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CAS No. : | 5417-82-3 | MDL No. : | MFCD00001852 |
Formula : | C7H8N2O | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | BOSVWXDDFBSSIZ-UHFFFAOYSA-N |
M.W : | 136.15 | Pubchem ID : | 79450 |
Synonyms : |
|
Signal Word: | Danger | Class: | 6.1 |
Precautionary Statements: | P261-P264-P270-P271-P280-P301+P312+P330-P302+P352+P312-P304+P340+P312-P305+P351+P338-P332+P313-P337+P313-P403+P233-P405-P501 | UN#: | 3439 |
Hazard Statements: | H301-H311-H331-H315-H319-H335 | Packing Group: | Ⅲ |
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 |
---|---|---|
4.7 g (54%) | With sodium methylate; In ethanol; | (e) 1-(3-Tetrahydrofuranyl)-3-methyl-5-amino-1H-pyrazole-4-carbonitrile A mixture of 3-tetrahydrofuranylhydrazine hydrochloride (6.2 g, 0.045 mol), sodium methoxide (2.4 g, 0.045 mol) and ethanol (70 ml) was refluxed under argon for 10 minutes. The reaction mixture was cooled to room temperature and 1-ethoxyethylidene malononitrile (6.1 g, 0.045 mol) was added. The reaction mixture was heated to reflux and stirred for 21 hours. The reaction was cooled and the solvent was removed in vacuo. The residue was recrystallized from water to afford 4.7 g (54%) of 1-(3-tetrahydrofuranyl)-3-methyl-5-amino-1H-pyrazole-4-carbonitrile as yellow crystals, m.p. 134-135 C. when dried at 90 C. in high vacuum. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine; In ethanol; at 70℃; for 15h; | To a soin. of (4-fluorophenyl)- hydrazine hydrochloride (30.0 g, 185 mmol) in EtOH (100 mE) was added Et3N (56.0 g, 554 mmol) and 2-(ethoxymethyiene)rnaiononitrile (23.66 g, 194 mmoi). After the addition was complete, the reaction mixture was stirred 70C for 15 h. The reaction mixture was cooled to rtand concentrated in vacuo. Then the mixture was extracted with EtOAc (2xiOOmL). The combined organic layer was washed with brine, arid then dried over Na2SO4. filtered and concentrated in vacuo to give crude product. The crude product was purified by silica gel column chromatography (PE/EtOAc 10:1 to 5:1) to give the title compound. |
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