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CAS No. : | 885520-26-3 | MDL No. : | MFCD07781445 |
Formula : | C7H4F2N2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | IVIBUEIPYSZJAI-UHFFFAOYSA-N |
M.W : | 154.12 | Pubchem ID : | 24728423 |
Synonyms : |
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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 |
---|---|---|
2.18 g | With iodine; potassium hydroxide; In N,N-dimethyl-formamide; at 20℃; for 2h; | Example 101.2-(4,6-Difiuoro-l-methyl-lH-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylisopropylamideStep 14 ,6 -Difluoro -3 -iodo - 1 H-indazo leTo a solution of 4,6-difluoro-l H-indazo le (1.16 g, 7.53 mmol) in DMF (60 ml) at room temperature was added potassium hydroxide ( 1.27 g, 22.6 mmol) and iodine (2.87 g, 11.3 mmol). The maroon reaction mixture was stirred at room temperature for 2 h then quenched with 10% aqueous Na2S203 and diluted with water. The mixture was extracted with EtOAc (2x). The combined organics were washed with water, sat LiCl, and sat NaCl, then dried over MgSC^ and concentrated to afford 2.18 g of 4,6-difluoro-3-iodo-l H-indazo le as a light brown solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
47% | Example 88.2-(4,6-Difluoro-l-methyl-lH-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2- (3-cyano-azetidin-l -yl)-l -methyl-2-oxo-ethyl]-amideStep 14,6-Difluoro-lH-indazoleTo a solution of 2,4,6-trifluorobenzaldehyde (0.80 g, 5.0 mmol) in 1 ,2-dimethoxyethane (10 mL) were added potassium carbonate (1.04 g, 7.5 mmol) and O-methylhydroxylamine hydrochloride (438 mg, 5.25 mmol). The reaction mixture was heated at 50C for 5 h then cooled to room temperature and filtered, rinsing with dichloromethane. The filtrate was concentrated. The residue was dissolved in 1 ,2-dimethoxyethane (10 mL) and hydrazine (0.17 mL, 5.5 mmol) was added. The reaction mixture was heated at 100C for 1.5 h. Additional hydrazine (0.17 mL, 5.5 mmol) was added and heating was continued for 30 min. Thereaction was cooled to room temperature, poured into water, and extracted with ethyl acetate. The organic layer was washed with sat LiCl and brine then dried over MgS04 and concentrated. The residue was purified by silica gel chromatography with 20% to 50% EtO Ac/heptane to provide 358 mg (47%) of 4,6- difluoro- lH-indazole as a light yellow solid. 1H NMR (DMSO-d6, 300 MHz): ? (ppm) 13.47 (br. s., 1H), 8.19 (s, 1H), 7.22 (d, J=9.1 Hz, 1H), 6.96 (td, J=10.0, 1.9 Hz, 1H). |
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