ChemicalBook > CAS DataBase List > 7-hydroxy-2-methyl-4H-chromen-4-one

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

China 31 India 2 United States 5 Global 38
JinYan Chemicals(ShangHai) Co.,Ltd.
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13817811078
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86-021-50426522,50426273
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China
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Shanghai Sinch Parmaceuticals Tech. Co. Ltd.
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+86-21-54098501
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+86-21-54096319
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sales@sinch.com.cn
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China
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Hangzhou Sage Chemical Co., Ltd.
Tel
+86057186818502 13588463833
Fax
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Nanjing Credit Trading Co.,Ltd
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025-52164950
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025-86800069
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HBCChem, Inc.
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AN PharmaTech Co Ltd
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Shanghai JingRon Chemical Technology Co., Ltd.
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Shanghai YuanYe Biotechnology Co., Ltd.
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021-61312847; 18021002903
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Amadis Chemical Company Limited
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571-89925085
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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