7,8-difluorochroman-4-one
- Product Name
- 7,8-difluorochroman-4-one
- CAS No.
- 890840-90-1
- Chemical Name
- 7,8-difluorochroman-4-one
- Synonyms
- 7,8-difluorochroman-4-one;7,8-Difluoro-2,3-dihydro-4H-1-benzopyran-4-one;4H-1-Benzopyran-4-one, 7,8-difluoro-2,3-dihydro-
- CBNumber
- CB82489791
- Molecular Formula
- C9H6F2O2
- Formula Weight
- 184.14
- MOL File
- 890840-90-1.mol
7,8-difluorochroman-4-one Property
- Boiling point:
- 293℃
- Density
- 1.392
- Flash point:
- 127℃
- storage temp.
- 2-8°C
- Appearance
- Off-white to light brown Solid
Safety
- HS Code
- 2932990090
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Warning
- Hazard statements
-
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
- Precautionary statements
-
P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P302+P352IF ON SKIN: wash with plenty of soap and water.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
N-Bromosuccinimide Price
- Product number
- PC909653
- Product name
- 7,8-Difluorochroman-4-one
- Purity
- 97%
- Packaging
- 250mg
- Price
- $93
- Updated
- 2021/12/16
- Product number
- 2H17-3-0L
- Product name
- 7,8-Difluorochroman-4-one
- Purity
- 97%
- Packaging
- 250mg
- Price
- $149
- Updated
- 2021/12/16
- Product number
- 4709AC
- Product name
- 7,8-Difluorochroman-4-one
- Packaging
- 100mg
- Price
- $151
- Updated
- 2021/12/16
- Product number
- PC909653
- Product name
- 7,8-Difluorochroman-4-one
- Purity
- 97%
- Packaging
- 1g
- Price
- $223
- Updated
- 2021/12/16
- Product number
- 2H17-3-0L
- Product name
- 7,8-Difluorochroman-4-one
- Purity
- 97%
- Packaging
- 1g
- Price
- $357
- Updated
- 2021/12/16
7,8-difluorochroman-4-one Chemical Properties,Usage,Production
Synthesis
890840-88-7
890840-90-1
General procedure for the synthesis of 7,8-difluorobenzodihydropyran-4-one from 1,2-difluoro-3-(prop-2-yn-1-yloxy)benzene: The product of Example 82A (707 mg, 3.49 mmol) was stirred in a mixture of methanesulfonic acid (1 mL) and concentrated sulfuric acid (1 mL) at room temperature overnight. Upon completion of the reaction, the reaction was quenched with deionized water and extracted with ether. The combined ether extracts were washed sequentially with saturated sodium bicarbonate solution and brine, followed by drying with anhydrous sodium sulfate. The solvent was removed by concentration under reduced pressure to give Example 82B as a tan solid with a yield of 351 mg in 55% yield.
References
[1] Patent: US2006/128689, 2006, A1. Location in patent: Page/Page column 44
7,8-difluorochroman-4-one Preparation Products And Raw materials
Raw materials
Preparation Products
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