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CAS No. : | 15017-52-4 | MDL No. : | MFCD03412241 |
Formula : | C7H5BrFNO2 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | OAMKMERAYXDUEW-UHFFFAOYSA-N |
M.W : | 234.02 | Pubchem ID : | 10868208 |
Synonyms : |
|
Signal Word: | Danger | Class: | 8 |
Precautionary Statements: | P260-P264-P280-P301+P330+P331-P303+P361+P353-P304+P340-P305+P351+P338-P310-P363-P405-P501 | UN#: | 3261 |
Hazard Statements: | H314 | Packing Group: | Ⅱ |
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 |
---|---|---|
80% | In acetonitrile; at 20℃; for 4h; | 34A: 2-(4-fluoro-3-nitrophenyl)acetonitrile To a solution of 4-(bromomethyl)-l-fluoro-2-nitrobenzene (1 g, 4.27 mmol) in acetonitrile (5 mL) was added tetraethylammonium cyanide (0.801 g, 5.13 mmol). The resulting deep green solution was stirred at RT for 4 h. The solvent was then removed in vacuo, purification via flash chromatography gave 34A (light yellow oil, 617 mg, 3.43 mmol, 80 % yield). LC-MS Anal. Calc'd for C8H5F 2O2 180.03, did not show paretn ion, Tr = 0.74 min (Method B). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
59% | To a solution of diethyl N-Boc-aminomalonate (1.5 g, 5.45 mmol, 1 eq) in freshly distilled DMF (20 mL) was added sodium hydride (60% in oil, 0.261 g, 1.2 eq) portionwise. Then, 4-fluoro-3-nitrobenzyl bromide (1.53 g, 1.2 eq) was added and the solution stirred at room temperature during one day. The reaction mixture was hydrolysed with 70 mL of water and extracted with 3*50 mL of CH2Cl2. The combined organic layers were dried over MgSO4 and the solvent removed under vacuum. Crude product was purified by flash chromatography on silica gel with petroleum ether/ethyl acetate (9/1) to afford the diester as yellow oil in 59 % yield (1.38 g). 1H NMR (300 MHz, CDCl3) δ 1.30 (t, 3JHH= 7.5 Hz, 6H, H2’), 1.48 (s, 9H, H14), 3.68 (s, 2H, H4), 4.17-4.37 (m, 4H, H1’), 5.76 (br s, 1H, H11), 7.20 (dd, 3JHF= 10.4 Hz, 3JHH = 8.6 Hz, 1H, H9), 7.30-7.35 (m, 1H, H6), 7.77 (dd, 3JHH =7.3, 4JHF = 2.2 Hz, 1H, H10). 13C NMR (75.5 MHz, CDCl3) δ 14.0 (C2’), 28.1 (C14), 37.2 (C4), 62.9 (C1’), 66.8 (C2), 80.8 (C13), 118.2 (d, 2JCF = 21.4 Hz, C9), 127.3 (C6), 132.6 (C5), 136.8 (d, 3JCF = 7.7 Hz, C10), 137.1 (d, 2JCF = 9.2 Hz, C7), 154.0 (C12), 154.8 (d, 1CF = 264,1 Hz, C8), 167.1 (C1+C3). 19F NMR (CDCl3) δ -119.91. HRMS (ESI) calculated for C19H25N2O8FNa [M+Na+] 451.1493; found 451.1502. IR (cm-1) ν 3436, 2981, 1730, 1713, 1538, 1157. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
47% | With 18-crown-6 ether; potassium iodide; In N,N-dimethyl-formamide; at 20℃; | A mixture of 4-(bromomethyl)-1 -fluoro-2-nitrobenzene (18 g, 76.9 mmol), KCN (10 g, 153.8 mmol), Kl (1 .3 g, 7.69 mmol) and 18-Crown-6 (10 g, 38.5 mmol) in DMF (100 mL) was stirred at r.t. overnight. The resulting mixture was partitioned between EtOAc and H20. The organic layer was washed with brine, dried over Na2S04, filtered and concentrated to give the crude product which was purified by flash chromatography (silica gel, 0-30% EtOAc in PE) to afford the title compound (6.6 g, 47% yield). LCMS (ESI) m/z calcd for C8H5FN202: 180.03. Found: 181 .37 (M+1)+. |
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