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CAS No. : | 571189-16-7 | MDL No. : | MFCD11849291 |
Formula : | C14H20N4O4 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | SUWKOEMQNOBJEQ-UHFFFAOYSA-N |
M.W : | 308.33 | Pubchem ID : | 11243758 |
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: |
* 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 |
---|---|---|
63.81% | With potassium carbonate; In dimethyl sulfoxide; at 100 - 110℃;Microwave irradiation; | A microwave vial was charged with <strong>[52092-47-4]5-chloro-2-nitropyridine</strong> (1 g, 6.31 mmol), 1 -boc-piperazine (1 .29g, 6.94mmol) and potassium carbonate (3.3ml_, 18.92mmol), which was suspended in DMSO (15ml_). The resulting mixture was irradiated for 1 hour at 100°C. After this time, the mixture had solidified. LC-MS showed the reaction had not gone to completion. The solid mixture was then transferred to a flask along with DMSO (5ml_) and heated to 1 10°C, at which point the solid mixture had melted. This was left heating overnight, after which LC-MS showed product formation and no starting material. Reaction was allowed to cool. The reaction mixture was then added to water and extracted with EtOAc (x3). The organics were then combined, washed with brine, dried over sodium sulfate, filtered and concentrated to dryness, affording an orange solid. Purification by flash column chromatography was then performed, (40g S1O2, eluting with 0-50percent EtOAc in heptane). The fractions containing product were combined and concentrated to dryness, affording tert-butyl 4-(6- nitro-3-pyridyl)piperazine-1 -carboxylate (1 .24g, 4.02mmol, 63.81 percent yield) as a bright orange/yellow solid. MS Method 2: RT: 1 .61 min, ES+ m/z 309.1 [M+H]+ H NMR (400MHz, CDC ) delta/ppm: 8.10-8.13 (d, J=9.1 Hz, 1 H), 8.06-8.07 (d, J=3.0Hz, 1 H), 7.12-7.16 (dd, J=9.2, 3.0Hz, 1 H), 3.55-3.59 (m, 4H), 3.36-3.41 (m, 4H), 1 .42 (s, 9H). |
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