- Synthesis method of 6-chloroimidazo[1, 2-b]pyridazine-3-carbonitrile
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The invention relates to a synthesis method of 6-chloroimidazo[1, 2b]pyridazine-3-carbonitrile, which comprises the following steps of 1, adding N, N-dimethylformamide dimethyl acetal into a reactor to react with 3-amino-6-chloropyridazine, thereby obtaining an N, N-dimethyl-N'-3-(6-chloro-pyridazine)yl-formamidine intermediate; 2, adding a solvent into the N, N-dimethyl-N'-3-(6-chloro-pyridazine)yl-formamidine intermediate obtained in the step 1, mixing, adding bromoacetonitrile, reacting, adding alkali liquor, standing, separating out solid, and filtering to obtain a solid mixture, 3, completely dissolving the solid mixture obtained in the step 4 in ethyl acetate, washing with water and saturated edible salt water, drying, filtering, and removing ethyl acetate to obtain a crude product of 6-chloroimidazo[1, 2-b]pyridazine-3-carbonitrile, and 4, recrystallizing the crude product of the 6-chloroimidazo[1, 2-b]pyridazine-3-carbonitrile, and filtering to obtain a pure product of the 6-chloroimidazo[1, 2-b] pyridazine-3-carbonitrile. The method is short in overall process time, and the obtained product is stable in quality and high in purity.
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Paragraph 0021-0032
(2021/02/06)
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- Convenient two-step one-pot synthesis of 3-substituted imidazo[1,2-a]pyridines and imidazo[1,2-b]pyridazines
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Abstract: A convenient and novel two-step one-pot method for the synthesis of 3-substituted imidazo[1,2-a]pyridines and 3-substituted imidazo[1,2-b]pyridazines was developed through the reaction of heterocyclic amines and N,?N-dimethylformamide dimethyl a
- Fan, Hongli,Li, Fenghai
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- TGF-Beta Inhibitors
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Disclosed are imidazole and thiazole compounds, as well as pharmaceutical compositions and methods of use thereof. One embodiment is a compound having the structure and pharmaceutically acceptable salts, prodrugs and N-oxides thereof (and solvates and hydrates thereof), wherein X, A, Z, R1 and R′ are as described herein. In certain embodiments, a compound disclosed herein inhibits TGF-β, and can be used to treat disease by blocking TGF-β signaling.
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Paragraph 0958-0959
(2016/09/26)
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- COMPOUNDS AND COMPOSITIONS AS TRK INHIBITORS
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The invention provides compounds, pharmaceutical compositions comprising such compounds and methods of using such compounds to treat or prevent diseases or disorders associated with abnormal or deregulated TRK kinase activity.
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Page/Page column 51
(2012/03/27)
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- IMIDAZOPYRIDAZINES FOR USE AS PROTEIN KINASE INHIBITORS
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There is provided compounds of formula (I): wherein Z, M, R1, X, R3, R4 and R5 have meanings given in the description, an pharmaceutically-acceptable esters, amides, solvates or salts thereof, which compounds are useful in the treatment of diseases in which inhibition of a protei kinase (e.g. a PIM family kinase or PI3-K) is desired and/or required, an particularly in the treatment of cancer.
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Page/Page column 82
(2009/06/27)
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