 2.4 Hz, 1H), 6.85-6.74 (m, 2H).

LCMS (ESI), m/z: 364 [M+H]⁺

Example 50: Preparation of 5-((3,5-difluorophenyl)sulfonyl)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-108)

The synthesis was performed the same as Example 37 (yield: 44.2%).

¹H NMR (400 MHz, DMSO-d₆) δ 14.20 (s, 1H), 8.69 (d, J=4.9 Hz, 1H), 8.60 (s, 1H), 8.02 (d, J=8.9 Hz, 1H), 7.97-7.80 (m, 5H), 7.63 (q, J=11.3, 10.1 Hz, 1H), 7.50 (dd, J=7.6, 5.0 Hz, 1H).

LCMS (ESI), m/z: 396 [M+H]⁺

Example 51: Preparation of N-(3,5-difluorophenyl)-3-(pyridin-2-ylethynyl)-1H-indazol-5-amine (designated as DYX-129)

The synthesis was performed the same as Example 37 (yield: 43.7%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.63 (s, 1H), 8.74 (s, 1H), 8.64 (d, J=4.8 Hz, 1H), 7.88 (td, J=7.8, 1.8 Hz, 1H), 7.69 (dd, J=36.6, 8.3 Hz, 2H), 7.54-7.38 (m, 2H), 7.37-7.26 (m, 1H), 6.66-6.40 (m, 3H).

LCMS (ESI), m/z: 347.1 [M+H]⁺

Example 52: Preparation of N-(3,5-difluorophenyl)-N-methyl-3-(pyridin-2-ylethynyl)-1H-indazol-5-amine (designated as DYX-130)

The synthesis was performed the same as Example 37 (yield: 45.8%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.78 (s, 1H), 8.63 (ddd, J=4.8, 1.8, 1.0 Hz, 1H), 7.88 (td, J=7.7, 1.8 Hz, 1H), 7.78 (dt, J=7.8, 1.2 Hz, 1H), 7.75-7.66 (m, 2H), 7.44 (ddd, J=7.6, 4.9, 1.3 Hz, 1H), 7.32 (dd, J=8.8, 2.0 Hz, 1H), 6.45 (tt, J=9.3, 2.3 Hz, 1H), 6.32-6.19 (m, 2H), 3.32 (s, 3H).

LCMS (ESI), m/z: 361.1 [M+H]⁺

Example 53: Preparation of 5-(3,5-difluorophenyl)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-115)

The synthesis was performed the same as Example 37 (yield: 42.9%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.78 (s, 1H), 8.66 (d, J=5.0 Hz, 1H), 8.16 (s, 1H), 7.95-7.68 (m, 4H), 7.60-7.41 (m, 3H), 7.21 (t, J=9.3 Hz, 1H).

LCMS (ESI), m/z: 332 [M+H]⁺

Example 54: Preparation of 5-((3,5-difluorobenzyl)oxo)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-131)

The synthesis was performed the same as Example 37 (yield: 50.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.62 (s, 1H), 8.65 (dt, J=4.8, 1.6 Hz, 1H), 7.90 (td, J=7.7, 1.8 Hz, 1H), 7.77 (dt, J=7.8, 1.2 Hz, 1H), 7.59 (d, J=9.0 Hz, 1H), 7.45 (ddd, J=7.7, 4.8, 1.2 Hz, 1H), 7.31-7.17 (m, 5H), 5.25 (s, 2H).

LCMS (ESI), m/z: 362.1 [M+H]⁺

Example 55: Preparation of 5-(3-chlorobenzyl)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-134Q)

The synthesis was performed the same as Example 37 (yield: 40.3%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.62 (s, 1H), 8.66 (dt, J=4.9, 1.3 Hz, 1H), 7.90 (td, J=7.7, 1.9 Hz, 1H), 7.76 (d, J=7.7 Hz, 2H), 7.57 (d, J=8.6 Hz, 1H), 7.46 (ddd, J=7.6, 4.9, 1.2 Hz, 1H), 7.39-7.19 (m, 5H), 4.11 (s, 2H).

LCMS (ESI), m/z: 344 [M+H]⁺

Example 56: Preparation of 3-(pyridin-2-ylethynyl)-5-(3-(trifluoromethylbenzyl)-1H-indazole (designated as DYX-138Q)

The synthesis was performed the same as Example 37 (yield: 45.8%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.64 (s, 1H), 8.66 (d, J=4.9 Hz, 1H), 7.96-7.85 (m, 1H), 7.83-7.72 (m, 2H), 7.71-7.43 (m, 6H), 7.36 (d, J=8.6 Hz, 1H), 4.22 (s, 2H).

LCMS (ESI), m/z: 378.1 [M+H]⁺

Example 57: Preparation of 5-(3-methoxybenzyl)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-135Q)

The synthesis was performed the same as Example 37 (yield: 47.3%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.60 (s, 1H), 8.65 (ddd, J=4.9, 1.8, 1.0 Hz, 1H), 7.90 (td, J=7.7, 1.8 Hz, 1H), 7.76 (dt, J=7.9, 1.2 Hz, 1H), 7.71 (s, 1H), 7.55 (d, J=8.6 Hz, 1H), 7.45 (ddd, J=7.7, 4.9, 1.2 Hz, 1H), 7.33 (dd, J=8.6, 1.5 Hz, 1H), 7.19 (t, J=7.8 Hz, 1H), 6.88-6.80 (m, 2H), 6.75 (ddd, J=8.2, 2.6, 1.0 Hz, 1H), 4.06 (s, 2H), 3.70 (s, 3H).

LCMS (ESI), m/z: 339.1 [M+H]⁺

Example 58: Preparation of 3-((3-(pyridin-2-ylethynyl)-1H-indazol-5-yl)methyl)benzonitrile (designated DYX-136Q)

The synthesis was performed the same as Example 37 (yield: 44.5%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.63 (s, 1H), 8.66 (d, J=4.8 Hz, 1H), 7.90 (t, J=7.7 Hz, 1H), 7.85-7.40 (m, 8H), 7.35 (d, J=8.6 Hz, 1H), 4.17 (s, 2H).

LCMS (ESI), m/z: 335 [M+H]⁺

Example 59: Preparation of 5-(3-methylbenzyl)-3-(pyridin-2-ylethynyl)-1H-indazole (designated as DYX-137Q)

The synthesis was performed the same as Example 37 (yield: 43.2%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.58 (s, 1H), 8.65 (d, J=4.8 Hz, 1H), 7.89 (td, J=7.7, 1.8 Hz, 1H), 7.75 (d, J=7.8 Hz, 1H), 7.69 (s, 1H), 7.55 (d, J=8.5 Hz, 1H), 7.45 (dd, J=7.6, 4.9 Hz, 1H), 7.31 (d, J=8.3 Hz, 1H), 7.16 (t, J=7.4 Hz, 1H), 7.06 (d, J=8.4 Hz, 2H), 6.98 (d, J=7.5 Hz, 1H), 4.05 (s, 2H), 2.24 (s, 3H).

LCMS (ESI), m/z: 324 [M+H]⁺

Example 60: Preparation of (E)-5-(3,5-difluorobenzyl)-3-(2-(pyridin-3-yl)vinyl)-1H-indazole (designated as DYX-03)

The synthesis was performed the same as Example 1 (yield: 67.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.19 (s, 1H), 8.89 (d, J=2.2 Hz, 1H), 8.48 (dd, J=4.7, 1.6 Hz, 1H), 8.22-8.11 (m, 2H), 7.68 (d, J=16.8 Hz, 1H), 7.58-7.39 (m, 3H), 7.29 (dd, J=8.6, 1.5 Hz, 1H), 7.03 (td, J=7.2, 6.8, 3.0 Hz, 3H), 4.12 (s, 2H).

LCMS (ESI), m/z: 348.1 [M+H]⁺

Example 61: Preparation of (E)-5-(3,5-difluorobenzyl)-3-(2-(pyridin-4-yl)vinyl)-1H-indazole (designated as DYX-215)

The synthesis was performed the same as Example 1 (yield: 65.9%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.62 (s, 1H), 8.85-8.74 (m, 2H), 8.27-8.13 (m, 4H), 7.68 (d, J=16.6 Hz, 1H), 7.57 (d, J=8.6 Hz, 1H), 7.35 (dd, J=8.6, 1.5 Hz, 1H), 7.09-7.00 (m, 3H), 4.15 (s, 2H).

LCMS (ESI), m/z: 348.1 [M+H]⁺

Example 62: Preparation of (E)-5-(3,5-difluorobenzyl)-3-styryl-1H-indazole (designated as DYX-07)

The synthesis was performed the same as Example 1 (yield: 70.2%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.11 (s, 1H), 8.13 (s, 1H), 7.74-7.68 (m, 2H), 7.54-7.44 (m, 3H), 7.41 (t, J=7.6 Hz, 2H), 7.32-7.25 (m, 2H), 7.08-6.99 (m, 3H), 4.12 (s, 2H).

LCMS (ESI), m/z: 347.1 [M+H]⁺

Example 63: Preparation of (E)-5-(3,5-difluorobenzyl)-3-(2-fluorostyryl)-1H-indazole (designated as DYX-10)

The synthesis was performed the same as Example 1 (yield: 71.1%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.20 (s, 1H), 8.00 (s, 1H), 7.91 (td, J=7.7, 1.8 Hz, 1H), 7.66-7.47 (m, 3H), 7.38-7.22 (m, 4H), 7.04 (dddd, J=9.4, 5.8, 4.3, 2.4 Hz, 3H), 4.13 (s, 2H).

LCMS (ESI), m/z: 365.1 [M+H]⁺

Example 64: Preparation of (E)-5-(3,5-difluorobenzyl)-3-(2-(pyrazin-2-yl)vinyl)-1H-indazole (designated as DYX-05)

The synthesis was performed the same as Example 1 (yield: 73.1%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.35 (s, 1H), 8.92 (d, J=1.5 Hz, 1H), 8.65 (dd, J=2.5, 1.5 Hz, 1H), 8.51 (d, J=2.5 Hz, 1H), 8.17 (s, 1H), 8.06 (d, J=16.4 Hz, 1H), 7.63 (d, J=16.4 Hz, 1H), 7.52 (d, J=8.5 Hz, 1H), 7.32 (dd, J=8.6, 1.4 Hz, 1H), 7.11-6.97 (m, 3H), 4.13 (s, 2H).

LCMS (ESI), m/z: 349.1 [M+H]⁺

Example 65: Preparation of (E)-2-(2-(5-(3,5-difluorobenzyl)-1H-indazol-3-yl)vinyl)quinoline (designated as DYX-06)

The synthesis was performed the same as Example 1 (yield: 54.7%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.35 (s, 1H), 8.38 (d, J=8.6 Hz, 1H), 8.21 (s, 1H), 8.13 (d, J=16.6 Hz, 1H), 8.06-7.92 (m, 3H), 7.80-7.69 (m, 2H), 7.61-7.50 (m, 2H), 7.32 (dd, J=8.6, 1.5 Hz, 1H), 7.11-6.99 (m, 3H), 4.16 (s, 2H).

LCMS (ESI), m/z: 398.1 [M+H]⁺

Example 66: Preparation of (E)-5-(3,5-difluorobenzyl)-3-(2-(6-methylpyridin-2-yl)vinyl)-1H-indazole (designated as DYX-09)

The synthesis was performed the same as Example 1 (yield: 77.8%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.23 (s, 1H), 8.13 (s, 1H), 7.92 (d, J=16.4 Hz, 1H), 7.70 (t, J=7.7 Hz, 1H), 7.57-7.42 (m, 3H), 7.30 (dd, J=8.6, 1.4 Hz, 1H), 7.14 (d, J=7.6 Hz, 1H), 7.10-6.96 (m, 3H), 4.14 (s, 2H), 2.53 (s, 3H).

LCMS (ESI), m/z: 362.1 [M+H]⁺

Example 67: Preparation of (E)-5-(3,5-difluorobenzyl)-3-(2-(thiophen-2-yl)vinyl)-1H-indazole (designated as DYX-04)

The synthesis was performed the same as Example 1 (yield: 49.9%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.12 (s, 1H), 8.10 (s, 1H), 7.68 (d, J=16.5 Hz, 1H), 7.52-7.44 (m, 2H), 7.33 (d, J=3.5 Hz, 1H), 7.27 (dd, J=8.6, 1.4 Hz, 1H), 7.21 (d, J=16.5 Hz, 1H), 7.10 (dd, J=5.1, 3.5 Hz, 1H), 7.07-7.00 (m, 3H), 4.11 (s, 2H).

