7-hydroxy-2-methyl-4H-chromen-4-one

Product Name: 7-hydroxy-2-methyl-4H-chromen-4-one
CAS No.: 6320-42-9
Chemical Name: 7-hydroxy-2-methyl-4H-chromen-4-one
Synonyms: NSC 31894;Hymecromone EP Impurity B;7-Hydroxy-2-methylchromone;7-hydroxy-2-methylchromen-4-one;7-Hydroxy-2-methyl-4H-1-benzopyran-;7-hydroxy-2-methyl-1-benzopyran-4-one;7-Hydroxy-2-Methyl-4H-1-benzopyran-4-one;4H-1-Benzopyran-4-one, 7-hydroxy-2-Methyl-;Hymecromone Impurity 2 (Hymecromone EP Impurity B)
CBNumber: CB62490146
Molecular Formula: C10H8O3
Formula Weight: 176.17
MOL File: 6320-42-9.mol

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7-hydroxy-2-methyl-4H-chromen-4-one Property

Melting point:: 254-255℃
Boiling point:: 345.5±42.0 °C(Predicted)
Density: 1.319±0.06 g/cm3(Predicted)
storage temp.: Inert atmosphere,Room Temperature
pka: 7.07±0.40(Predicted)

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: Y0000013
Product name: Hymecromone impurity B
Purity: European Pharmacopoeia (EP) Reference Standard
Packaging: y0000013
Price: $161
Updated: 2024/03/01

TRC

Product number: H947035
Product name: 7-Hydroxy-2-methyl-4H-chromen-4-one
Packaging: 100mg
Price: $105
Updated: 2021/12/16

AK Scientific

Product number: 2754BB
Product name: 7-Hydroxy-2-methyl-4H-chromen-4-one
Packaging: 1g
Price: $763
Updated: 2021/12/16

American Custom Chemicals Corporation

Product number: CHM0165657
Product name: 7-HYDROXY-2-METHYL-4H-CHROMEN-4-ONE
Purity: 95.00%
Packaging: 1G
Price: $1351.35
Updated: 2021/12/16

American Custom Chemicals Corporation

Product number: CHM0165657
Product name: 7-HYDROXY-2-METHYL-4H-CHROMEN-4-ONE
Purity: 95.00%
Packaging: 5G
Price: $2691.15
Updated: 2021/12/16

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7-hydroxy-2-methyl-4H-chromen-4-one Chemical Properties,Usage,Production

Uses

7-Hydroxy-2-methyl-4H-chromen-4-one is used in the synthesis of 2,2-Dimethyl-2H-pyranoflavonol and pyranochromone derivatives.

Synthesis

Step(i): 7-Acetoxy-3-acetyl-2-methylchromone β-Resacetophenone (4.A.6) (10 g，0.066 mole) is heated with fusedsodium acetate (20 g) in acetic anhydride (30 ml) for 5 hr at 170-180°(oil bath) under anhydrous conditions. The reaction mixture is pouredover crushed ice, stirred well and left overnight.The separated product isfiltered and washed with water. It is crystallised from alcohol as light yellowneedles.Yield 10 g (58.5%).M.p.127° (lit. m.p.126-27°).
step (ii) : The above 7-acetoxy-3-acetyl-2-methylchromone (1 g,0.0038 mole) isrefluxed (2 hr) with aqueous sodium carbonate solution (10%,50 ml).Theclear solution is then acidified with hydrochloric acid (1:1).The separatedproduct is filtered and washed with water. It is crystallised from alcohol asthick prismatic crystals. Yield 0.5 g (73.5%).M.p. 249-50°.(lit. m.p.254-55°).

7-hydroxy-2-methyl-4H-chromen-4-one Preparation Products And Raw materials

Raw materials

Preparation Products

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7-hydroxy-2-methyl-4H-chromen-4-one Suppliers

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6320-42-9, 7-hydroxy-2-methyl-4H-chromen-4-oneRelated Search:

NSC 31894

7-Hydroxy-2-Methyl-4H-1-benzopyran-4-one

4H-1-Benzopyran-4-one, 7-hydroxy-2-Methyl-

7-Hydroxy-2-methylchromone

7-hydroxy-2-methyl-1-benzopyran-4-one

7-Hydroxy-2-methyl-4H-1-benzopyran-

Hymecromone EP Impurity B

Hymecromone Impurity 2 (Hymecromone EP Impurity B)

7-hydroxy-2-methylchromen-4-one

6320-42-9