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CAS No. : | 886779-69-7 | MDL No. : | MFCD08686626 |
Formula : | C10H17F3N2O2 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | WCGKHZHOGLVVPU-UHFFFAOYSA-N |
M.W : | 254.25 | Pubchem ID : | 66599850 |
Synonyms : |
|
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H302-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 |
---|---|---|
90% | In dichloromethane; at 20℃; for 3h; | To a solution of <strong>[131922-05-9]2-(trifluoromethyl)piperazine</strong> (135 mg, 0.876 mmol) in DCM (6 ml) were added di-tert-butyl dicarbonate (0.224 ml, 0.963 mmol) and the resulting mixture was stirred at RT for 3 h, then concentrated and the residue was purified via silica gel chromatography (0 - 100 % EtOAc in hexanes) to give tert-butyl 3 -(trifluoromethyl)piperazine-l -carboxylate (200 mg, 0.787 mmol, 90 % yield) as a pale yellow solid. MS (ES+) C10H17F3N2O2 requires: 254, found: 155 [M+H]+- Boc group. |
3.2 g | In tetrahydrofuran; at 20℃; for 14h; | Into a 250-mL round-bottom flask, was placed <strong>[131922-05-9]2-(trifluoromethyl)piperazine</strong> (4.00 g, crude), THF (100.00 mL), Boc2O (8.50 g, 38.947 mmol, 1.50 equiv). The resulting solution was stirred for 14 hr at room temperature. The resulting mixture was concentrated. The residue was applied onto a silica gel column and purified with ethyl acetate/petroleum ether (1:1). This resulted in 3.2 g (48.50%) of tert-butyl 3-(trifluoromethyl)piperazine-1-carboxylate as a white solid. H-NMR: (300 MHz, Chloroform-d) δ 4.13 (d, J = 16.2 Hz, 1H), 3.94 - 3.74 (m, 1H), 3.24 (dtd, J = 10.2, 6.6, 3.0 Hz, 1H), 3.16 - 2.87 (m, 3H), 2.78 (td, J = 12.7, 11.7, 4.8 Hz, 1H), 2.07 (s, 1H), 1.49 (s, 9H). |
3.2 g | In tetrahydrofuran; at 20℃; for 14h; | Into a 250-mL round-bottom flask, was placed <strong>[131922-05-9]2-(trifluoromethyl)piperazine</strong> (4.00 g, crude), THF (100.00 mL), Boc2O (8.50 g, 38.947 mmol, 1.50 equiv). The resulting solution was stirred for 14 hr at room temperature. The resulting mixture was concentrated. The residue was applied onto a silica gel column and purified with ethyl acetate/petroleum ether (1:1). This resulted in 3.2 g (48.50%) of tert-butyl 3-(trifluoromethyl)piperazine-1-carboxylate as a white solid. H-NMR: (300 MHz, Chloroform-d) δ 4.13 (d, J = 16.2 Hz, 1H), 3.94 - 3.74 (m, 1H), 3.24 (dtd, J = 10.2, 6.6, 3.0 Hz, 1H), 3.16 - 2.87 (m, 3H), 2.78 (td, J = 12.7, 11.7, 4.8 Hz, 1H), 2.07 (s, 1H), 1.49 (s, 9H). |
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