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CAS No. : | 4027-57-0 | MDL No. : | MFCD00233455 |
Formula : | C7H10N2O2 | Boiling Point : | No data available |
Linear Structure Formula : | C3H2N2(CH3)COOCH2CH3 | InChI Key : | BOTXQJAHRCGJEG-UHFFFAOYSA-N |
M.W : | 154.17 | Pubchem ID : | 77645 |
Synonyms : |
|
Chemical Name : | Ethyl 5-methylpyrazole-3-carboxylate |
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H315-H319-H335 | Packing Group: | |
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 |
---|---|---|
79% | With N-Bromosuccinimide In N,N-dimethyl-formamide at 20℃; for 16 h; | A mixture of ethyl 5-methyl-1H-pyrazole-3-carboxylate (4.0 g, 25.95 mmol) and NBS (5.08 g, 28.54 mmol) in N,N-dimethylformamide (15 mL) was stirred at room temperature for 16 h. The mixture was taken up in EtOAc (200 mL) and the organics were washed with saturated brine solution. The organics were then separated and dried (Na2SO4) before concentrated to dryness. The crude was then purified by flash column chromatography (PE/EA=3/2) to give ethyl 4-bromo-5-methyl-1H-pyrazole-3-carboxylate (4.8 g, 79percent yield) as a white solid. LCMS (ESI): [M+H]+=234.9. |
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