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CAS No. : | 886365-25-9 | MDL No. : | MFCD07375112 |
Formula : | C8H8BrNO3 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | HSPQMLCPRUPXSD-UHFFFAOYSA-N |
M.W : | 246.06 | Pubchem ID : | 46311225 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P280-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302 | 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 |
---|---|---|
77% | With silver (II) carbonate In toluene at 50℃; for 15 h; | To a solution of methyl 5-bromo-2-hydroxy-pyridine-4-carboxylate (20.0 g, 86.2 mmol) in toluene (200 mL) was added silver carbonate (30.9 g, 112.1 mmol) and iodomethane (18.4 g, 129.3 mmol). The reaction mixture was stirred at 50 °C for 15 h and filtered. The filtrate was concentrated under reduced pressure. The residue was purified bycolumn chromatography (silica gel, 100-200 mesh, 0 to 30percent ethyl acetate in petroleum ether) to give methyl 5-bromo-2-methoxy-pyridine-4-carboxylate (16.4g, 77percent) as a white solid, used as is in the next step. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
14.9 g | at 0℃; for 1 h; | To a solution of 5-bromo-2-methoxy-pyridine-4-carbaldehyde (23.5 g, 108.8 mmol) in MeOH (100 mL) were successively added a solution of I2 (35.9 mg, 141.4 mmol) in MeOH (75 mL) and a solution of KOH (15.9 g, 282.8 mmol) in MeOH (75 mL) at 0 °C. The resulting mixture was stirred for 1 hr at 0 °C and the reaction was quenched with saturated aqueous NaHS03. The resulting mixture was diluted with DCM (400 mL). The separated organic phase was washed with H20 (150 mL) and brine (150 mL), dried over anhydrous Na2S04 and concentrated in vacuo. The residue was purified by flash column (eluting with PE:EA=20: 1, v:v) to give methyl 5-bromo-2-methoxy-pyridine-4-carboxylate (14.9 g) as a light yellow solid. |
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