ChemicalBook > CAS DataBase List > 8-BROMO-2H-1-BENZOPYRAN-2-ONE

8-BROMO-2H-1-BENZOPYRAN-2-ONE

Product Name: 8-BROMO-2H-1-BENZOPYRAN-2-ONE
CAS No.: 33491-30-4
Chemical Name: 8-BROMO-2H-1-BENZOPYRAN-2-ONE
Synonyms: 8-bromocoumarin;8-Bromochromen-2-one;8-BroMo-2H-chroMen-2-one;8-BROMO-2H-1-BENZOPYRAN-2-ONE;2H-1-Benzopyran-2-one, 8-bromo-
CBNumber: CB62453781
Molecular Formula: C9H5BrO2
Formula Weight: 225.04
MOL File: 33491-30-4.mol

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8-BROMO-2H-1-BENZOPYRAN-2-ONE Property

Melting point:: 135-136 °C(Solv: methanol (67-56-1))
Boiling point:: 352.2±37.0 °C(Predicted)
Density: 1.688±0.06 g/cm3(Predicted)
storage temp.: Sealed in dry,Room Temperature

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Hazard and Precautionary Statements (GHS)

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N-Bromosuccinimide Price

TRC

Product number: B694958
Product name: 8-Bromo-2h-1-benzopyran-2-one
Packaging: 25mg
Price: $45
Updated: 2021/12/16

Biosynth Carbosynth

Product number: FB144206
Product name: 8-Bromo-2H-1-benzopyran-2-one
Packaging: 100mg
Price: $52
Updated: 2021/12/16

Biosynth Carbosynth

Product number: FB144206
Product name: 8-Bromo-2H-1-benzopyran-2-one
Packaging: 250mg
Price: $105
Updated: 2021/12/16

AK Scientific

Product number: W5516
Product name: 8-Bromo-2H-1-benzopyran-2-one
Packaging: 100mg
Price: $120
Updated: 2021/12/16

Biosynth Carbosynth

Product number: FB144206
Product name: 8-Bromo-2H-1-benzopyran-2-one
Packaging: 500mg
Price: $180
Updated: 2021/12/16

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8-BROMO-2H-1-BENZOPYRAN-2-ONE Chemical Properties,Usage,Production

Synthesis

1829-34-1

33491-30-4

3-Bromo-2-hydroxybenzaldehyde (402 mg, 2.0 mmol) was used as starting material and dissolved in N-methylpyrrolidone (NMP, 5 mL). Subsequently, ethoxymethylene triphenylphosphine (765 mg, 2.2 mmol) was added to this solution. The reaction mixture was heated at 210 °C for 3 hours. Upon completion of the reaction, the mixture was cooled to room temperature and subsequently partitioned between water and ethyl acetate. The organic and aqueous layers were separated and the organic layer was dried with anhydrous magnesium sulfate (MgSO?). The product was purified by rapid column chromatography on silica gel (eluent ratio 2:1 hexane/ethyl acetate), resulting in 8-bromo-2H-1-benzopyran-2-one (116 mg, 26% yield) as a light beige solid. The mass spectrum (electrospray ionization, ES) showed m/e of 227.0 ([M + H]+).

References

[1] Patent: WO2007/118130, 2007, A2. Location in patent: Page/Page column 28-29
[2] Heterocycles, 2003, vol. 59, # 1, p. 217 - 224

8-BROMO-2H-1-BENZOPYRAN-2-ONE Preparation Products And Raw materials

Raw materials

Preparation Products

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View Lastest Price from 8-BROMO-2H-1-BENZOPYRAN-2-ONE manufacturers

Shaanxi Dideu Medichem Co. Ltd

Product: 8-BROMO-2H-1-BENZOPYRAN-2-ONE 33491-30-4
Price: US $1.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 20T
Release date: 2024-08-14

Career Henan Chemical Co

Product: 8-BROMO-2H-1-BENZOPYRAN-2-ONE 33491-30-4
Price: US $1.00/g
Min. Order: 1g
Purity: 99.0%
Supply Ability: 100kg
Release date: 2020-01-09

33491-30-4, 8-BROMO-2H-1-BENZOPYRAN-2-ONERelated Search:

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8-BROMO-2H-1-BENZOPYRAN-2-ONE

8-BroMo-2H-chroMen-2-one

8-Bromochromen-2-one

2H-1-Benzopyran-2-one, 8-bromo-

8-bromocoumarin

33491-30-4