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CAS No. : | 449758-17-2 | MDL No. : | MFCD11044692 |
Formula : | C8H12N2O | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | IMZWSOSYNFVECD-UHFFFAOYSA-N |
M.W : | 152.19 | Pubchem ID : | 21866310 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P280-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302+H312+H332-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 |
---|---|---|
48% | With n-butyllithium; triisopropylborane; In tetrahydrofuran; hexane; at -78 - 20℃; for 5h; | To a cooled solution (-780C) of l-(tetrahydro-pyran-2-yl)-lH-pyrazole (7.6g,52mmol) in THF (5OmL), "BuLi (33mL, 2.5M in hexane, 82.5mmol) and triisopropyl borane (12.7mL, 55mmol) are added dropwise maintaining the temperature at -7O0C. The reaction mixture is stirred at -7O0C for one hour and then allowed to reach room temperature over 4 hours. After quenching the reaction with 2M HCl, the solvent is removed in vacuo and the pH is adjusted to pH 6 using IM NaOH. A precipitate is formed, collected by filtration and washed with toluene and petroleum ether. Trituration with ethyl acetate affords the target compound as a white solid (2.7g, 48percent), which is used in the next step without further purification. |
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