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CAS No. : | 5334-40-7 | MDL No. : | MFCD00090899 |
Formula : | C4H3N3O4 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | ZMAXXOYJWZZQBK-UHFFFAOYSA-N |
M.W : | 157.08 | Pubchem ID : | 219739 |
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: |
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* 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 |
---|---|---|
8.62 g | With potassium carbonate In N,N-dimethyl-formamide at 20℃; for 16 h; Cooling with ice | A) Methyl 1-methyl-4-nitro-1H-pyrazole-5-carboxylate To a suspension of 4-nitro-1H-pyrazole-3-carboxylic acid (37 g) and potassium carbonate (97.6 g) in DMF (600 mL), dimethyl sulfate (71.2 g) was added dropwise under ice cooling, and the mixture was stirred at room temperature for 16 hours. The reaction mixture was poured to water, followed by extraction with ethyl acetate. The extract was dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/petroleum ether) to obtain the title compound (8.62 g). 1H NMR (400 MHz, CDCl3) δ 4.02 (3H, s), 4.03 (3H, s), 8.01 (1H, s). |
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