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CAS No. : | 19983-44-9 | MDL No. : | |
Formula : | C8H5NO4S | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | ZRRGOUHITGRLBA-UHFFFAOYSA-N |
M.W : | 211.19 | Pubchem ID : | 2779853 |
Synonyms : |
STAT3 Inhibitor V
|
Chemical Name : | 6-Nitrobenzo[b]thiophene 1,1-dioxide |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-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 |
---|---|---|
75% | With palladium 10% on activated carbon; hydrogen; In methanol; ethanol; for 12.0h; | Reference Example 119 2,3-Dihydro-1-benzothiophene-6-amine 1,1-dioxide To a suspension of <strong>[19983-44-9]6-nitro-1-benzothiophene 1,1-dioxide</strong> (2.02 g) in ethanol (200 mL) and methanol (60 mL) was added 10% palladium carbon (50% containing water, 265 mg), and the mixture was stirred under a hydrogen atmosphere for 12 hr. The reaction mixture was filtrated, and the filtrate was concentrated under reduced pressure. The residue was recrystallized from ethyl acetate to give the title compound as a white solid (yield 1.31 g, 75%). 1H-NMR (CDCl3)delta: 3.25 (2H, t, J=6.9 Hz), 3.44-3.49 (2H, m), 3.93 (2H, brs), 6.84-6.87 (1H, m), 6.94-6.95 (1H, m), 7.12 (1H, d, J=8.1 Hz). |
palladium-carbon; In methanol; ethanol; | Reference Example 119 2,3-Dihydro-1-benzothiophene-6-amine 1,1-dioxide To a suspension of <strong>[19983-44-9]6-nitro-1-benzothiophene 1,1-dioxide</strong> (2.02 g) in ethanol (200 mL) and methanol (60 mL) was added 10% palladium carbon (50% containing water, 265 mg), and the mixture was stirred under a hydrogen atmosphere for 12 hr. The reaction mixture was filtrated, and the filtrate was concentrated under reduced pressure. The residue was recrystallized from ethyl acetate to give the title compound as a white solid (yield 1.31 g, 75%). 1H-NMR (CDCl3)delta: 3.25 (2H, t, J=6.9 Hz), 3.44-3.49 (2H, m), 3.93 (2H, brs), 6.84-6.87 (1H, m), 6.94-6.95 (1H, m), 7.12 (1H, d, J=8.1 Hz). | |
With hydrogen; acetic acid;palladium 10% on activated carbon; In ethyl acetate; | A solution of <strong>[19983-44-9]6-nitro-1-benzothiophene 1,1-dioxide</strong> (1.04 g) in acetic acid (50 ml) and ethyl acetate (50 ml) was hydrogenated(10% palladium on carbon (130 mg, 50% wet). The catalyst was removed by filtration and washed with ethyl acetate. The filtrate and washings were evaporated under reduced pressure to give the title compound (1.1g). LCMS RT=1. 50 min |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
84% | With sulfuric acid; nitric acid; for 0.5h; | Reference Example 118 6-Nitro-1-benzothiophene 1,1-dioxide Nitric acid (10 mL) was slowly added to sulfuric acid (10 mL) at 0C, and the mixture was stirred at the same temperature for 10 min. To this solution was slowly added 1-benzothiophene 1,1-dioxide (3.99 g) at 0C, and the mixture was further stirred at the same temperature for 30 min. The reaction mixture was poured into ice water, and the mixture was extracted with ethyl acetate. The extract was washed twice with water, saturated aqueous sodium hydrogencarbonate solution and saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was recrystallized from ethyl acetate-hexane to give the title compound as a pale-yellow solid (yield 4.26 g, 84%). 1H-NMR (CDCl3)delta: 7.00 (1H, d, J=6.9 Hz), 7.33 (1H, dd, J=1.2, 6.9 Hz), 7.58 (1H, d, J=8.4 Hz), 8.47 (1H, dd, J=1.8, 8.4 Hz), 8.55-8.57 (1H, m). |
With sulfuric acid; nitric acid; | Reference Example 118 6-Nitro-1-benzothiophene 1,1-dioxide Nitric acid (10 mL) was slowly added to sulfuric acid (10 mL) at 0C, and the mixture was stirred at the same temperature for 10 min. To this solution was slowly added 1-benzothiophene 1,1-dioxide (3.99 g) at 0C, and the mixture was further stirred at the same temperature for 30 min. The reaction mixture was poured into ice water, and the mixture was extracted with ethyl acetate. The extract was washed twice with water, saturated aqueous sodium hydrogencarbonate solution and saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was recrystallized from ethyl acetate-hexane to give the title compound as a pale-yellow solid (yield 4.26 g, 84%). 1H-NMR (CDCl3)delta: 7.00 (1H, d, J=6.9 Hz), 7.33 (1H, dd, J=1.2, 6.9 Hz), 7.58 (1H, d, J=8.4 Hz), 8.47 (1H, dd, J=1.8, 8.4 Hz), 8.55-8.57 (1H, m). |