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CAS No. : | 25016-02-8 | MDL No. : | MFCD02093683 |
Formula : | C8H7NO4 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | YWVSKFXYEWMHEO-UHFFFAOYSA-N |
M.W : | 181.15 | Pubchem ID : | 90685 |
Synonyms : |
|
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | |
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 |
---|---|---|
76% | With diisobutylaluminium hydride; In tetrahydrofuran; toluene; at -78 - 20℃; for 1h;Inert atmosphere; | A solution of Intermediate 312B (410 mg, 2.263 mmol) in Toluene (11.500 mL) and THF (11.50 mL) was cooled to -78 C under an atmosphere of N2. DIBAL-H (1.0 Min Toluene) (3.40 mL, 3.40 mmol) was then added to the cooled solution dropwise. After the initial bubbling had subsided, the reaction mixture was allowed to thaw to room temperature. After 1 h, the reaction mixture was cooled to 0 C and quenched with 1.0 M HC1. The resulting suspension was stirred vigorously for 45 mm to fully cleave the aluminate complex. The mixture was then diluted with EtOAc and extracted. Theorganic phase was washed with brine, dried over MgSO4, filtered and concentrated. The resulting crude product was purified by ISCO (80g, 0-100% EtOAc/Hexanes, 33 mm. Product at 50%) to give Intermediate 312C (370 mg, 1.717 mmol, 76% yield) as a light yellow solid. LC-MS. Method H, RT = 0.68 mm, MS (ESI) m/z: 184.0 (M+H). ?H NMR (4001V11{z, CHLOROFORM-d) 8.29 (d, J=2.9 Hz, 1H), 8.21 (dd, J9.0, 2.6 Hz,1H), 6.94 (d, J=9.0 Hz, 1H), 4.75 (d, J=6.4 Hz, 2H), 3.97 (s, 3H), 2.07 (t, J=6.4 Hz, 1H). |
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