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CAS No. : | 203661-69-2 | MDL No. : | MFCD12198552 |
Formula : | C13H21NO3 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | SIMIIXFMGJYGLR-UHFFFAOYSA-N |
M.W : | 239.31 | Pubchem ID : | 11195798 |
Synonyms : |
|
Chemical Name : | tert-Butyl 2-oxo-7-azaspiro[3.5]nonane-7-carboxylate |
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: |
* 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 |
---|---|---|
Synthesis of 2-(2,3-difluorophenyl)-7-azaspiro[3.5]nonane hydrochloride; To a solution of tert-butyl 2-oxo-7-azaspiro[3.5]nonane-7-carboxylate (2.48 g, 10.36 mmol) in THF (50 mL) at 0° C. was added 2,3-difluorophenylmagnesium bromide (prepared from stirring <strong>[38573-88-5]1-<strong>[38573-88-5]bromo-2,3-difluorobenzene</strong></strong> (4.00 g, 20.73 mmol) and isopropyl magnesium chloride (15.7 mL, 20.4 mmol) in THF (10 mL) at r.t. for 14 hrs). After 1 h, the reaction was quenched with saturated ammonium chloride and extracted with ethyl acetate. The organic layers were dried over sodium sulfate, filtered, and concentrated to give the crude alcohol as a pale yellow oil. A solution of the crude alcohol and triethylsilane (7.0 mL, 44.0 mmol) in methylene chloride (50 mL) was treated with borontrifluoride diethyl etherate (2.56 mL, 20.7 mmol) and trifluoroacetic acid (3.9 mL, 52.0 mmol) at 0° C. After 1 h at 0° C., the reaction was quenched with saturated sodium bicarbonate and extracted with dichloromethane. The organics were washed with brine, dried over magnesium sulfate, filtered, and concentrated. The oil was diluted with ether and treated with 4N HCl/dioxane (4 mL). The precipitate was filtered and dried to give the title compound as a white solid (1.5 g, 61percent). |
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