LCMS (ESI), m/z: 353.0 [M+H]⁺

Example 68: Preparation of (E)-5-((3,5-difluorophenyl)sulfonyl)-3-(2-(pyridin-4-yl)vinyl)-1H-indazole (designated as E01F02)

The synthesis was performed the same as Example 1 (yield: 70.2%).

¹H NMR (400 MHz, DMSO-d₆) δ 8.97 (d, J=1.6 Hz, 1H), 8.63-8.57 (m, 2H), 8.04-7.93 (m, 2H), 7.84-7.72 (m, 5H), 7.65 (tt, J=9.2, 2.4 Hz, 1H), 7.56 (d, J=16.5 Hz, 1H).

LCMS (ESI), m/z: 398.1 [M+H]⁺

Example 69: Preparation of (E)-5-((3,5-difluorophenyl)sulfonyl)-3-styryl-1H-indazole (designated as E01F07)

The synthesis was performed the same as Example 1 (yield: 73.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.70 (s, 1H), 8.93 (d, J=1.6 Hz, 1H), 7.93 (dd, J=8.9, 1.7 Hz, 1H), 7.85-7.69 (m, 6H), 7.65 (dd, J=9.2, 2.5 Hz, 1H), 7.62 (s, 1H), 7.44 (t, J=7.5 Hz, 2H), 7.33 (t, J=7.3 Hz, 1H).

LCMS (ESI), m/z: 397.1 [M+H]⁺

Example 70: Preparation of (E)-5-(3,5-difluorobenzyl)-3-(2-methylstyryl)-1H-indazole (designated as D01F08)

The synthesis was performed the same as Example 1 (yield: 73.1%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.10 (s, 1H), 7.95 (s, 1H), 7.80-7.73 (m, 1H), 7.61 (d, J=16.5 Hz, 1H), 7.49 (d, J=8.5 Hz, 1H), 7.39 (d, J=16.6 Hz, 1H), 7.31 (dd, J=8.6, 1.4 Hz, 1H), 7.28-7.17 (m, 3H), 7.10-7.00 (m, 3H), 4.12 (s, 2H), 2.42 (s, 3H).

LCMS (ESI), m/z: 361.1 [M+H]⁺

Example 71: Preparation of (E)-5-(3-chloro-5-fluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as D02F01)

The synthesis was performed the same as Example 1 (yield: 65.8%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.24 (s, 1H), 8.61 (dd, J=5.0, 1.7 Hz, 1H), 8.14 (s, 1H), 7.95 (d, J=16.4 Hz, 1H), 7.82 (td, J=7.6, 1.8 Hz, 1H), 7.67 (d, J=7.8 Hz, 1H), 7.60-7.48 (m, 2H), 7.34-7.16 (m, 5H), 4.13 (s, 2H).

LCMS (ESI), m/z: 364.1 [M+H]⁺

Example 72: Preparation of (E)-5-(3-fluoro-5-methoxybenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as D05F01)

The synthesis was performed the same as Example 1 (yield: 60.9%).

LCMS (ESI),m/z: 360.1 [M+H]⁺

Example 73: Preparation of (E)-5-(3,5-dichlorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as D06F01)

The synthesis was performed the same as Example 1 (yield: 72.0%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.25 (s, 1H), 8.62-8.58 (m, 1H), 8.15 (s, 1H), 7.95 (d, J=16.4 Hz, 1H), 7.82 (td, J=7.7, 1.9 Hz, 1H), 7.66 (d, J=7.8 Hz, 1H), 7.60-7.48 (m, 2H), 7.40 (dd, J=7.1, 1.9 Hz, 3H), 7.32-7.25 (m, 2H), 4.12 (s, 2H).

LCMS (ESI), m/z: 380.0 [M+H]⁺

Example 74: Preparation of (E)-5-(3,5-dimethylbenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as D07F01)

The synthesis was performed the same as Example 1 (yield: 66.3%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.20 (s, 1H), 8.65-8.57 (m, 1H), 8.05 (s, 1H), 7.95 (d, J=16.3 Hz, 1H), 7.81 (td, J=7.7, 1.8 Hz, 1H), 7.68 (d, J=7.8 Hz, 1H), 7.59-7.43 (m, 2H), 7.31-7.20 (m, 2H), 6.84 (d, J=33.1 Hz, 3H), 4.02 (s, 2H), 2.21 (s, 6H).

LCMS (ESI), m/z: 340.2 [M+H]⁺

Example 75: Preparation of (E)-5-(5-fluoro-2-methoxybenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as D09F01)

The synthesis was performed the same as Example 1 (yield: 67.4%).

LCMS (ESI), m/z: 360.1 [M+H]⁺

Example 76: Preparation of (E)-N-(2,5-difluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-216A1

The synthesis was performed the same as Example 29 (yield: 74.8%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.94 (s, 1H), 8.63-8.53 (m, 1H), 7.93-7.75 (m, 2H), 7.56 (d, J=7.9 Hz, 1H), 7.41-7.20 (m, 5H), 7.13 (tt, J=8.0, 3.5 Hz, 1H), 7.05-6.89 (m, 2H), 6.21 (t, J=6.4 Hz, 1H), 4.42 (d, J=5.0 Hz, 2H).

LCMS (ESI), m/z: 363.1 [M+H]⁺

Example 77: Preparation of (R,E)-5-(2-(2,5-difluorophenyl)pyrrolidin-1-yl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazole (designated as DYX-170)

The synthesis was performed the same as Example 20 (yield: 66.2%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.96 (s, 1H), 8.59 (ddd, J=4.8, 1.8, 0.9 Hz, 1H), 7.89 (d, J=16.3 Hz, 1H), 7.80 (td, J=7.7, 1.9 Hz, 1H), 7.54 (d, J=7.8 Hz, 1H), 7.41-7.29 (m, 2H), 7.28-7.19 (m, 2H), 7.17-7.08 (m, 1H), 6.97-6.88 (m, 2H), 6.72 (dd, J=9.1, 2.1 Hz, 1H), 5.12-4.97 (m, 1H), 3.88 (td, J=8.3, 7.6, 2.9 Hz, 1H), 3.44 (td, J=8.8, 6.9 Hz, 1H), 2.49-2.41 (m, 1H), 2.11-1.98 (m, 2H), 1.95-1.85 (m, 1H).

LCMS (ESI), m/z: 403.1 [M+H]⁺

Example 78: Preparation of (E)-3-(5-((3,5-difluorobenzyl)amino)-1H-indazol-3-yl)acrylamide (designated as DYX-223)

The specific steps of this synthetic route were the same as those in Example 26 and Example 29 (yield: 60.9%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.07 (s, 1H), 7.63-7.50 (m, 2H), 7.35 (d, J=8.9 Hz, 1H), 7.17 (qd, J=6.2, 3.1 Hz, 2H), 7.07 (qd, J=6.9, 6.1, 2.5 Hz, 2H), 6.93 (dd, J=8.9, 2.1 Hz, 1H), 6.82 (s, 1H), 6.72 (d, J=16.0 Hz, 1H), 6.33 (s, 1H), 4.39 (s, 2H).

LCMS (ESI), m/z: 329.1 [M+H]⁺

Example 79: Preparation of (E)-3-(5-((3,5-difluorobenzyl)amino)-1H-indazol-3-yl)-N,N-dimethylacrylamide (designated as DYX-220)

The synthesis was performed the same as Example 78 (yield: 56.7%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.12 (s, 1H), 7.63 (d, J=15.6 Hz, 1H), 7.36 (d, J=8.9 Hz, 1H), 7.12 (h, J=4.0 Hz, 2H), 7.05 (tt, J=9.3, 2.4 Hz, 1H), 6.98-6.89 (m, 2H), 6.69 (s, 1H), 6.46 (t, J=6.1 Hz, 1H), 4.42 (d, J=4.7 Hz, 2H), 3.09 (s, 3H), 2.95 (s, 3H).

LCMS (ESI), m/z: 357.1 [M+H]⁺

Example 80: Preparation of (E)-3-(5-((3,5-difluorobenzyl)amino)-1H-indazol-3-yl)-1-morpholinoprop-2-en-1-one (designated as DYX-222)

The synthesis was performed the same as Example 78 (yield: 63.4%). ¹H NMR (400 MHz, DMSO-d₆) δ 13.16 (s, 1H), 7.71 (d, J=15.6 Hz, 1H), 7.37 (d, J=8.9 Hz, 1H), 7.16-7.03 (m, 3H), 7.00-6.92 (m, 2H), 6.73 (s, 1H), 6.45 (s, 1H), 4.43 (s, 2H), 3.71-3.53 (m, 8H).

LCMS (ESI), m/z: 399.2 [M+H]⁺

Example 81: Preparation of (R,E)-3-(5-((3,5-difluorobenzyl)amino)-1H-indazol-3-yl)-1-(3-hydroxylpyrrolidin-1-yl)prop-2-en-1-one (designated as DYX-227)

The synthesis was performed the same as Example 78 (yield: 64.4%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.13 (s, 1H), 7.63 (dd, J=15.7, 3.2 Hz, 1H), 7.37 (d, J=8.9 Hz, 1H), 7.17-7.02 (m, 3H), 6.96 (ddd, J=9.0, 4.9, 2.0 Hz, 1H), 6.77-6.63 (m, 2H), 6.46 (dt, J=17.2, 5.5 Hz, 1H), 5.00 (dd, J=23.2, 3.5 Hz, 1H), 4.46-4.26 (m, 3H), 3.58 (dtt, J=16.6, 8.4, 4.9 Hz, 2H), 3.48-3.38 (m, 2H), 2.08-1.76 (m, 2H).

LCMS (ESI), m/z: 399.1 [M+H]⁺

Example 82: Preparation of (S,E)-3-(5-((3,5-difluorobenzyl)amino)-1H-indazol-3-yl)-1-(3-hydroxylpyrrolidin-1-yl)prop-2-en-1-one (designated as DYX-228)

The synthesis was performed the same as Example 78 (yield: 61.7%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.14 (s, 1H), 7.64 (dd, J=15.7, 3.5 Hz, 1H), 7.37 (dd, J=8.9, 1.9 Hz, 1H), 7.17-7.01 (m, 3H), 6.96 (ddd, J=9.1, 4.9, 2.1 Hz, 1H), 6.77-6.63 (m, 2H), 6.46 (dt, J=17.2, 6.1 Hz, 1H), 5.00 (dd, J=23.0, 3.4 Hz, 1H), 4.48-4.25 (m, 3H), 3.58 (tdt, J=15.4, 11.1, 6.4 Hz, 2H), 3.42 (d, J=12.5 Hz, 2H), 2.07-1.76 (m, 2H).

LCMS (ESI), m/z: 399.1 [M+H]⁺

Example 83: Preparation of (E)-3-(5-((3,5-difluorobenzyl)amino)-1H-indazol-3-yl)-1-(4-methylpiperazin-1-yl)prop-2-en-1-one (designated as DYX-226)

The synthesis was performed the same as Example 78 (yield: 59.8%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.16 (s, 1H), 7.67 (d, J=15.4 Hz, 1H), 7.36 (d, J=8.8 Hz, 1H), 7.24-6.80 (m, 5H), 6.59 (d, J=102.2 Hz, 2H), 4.43 (s, 2H), 3.59 (s, 4H), 2.31 (d, J=53.1 Hz, 7H).

LCMS (ESI), m/z: 412.2 [M+H]⁺

Example 84: Preparation of (E)-3-(5-((3,5-difluorobenzyl)amino)-1H-indazol-3-yl)-N-isopropylacrylamide (designated as DYX-231)

The synthesis was performed the same as Example 78 (yield: 63.9%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.04 (s, 1H), 7.93 (d, J=7.7 Hz, 1H), 7.55 (d, J=15.9 Hz, 1H), 7.34 (d, J=8.8 Hz, 1H), 7.19 (qd, J=6.2, 3.1 Hz, 2H), 7.07 (tt, J=9.3, 2.4 Hz, 1H), 6.93 (dd, J=8.9, 2.0 Hz, 1H), 6.82 (s, 1H), 6.72 (d, J=16.0 Hz, 1H), 6.31 (s, 1H), 4.39 (s, 2H), 4.07-3.90 (m, 1H), 1.14 (d, J=6.6 Hz, 6H).

LCMS (ESI), m/z: 412.2 [M+H]⁺

Example 85: Preparation of (E)-N-tert-butyl-3-(5-((3,5-difluorobenzyl)amino)-1H-indazol-3-yl)acrylamide (designated as DYX-230)

The synthesis was performed the same as Example 78 (yield: 67.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.01 (s, 1H), 7.66 (s, 1H), 7.49 (d, J=15.9 Hz, 1H), 7.33 (d, J=8.8 Hz, 1H), 7.23-7.15 (m, 2H), 7.07 (tt, J=9.3, 2.4 Hz, 1H), 6.92 (dd, J=8.9, 2.0 Hz, 1H), 6.85-6.72 (m, 2H), 6.30 (t, J=6.2 Hz, 1H), 4.39 (d, J=6.0 Hz, 2H), 1.35 (s, 9H).

