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CAS No. : | 381233-96-1 | MDL No. : | MFCD06659000 |
Formula : | C5H4BrIN2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | XPERZSKJGNUSHI-UHFFFAOYSA-N |
M.W : | 298.91 | Pubchem ID : | 1516508 |
Synonyms : |
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Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | 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 |
---|---|---|
With tetrakis(triphenylphosphine) palladium(0); caesium carbonate; In 1,2-dimethoxyethane; water; at 130 - 150℃; for 4.5h;Microwave irradiation; | Pd(PPh3)4 (190.0 mg, 0.17 mmol) was added to suspension of 5-bromo-3-iodopyridin-2-amine (500.0 mg, 1.67 mmol), <strong>[1217501-27-3](1-(tert-butoxycarbonyl)-3-methyl-1H-pyrazol-5-yl)boronic acid</strong> (755.0 mg, 3.34 mmol), Cs2CO3 (1600.0 mg, 5.01 mmol), H2O (3.0 mL) and DME (12.0 mL). The reaction mixture was allowed to react in microwave under conditions of 100 W and 130 C. for 2 hours and 30 minutes, followed by 100 W and 150 C. for 2 hours and then cooled to room temperature. Water was added to the reaction mixture, and it was extracted 2 times with EtOAc. The organic layer was dried over anhydrous Na2SO4, filtered and then concentrated under reduced pressure. The residue was purified by column chromatography (MeOH:DCM=1:40) on silica. The fractions containing the product were collected and evaporated to obtain brown solid compound which is the mixture of 5-bromo-3-(3-methyl-1H-pyrazol-5-yl)pyridin-2-amine and 9-bromo-2-methylpyrazolo[1,5-c]pyrido[3,2-e]pyrimidin-5-ol (78.0 mg). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
58% | With bis-triphenylphosphine-palladium(II) chloride; sodium carbonate; In ethanol; toluene; at 90℃; for 3h; | Intermediate C1 (2881) 5-Bromo-3-[1-(2,2,2-trifluoro-ethyl)-1H-pyrazol-4-yl]-pyridin-2-ylamine (2882) (2883) Sodium carbonate (2.76 ml of a 2M solution, 5.52 mmol) was added to a mixture of 5-bromo- 3-iodopyridin-2-amine (0.55 g, 1.84 mmol), 4-(4,4,5,5-tetramethyl-1 ,3,2-dioxoborolan-2-yl)-1- (2,2,2-trifluoroethyl)-1 H-pyrazole (0.61 g, 2.21 mmol) (Intermediate D1) and Pd(PPh3)2CI2 (0.065 g, 0.092 mmol) in toluene (7 ml) and ethanol (3.5 ml). The mixture was heated at 90C. After 3h the reaction was complete by LCMS. The reaction mixture was diluted with EtOAc and washed with brine. The organic extract was dried over MgS04 and the crude product absorbed on silica. Chromatography on silica, eluting with EtOAc, gave the product as a grey solid (0.36 g, 58 %); (2884) LCMS: Rt 1.00 mins; MS m/z 321.3 [M+H]+ ; Method 2minLC_v003 (2885) 1H NMR (400MHz, CDCI3) 8.15 (1 H, br s), 7.82 (1 H, s), 7.78 (1 H, s), 7.55 (1 H, s), 4.7 (2H, m) |
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