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CAS No. : | 872041-86-6 | MDL No. : | MFCD07368243 |
Formula : | C5H5BFNO2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | FVEDGBRHTGXPOK-UHFFFAOYSA-N |
M.W : | 140.91 | Pubchem ID : | 44717403 |
Synonyms : |
|
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 |
---|---|---|
84.82% | With pyridine; pyridine N-oxide; oxygen; copper diacetate; In dichloromethane; at 20℃; for 48h; | To a mixture of compound 180(30000mg, 1 5Smmol) and 102(32762mg, 232mmol) in DCM (2OrnL). was added pyridine (367.02mg, 4.64mmol), Cu(OAc)2(561.83mg, 3.O9mmoi) and i oxidopyridin-i--iurn (442.21 mg, 4.6Smmol, 3.OOEq) in one portion at room temperature. The mixture was stirred at room temperature for 48 hours under 02 protected. LCMS showed thereaction was completed. The mixture was filtrated and the filtrate was concentrated in reduced pressure. The residue was dissolved in ethyl acetate (4OmL). The organic phase was washed with water (3OmLx2), saturated brine (3OmLxi), dried over anhydrous Na2SO4, filtered and concentrated in vacuum. The residue was purified by silica gel chromatography to afford product 206(380.00mg. yield: 84.82%).LCM: m/z, 2899M+H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
52.7% | With (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; caesium carbonate; In 1,4-dioxane; water; at 110.0℃; for 1.0h;Microwave irradiation; Sealed tube; | 5,7-Dichloro-3-methyl-pyrazolo[l,5-a]pyrimidine (190 mg, 938.52 mupiiotaomicron, 1 eq), (5-fluoro-3- pyridyl)boronic acid (138.86 mg, 985.45 muiotaetaomicron, 1.05 eq), Pd(dppf)Cl2 (68.67 mg, 93.85 muiotaetaomicron, 0.1 eq) and Cs2C03 (611.58 mg, 1.88 mmol, 2 eq) were taken up into a microwave tube in 1,4-dioxane (3 mL) and H20 (1 mL). The sealed tube was heated at 110 C for 1 h under microwave. The mixture was concentrated and water (10 mL) was added. The mixture was extracted with EtOAc (20 mL x 3). The combined organic layers were dried over Na2S04, filtered and concentrated to yield a residue which was purified on silica gel column chromatography (from PE/EtOAc = 1/0 to 10/3, TLC: PE/EtOAc = 3/1, Rf = 0.50) to yield 5-chloro-7-(5-fluoro-3-pyridyl)-3-methyl- pyrazolo[l,5-a]pyrimidine (130 mg, 494.92 mupiiotaomicron, 52.7% yield, 100.0%) purity) as a yellow solid. NMR (400 MHz, CDC13) delta ppm 8.97 (s, 1H), 8.69 (d, J = 2.7 Hz, 1H), 8.38-8.31 (m, 1H), 8.04 (s, 1H), 6.92 (s, 1H), 2.40 (s, 3H); ES-LCMS m/z 263.0, 265.0 [M+H]+. |
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