LCMS (ESI), m/z: 385.2 [M+H]⁺

Example 86: Preparation of (E)-3-(5-((3,5-difluorobenzyl)amino)-1H-indazol-3-yl)-N-methylacrylamide (designated as DYX-235)

The synthesis was performed the same as Example 78 (yield: 69.0%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.06 (s, 1H), 8.06 (q, J=4.6 Hz, 1H), 7.56 (d, J=15.9 Hz, 1H), 7.34 (d, J=8.9 Hz, 1H), 7.17 (qd, J=6.2, 3.1 Hz, 2H), 7.07 (tt, J=9.3, 2.4 Hz, 1H), 6.94 (dd, J=8.9, 2.0 Hz, 1H), 6.85-6.79 (m, 1H), 6.73 (d, J=16.0 Hz, 1H), 6.31 (s, 1H), 4.39 (s, 2H), 2.74 (d, J=4.6 Hz, 3H).

LCMS (ESI), m/z: 343.1 [M+H]⁺

Example 87: Preparation of (E)-3-(5-((3,5-difluorobenzyl)amino)-1H-indazol-3-yl)-N-ethylacrylamide (designated as DYX-236)

The synthesis was performed the same as Example 78 (yield: 64.1%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.05 (s, 1H), 8.09 (t, J=5.6 Hz, 1H), 7.56 (d, J=15.9 Hz, 1H), 7.34 (d, J=8.9 Hz, 1H), 7.18 (tq, J=6.2, 4.1, 3.1 Hz, 2H), 7.07 (tt, J=9.3, 2.4 Hz, 1H), 6.93 (dd, J=8.9, 2.1 Hz, 1H), 6.82 (s, 1H), 6.72 (d, J=16.0 Hz, 1H), 6.31 (s, 1H), 4.46-4.33 (m, 2H), 3.23 (qd, J=7.2, 5.4 Hz, 2H), 1.10 (t, J=7.2 Hz, 3H).

LCMS (ESI), m/z: 357.2 [M+H]⁺

Example 88: Preparation of (R,E)-N-(1-(3,5-difluorophenyl)ethyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated DYX-244-1)

The synthesis was performed the same as Example 20 (yield: 72.4%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.90 (s, 1H), 8.58 (dd, J=4.9, 1.8 Hz, 1H), 7.86-7.75 (m, 2H), 7.51 (d, J=7.8 Hz, 1H), 7.27 (dd, J=23.9, 8.2 Hz, 4H), 7.16 (d, J=16.3 Hz, 1H), 7.01 (tt, J=9.3, 2.4 Hz, 1H), 6.92 (dd, J=8.9, 2.0 Hz, 1H), 6.87-6.79 (m, 1H), 6.23 (d, J=7.1 Hz, 1H), 4.70 (p, J=6.7 Hz, 1H), 1.47 (d, J=6.6 Hz, 3H). LCMS (ESI), m/z: 377.1 [M+H]⁺

Example 89: Preparation of (S,E)-N-(1-(3,5-difluorophenyl)ethyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated DYX-244-2)

The synthesis was performed the same as Example 20 (yield: 71.0%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.92 (s, 1H), 8.58 (d, J=4.7 Hz, 1H), 7.87-7.76 (m, 2H), 7.50 (d, J=7.9 Hz, 1H), 7.28 (dd, J=26.2, 8.1 Hz, 4H), 7.15 (d, J=16.3 Hz, 1H), 7.05-6.96 (m, 1H), 6.92 (d, J=8.9 Hz, 1H), 6.82 (s, 1H), 6.23 (d, J=7.1 Hz, 1H), 4.70 (p, J=6.9 Hz, 1H), 1.47 (d, J=6.7 Hz, 3H). LCMS (ESI), m/z: 377.1 [M+H]⁺

Example 90: Preparation of (E)-3-(5-(((R)-1-(3,5-difluorophenyl)ethyl)amino)-1H-indazol-3-yl)-1-((S)-3-hydroxylpyrrolidin-1-yl)prop-2-en-1-one (designated as DYX-303)

The synthesis was performed the same as Example 20 (yield: 66.0%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.15 (s, 1H), 7.62 (dd, J=15.7, 2.2 Hz, 1H), 7.35 (dd, J=9.0, 2.1 Hz, 1H), 7.16 (h, J=4.0 Hz, 2H), 6.99 (m, 2H), 6.72-6.54 (m, 2H), 6.36 (s, 1H), 4.72-4.63 (m, 1H), 4.37 (m, 1H), 3.82 (td, J=9.0, 3.0 Hz, 1H), 3.65-3.45 (m, 4H), 2.11-1.77 (m, 2H), 1.45 (dd, J=6.8, 3.8 Hz, 3H). LCMS (ESI), m/z: 413.2 [M+H]⁺

Example 91: Preparation of (E)-N-(3-fluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-305)

The synthesis was performed the same as Example 29 (yield: 73.9%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.93 (s, 1H), 8.58 (dd, J=4.9, 1.7 Hz, 1H), 7.86 (d, J=16.3 Hz, 1H), 7.78 (td, J=7.7, 1.9 Hz, 1H), 7.55 (d, J=7.9 Hz, 1H), 7.42-7.26 (m, 5H), 7.25-7.21 (m, 1H), 7.04 (ddd, J=10.0, 6.0, 2.3 Hz, 1H), 6.96 (dt, J=7.0, 2.0 Hz, 2H), 6.28 (d, J=6.0 Hz, 1H), 4.42 (d, J=4.6 Hz, 2H).

LCMS (ESI), m/z: 345.1 [M+H]⁺

Example 92: Preparation of (E)-N-(3-fluoro-5-chlorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-400)

The synthesis was performed the same as Example 29 (yield: 72.9%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.93 (s, 1H), 8.58 (dd, J=5.0, 1.7 Hz, 1H), 7.85 (d, J=16.3 Hz, 1H), 7.79 (td, J=7.7, 1.9 Hz, 1H), 7.55 (d, J=7.8 Hz, 1H), 7.42 (d, J=1.6 Hz, 1H), 7.37-7.21 (m, 5H), 6.94 (dd, J=6.9, 2.5 Hz, 2H), 6.34 (t, J=6.1 Hz, 1H), 4.43 (d, J=4.7 Hz, 2H).

LCMS (ESI), m/z: 379.1 [M+H]⁺

Example 93: Preparation of (E)-N-(3-fluoro-5-methylbenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-401)

The synthesis was performed the same as Example 29 (yield: 68.3%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.91 (s, 1H), 8.57 (d, J=4.7 Hz, 1H), 7.89-7.75 (m, 2H), 7.55 (d, J=7.9 Hz, 1H), 7.36-7.20 (m, 3H), 7.18-7.04 (m, 2H), 6.91 (dd, J=26.2, 8.9 Hz, 3H), 6.24 (s, 1H), 4.35 (s, 2H), 2.30 (s, 3H).

LCMS (ESI), m/z: 359.1 [M+H]⁺

Example 94: Preparation of (E)-3-fluoro-5-(((3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-yl)amino)methyl)benzonitrile (designated as DYX-402)

The synthesis was performed the same as Example 29 (yield: 74.0%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.94 (s, 1H), 8.61-8.55 (m, 1H), 7.85 (d, J=16.4 Hz, 2H), 7.78 (td, J=7.7, 1.9 Hz, 1H), 7.70 (tdd, J=10.0, 2.6, 1.3 Hz, 2H), 7.56 (d, J=7.8 Hz, 1H), 7.35 (d, J=8.8 Hz, 1H), 7.28-7.20 (m, 2H), 6.97-6.90 (m, 2H), 6.36 (t, J=6.2 Hz, 1H), 4.48 (d, J=5.7 Hz, 2H).

LCMS (ESI), m/z: 370.2 [M+H]⁺

Example 95: Preparation of (E)-N-(3-fluoro-5-methoxybenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-403)

The synthesis was performed the same as Example 29 (yield: 69.0%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.92 (s, 1H), 8.58 (dd, J=4.8, 1.7 Hz, 1H), 7.89-7.75 (m, 2H), 7.54 (d, J=7.8 Hz, 1H), 7.33 (d, J=8.9 Hz, 1H), 7.27-7.20 (m, 2H), 6.97-6.90 (m, 3H), 6.90-6.84 (m, 1H), 6.67 (dt, J=11.0, 2.3 Hz, 1H), 6.28 (s, 1H), 4.36 (s, 2H), 3.75 (s, 3H).

LCMS (ESI), m/z: 375.1 [M+H]⁺

Example 96: Preparation of (R,E)-N-(1-(3,5-difluorophenyl)ethyl)-3-(2-(pyridin-3-yl)vinyl)-1H-indazol-5-amine (designated as DYX-409)

The synthesis was performed the same as Example 20 (yield: 70.0%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.86 (s, 1H), 8.77 (d, J=2.2 Hz, 1H), 8.45 (dd, J=4.6, 1.6 Hz, 1H), 8.07 (dt, J=8.2, 2.0 Hz, 1H), 7.52 (d, J=16.8 Hz, 1H), 7.40 (dd, J=8.0, 4.7 Hz, 1H), 7.33-7.22 (m, 3H), 7.08 (d, J=16.8 Hz, 1H), 7.00 (tt, J=9.3, 2.4 Hz, 1H), 6.93 (dd, J=8.9, 2.0 Hz, 1H), 6.83 (d, J=2.0 Hz, 1H), 6.22 (d, J=7.1 Hz, 1H), 4.69 (p, J=6.7 Hz, 1H), 1.47 (d, J=6.7 Hz, 3H).

LCMS (ESI), m/z: 377.1 [M+H]⁺

Example 97: Preparation of (R,E)-N-(1-(3,5-difluorophenyl)ethyl)-3-(2-(pyridin-4-yl)vinyl)-1H-indazol-5-amine (designated as DYX-410)

The synthesis was performed the same as Example 20 (yield: 71.4%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.98 (s, 1H), 8.55 (d, J=5.0 Hz, 2H), 7.67 (d, J=16.7 Hz, 1H), 7.57 (d, J=5.1 Hz, 2H), 7.35-7.21 (m, 3H), 7.07-6.97 (m, 2H), 6.94 (dd, J=8.9, 2.0 Hz, 1H), 6.83 (s, 1H), 6.26 (d, J=6.9 Hz, 1H), 4.70 (p, J=6.8 Hz, 1H), 1.47 (d, J=6.6 Hz, 3H).

LCMS (ESI), m/z: 377.1 [M+H]⁺

Example 98: Preparation of (R,E)-N-(1-(3,5-difluorophenyl)ethyl)-3-(2-(pyrazin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-411)

The synthesis was performed the same as Example 20 (yield: 75.0%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.85 (s, 1H), 8.79 (s, 1H), 8.67-8.59 (m, 1H), 8.47 (d, J=2.5 Hz, 1H), 7.92 (d, J=16.3 Hz, 1H), 7.38-7.16 (m, 4H), 7.05-6.89 (m, 2H), 6.84 (s, 1H), 6.28 (d, J=7.2 Hz, 1H), 4.71 (p, J=6.8 Hz, 1H), 1.47 (d, J=6.7 Hz, 3H).

LCMS (ESI), m/z: 378.1 [M+H]⁺

Example 99: Preparation of (R,E)-N-(1-(3,5-difluorophenyl)ethyl)-3-styryl-1H-indazol-5-amine (designated as DYX-412)

The synthesis was performed the same as Example 20 (yield: 67.5%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.78 (s, 1H), 7.62-7.56 (m, 2H), 7.42-7.35 (m, 3H), 7.31-7.23 (m, 4H), 7.09-6.99 (m, 2H), 6.93 (dd, J=8.9, 2.0 Hz, 1H), 6.80 (d, J=2.0 Hz, 1H), 6.21 (s, 1H), 4.67 (q, J=6.9 Hz, 1H), 1.47 (d, J=6.7 Hz, 3H).

LCMS (ESI), m/z: 376.1 [M+H]⁺

Example 100: Preparation of (E)-N-(2-fluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-413)

The synthesis was performed the same as Example 29 (yield: 70.4%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.92 (s, 1H), 8.58 (dd, J=4.8, 1.7 Hz, 1H), 7.90-7.76 (m, 2H), 7.59-7.48 (m, 2H), 7.35-7.21 (m, 5H), 7.17 (qd, J=7.4, 6.7, 1.3 Hz, 1H), 7.03-6.91 (m, 2H), 6.16 (s, 1H), 4.41 (d, J=3.3 Hz, 2H).

