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CAS No. : | 39150-45-3 | MDL No. : | MFCD00014783 |
Formula : | C6H6Br2N2O2S | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | DLXJPWSYRLLYSV-UHFFFAOYSA-N |
M.W : | 330.00 | Pubchem ID : | 3084733 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313 | UN#: | N/A |
Hazard Statements: | H315-H319 | 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 |
---|---|---|
With sulfuric acid; In water; at 170℃; for 3.0h; | To a mixture of 50.0 g sulfanilamide, 850 mL water and 200 mL 48% HBr solution, 90.0 g sodium perborate was added at 85 C. The mixture was stirred at 80-85 C for 30 min and then was cooled to room temperature and filtered. The residue was washed to be neutral by water. The solid was desulfonated by reacting with 70% sulfuric acid solution for 3 h under reflux. Crude product was obtained by steam distillation and further purified by recrystallization in ethanol. 1H NMR (500 MHz, CDCl3, delta in ppm): 7.35-7.40 (d, 2H, Ar-Hm), 6.5 (t, 1H, Ar-Hp). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | With hydrogen bromide; dihydrogen peroxide; at 20℃; for 5.0h; | Sulfanilamide (0.43g, 0.0025mol) was stirred in 15mL of 6N halogen acid (0.08mol) at room temperature, and 2mL of 30% hydrogen peroxide (0.02mol) was slowly added. After 5h, the product was filtered and recrystallized from ethanol. White solid. Yield: 62%. 1H NMR (DMSO-d6, 400MHz): delta 7.79 (s, 2H, ArH), 7.26 (s, 2H, SO2NH2), 6.11 (s, 2H, NH2). 13C NMR (DMSO-d6, 100MHz): delta 145.8, 132.7, 129.5, 106.1. |
With sodium perborate; hydrogen bromide; at 80 - 90℃; | To a mixture of 50.0 g sulfanilamide, 850 mL water and 200 mL 48% HBr solution, 90.0 g sodium perborate was added at 85 C. The mixture was stirred at 80-85 C for 30 min and then was cooled to room temperature and filtered. The residue was washed to be neutral by water. The solid was desulfonated by reacting with 70% sulfuric acid solution for 3 h under reflux. Crude product was obtained by steam distillation and further purified by recrystallization in ethanol. 1H NMR (500 MHz, CDCl3, delta in ppm): 7.35-7.40 (d, 2H, Ar-Hm), 6.5 (t, 1H, Ar-Hp). |
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