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CAS No. : | 500011-86-9 | MDL No. : | MFCD08689880 |
Formula : | C9H5BrClN3O2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | FORBXGROTPOMEH-UHFFFAOYSA-N |
M.W : | 302.51 | Pubchem ID : | 11587535 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Step 5: Preparation of N'- (3- { [5-bromo-2- (3-chloro-pyridin -2-yl) -2No.-pyrazole-3-carbonyl] -amino} -4 , 6-dichloro- pyridine-2-carbonyl) -hydrazinecarboxylic acid methyl ester; 5-Bromo-2- (3-chloro-pyridin-2-yl) -2H-pyrazole-3-carboxylic acid (example 1, step 5) (142 mg) was suspended in acetonitrile (1 ?iL) and pyridine (65 muL) and methanesulfonyl chloride (50 muL) were added. The reaction mixture was stirred for 30 min at room temperature, 3- amino-4 , 6-dichloro-pyridine-2-carboxylic acid (99 mg) in acetonitrile (1 mL) and pyridine (130 muL) were added and the reaction mixture was stirred 1 h at room temperature. Methanesulfonyl chloride (65 muL) was added and the reaction mixture was stirred for 20 h at room temperature. The reaction mixture was concentrated in vacuum, the residue was suspended in DMF (5 mL) , carbazaic acid methyl ester (216 mg) was added and the reaction mixture was stirred for 20 h at room temperature. Water was added and the mixture was 2x extracted with MTB-ether. The combined organic layer was washed 3x with water, washed with brine, dried over magnesium sulfate and concentrated in vacuum. The residue was purified by column chromatography (silica 60, <n="460"/>hexane/ethyl acetate = 2:1, Rf = 0.15) to afford 37 mg of the compound 14 of the present invention of the formulaas a white solid. 1H-NMR (CDCl3, TMS) delta (ppm) : 3.82 (3H, s) , 6.66 (IH, br s) ,7.08 (IH, s), 7.39 (IH, dd, J = 8 Hz, ' 5 Hz) , 7.57 (IH, s) , 7.86 (IH, dd, J = 8 Hz, 2 Hz), 8.47 (IH, dd, J = 5 Hz, 2 Hz), 9.40 (IH, s), 10.71 (IH, s) . |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
57.3% | 0.72 g (2.4 mmol) of 3-bromo-1- (3-chloropyridin-2-yl) -5-pyrazolecarboxylic acid,0.46 g (2.4 mmol) of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI), 0.32 g (2.4 mmol) of 1-hydroxybenzotriazole (HOBt), 10mL N, N-dimethylformamide (DMF), stirred at room temperature for 30min, then added 0.38g (2.0mmol) of 4-methyl-5-ethoxycarbonylthiazole-2-amine, 0.5mL of triethylamine, 120 C The reaction was stirred for 4.0h, and the solid was precipitated by pouring into water. The crude product was purified by column chromatography to obtain N-[(4-methyl-5-ethoxycarbonylthiazol-2-yl)]-3-bromo-1-(3-chloropyridin-2-yl)-5-pyrazolecarboxamide (Ia), mp 220-222 C, yield 57.3%; |
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