LCMS (ESI), m/z: 345.1 [M+H]⁺

Example 101: Preparation of (E)-N-(3-fluoro-5-(trifluoromethyl)benzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-414)

The synthesis was performed the same as Example 29 (yield: 70.0%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.95 (s, 1H), 8.57 (dd, J=4.8, 1.7 Hz, 1H), 7.86 (d, J=16.3 Hz, 1H), 7.79 (td, J=7.7, 1.8 Hz, 1H), 7.74 (s, 1H), 7.68-7.61 (m, 1H), 7.58-7.49 (m, 2H), 7.35 (d, J=9.2 Hz, 1H), 7.30-7.21 (m, 2H), 6.95 (d, J=7.3 Hz, 2H), 6.39 (s, 1H), 4.52 (s, 2H).

LCMS (ESI), m/z: 413.1 [M+H]⁺

Example 102: Preparation of (E)-N-(3-bromo-5-fluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-415)

The synthesis was performed the same as Example 29 (yield: 67.3%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.94 (s, 1H), 8.58 (dd, J=4.8, 1.7 Hz, 1H), 7.91-7.76 (m, 2H), 7.57 (d, J=6.4 Hz, 2H), 7.37 (ddd, J=16.6, 9.1, 2.4 Hz, 3H), 7.30-7.20 (m, 2H), 6.94 (dd, J=6.9, 2.7 Hz, 2H), 6.35 (s, 1H), 4.43 (s, 2H).

LCMS (ESI), m/z: 423.0 [M+H]⁺

Example 103: Preparation of (E)-N-(2-chloro-5-fluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-416)

The synthesis was performed the same as Example 29 (yield: 62.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.96 (s, 1H), 8.58 (dd, J=4.9, 1.7 Hz, 1H), 7.89-7.76 (m, 2H), 7.58-7.50 (m, 2H), 7.40-7.30 (m, 2H), 7.29-7.21 (m, 2H), 7.15 (td, J=8.4, 3.2 Hz, 1H), 6.99-6.87 (m, 2H), 6.34 (s, 1H), 4.46 (s, 2H).

LCMS (ESI), m/z: 379.1 [M+H]⁺

Example 104: Preparation of (E)-N-(4-fluorobenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-417)

The synthesis was performed the same as Example 29 (yield: 65.9%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.91 (s, 1H), 8.58 (dd, J=4.9, 1.7 Hz, 1H), 7.86 (d, J=16.3 Hz, 1H), 7.79 (td, J=7.7, 1.8 Hz, 1H), 7.56 (d, J=7.8 Hz, 1H), 7.54-7.47 (m, 2H), 7.32 (d, J=8.8 Hz, 1H), 7.29-7.21 (m, 2H), 7.20-7.13 (m, 2H), 6.95 (d, J=8.6 Hz, 2H), 6.20 (s, 1H), 4.36 (s, 2H).

LCMS (ESI), m/z: 345.1 [M+H]⁺

Example 105: Preparation of (E)-N-(5-fluoro-2-methoxybenzyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-418)

The synthesis was performed the same as Example 29 (yield: 67.4%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.94 (s, 1H), 8.57 (dd, J=4.9, 1.7 Hz, 1H), 7.85 (d, J=16.4 Hz, 1H), 7.78 (td, J=7.7, 1.9 Hz, 1H), 7.57 (d, J=7.8 Hz, 1H), 7.35 (d, J=8.9 Hz, 1H), 7.30-7.20 (m, 2H), 7.16 (dt, J=9.4, 1.8 Hz, 1H), 7.02 (dd, J=6.4, 1.8 Hz, 2H), 6.94 (d, J=8.5 Hz, 2H), 6.13 (s, 1H), 4.34 (s, 2H), 3.88 (s, 3H).

LCMS (ESI), m/z: 375.1 [M+H]⁺

Example 106: Preparation of (E)-N-((5-fluoropyridin-3-yl)methyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-419)

The synthesis was performed the same as Example 29 (yield: 64.1%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.96 (s, 1H), 8.63-8.54 (m, 2H), 8.45 (d, J=2.8 Hz, 1H), 7.88 (d, J=16.3 Hz, 1H), 7.83-7.75 (m, 2H), 7.59 (d, J=7.8 Hz, 1H), 7.36 (d, J=8.9 Hz, 1H), 7.32-7.21 (m, 2H), 7.03-6.92 (m, 2H), 6.31 (s, 1H), 4.48 (s, 2H).

LCMS (ESI), m/z: 346.1 [M+H]⁺

Example 107: Preparation of (R,E)-N-(1-(3-fluorophenyl)ethyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-320)

The synthesis was performed the same as Example 29 (yield: 52.1%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.88 (s, 1H), 8.58 (dd, J=4.8, 2.3 Hz, 1H), 7.86-7.74 (m, 2H), 7.51 (d, J=7.8 Hz, 1H), 7.38-7.21 (m, 5H), 7.13 (d, J=16.3 Hz, 1H), 7.03-6.90 (m, 2H), 6.83 (s, 1H), 6.20 (d, J=7.0 Hz, 1H), 4.65 (t, J=6.6 Hz, 1H), 1.47 (d, J=6.7 Hz, 3H).

Example 108: Preparation of (R,E)-N-(1-(5-fluoropyridin-3-yl)ethyl)-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine

Example 109: Preparation of (R,E)-N-(1-(3,5-difluorophenyl)ethyl)-3-(2-(pyridin-2-yl)vinyl)-1H-pyrazolo[3,4-b]pyridin-5-amine (designated as DYX-318)

The synthesis was performed the same as Example 20 (yield: 60.6%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.43 (s, 1H), 8.59 (dd, J=4.8, 1.8 Hz, 1H), 8.18 (d, J=2.5 Hz, 1H), 7.85-7.75 (m, 2H), 7.54 (d, J=7.8 Hz, 1H), 7.34-7.20 (m, 5H), 7.02 (tt, J=9.3, 2.4 Hz, 1H), 6.51 (d, J=7.5 Hz, 1H), 4.76 (p, J=6.8 Hz, 1H), 1.49 (d, J=6.6 Hz, 3H).

Example 110: Preparation of (R,E)-N-(1-(3,5-difluorophenyl)ethyl)-3-(2-(3-methylpyridin-2-yl)vinyl)-1H-indazol-5-amine

Example 111: Preparation of (E)-5-(3,5-difluorobenzyl)-3-(2-(trifluoromethyestyryl)-1H-indazole (designated as D01F11)

The synthesis was performed the same as Example 1 (yield: 70.3%).

LCMS (ESI), m/z: 415.1 [M+H]⁺

Example 112: Preparation of (E)-5-((3,5-difluorophenyl)sulfonyl)-3-(2-methylstyryl)-1H-indazole (designated as E01F08)

The synthesis was performed the same as Example 1 (yield: 65.6%) LCMS (ESI), m/z: 411.1 [M+H]⁺

Example 113: Preparation of (E)-5-((3,5-difluorophenyl)sulfonyl)-3-(2-fluorostyryl)-1H-indazole (designated as E01F10)

The synthesis was performed the same as Example 1 (yield: 63.2%).

LCMS (ESI), m/z: 415.0 [M+H]

Example 114: Preparation of (R,E)-2-(4-(2-(5-((1-(3,5-difluorophenyl)ethyl)amino)-1H-indazol-3-yl)vinyl)-1H-pyrazol-1-yl)-1-ethanol (designated as DYX-327)

The synthesis was performed the same as Example 20 (yield: 29.5%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.60 (s, 1H), 7.90 (s, 1H), 7.70 (s, 1H), 7.27-7.20 (m, 3H), 7.05-6.98 (m, 2H), 6.91-6.85 (m, 2H), 6.75-6.70 (m, 1H), 6.13 (d, J=6.9 Hz, 1H), 4.95 (s, 1H), 4.63 (p, J=6.8 Hz, 1H), 4.14 (t, J=5.6 Hz, 2H), 3.75 (t, J=5.6 Hz, 2H), 1.46 (d, J=6.7 Hz, 3H).

LCMS (ESI), m/z: 410.4 [M+H]⁺

Example 115: Preparation of (E)-N-benzyl-3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-amine (designated as DYX-314)

The synthesis was performed the same as Example 29 (yield: 77.3%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.92 (s, 1H), 8.58 (dd, J=4.8, 1.8 Hz, 1H), 7.87 (d, J=16.4 Hz, 1H), 7.79 (td, J=7.7, 1.9 Hz, 1H), 7.55 (d, J=7.8 Hz, 1H), 7.51-7.45 (m, 2H), 7.38-7.30 (m, 3H), 7.29-7.19 (m, 3H), 7.01-6.92 (m, 2H), 6.21 (s, 1H), 4.38 (s, 2H).

LCMS (ESI), m/z: 327.1 [M+H]⁺

Example 116: Preparation of (R,E)-2-(4-(2-(5-((1-(3-fluorophenyl)ethyl)amino)-1H-indazol-3-yl)vinyl)-1H-pyrazol-1-yl)-1-ethanol (designated as DYX-335)

The synthesis was performed the same as Example 20 (yield: 37.2%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.55 (s, 1H), 7.90 (s, 1H), 7.70 (s, 1H), 7.40-7.26 (m, 3H), 7.22 (d, J=8.9 Hz, 1H), 7.06-6.95 (m, 2H), 6.92-6.79 (m, 2H), 6.72 (s, 1H), 6.09 (d, J=6.7 Hz, 1H), 4.94 (t, J=5.3 Hz, 1H), 4.58 (p, J=6.9 Hz, 1H), 4.15 (t, J=5.6 Hz, 2H), 3.76 (q, J=5.5 Hz, 2H), 1.46 (d, J=6.7 Hz, 3H).

LCMS (ESI), m/z: 392.4 [M+H]⁺

Example 117: Preparation of (R,E)-N-(1-(3,5-difluorophenyl)ethyl)-3-(2-(pyridin-2-yl)vinyl)-1H-pyrazolo[4,3-b]pyridin-5-amine (designated as DYX-332)

The synthesis was performed the same as Example 20 (yield: 64.5%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.90 (s, 1H), 8.58 (dd, J=4.8, 1.8 Hz, 1H), 7.92 (d, J=16.0 Hz, 1H), 7.81-7.64 (m, 3H), 7.51 (d, J=7.9 Hz, 1H), 7.37 (d, J=6.7 Hz, 1H), 7.28-7.17 (m, 3H), 6.95 (tt, J=9.3, 2.4 Hz, 1H), 6.77 (d, J=9.1 Hz, 1H), 5.17 (p, J=6.9 Hz, 1H), 1.49 (d, J=7.0 Hz, 3H).

LCMS (ESI), m/z: 375.1 [M+H]⁺

Example 118: Preparation of (R,E)-N-(1-(3,5-difluorophenyl)ethyl)-3-(2-(pyridin-2-yl)vinyl)-1H-pyrazolo[3,4-c]pyridin-5-amine (designated as DYX-340)

The synthesis was performed the same as Example 20 (yield: 32. 1%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.32 (s, 1H), 8.62-8.54 (m, 2H), 7.89-7.77 (m, 2H), 7.59 (d, J=7.8 Hz, 1H), 7.33-7.18 (m, 4H), 7.03-6.95 (m, 1H), 6.93 (s, 1H), 6.74 (d, J=8.0 Hz, 1H), 5.00 (p, J=7.0 Hz, 1H), 1.47 (d, J=6.8 Hz, 3H).

Example 119: Preparation of (R,E)-N-(1-(3,5-difluorophenyl)ethyl)-3-(2-(1-methyl-1H-pyrazol-4-yl)vinyl)-1H-indazol-5-amine (designated as DYX-346)

The synthesis was performed the same as Example 20 (yield: 49%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.58 (s, 1H), 7.87 (s, 1H), 7.68 (s, 1H), 7.27-7.19 (m, 3H), 7.06-6.98 (m, 2H), 6.91-6.84 (m, 2H), 6.73 (s, 1H), 6.13 (d, J=6.9 Hz, 1H), 4.62 (p, J=6.8 Hz, 1H), 3.85 (s, 3H), 1.46 (d, J=6.7 Hz, 3H).

Example 120: Preparation of (R,E)-N-(1-(3,5-difluorophenyl)ethyl)-3-(2-(1-ethyl-1H-pyrazol-4-yl)vinyl)-1H-indazol-5-amine (designated as DYX-349)

The synthesis was performed the same as Example 20 (yield: 52%).

