ChemicalBook > CAS DataBase List > 8-Bromo-4-chromanone

8-Bromo-4-chromanone

Uses

Product Name: 8-Bromo-4-chromanone
CAS No.: 204377-88-8
Chemical Name: 8-Bromo-4-chromanone
Synonyms: 8-Bromo-4-chromanone;8-bromo-chroman-4-one;8-BroMo-4-chroManone 97%;8-broMo-2,3-dihydrochroMen-4-one;8-bromo-2,3-dihydro-4H-chromen-4-one;8-BROMO-2,3-DIHYDRO-1-BENZOPYRAN-4-ONE;8-broMo-3,4-dihydro-2H-1-benzopyran-4-one;8-Bromo-2,3-dihydro-4H-1-benzopyran-4-one;4H-1-Benzopyran-4-one, 8-bromo-2,3-dihydro-
CBNumber: CB7947485
Molecular Formula: C9H7BrO2
Formula Weight: 227.05
MOL File: 204377-88-8.mol

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8-Bromo-4-chromanone Property

Boiling point:: 339℃
Density: 1.621
Flash point:: 159℃
storage temp.: Sealed in dry,Room Temperature
Appearance: White to light yellow Solid

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Hazard and Precautionary Statements (GHS)

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N-Bromosuccinimide Price

TRC

Product number: B815155
Product name: 8-Bromochroman-4-One
Packaging: 10mg
Price: $45
Updated: 2021/12/16

TRC

Product number: B815155
Product name: 8-Bromochroman-4-One
Packaging: 100mg
Price: $175
Updated: 2021/12/16

Biosynth Carbosynth

Product number: FB142282
Product name: 8-Bromo-4-chromanone
Packaging: 100mg
Price: $63
Updated: 2021/12/16

Biosynth Carbosynth

Product number: FB142282
Product name: 8-Bromo-4-chromanone
Packaging: 250mg
Price: $125
Updated: 2021/12/16

Biosynth Carbosynth

Product number: FB142282
Product name: 8-Bromo-4-chromanone
Packaging: 500mg
Price: $220
Updated: 2021/12/16

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8-Bromo-4-chromanone Chemical Properties,Usage,Production

Uses

8-Bromo-4-dihydrochromone is an important intermediate, but its synthesis yield is low, it is difficult to synthesize, and its selling price is more than 20 times that of the similar product 6-bromo-3-dihydrochromone.

Synthesis

1403387-58-5

204377-88-8

Step 3: Synthesis of 8-bromo-benzotetrahydropyran-4-one (P34c) Compound P34b (2.0 g, 8.15 mmol) was dissolved in ethylene glycol (20 mL) and heated to reflux for 4 hours. After completion of the reaction, the reaction mixture was cooled, poured into water and extracted twice with ether (Et2O). The organic layers were combined and washed sequentially with 1 M aqueous sodium hydroxide (NaOH) and saturated aqueous ammonium bicarbonate (NH4HCO3). The organic layers were dried over anhydrous sodium sulfate (Na2SO4), filtered and concentrated, and finally purified by column chromatography (eluent: petroleum ether/ethyl acetate = 50/1) to afford the target compound P34c (0.88 g, 48% yield) as a yellow solid.

References

[1] Patent: WO2012/139775, 2012, A1. Location in patent: Page/Page column 60-61

8-Bromo-4-chromanone Preparation Products And Raw materials

Raw materials

Preparation Products

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View Lastest Price from 8-Bromo-4-chromanone manufacturers

Shanghai UCHEM Inc.

Product: 8-Bromochroman-4-one 204377-88-8
Price: US $89.00-296.00/g
Min. Order: 5g
Purity: 0.99
Supply Ability: 25kg
Release date: 2023-12-07

Shanghai Rlavie Technology Co ltd

Product: 8-Bromo-4-chromanone 204377-88-8
Price: US $0.00-0.00/KG
Min. Order: 1g
Purity: 98%minHPLC
Supply Ability: 50kgs/month
Release date: 2021-11-05

Career Henan Chemical Co

Product: 8-Bromo-4-chromanone 204377-88-8
Price: US $1.00/KG
Min. Order: 1KG
Purity: 95-99%
Supply Ability: 1ton
Release date: 2020-01-02

204377-88-8, 8-Bromo-4-chromanoneRelated Search:

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204377-88-8