VODOBATINIB

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Vodobatinib Chemical Structure

VODOBATINIB

1388803-90-4

Molecular Weight	453.92
Appearance	Solid
Formula	C₂₇H₂₀ClN₃O₂

SCO-088
K0706
K-0706

2-chloro-6-methyl-N‘-[4-methyl-3-(2-quinolin-3-ylethynyl)benzoyl]benzohydrazide

Vodobatinib (K0706) is a potent, third generation and orally active Bcr-Abl1 tyrosine kinase inhibitor with an IC₅₀ of 7 nM. Vodobatinib exhibits activity against most BCR-ABL1 point mutants, and has no activity against BCR-ABL1T315I. Vodobatinib can be used for chronic myeloid leukemia (CML) research. Vodobatinib is a click chemistry reagent, itcontains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.

Vodobatinib (K0706) is a potent, third generation and orally active Bcr-Abl1 tyrosine kinase inhibitor with an IC₅₀ of 7 nM. Vodobatinib exhibits activity against most BCR-ABL1 point mutants, and has no activity against BCR-ABL1T315I. Vodobatinib can be used for chronic myeloid leukemia (CML) research^[1]^[2]. Vodobatinib is a click chemistry reagent, itcontains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.

Brain penetrant kinase inhibitors: Learning from kinase neuroscience discovery

Publication Name: Bioorganic & Medicinal Chemistry Letters

Publication Date: 2018-06-15

PMID: 29752185

DOI: 10.1016/j.bmcl.2018.05.007

PATENT

WO2012098416

https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2012098416

EXAMPLES

Reƒerence Example 1

Methyl 3-ethynyl-4-methylbenzoate

A mixture of methyl 3-iodo-4-methylbenzoate (2.0g, 7mmol), trimethylsilylacetylene (1.2ml, 8mmol), Pd(PPh₃)₄ (0.42g, 0.3mmol), CuI (0.137g, 0.7mmol) and diisopropylethylamine (2.5ml, 11.4mmol) in THF (20ml) was heated at 50°C for 12hrs under nitrogen atmosphere. The reaction mixture was cooled to ambient temperature and filtered through a Celite^® bed. The clear filtrate was concentrated and the residue purified by flash chromatography on silica gel (elution with 2% ethyl acetate in n-hexane) to provide methyl 4-methyl-3-[(trimethylsilyl)ethynyl]benzoate.

To the solution of methyl 4-methyl-3-[(trimethylsilyl)ethynyl]benzoate (2.3g) in THF (40ml) was added tetrabutylammonium fluoride (1.0M in THF, 3.2ml, 1 1mmol) at ambient

temperature and stirred for 15 minutes, concentrated and the residue purified by flash chromatography on silica gel (elution with 2% ethyl acetate in n-hexane) to provide methyl 3 – ethynyl- 4-methylbenzo at e .

¹H NMR (500 MHz in DMSO-d₆), δ 2.50 (s, 3H), 3.90 (s, 3H), 4.57 (s, 1H), 7.51 (d, J = 8.0 Hz, 1H), 7.91 (d, J = 8.0 Hz, 1H), 7.99 (s, 1H).

Similarly were prepared the following ester compounds from their corresponding iodo esters:

Methyl 3-ethynyl-4-fluorobenzoate

Methyl 3-ethynyl-4-methoxybenzoate

Reƒerence Example 2

4-Methyl-3-[(quinolin-3-yl)ethynyl]benzoic acid

A mixture of methyl 3-ethynyl-4-methylbenzoate (0.341 g, 2mmol), 3-iodoquinoline (0.5g, 2mmol), Pd(PPh₃)₄ (0.1 1g, 0.01mmol), CuI (0.179g, 0.1mmol) and diisopropylethylamine (0.5ml, 3mmol) in DMF (15ml) was stirred at ambient temperature for 12hrs under an atmosphere of nitrogen. The reaction mixture was concentrated and the crude product was purified by flash chromatography on silica gel (elution with 10% ethyl acetate in n-hexane) to provide methyl 4-methyl-3-[(quinolin-3-yl)ethynyl]benzoate.

Sodium hydroxide (0.15g, 3.71mmol) was added to a solution of the above methyl ester in methanol (20ml) and water (3ml) and stirred at 50°C for 3hrs and then concentrated in vacuo. Water (10ml) was added to the residue, adjusted pH to 4.0-4.5 with citric acid. The solid obtained was filtered, washed successively with water and diethyl ether and dried at ambient temperature to obtain 4-methyl-3-[(quinolin-3-yl)ethynyl]benzoic acid. ¹H NMR (500 MHz in DMSO-d₆), δ 2.66 (s, 3H), 7.56 (d, J = 8.0 Hz, 1H), 7.75 (t, J; = 15.1 Hz, J₂ = 8.2 Hz, 1H), 7.89 (t, J_} = 13.7 Hz, J₂ = 8.5 Hz, 1H), 7.95 (d, J = 8.0 Hz, 1H), 8.09 (d, J = 8.2 Hz, 1H), 8.12 (d, J = 8.1 Hz, 1H), 8.17 (s, 1H), 8.75 (s, 1H), 9.1 1 (s, 1H), 12.84 (s, 1H).