¹H NMR (400 MHz, DMSO-d₆) δ 12.57 (s, 1H), 7.92 (s, 1H), 7.69 (s, 1H), 7.29-7.19 (m, 3H), 7.06-6.98 (m, 2H), 6.92-6.83 (m, 2H), 6.73 (s, 1H), 6.13 (d, J=6.8 Hz, 1H), 4.62 (p, J=6.5 Hz, 1H), 4.13 (q, J=7.3 Hz, 2H), 1.46 (d, J=6.7 Hz, 3H), 1.40 (t, J=7.3 Hz, 3H).

Example 121: Preparation of (E)-N-(3-(2-(1-(cyanomethyl)-1H-pyrazol-4-yl)vinyl)-1H-indazol-5-yl)-3,5-difluorobenzene sulfonamide (designated as CHW-1)

Preparation of an intermediate 121 was carried out as follows:

Step 1: Synthesis of 3-iodo-5-nitro-1H-indazole (intermediate 54)

5-Nitro-1H-indazole (10 g, 61.3 mmol) was added to a 250 mL dry flask. After the system was stirred to be clarified, N-iodosuccinimide (16.5 g, 73.6 mmol) was added, and reaction was carried out overnight at room temperature. After the completion of the reaction was detected by TLC, 100 mL of water was added to precipitate a large amount of yellow solid. Suction filtration was performed by using a Buchner funnel, and washed with water (30 mL*3) for three times. The obtained yellow solid was placed in a vacuum oven at 50° C. for 5 hours to obtain 16.8 g of compound 54 (yield: 94.7%), LCMS (ESI), m/z: 290.0, [M+H]⁺

Step 2: Synthesis of 3-iodo-5-nitro-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (intermediate 55)

3-Iodo-5-nitro-1H-indazole (10 g, 34.6 mmol) and p-toluenesulfonic acid monohydrate (1 g, 5.2 mmol) were added to a 250 mL single-necked flask, then 80 mL of dry DCM was added, and the mixture was stirred to be dissolved. The solution of 3,4-dihydro-2H-pyran was added in DCM at 0° C., and the system was gradually clarified, slowly heated, and stirred overnight at room temperature. After the completion of the reaction was detected by TLC, the reaction was quenched by adding saturated aqueous sodium bicarbonate solution. DCM was added for extraction for three times. Drying was performed with anhydrous sodium sulfate, then concentration was performed. Column chromatography was performed to obtain 8.3 g of compound 55 (yield: 64%), LCMS (ESI), m/z: 374.0, [M+H]⁺

Step 3: Synthesis of 3-iodo-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-amine (intermediate 102)

3-Iodo-5-nitro-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (6 g, 16 mmol), reduced iron powder (4.5 g, 80 mmol), and ammonium chloride (2.58 g, 48 mmol) were added to a 250 mL single-necked flask, followed by addition of 160 mL of a mixed solution of ethanol:water (3:1). The mixture was heated to react at 80° C. for 4 hours. After the completion of the reaction was detected by TLC, suction filtration was performed with diatomite, and ethyl acetate was added for extraction. The organic phase was dried, and concentrated. Column chromatography was performed to give 4.7 g of compound 102 (yield: 86%), LCMS (ESI), m/z: 344.0, [M+H]⁺

Step 4: Synthesis of 3,5-difluoro-N-(3-iodo-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-yl)benzenesulfonamide (an intermediate 121)

3-Iodo-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-amine (2.5 g, 7.3 mmol) was added to a 100 mL double-necked flask. 30 mL of pyridine was added under N₂ protection until dissolved. 3,5-difluorobenzenesulfonyl chloride (1.7 g, 8 mmol) was added with stirring so that the system become wine red, and the reaction was carried out overnight at room temperature. After the completion of the reaction was detected by TLC, saturated brine was added, followed by extraction with ethyl acetate for three times. The organic phase was dried over anhydrous sodium sulfate, and concentrated. Column chromatography was performed to give 2.0 g of compound 121 as pink solid (yield: 53%), ¹H NMR (500 MHz, DMSO-d₆) δ 10.47 (s, 1H), 7.69 (d, J=9.0 Hz, 1H), 7.60 (tt, J=9.2, 2.4 Hz, 1H), 7.42-7.35 (m, 2H), 7.25 (dd, J=8.9, 2.0 Hz, 1H), 7.08 (d, J=1.9 Hz, 1H), 5.78 (dd, J=9.7, 2.5 Hz, 1H), 3.84 (m, 1H), 3.69 (m 1H), 2.31 (m, 1H), 2.09-1.87 (m, 2H), 1.70 (m, 1H), 1.55 (m, 2H). LCMS (ESI), m/z: 520.0, [M+H]⁺

Preparation of compound CHW-1 was carried out as followed:

Step 1: Synthesis of 4-vinyl-1H-pyrazole (Intermediate 123)

Methyltriphenylphosphonium bromide (5.57 g, 15.6 mmol) was added to a 100 mL dry double-necked flask with N₂ replacement for five times. Solution of potassium tert-butoxide in tetrahydrofuran was added at 0° C., and a reaction was carried out for 1 hour while maintaining the temperature. Then solution of 1H-Pyrazole-4-carboxaldehyde tetrahydrofuran was added, and the reaction was carried out overnight at room temperature. After the completion of the reaction was detected by TLC, saturated aqueous ammonium chloride solution was added with stirring for 10 minutes. Ethyl acetate was added for extraction for three times. The organic phase was dried and concentrated. Column chromatography was performed to give compound 123 (0.68 g, 69%).

¹H NMR (500 MHz, Chloroform-d) δ 7.64 (s, 1H), 7.26 (s, 1H), 6.58 (m, 1H), 5.50 (dd, J=17.7, 1.4 Hz, 1H), 5.11 (dd, J=11.0, 1.4 Hz, 1H). LCMS (ESI), m/z: 95.1, [M+H]⁺

Step 2: Synthesis of 2-(4-vinyl-1H-pyrazol-1-yl)acetonitrile (intermediate 124)

4-vinyl-1H-pyrazole (0.8 g, 8 mmol), cesium carbonate (4.1 g, 12 mmol), and chloroacetonitrile (0.77 g, 10.1 mmol) were added to a 50 mL single-necked flask, followed by adding 10 mL of acetonitrile. The reaction was carried out overnight at room temperature. After the completion of the reaction was detected by TLC, the resulting reaction solution was filtrated by suction with diatomite, and the obtained filter residue was washed with acetonitrile for three times. The resulting filtrate was concentrated and column chromatography was performed to give compound 124 (1 g, 94%). ¹H NMR (500 MHz, DMSO-d₆) δ 7.92 (s, 1H), 7.76 (s, 1H), 6.56 (dd, J=17.7, 11.0 Hz, 1H), 5.54 (dd, J=17.7, 1.5 Hz, 1H), 5.45 (s, 2H), 5.08 (dd, J=11.0, 1.5 Hz, 1H). LCMS (ESI), m/z: 134.6, [M+H]⁺

Step 3: Synthesis of (E)-N-(3-(2-(1-(cyanomethyl)-1H-pyrazol-4-yl)vinyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-yl)-3,5-difluorobenzenesulfonamide (intermediate 125)

2(4-vinyl-1H-pyrazol-1-yl)acetonitrile (0.199 g, 1.5 mmol), palladium acetate (11.2 mg, 0.07 mmol), tris(2-tolyl)phosphine (30 mg, 0.15 mmol), and 3,5-difluoro-N-(3-iodo-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-yl)benzenesulfonamide (the intermediate 121) (500 mg, 0.99 mmol) were added to a 50 mL dry double-necked flask with N₂ replacement for five times, followed by addition of N,N-diisopropylethylamine (387 mg, 4.5 mmol) and 15 mL of N,N-dimethylformamide. The mixture was heated to 100° C., and the reaction was carried out overnight. After the completion of the reaction was detected by TLC, saturated brine (150 mL) was added, and extraction was performed with ethyl acetate (20 mL). The organic phase was dried over anhydrous sodium sulfate, concentrated, and column chromatography was performed to give compound 125 (242 mg, 50%).

¹H NMR (500 MHz, DMSO-d₆) δ 10.39 (s, 1H), 8.14 (s, 1H), 8.04 (s, 1H), 7.96 (s, 2H), 7.75 (d, J=1.9 Hz, 1H), 7.65 (d, J=9.0 Hz, 1H), 7.59 (dt, J=9.1, 2.3 Hz, 1H), 7.46-7.41 (m, 2H), 7.29-7.17 (m, 2H), 7.13 (dd, J=8.9, 2.0 Hz, 1H), 5.53 (s, 2H), 3.87 (m, 1H), 3.71 (m, 1H), 2.51 (m, 1H), 2.43-2.33 (m, 1H), 2.08-1.93 (m, 3H), 1.81-1.66 (m, 1H), 1.59 (m, 2H). LCMS (ESI), m/z: 525.1, [M+H]⁺

Step 4: Synthesis of (E)-N-(3-(2-(1-(cyanomethyl)-1H-pyrazol-4-yl)vinyl)-1H-indazol-5-yl)-3,5-difluorobenzenesulfonamide

Compound 125 (78 mg, 0.15 mmol) and trifluoroacetic acid (0.343 g, 3 mmol) were added to a 50 mL single-necked flask, and then 15 mL of dichloromethane was added. The reaction was carried out overnight at 40° C. After the completion of the reaction was detected by TLC, a large amount of trifluoroacetic acid were removed by rotary evaporation under vacuum. The reaction was quenched by adding saturated sodium bicarbonate, and extraction was performed with ethyl acetate for three times. The organic phase was dried over anhydrous sodium sulfate, and concentrated. Column chromatography was performed to give compound 126 (designated as CHW-1) (32 mg, 50%).

¹H NMR (500 MHz, DMSO-d₆) δ 13.10 (s, 1H), 8.12 (s, 1H), 8.01 (s, 1H), 7.72 (d, J=1.8 Hz, 1H), 7.59 (dt, J=9.1, 2.4 Hz, 1H), 7.51-7.37 (m, 3H), 7.32-7.11 (m, 2H), 7.06 (dd, J=8.9, 1.9 Hz, 1H), 5.52 (d, J=7.1 Hz, 2H). LCMS (ESI), m/z: 441.1, [M+H]⁺

Example 122: Preparation of (E)-N-(3-(2-(1-acetyl-1H-pyrazol-4-yl)vinyl)-1H-indazol-5-yl)-3,5-difluorobenzenesulfonamide (designated as CHW-2)

The synthesis was performed the same as Example 121 (yield: 35%).

¹H NMR (500 MHz, DMSO-d₆) δ 10.27 (s, 1H), 7.94 (s, 2H), 7.69 (d, J=1.8 Hz, 1H), 7.60 (dt, J=9.0, 2.4 Hz, 1H), 7.48-7.36 (m, 3H), 7.16 (m, 2H), 7.05 (dd, J=8.9, 1.9 Hz, 1H), 2.50 (p, J=1.9 Hz, 3H). LCMS (ESI), m/z: 444.1, [M+H]⁺

Example 123: Preparation of (E)-3,5-difluoro-N-(3-(2-(1-(1-(2,2,2-trifluoroethyl)-1H-pyrazol-4-yl)vinyl)-1H-indazol-5-yl)benzenesulfonamide (designated as CHW-3)

The synthesis was performed the same as Example 121 (yield: 61%).

¹H NMR (500 MHz, DMSO-d₆) δ 10.30 (s, 1H), 8.12 (s, 1H), 8.00 (s, 1H), 7.73 (d, J=1.8 Hz, 1H), 7.59 (dt, J=9.1, 2.4 Hz, 1H), 7.49-7.37 (m, 3H), 7.29-7.11 (m, 2H), 7.06 (dd, J=8.9, 1.9 Hz, 1H), 5.15 (q, J=9.1 Hz, 2H). LCMS (ESI), m/z: 484.1, [M+H]⁺

Example 124: Preparation of (E)-N-(3-(2-(1-(cyclopropyl-1H-pyrazol-4-yl)vinyl)-1H-indazol-5-yl)-3,5-difluorobenzenesulfonamide (designated as CHW-4)

The synthesis was performed the same as Example 121 (yield 73%).

¹H NMR (500 MHz, DMSO-d₆) δ 13.05 (s, 1H), 10.29 (s, 1H), 8.08 (s, 1H), 7.78 (s, 1H), 7.70 (s, 1H), 7.60 (dt, J=9.2, 2.4 Hz, 1H), 7.47-7.37 (m, 2H), 7.21-7.07 (m, 2H), 7.05 (dd, J=8.9, 1.9 Hz, 1H), 3.74 (tt, J=7.5, 3.9 Hz, 1H), 1.08 (m, 1H), 0.99 (m, 1H). LCMS (ESI), m/z: 442.1, [M+1-1]⁺

Example 125: Preparation of (E)-3-fluoro-N-(3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-yl)benzene sulfonamide (designated as CHW-5)

The synthesis was performed the same as Example 27 (yield: 55%).

