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Chemical Structure| 398456-87-6 Chemical Structure| 398456-87-6

Structure of 398456-87-6

Chemical Structure| 398456-87-6

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Product Details of [ 398456-87-6 ]

CAS No. :398456-87-6
Formula : C7H7FO3S
M.W : 190.19
SMILES Code : CS(=O)(=O)C1=CC(F)=C(O)C=C1
MDL No. :MFCD09264549

Safety of [ 398456-87-6 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H315-H319-H335
Precautionary Statements:P261-P264-P271-P280-P302+P352-P304+P340-P305+P351+P338-P312-P362-P403+P233-P501

Application In Synthesis of [ 398456-87-6 ]

* 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.

  • Downstream synthetic route of [ 398456-87-6 ]

[ 398456-87-6 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 20951-14-8 ]
  • [ 398456-87-6 ]
YieldReaction ConditionsOperation in experiment
94% With water; hydrogen bromide; acetic acid; for 24.0h;Heating / reflux; 3. Preparation of 2-Fruoro-(4-methylsulfonvDphenol 2020463; Carried out over two equal batches. A mixture of 2-fluoro-l-methoxy-4- (methylsulfonyl)benzene 2009330 (2.00 kg, 9.82 mol) in 48% aqueous hydrogen bromide (6 L) and 33% hydrogen bromide in acetic acid (3 L) was heated at reflux for 24 h in a 20 L flange pot equipped with an overhead stirrer, condenser, and scrubber. The reaction <n="13"/>mixture was then allowed to cool to room temperature and was concentrated under reduced pressure to give a dark oil, which solidified upon standing. The resultant off- white solid was taken up in toluene (7 L) and the mixture was heated at reflux to azeotrope off water. Once collection of water had ceased, the mixture was cooled to 6O0C and an oil was decanted from the toluene. This oil was then stirred with toluene (1 L) until a precipitate formed. The resultant solid was collected by filtration, washed with toluene and hexane, dried under reduced pressure, and then allowed to form a slurry with hexane (3.5 L). The solid was once again collected by filtration, washed with hexane (1 L) and dried under reduced pressure to give 2-fiuoro-(4-methylsulfonyl)phenol 2020463 (1.76 kg, 94%) as an off-white solid, mp 91-95C. 1H NMR (300 MHz, J6-DMSO) δ 3.14 (s, 3H), 7.15 (app t, IH), 7.55 (dd, IH), 7.67 (dd, IH), 11.09 (br s, IH).
86% With water; hydrogen bromide; acetic acid; for 29.0h;Reflux; Step 3: 2-Fluoro-4-methanesulfonyl-phenol; A solution of <strong>[20951-14-8]2-fluoro-4-methanesulfonyl-1-methoxy-benzene</strong> (1.00 g, 4.9 mmol) in a mixture of 48% aqueous HBr (3 mL) and 33% HBr in acetic acid (1.5 mL) was heated at reflux for 20 h. The reaction mixture was cooled to room temperature and extracted with ethyl acetate. The organic layer was dried (sodium sulfate), filtered, evaporated and chromatographed, eluting with 30% ethyl acetate/hexanes, to give 2-fluoro-4-methanesulfonyl-phenol (800 mg, 86%) as a white solid. Mass spectrum (APCI) m/z M-H=189.
With boron tribromide; In dichloromethane; at -78 - 20℃; for 12.0h; To a stirred solution of the product from Step B (480 mg, 2.35 mmol) in dichloromethane (10 mL) was added boron tribromide (12.0 mL, 1.0 M in dichloromethane, 12.0 mmol) at-78 C. The reaction was then allowed to warm to room temperature slowly. After stirring at room temperature for 12 h, the reaction was concentrated under reduced pressure and the residue was purified by flash chromatography (silica gel, 50:50 hexanes/ethyl acetate) to give the desired compound.
 

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