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

7-hydroxy-2-methyl-4H-chromen-4-one Struktur
6320-42-9
CAS-Nr.
6320-42-9
Englisch Name:
7-hydroxy-2-methyl-4H-chromen-4-one
Synonyma:
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
Summenformel:
C10H8O3
Molgewicht:
176.17
MOL-Datei:
6320-42-9.mol

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

Schmelzpunkt:
254-255℃
Siedepunkt:
345.5±42.0 °C(Predicted)
Dichte
1.319±0.06 g/cm3(Predicted)
storage temp. 
Inert atmosphere,Room Temperature
pka
7.07±0.40(Predicted)
Major Application
pharmaceutical (small molecule)
InChI
1S/C10H8O3/c1-6-4-9(12)8-3-2-7(11)5-10(8)13-6/h2-5,11H,1H3
InChIKey
QIPBSGDZHKDNNJ-UHFFFAOYSA-N
SMILES
[o]1c2c([c](cc1C)=O)ccc(c2)O
Sicherheit
  • Risiko- und Sicherheitserkl?rung
  • Gefahreninformationscode (GHS)
WGK Germany  WGK 3
Speicherklasse 11 - Combustible Solids
Bildanzeige (GHS) Exclamation Mark (GHS07)
Alarmwort Warnung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H302 Gesundheitssch?dlich bei Verschlucken. Akute Toxizit?t oral Kategorie 4 Warnung P264, P270, P301+P312, P330, P501
H315 Verursacht Hautreizungen. Hautreizung Kategorie 2 Warnung P264, P280, P302+P352, P321,P332+P313, P362
H319 Verursacht schwere Augenreizung. Schwere Augenreizung Kategorie 2 Warnung P264, P280, P305+P351+P338,P337+P313P
Sicherheit
P261 Einatmen von Staub vermeiden.
P305+P351+P338 BEI KONTAKT MIT DEN AUGEN: Einige Minuten lang behutsam mit Wasser spülen. Eventuell vorhandene Kontaktlinsen nach M?glichkeit entfernen. Weiter spülen.

7-hydroxy-2-methyl-4H-chromen-4-one Chemische Eigenschaften,Einsatz,Produktion Methoden

Verwenden

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

Synthese

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 synthesis

7-hydroxy-2-methyl-4H-chromen-4-one Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


7-hydroxy-2-methyl-4H-chromen-4-one Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.

Global( 43)Lieferanten
Firmenname Telefon E-Mail Land Produktkatalog Edge Rate
ATK CHEMICAL COMPANY LIMITED
+undefined-21-51877795
ivan@atkchemical.com China 33024 60
BOC Sciences
+1-631-485-4226
inquiry@bocsci.com United States 19936 58
Hefei Hirisun Pharmatech Co., Ltd
+8615056975894
shawn@hirisunpharm.com CHINA 9911 58
Labnetwork lnc.
+86-27-50766799 +8618062016861
contact@labnetwork.com China 19987 58
sgtlifesciences pvt ltd
+8617013299288
dj@sgtlifesciences.com China 12373 58
Jilin Chinese Academy of Sciences-yanshen Technology
+undefined18143011203
info@chemextension.com China 42056 58
DAYANG CHEM (HANGZHOU) CO.,LTD
+86-88938639 +86-17705817739
info@dycnchem.com China 53803 58
Amadis Chemical Company Limited
571-89925085
sales@amadischem.com China 131956 58
Shanghai Sinch Parmaceuticals Tech. Co. Ltd. +86-21-54098501
sales@sinch.com.cn China 11598 64
JinYan Chemicals(ShangHai) Co.,Ltd. 13817811078
sales@jingyan-chemical.com China 9976 60

  • 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-methylchromen-4-one
  • Hymecromone Impurity 2 (Hymecromone EP Impurity B)
  • Hymecromone EP Impurity B
  • 7-Hydroxy-2-methyl-4H-1-benzopyran-
  • 7-hydroxy-2-methyl-1-benzopyran-4-one
  • 6320-42-9
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