¹H NMR (500 MHz, DMSO-d₆) δ 13.30 (s, 1H), 10.25 (s, 1H), 8.61 (d, J=5.0, 1H), 7.90-7.78 (m, 2H), 7.74 (m, 1H), 7.65 (d, J=7.9 Hz, 1H), 7.62-7.43 (m, 6H), 7.34 (s, 1H), 7.33-7.25 (m, 1H), 7.13 (m, 1H). LCMS (ESI), m/z: 495.1, [M+H]⁺

Example 126: Preparation of (E)-N-(3-(2-(1-(1-(difluoromethyl)-1H-pyrazol-4-yl)vinyl)-1H-indazol-5-yl)-3,5-difluorobenzene sulfonamide (designated as CHW-6)

The synthesis was performed the same as Example 121 (yield: 85%).

¹H NMR (500 MHz, DMSO-d₆) δ 13.07 (s, 1H), 10.28 (s, 1H), 8.06 (s, 1H), 7.93 (s, 1H), 7.71 (s, 1H), 7.60 (dt, J=9.2, 2.4 Hz, 1H), 7.47-7.35 (m, 3H), 7.25-7.09 (m, 2H), 7.05 (dd, J=8.9, 1.8 Hz, 1H), 6.39 (tt, J=54.9, 3.8 Hz, 1H), 4.65 (td, J=15.1, 3.8 Hz, 2H). LCMS (ESI), m/z: 466.1, [M+1-1]⁺

Example 127: Preparation of (E)-3,5-difluoro-N-(3-(2-(1-isopropyl-1H-pyrazol-4-yl)vinyl)-1H-indazol-5-yl)benzenesulfonamide (designated as CHW-7)

The synthesis was performed the same as Example 121 (yield: 36%).

¹H NMR (500 MHz, DMSO-d₆) δ 13.03 (s, 1H), 10.29 (s, 1H), 8.07 (s, 1H), 7.78 (s, 1H), 7.69 (s, 1H), 7.60 (td, J=9.1, 4.6 Hz, 1H), 7.47-7.35 (m, 3H), 7.22-7.08 (m, 2H), 7.05 (dd, J=8.8, 1.8 Hz, 1H), 4.50 (m, 1H), 1.46 (d, J=6.7 Hz, 6H). LCMS (ESI), m/z: 444.1, [M+H]⁺

Example 128: Preparation of (E)-3,5-difluoro-N-(3-(2-(pyridin-3-yl)vinyl)-1H-indazol-5-yl)benzenesulfonamide (designated as CHW-8)

The synthesis was performed the same as Example 121 (yield 41%).

¹H NMR (500 MHz, DMSO-d₆) δ 13.28 (s, 1H), 10.33 (s, 1H), 8.83 (m, 1H), 8.48 (dd, J=4.7, 1.5 Hz, 1H), 8.15 (d, J=7.8 Hz, 1H), 7.83 (m, 1H), 7.66 (m, 1H), 7.58 (tt, J=9.0, 2.4 Hz, 1H), 7.51-7.30 (m, 6H), 7.08 (dd, J=8.8, 1.9 Hz, 1H). LCMS (ESI), m/z: 413.1, [M+H]⁺

Example 129: Preparation of (E)-5-fluoro-N-(3-(2-(pyridin-2-yl)vinyl)-1H-indazol-5-yl)pyridine-3-sulfonamide (designated as CHW-9)

The synthesis was performed the same as the Example 27 (yield: 43%).

¹H NMR (500 MHz, DMSO-d₆) δ 13.36 (s, 1H), 10.47 (d, J=2.4 Hz, 1H), 8.83 (d, J=2.7 Hz, 1H), 8.72 (q, J=1.6 Hz, 1H), 8.67-8.56 (m, 1H), 8.03 (dt, J=8.3, 2.2 Hz, 1H), 7.99-7.76 (m, 3H), 7.69 (d, J=7.8 Hz, 1H), 7.52 (d, J=8.9 Hz, 1H), 7.38 (m, 1H), 7.33-7.26 (m, 1H), 7.14 (m, 1H). LCMS (ESI), m/z: 396.1, [M+H]⁺

Example 130: Preparation of (E)-2-(4-(2-(5-((3,5-difluorophenyl)sulfonamido)-1H-indazol-3-yl)vinyl)-1H-pyrazol-1-yl)-N,N-dimethylacetamide (designated CHW-10)

The synthesis was performed the same as Example 121 (yield: 91%).

¹H NMR (500 MHz, DMSO-d₆) δ 10.27 (s, 1H), 7.91 (s, 1H), 7.80 (s, 1H), 7.69 (s, 1H), 7.63-7.57 (td, J=9.1, 4.5 Hz, 1H), 7.46-7.37 (m, 3H), 7.19-7.08 (m, 2H), 7.05 (dd, J=8.8, 1.8 Hz, 1H), 5.11 (s, 2H), 3.05 (s, 3H), 2.87 (s, 3H). LCMS (ESI), m/z: 487.1, [M+H]⁺

Example 131: Preparation of (E)-N-(3-(2-(1-(1-(difluoromethyl)-1H-pyrazol-4-yl)vinyl)-1H-indazol-5-yl)-3,5-difluorobenzenesulfonamide (designated as CHW-11)

The synthesis was performed the same as Example 121 (yield: 78%).

¹H NMR (500 MHz, DMSO-d₆) δ 13.07 (s, 1H), 10.28 (s, 1H), 8.06 (s, 1H), 7.93 (s, 1H), 7.71 (d, J=1.8 Hz, 1H), 7.60 (dt, J=9.2, 2.4 Hz, 1H), 7.49-7.33 (m, 3H), 7.26-7.09 (m, 2H), 7.05 (dd, J=8.9, 1.8 Hz, 1H), 6.39 (tt, J=54.9, 3.8 Hz, 1H). LCMS (ESI), m/z: 452.1, [M+H]⁺

Example 132: Preparation of (E)-3,5-difluoro-N-(3-(2-(1-(2-(2-isopropoxyethyl)-1H-pyrazol-4-yl)vinyl)-1H-indazol-5-yl)benzenesulfonamide (designated as CHW-12)

The synthesis was performed the same as Example 121 (yield: 87%).

¹H NMR (500 MHz, DMSO-d₆) δ 10.29 (s, 1H), 7.99 (s, 1H), 7.82 (s, 1H), 7.69 (s, 1H), 7.60 (td, J=9.1, 4.5 Hz, 1H), 7.47-7.36 (m, 3H), 7.19-7.08 (m, 2H), 7.06 (dd, J=8.9, 1.8 Hz, 1H), 4.23 (t, J=5.5 Hz, 2H), 3.75 (t, J=5.5 Hz, 2H), 2.00 (s, 1H), 1.07 (d, J=6.1 Hz, 6H). LCMS (ESI), m/z: 488.2, [M+H]⁺

Example 133: Preparation of (E)-3,5-difluoro-N-(3-(2-(1-(2-(2-methoxyethyl)-1H-pyrazol-4-yl)vinyl)-1H-indazol-5-yl)benzene sulfonamide (designated as CHW-13)

The synthesis was performed the same as Example 121 (yield: 50%).

¹H NMR (500 MHz, DMSO-d₆) δ 13.04 (s, 1H), 10.29 (s, 1H), 8.00 (s, 1H), 7.81 (s, 1H), 7.69 (s, 1H), 7.60 (dt, J=9.2, 2.4 Hz, 1H), 7.47-7.38 (m, 3H), 7.19-7.08 (m, 2H), 7.06 (dd, J=8.9, 1.9 Hz, 1H), 4.28 (t, J=5.3 Hz, 2H), 3.72 (t, J=5.3 Hz, 2H), 3.27 (s, 3H). LCMS (ESI), m/z: 460.1, [M+1-1]⁺

Example 134: Preparation of (E)-2-(4-(2-(5-((3,5-difluorophenyl)sulfonamido)-1H-indazol-3-yl)vinyl)-1H-pyrazol-1-yl)-N-methylacetamide (designated as CHW-14)

The synthesis was performed the same as Example 121 (yield: 80%).

¹H NMR (500 MHz, DMSO-d₆) δ 13.04 (s, 1H), 10.27 (s, 1H), 7.99 (s, 1H), 7.83 (s, 1H), 7.69 (s, 1H), 7.60 (dt, J=9.1, 2.4 Hz, 1H), 7.45-7.36 (m, 3H), 7.22-7.08 (m, 2H), 7.05 (dd, J=8.8, 1.9 Hz, 1H), 4.78 (s, 2H), 2.64 (d, J=4.6 Hz, 3H). LCMS (ESI), m/z: 473.1, [M+H]⁺

Example 135: Preparation of (E)-3,5-difluoro-N-(3-(2-(1-methyl-1H-pyrazol-4-yl)vinyl)-1H-indazol-5-yl)benzenesulfonamide (designated as D5217)

The synthesis was performed the same as Example 121 (yield: 51%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.02 (s, 1H), 10.26 (s, 1H), 7.96 (s, 1H), 7.77 (s, 1H), 7.66 (s, 1H), 7.61 (dt, J=9.2, 2.4 Hz, 1H), 7.47 (m, 1H), 7.25-7.09 (m, 2H), 7.05 (dd, J=8.9, 1.8 Hz, 1H), 6.39 (tt, J=54.9, 3.8 Hz, 1H), 3.85 (td, J=15.1, 3.8 Hz, 3H).

LCMS (ESI), m/z: 414.4 [M+H]⁺

Example 136: Preparation of (E)-3,5-difluoro-N-(3-(2-(1-ethyl-1H-pyrazol-4-yl)vinyl)-1H-indazol-5-yl)benzenesulfonamide (designated as D5218)

The synthesis was performed the same as Example 121 (yield 46%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.02 (s, 1H), 10.26 (s, 1H), 7.96 (s, 1H), 7.77 (s, 1H), 7.66 (s, 1H), 7.61 (dt, J=9.2, 2.4 Hz, 1H), 7.47 (m, 1H), 7.25-7.09 (m, 2H), 7.05 (dd, J=8.9, 1.8 Hz, 1H), 6.39 (tt, J=54.9, 3.8 Hz, 1H), 4.15 (td, J=15.1, 3.8 Hz, 2H), 1.40 (td, J=15.1, 3.8 Hz, 3H).

LCMS (ESI), m/z: 428.4 [M+H]⁺

Example 137: Preparation of (E)-3,5-difluoro-N-(3-(2-(1H-pyrazol-4-yl)vinyl)-1H-indazol-5-yl)benzenesulfonamide (designated as D5220)

The synthesis was performed the same as Example 121 (yield: 47%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.02 (s, 1H), 10.26 (s, 1H), 7.96 (s, 1H), 7.77 (s, 1H), 7.66 (s, 1H), 7.61 (dt, J=9.2, 2.4 Hz, 1H), 7.47 (m, 1H), 7.25-7.09 (m, 3H), 7.05 (dd, J=8.9, 1.8 Hz, 1H), 6.39 (tt, J=54.9, 3.8 Hz, 1H).

LCMS (ESI), m/z: 400.4 [M+H]⁺

Example 138: Preparation of (E)-3,5-difluoro-N-(3-{2-[1-(2-hydroxyl-ethyl)-1H-pyrazol-4-yl]-vinyl}-1H-indazol-5-yl)-benzenesulfonamide (designated as D5221)

The synthesis was performed the same as Example 121 (yield: 42%).

¹H NMR (400 MHz, DMSO-d₆) δ 13.02 (s, 1H), 10.26 (s, 1H), 7.96 (s, 1H), 7.77 (s, 1H), 7.66 (s, 1H), 7.61 (dt, J=9.2, 2.4 Hz, 1H), 7.47 (m, 1H), 7.25-7.09 (m, 2H), 7.05 (dd, J=8.9, 1.8 Hz, 1H), 6.39 (tt, J=54.9, 3.8 Hz, 1H), 4.15 (td, J=15.1, 3.8 Hz, 2H), 1.40 (td, J=15.1, 3.8 Hz, 2H).

LCMS (ESI), m/z: 444.4 [M+H]⁺

Example 139 IC₅₀ test of compounds on TRKs

Kinase activity assay: Z′-LYTE™ technology (detection by fluorescence, enzyme-conjugated format, based on the difference in sensitivity of phosphorylated and non-phosphorylated peptides to proteolytic cleavage) was applied, and using the principle of fluorescence resonance energy transfer (FRET), a Z′-LYTE™ FRET peptide substrate (Z′-LYTE™ Tyrosine 1 Peptide Substrate, Invitrogen, PV3190), and a secondary reaction were used to detect the inhibitory activity of the compounds on TRKs (TRK1, TRK2, TRK3) (life technologies, PV3144, PV3616, PV3617).