Reƒerence Example 3

4-Methyl-3-[2-(3-quinolyl)ethynyl]benzohydrazide

A mixture of 4-methyl-3-[(quinolin-3-yl)ethynyl]benzoic acid (0.15g, 0.5mmol), N-(3-dimethylaminopropyl)-N’-ethylcarbodiimide hydrochloride (0.15g, 0.7mmol) and 1-hydroxybenzotriazole (0.1g, 0.7mmol) in N,N-dimethylformamide (15ml) was stirred at room temperature for 1hr. Hydrazine hydrate (1.52ml, 0.5mmol) was then added and the mixture stirred for another 3hrs. Concentration and trituration of the residue with water produced a solid which was filtered, washed successively with water and diethyl ether, and finally dried in vacuo to get the hydrazide as a pale yellow solid.

¹H NMR (400 MHz in DMSO-d₆), δ 2.63 (s, 3H), 4.79 (s, 2H), 7.51 (d, J = 8.0 Hz, 1H), 7.75 (t, J₁ = 14.7 Hz, J₂ = 7.6 Hz, 1H), 7.85-7.96 (m, 2H), 8.09-8.13 (m, 3H), 8.73 (s, 1H), 9.09 (s, 1H), 9.91 (s, 1H).

Reƒerence Example 4

N’-(3-iodo-4-methylbenzoyl)-2,4,6-trichlorobenzohydrazide

N’-(3-iodo-4-methylbenzoyl)-2,4,6-trichlorobenzohydrazide was prepared by the reaction of 3-iodo-4-methylbenzoic acid with 2,4,6-trichlorobenzohydrazide. The coupling was performed in a manner similar to that described in Reference Example 3.

Example 1.1

2,4,6-Trichloro-N’-[4-methyl-3-[2-(3-quinolyl)ethynyl]benzoyl]benzohydrazide

Method A:

A mixture of 4-methyl-3-[(quinolin-3-yl)ethynyl]benzoic acid (0.15g, 0.5mmol), N-(3-dimethylaminopropyl)-N’-ethylcarbodiimide hydrochloride (0.15g, 0.7mmol) and 1-hydroxybenzotriazole (0.1g, 0.7mmol) in N,N-dimethylformamide (15ml) was stirred at ambient temperature for 1hr. 2,4,6-Trichlorobenzohydrazide (0.125g, 0.5mmol) was added and the mixture stirred for 12hrs at ambient temperature. Concentration and trituration of the residue with water produced a solid which was filtered, washed with water and the crude product was purified by flash chromatography on silica gel (elution with 10% methanol in dichloromethane) to get 2,4,6-trichloro-N-[4-methyl-3-[2-(3-quinolyl)ethynyl]benzoyl] benzohydrazide as a white solid.

Method B:

2,4,6-Trichloro-N’-[4-methyl-3-[2-(3-quinolyl)ethynyl]benzoyl] benzohydrazide was also prepared by the reaction of 4-methyl-3-[(quinolin-3-yl)ethynyl]benzoic acid with 2,4,6-trichlorobenzohydrazide in diethyl cyanophosphonate. The condensation reaction was performed in a manner similar to that described in Method A.

Method C:

2,4,6-Trichloro-N-[4-methyl-3-[2-(3-quinolyl)ethynyl]benzoyl]benzohydrazide was also prepared by the reaction of 4-methyl-3-[(quinolin-3-yl)ethynyl]benzohydrazide with 2,4,6- trichlorobenzoyl chloride. The condensation reaction was performed in a manner similar to that described in Method A.

The compounds 1.2 to 1.14, 1.21 to 1.34, 1.36 to 1.40, and 1.43 to 1.59 were prepared in a manner similar to Example I.1, by following either of the methods A, B or C, using the appropriate substrates.

PATENT

WO2023214314 VODOBATINIB FOR REDUCING PROGRESSION OF PARKINSON’S DISEASE (wipo.int)

Vodobatinib (N’-(2-chloro-6-methylbenzoyl)-4-methyl-3-[2-(3-quinolyl) ethynyl]-benzohydrazide), a c-Abl inhibitor is represented by Formula I (referred hereinafter interchangeably as vodobatinib or compound of Formula

International Publication Nos. WO 2017/208267A1, WO 2020/250133 Al and WO 2022/024072A1, which are hereby incorporated by reference, disclose methods of use of the compound of Formula I for the treatment of Parkinson’s disease, synucleinopathies and Alzheimer’s disease (AD) respectively.

There is a continuing need for effective and safe methods for the treatment of, and delaying the progression of, neurodegenerative diseases, including in the early-stage of the diseases.