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CAS No. : | 629-03-8 | MDL No. : | MFCD00000272 |
Formula : | C6H12Br2 | Boiling Point : | - |
Linear Structure Formula : | (C3H6Br)2 | InChI Key : | SGRHVVLXEBNBDV-UHFFFAOYSA-N |
M.W : | 243.97 | Pubchem ID : | 12368 |
Synonyms : |
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Signal Word: | Danger | Class: | 9 |
Precautionary Statements: | P273-P280-P305+P351+P338 | UN#: | 3082 |
Hazard Statements: | H302+H332-H317-H318-H411 | Packing Group: | Ⅲ |
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 |
---|---|---|
A solution of (5R)-5-(2, 2-DIMETHYL4H-1, 3-BENZODIOXIN-6-YL)-1, 3-OXAZOLIDIN-2-ONE (2. 00g) (WO 02/066422) in DMF (60ML) under nitrogen was treated with sodium hydride (60% dispersion in mineral oil, 385mg) and the mixture stirred at 20 for 30min. A solution of 1,6-dibromohexane (4. 94MOI) was added and the mixture was stirred at 20 for 3h. Phosphate buffer solution (pH 6.5, 30MI) and water (150ML) were added and the mixture was extracted with ET20. The extract was washed with water and dried (Na2SO4). The solvent was evaporated in vacuo and the residue purified by flash chromatography on silica gel. Elution with DCM then MEOH-DCM (1: 50) gave the title compound (2. 565G). LCMS RT = 3. 71 min. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
85% | In acetonitrile; for 24h;Reflux; Inert atmosphere; | 1,6-Dibromohexane (10.00 g, 42 mmol) was dissolved in anhydrous acetonitrile (10 mL) and introduced into a three-neck round-bottom flask. After the solution was heated gently to reflux, a solution of 1 (0.50 g, 2.80 mmol) in anhydrous acetonitrile (5 mL) was added dropwise under N2 atmosphere. The reaction mixture was stirred for 24 h at reflux and then cooled to room temperature. The solvent was removed to give a residue, which was purified by washing with anhydrous diethyl ether (35 mL), and concentrated under reduced pressure. The residue was dried under vacuum to afford 2 as a puce oil (1.01 g,85 percent). deltaH (CDCl3, 400 MHz) 10.32 (1H, s), 7.62 (1H, s), 7.50 (1H, s), 4.40 (2H, t, J 7.2), 4.34 (2H, t, J 7.6), 3.43?3.40 (4H, m), 2.03?1.84 (6H, m), 1.51?1.23 (12H, m), 0.87 (3H, t, J 6.8). deltaC (CDCl3, 100 MHz) 136.3, 122.1, 121.8, 49.9, 49.6, 33.7, 32.3,32.1, 31.5, 30.1, 30.0, 28.9, 27.2, 26.1, 25.1, 22.4, 14.0. m/z (ESI) 345 ([M]+). m/z 345.1733. HRMS (ESI) Anal. Calc. for C17H32BrN2 ([M]+) 345.1728. |