Enzymatic reaction: In a 384-well plate, 5 μL of an enzyme-substrate system (50 mM HEPES pH 7.5, 0.01% BRIJ-35, 10 mM MgCl₂, 1 mM EGTA, 2 μM Tyr 01 Peptide Substrate) was added and 5 nL of compound (concentration gradient) was transferred thereto by using the echo520 ultramicro liquid pipetting system. After shaking for 10-20 min at room temperature, 200 nL, 12.5 nL and 25 nL of ATP (final concentrations are 400 uM, 25 uM and 50 uM, respectively) were transferred by using the echo520 ultramicro liquid pipetting system. After shaking and mixing, centrifuging was performed. A reaction was carried out at 30° C. in the dark for 1.5 hours.

Assay reaction: 2.54 of Development Solution (1:128 dilution) was added in each well, and incubated at 37° C. in the dark for 1 hour, and then 5 μL of Stop Reagent was added.

Plate reading: fluorescence signals were detected using a Perkin Elmer EnVision Multimode Plate Reader (excitation at 400 nm, and emission at 460 nm, and 535 nm).

Calculation: the inhibition rate of each well was calculated by the fully active well and control signal wells. The data were analyzed as follows:

Phosphorylation ratio=1−{(emission ratio×F100%−C100%)/[C0%−C100%+emission ratio×(F100%−F0%)]}×100;

Inhibition rate=100×(1−compound phosphorylation ratio/negative control phosphorylation ratio).

IC₅₀ values were calculated by using GraphPad Prism 5.0 software.

The remits of the kinase activity test are shown in Table 1.

TABLE 1
Compounds kinase activity
test results (IC50: nM)
	Compound
	number	TRKA	TRKB	TRKC
	DYX-048	33.2	15.3	9.7
	DYX-032	14.5	56.1	12.0
	DYX-038	9.3	32.4	1.9
	DYX-042	251.2	281.2	113.7
	DYX-082	15.2	67.8	8.5
	DYX-060	817.9	374.7	619.6
	DYX-054	7.1	12.2	5.4
	DYX-081	39.8	170.0	26.6
	DYX-059	250.3	>1000	160.1
	CCB-489	4.6	14.4	2.7
	DYX-083	627.5	>1000	190.6
	DYX-134X	70.9	211.0	28.3
	DYX-135X	49.4	70.5	22.5
	DYX-136X	4.8	91.0	5.8
	DYX-137X	33.8	80.8	21.9
	DYX-138X	757.0	356.0	262.0
	DYX-101	21.8	36.6	24.8
	DYX-090	9.9	79.9	35.7
	DYX-114	1.2	7.0	2.8
	DYX-105	105.8	353.3	226.4
	DYX-139	15.0	25.7	18.1
	DYX-132	3.3	9.8	3.0
	DYX-176	7.1	21.4	6.5
	DYX-191	9.1	37.1	16.6
	DYX-193	45.4	120.0	33.2
	DYX-164	196.0	741.0	226.0
	DYX-165	1.3	3.2	2.4
	DYX-174	46.8	242.0	94.1
	DYX-185	1.7	10.0	1.9
	DYX-187	18.7	20.3	6.2
	DYX-171	577.0	>1000	532.0
	DYX-183	598.2	>1000	456.2
	DYX-180	3.9	9.9	4.7
	DYX-119	648.3	>1000	226.4
	DYX-149	317.7	>1000	155.3
	DYX-150	3.3	9.4	4.1
	DYX-014	100	321	95
	DYX-021	110	360	79
	DYX-025	26	82	12
	DYX-027	>1000	>1000	>1000
	DYX-041	44	40	8
	DYX-074	72	435	41
	CCB-484	34.0	83.8	11.8
	DYX-044	501.0	>1000	652.0
	DYX-051	>1000	>1000	>1000
	DYX-071	217	385	113
	DYX-075	>1000	>1000	>1000
	DYX-092	51.7	310.2	199.9
	DYX-086	54.2	241.2	111.0
	DYX-108	8.1	43.1	21.4
	DYX-129	>1000	>1000	574.7
	DYX-130	319.3	993.1	235.3
	DYX-115	>1000	>1000	>1000
	DYX-131	31.3	71.3	20.0
	DYX-134Q	91.9	124.1	40.3
	DYX-135Q	291.9	817.2	211.5
	DYX-137Q	213.4	396.7	91.1
	DYX-03	4.0	10.9	8.6
	DYX-215	3.3	22.4	20.9
	DYX-07	10.6	40.3	104.3
	DYX-10	9.2	3.2	18.8
	DYX-05	1.6	10.9	6.0
	DYX-06	14.1	87.1	77.4
	DYX-09	10.6	14.8	4.2
	DYX-04	21.8	32.4	5.1
	DYX-216A	1.1	6.5	1.3
	DYX-170	8.1	18.4	1.9
	DYX-244-1	2.6	4.4	0.8
	DYX-244-2	16.3	22.1	1.9
	DYX-303	3.0	4.8	0.8
	DYX-305	1.8	9.5	1.3

It can be seen from the data in Table 1 that the indazole derivatives of the present disclosure have strong inhibitory activity on TRKs.

Example 140: Cell Proliferation Inhibitory Activity Study Based on Ba/F3-TRK Stable Strain

The BaF3 cells (mouse pre-B cells) used in this experiment were purchased from the Japanese Cell Bank, and BaF3-CD74-NTRK1, BaF3-ETV6-NTRK2, and BaF3-ETV6-NTRK3 monoclonal stable strains were constructed in our laboratory and were confirmed as completely correct by positive drug activity, protein expression, gene sequencing and other experiments.

The brief steps of stable strain construction are as follows: construct a pCDNA3.1(+) plasmid vector carrying genes such as CD74-NTRK1, ETV6-NTRK2 and ETV6-NTRK3; the plasmid was electroporated into Ba/F3 cells using the Amaxa® Cell Line Nucleofector® Kit V; 48 hours after electroporated, G418 with a final concentration of 1000 μg/ml was added for screening for two weeks, and then IL3 was removed, and continued screening to obtain polyclonal stable strains; then single clones were selected by a limiting dilution method. The stable strains were then identified using positive drugs, WB and gene sequencing; and the monoclonal clones that were identified as completely correct may be used for the study of cell proliferation inhibitory activity of inhibitors.

Cell proliferation inhibition activity study: the cells in the logarithmic growth phase were seeded into 96-well plates at 8000-12000 cells/well, and inhibitors at different concentrations (0-10 μM) were added the next day, and incubation was continued for 72 hours; then 10 μL of CCK-8 reagent was added to each well, and the incubation was continued for 1-3 hours; and then use a super microplate reader to measure their absorbance values at 450 nm and 650 nm. The half-inhibition concentration (IC50) was calculated using GraphPad Prism 8.0.0.

The test results are shown in Table 2.

TABLE 2
Test Results of Compound Cell Activity (IC50: nM)
Cpd	CD74-NTRK1	ETV6-NTRK2	ETV6-NTRK3
DYX-048	803.0	167.6	959.0
DYX-032	1916.0	2342.0	717.6
DYX-038	239.0	335.3	133.4
DYX-042	8714.0	>10000	8385.0
DYX-082	583.5	247.7	159.3
DYX-060	>10000	>10000	>10000
DYX-054	546.0	328.8	145.3
DYX-081	1441.0	1016.0	819.7
DYX-059	7935.0	8818.0	3253.0
CCB-489	145.7	165.4	56.2
DYX-083	7503.0	3020.0	3311.0
DYX-134X	2358.0	1876.0	846.2
DYX-135X	2991.0	2980.0	2398.0
DYX-136X	602.6	1072.0	733.3
DYX-137X	2418.0	3723.0	3179.0
DYX-138X	6648.0	4077.0	>10000
DYX-101	594.7	570.7	500.0
DYX-090	479.7	294.9	157.8
DYX-114	410.7	174.7	155.1
DYX-105	2457.0	2616.0	2272.0
DYX-139	2358.0	1787.0	1267.0
DYX-132	156.3	178.5	96.2
DYX-176	627.4	2525.0	1037.0
DYX-191	264.3	667.3	502.8
DYX-193	136.2	315.8	83.0
DYX-164	1930.0	2576.0	2243.0
DYX-165	126.2	48.9	43.7
DYX-174	1181.0	1912.0	623.1
DYX-185	32.6	43.9	23.7
DYX-187	172.1	624.6	277.7
DYX-171	8039.0	2728.0	2643.0
DYX-183	>10000	>10000	>10000
DYX-180	497.6	693.7	414.6
DYX-119	>10000	>10000	>10000
DYX-149	3078.0	2464.0	3099.0
DYX-150	65.24	163.5	120.5
DYX-014	8311.0	4698.0	3029.0
DYX-021	4933.0	3087.0	2601.0
DYX-025	2329.0	2560.0	916.7
DYX-027	>10000	>10000	>10000
DYX-041	724.0	1989.0	795.7
DYX-074	2499.0	2826.0	2197.0
CCB-484	820.4	1970.0	477.3
DYX-044	>10000	>10000	>10000
DYX-051	>10000	>10000	>10000
DYX-071	7726.0	2891.0	2745.0
DYX-075	2483.0	>10000	>10000
DYX-092	3060.0	2609.0	2766.0
DYX-086	3597.0	2603.0	3713.0
DYX-108	888.1	914.3	748.8
DYX-129	9984.0	2798.0	3151.0
DYX-130	3815.0	9838.0	3086.0
DYX-115	>10000	>10000	>10000
DYX-131	2898.0	1611.0	2206.0
DYX-134Q	>10000	4620.0	2647.0
DYX-138Q	>10000	>10000	>10000
DYX-135Q	>10000	>10000	>10000
DYX-136Q	4598.0	3097.0	2094.0
DYX-137Q	>10000	>10000	>10000
DYX-03	126.0	157.5	75.2
DYX-215	146.5	170.3	109.6
DYX-07	211.3	967.8	284.1
DYX-10	630.0	776.5	393.9
DYX-05	580.2	678.4	418.8
DYX-06	640.1	723.0	492.1
DYX-09	69.0	98.4	167.7
DYX-04	173.8	728.5	240.0
E01F02	18.9	133.3	40.7
E01F07	35.76	441.1	92.9
D01F08	112.2	399.8	158.0
D02F01	204.1	361.7	150.9
D05F01	202.7	462.2	366.5
D06F01	564.4	>10000	851.0
D07F01	2309.0	3024.0	2045.0
D09F01	40.6	56.1	18.1
DYX-216A	12.6	8.7	7.2
DYX-170	99.4	242.4	166.8
DYX-223	37.7	24.3	35.6
DYX-220	21.2	31.7	22.6
DYX-222	37.3	54.7	41.5
DYX-227	37.5	56.0	33.2
DYX-228	11.9	20.5	11.6
DYX-226	48.7	48.1	34.4
DYX-231	619.2	779.5	547.3
DYX-230	682.4	302.9	359.5
DYX-235	20.0	32.6	34.2
DYX-236	111.6	116.4	196.1
DYX-244-1	9.8	20.3	6.9
DYX-244-2	129.7	230.2	255.7
DYX-303	10.1	20.0	7.1
DYX-305	28.2	51.3	22.9
DYX-400	59.0	154.1	41.1
DYX-401	113.2	447.5	111.8
DYX-402	28.2	53.5	22.6
DYX-403	52.6	137.0	180.0
DYX-409	6.4	36.9	7.7
DYX-410	10.3	11.7	3.5
DYX-411	35.7	38.0	11.0
DYX-412	109.9	115.0	35.6
DYX-413	40.8	375.9	160.7
DYX-414	195.7	2524.0	1177.0
DYX-415	50.8	510.3	155.7
DYX-416	21.0	88.7	34.3
DYX-417	157.8	2528.0	578.7
DYX-418	7.6	41.0	16.2
DYX-419	2.4	11.9	4.0
D01F11	12.9	159.5	25.6
E01F08	43.8	219.9	82.9
E01F10	68.9	610.0	156.2
DYX-346	6.5	9.5	3.1
DYX-349	7.4	10.7	4.3
DYX-320	37.6	32.4	10.4
DYX-318	9.6	33.6	9.1
DYX-327	1.4	17.6	5.4
DYX-314	154.1	165.3	148.6
DYX-335	0.6	10.7	3.3
DYX-332	9.9	146.0	46.5
DYX-340	18.7	160.0	68.0
CHW-1	35.5	43.1	39.2
CHW-2	106.6	185.4	126.7
CHW-3	92.0	165.3	122.8
CHW-4	3.1	8.2	7.0
CHW-5	27.3	70.1	59.5
CHW-6	23.0	60.1	53.5
CHW-7	33.4	57.8	40.9
CHW-8	143.0	247.9	173.9
CHW-9	60.8	134.4	120.6
CHW-10	274.1	439.3	389.6
CHW-11	53.8	103.4	111.2
CHW-12	33.8	55.8	48.1
CHW-13	40.2	52.3	41.3
CHW-14	331.4	427.1	350.4
D5217	90.9	170.9	124.7
D5218	10.6	19.1	14.1
D5220	120.3	214.8	175.3
D5221	144.5	195.9	128.4

It can be seen from the data in Table 2 that the indazole derivatives of the present disclosure have strong inhibitory activity on the cell proliferation of Ba/F3-TRKs stable strains.

Example 141: Rat Hepatocyte Stability Experiment

In William medium E, dilute the 37° C. rat hepatocyte suspension to an appropriate density (viable cell density=2×10⁶ cells/mL). In addition, a 2× quantification solution (the concentration of the test compound was 2 μM) was additionally prepared in William's medium E. The hepatocyte solution and 2× quantification solution were preheated in a water bath of 37° C. 404 of the preheated hepatocyte solution (2×10⁶ cells/mL) was added into the designated wells for 5, 15, 30, 60, and 120 min, and add 404 of the preheated 2× quantification solution and start timing. An assay plate was placed in a 37° C., 5% CO₂ incubator with shaking at 110 rpm. At 5, 15, 30, 60, and 120 minutes, 240 μL of ACN containing IS was added to each well. The plate was then sealed and stored in a −35° C. freezer. After collecting at all time points, the plate was shaken for 2 minutes and then centrifuging was performed for 15 minutes at 6000 rmp. 100 μL of supernatant from each well was transferred to a 96-well sample plate containing 100 μL of water for LC/MS analysis, determination of compound concentrations, calculation of rate constants and half-lives. The results are shown in Table 3.

TABLE 3
			Residual percentage (%)
					15	30	60
Compound	Genus	0 min	5 min	min	min	min	120 min	Half-life (min)
Testosterone	Rats	Average	100.00	21.21	5.78	BQL	BQL	BQL	2.23
		value
		Relative	0.05	0.13	0.10	N/A	N/A	N/A
		standard
		deviation
		of area
		ratio
DYX165	Rats	Average	100.00	92.73	84.16	73.15	59.81	58.02	154.14
		value
		Relative	0.01	0.03	0.03	0.07	0.02	0.03
		standard
		deviation
		of area
		ratio
DYX244-1	Rats	Average	100.00	71.83	48.63	14.84	8.20	5.40	11.12
		value
		Relative	0.01	0.08	0.05	0.02	0.17	0.34
		standard
		deviation
		of area
		ratio
DYX318	Rats	Average	100.00	27.83	12.24	1.36	0.27	0.20	2.71
		value
		Relative	0.03	0.03	0.00	0.10	0.10	0.37
		standard
		deviation
		of area
		ratio

Compounds DYX165, DYX244-1 and DYX318 all showed strong inhibitory activity against TRKs kinase and cell proliferation of the Ba/F3-TRK stable strains. X in Compound DYX165 is sulfonamide group, which has better metabolic stability.

Example 142: Pharmacokinetic Evaluation

Pharmacokinetics and oral bioavailability were tested in SD rats. According to the solubility of the drug, a single dose was administered orally, intravenously or by intraperitoneal injection. Animal blood samples were collected at different time points (0, 0.5, 1, 2, 4, 6, 8, and 24 hours), anticoagulated with heparin, and centrifuged to take the supernatant. Blood samples were analyzed by HPLC-MS. DAS2.1 was used for data analysis to detect half-life (T_1/2), maximum blood concentration (C_max), time to peak (T_max), area under the drug-time curve (AUC), and bioavailability (BA) and other pharmacokinetic data. The results are shown in Table 4.

TABLE 4
Compound	DYX244-1	DYX165
Administration	Intravenous	Oral	Oral
mode	injection	administration	administration
Dose (mg/kg)	2	10	25
Half-life (h)	1.39	1.13	1.54
Time to Peak (h)	0.08	2.00	4.00
Maximum blood	6.77	0.36	91.56
concentration (μM)
Area under the drug-time	3.68	1.62	1035.70
curve (0-t) (μM · h)
Area under the drug-time	3.69	1.64	1035.78
curve (0-∞) (μM · h)
Removal rate (L/h/kg)	1.44	nd	nd
Bioavailability (%)	8.79

Compounds DYX165 and DYX244-1 have strong inhibitory activity against TRKs kinase and cell proliferation of the Ba/F3-TRK stable strains. X in compound DYX165 is sulfonamido, which has better oral absorption properties. At an oral dose of 25 mg/kg in rats, the highest blood concentration of compound DYX165 was up to 91.56 μM, and the area under the drug-time curve was up to 1035.70 μM·h. The results indicate that when X in the compound of the formula (I) of the present disclosure is sulfonamido, it has better pharmacokinetic properties.

The technical features of the above-described examples can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features of the above-described examples are described. However, as long as there is no contradiction between the combinations of these technical features, they should be considered to fall within the scope of the present description.

The above-described examples only express several embodiments of the present disclosure, and their descriptions are specific and detailed, but should not to be construedas limitation of the patent scope of the present invention. It should be noted that for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present disclosure, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. Indazole derivatives or their pharmaceutically acceptable salts or stereoisomers having the structure shown in formula (I):

2. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1, wherein both A1 and A2 are CH, and A3 is N or CH.

3. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1, wherein A1 is N or CH, and both A2 and A3 are CH.

4. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1, wherein X1-X2 formed by X1 and X2 together is selected from: —(CR1R2)n—, —O—, —S—, —S(O)—, —S(O2)—, —C(O)—, —N(C1-C6 alkyl)-, —(CH2)n—O—, —O—(CH2)n—, —(CR1R2)n—N(R3)—, —N(R3)—(CR1R2)n—, —(CH2)n—S—, —S—(CH2)n—, —S(O2)N(R3)—, —N(R3)S(O2)—, —N(R3)C(O)N(R3)—, one or more R1 substituted or unsubstituted C3-C8 cycloalkyl, and one or more R1 substituted or unsubstituted 3-8 membered heterocycloalkyl; R1 and R2 are each independently selected from: hydrogen, C1-C6 alkyl;each R3 is independently selected from: H, C1-C6 alkyl; andn is selected from an integer between 1-4.

5. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 4, wherein X1-X2 formed by X1 and X2 together is selected from: —(CR1R2)n—, —O—, —S—, —S(O2)—, —N(C1-C3 alkyl)-, —(CH2)n—O—, —O—(CH2)n—, —(CR1R2)n—N(R3)—, —NR3—(CR1R2)n—, —S(O2)N(R3)—, —N(R3)S(O2), and 5-6 membered heterocycloalkyl; R1 and R2 are each independently selected from: hydrogen, C1-C3 alkyl;each R3 is independently selected from: H, C1-C3 alkyl; andn is selected from: an integer between 1-2.

6. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 5, wherein X1-X2 formed by X1 and X2 together is selected from: —CH2—, —O—, —S—, —S(O2)—, —OCH2—, —N(CH3)—, —CH2O—, —CH2NH—, —CH2N(CH3)—, —NH—S(O2)—, —S(O2)—NH—, —NHCH2—, —NHCH(CH3)—, —CH(CH3)NH—, —N(CH3)CH2—, —CH2CH2—,

7. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 6, wherein X1-X2 formed by X1 and X2 together is selected from: —S(O2)—, —CH2CH2—; or X1 is —O— and X2 is CH2—.

8. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 6, wherein X1 is —NH— and X2 is selected from: —S(O2)—, —CH2—, —CH(CH3)—.

9. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1, having a structure shown in formula (II) or formula (III):

10. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1, wherein B1 is selected from: one or more R4 substituted or unsubstituted phenyl, one or more R4 substituted or unsubstituted pyridinyl, one or more R4 substituted or unsubstituted pyrimidinyl, one or more R4 substituted or unsubstituted naphthyl, one or more R4 substituted or unsubstituted quinolinyl, one or more R4 substituted or unsubstituted pyrazolyl, one or more R4 substituted or unsubstituted pyrrolyl, one or more R4 substituted or unsubstituted thienyl, one or more R4 substituted or unsubstituted furanyl, one or more R4 substituted or unsubstituted pyrazinyl.

11. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1, wherein each R4 is independently selected from: hydrogen, C1-C3 alkyl, halogen, halogenated C1-C3 alkyl, cyano, C1-C3 alkoxy, C1-C4 alkyl sulfonyl, C1-C3 alkylsulfonamido.

12. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1, wherein each R4 is independently selected from: hydrogen, halogen, nitro, amino, hydroxyl, mercapto, trifluoromethyl, cyano, formamido, methylamino, trifluoromethoxy, difluoromethoxy, difluoromethyl, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, neopentyl, methoxy, ethoxy, isopropoxy, tert-butoxy, methoxyethyl, ethoxyethyl, methylthio, ethylthio, isopropylthio, tert-butylthio, methylsulfonyl, ethylsulfonyl, isopropylsulfonyl, tert-butyl sulfonyl, methylsulfonamido.

13. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1, wherein B1 is selected from:

14. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 13, wherein B1 is selected from:

15. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1, wherein B2 is selected from: one or more R5 substituted or unsubstituted phenyl, one or more R5 substituted or unsubstituted naphthyl, one or more R5 substituted or unsubstituted quinolinyl, one or more R5 substituted or unsubstituted pyrazolyl, one or more R5 substituted or unsubstituted pyrrolyl, one or more R5 substituted or unsubstituted thienyl, one or more R5 substituted or unsubstituted furanyl, one or more R5 substituted or unsubstituted pyridyl, one or more R5 substituted or unsubstituted pyrimidinyl, one or more R5 substituted or unsubstituted pyrazinyl, one or more R5 substituted or unsubstituted triazolyl, —C(O)NR6R7.

16. The indazole derivatives or theirs pharmaceutically acceptable salts or stereoisomers according to claim 15, wherein B2 is selected from:

17. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 16, wherein B2 is selected from:

18. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1, wherein each R5 is independently selected from: hydrogen, C1-C3 alkyl, halogen, halogenated C1-C3 alkyl, cyano, C1-C3 alkoxy, hydroxyl-substituted C1-C3 alkyl, cyano-substituted C1-C3 alkyl, C1-C3 alkoxy C1-C3 alkyl, —C(O)—C(R3)3, cyclopropyl, N(R3)2C(O)—(C(R3)2)n—, wherein each R3 is independently selected from: H, C1-C3 alkyl.

19. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 18, wherein each R5 is independently selected from: hydrogen, hydroxyl-substituted C1-C3 alkyl, C1-C3 alkyl, cyano-substituted C1-C3 alkyl, cyclopropyl, C1-C3 alkoxy C1-C3 alkyl.

20. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1, wherein each R5 is independently selected from: hydrogen, hydroxyl, amino, mercapto, halogen, trifluoromethyl, cyano, trifluoromethoxy, difluoromethoxy, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, neopentyl, methoxy, ethoxy, isopropoxy, tert-butoxy, methylthio, ethylthio, isopropylthio, tert-butylthio, methoxyethyl, ethoxyethyl, hydroxylmethyl, hydroxylethyl, hydroxylpropyl, cyano-substituted methyl, cyano-substituted ethyl, acetyl, 2,2,2-trifluoroethyl, cyclopropyl, 2,2-difluoroethyl, N,N-dimethylacetamido, difluoromethyl, isopropoxy-substituted ethyl, N-methylacetamido.

21. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1, wherein R6 and R7 are each independently selected from: hydrogen, C1-C6 alkyl, or R6 and R7 together with the nitrogen atom to which they are attached form one or more R8 substituted or unsubstituted 4-8 membered heterocyclyl.

22. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 21, wherein R6 and R7 are each independently selected from: hydrogen, C1-C3 alkyl, or R6 and R7 together with the nitrogen atom to which they are attached form a heterocyclyl having the following structure:

23. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 22, wherein R6 and R7 are each independently selected from: hydrogen and methyl, or R6 and R7 together with the nitrogen atom to which they are attached form a heterocyclyl having the following structure:

24. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1, having a structure shown in formula (II):

25. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1, having a structure shown in formula (III):

26. The indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1, is selected from the following compounds:

27. A pharmaceutical composition for preventing or treating tumors prepared from an active ingredient and a pharmaceutically acceptable excipient, wherein the active ingredient includes the indazole derivatives or their pharmaceutically acceptable salts or stereoisomers according to claim 1.

28. The pharmaceutical composition according to claim 27, wherein the tumors are non-small cell lung cancer, breast cancer, colon cancer, prostate cancer, thyroid cancer, malignant melanoma, neuroblastoma and mammary analog secretory carcinoma.