Chroman-4-on
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- CAS-Nr.
- 491-37-2
- Bezeichnung:
- Chroman-4-on
- Englisch Name:
- 4-Chromanone
- Synonyma:
- CHROMAN-4-ONE;CHROMANONE;Isochromanone;2,3-Dihydro-4H-1-benzopyran-4-one;4-Chlomanone;4-CHROMANONE;4-chormanone;CHROMANONE, 4-;4-Chromanone,99%;4-Chromanone >
- CBNumber:
- CB4191157
- Summenformel:
- C9H8O2
- Molgewicht:
- 148.16
- MOL-Datei:
- 491-37-2.mol
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Chroman-4-on Eigenschaften
Sicherheit
- Risiko- und Sicherheitserkl?rung
- Gefahreninformationscode (GHS)
| Kennzeichnung gef?hrlicher |
Xi |
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| R-S?tze: |
33-36/37/38 |
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| S-S?tze: |
24/25-36-26 |
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| WGK Germany |
2 |
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| RTECS-Nr. |
DJ2981225 |
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| TSCA |
Yes |
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| HazardClass |
IRRITANT |
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| HS Code |
29329990 |
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| Bildanzeige (GHS) |
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| Alarmwort |
Warnung |
| Gefahrenhinweise |
| Code |
Gefahrenhinweise |
Gefahrenklasse |
Abteilung |
Alarmwort |
Symbol |
P-Code |
| H303 |
May be harmfulif swallowed |
Acute toxicity,oral |
Category 5 |
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P312 |
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| Sicherheit |
| P270 |
Bei Gebrauch nicht essen, trinken oder rauchen. |
| P301+P312 |
BEI VERSCHLUCKEN: Bei Unwohlsein GIFTINFORMATIONSZENTRUM/Arzt/... (geeignete Stelle für medizinische Notfallversorgung vom Hersteller/Lieferanten anzugeben) anrufen. |
| P403 |
An einem gut belüfteten Ort aufbewahren. |
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Chroman-4-on Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R33:Gefahr kumulativer Wirkungen.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-S?tze Betriebsanweisung:
S24/25:Berührung mit den Augen und der Haut vermeiden.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
Chemische Eigenschaften
white to light yellow crystal powder
Verwenden
4-Chromanone has been used to study the substrate specificity and catalytic ability of 4-hydroxyacetophenone monooxygenase isolated from Pseudomonas fluorescens ACB
l?uterung methode
It has been recrystallised from pet ether, or purified by dissolving in *C6H6 washing with H2O, drying (MgSO4), evaporating and distilling in a vacuum, then recrystallising the residue. The liquid has a pleasant lemon-like odour. The semicarbazone has m 227o. [Loudon & Razdan J Chem Soc 4299 1954.] The oxime is prepared from 3g of chromanone, 3g NH2OH.HCl in EtOH (50mL), 6g K2CO3 and refluxed on a water bath for 6hours. The solution is poured into H2O, the solid is filtered off, dried and dissolved in hot *C6H6 which on addition of pet ether yields the oxime as glistening needles m 140o. Hydrolysis of this gives very pure chromanone. The benzal derivative is prepared from 3g of chromanone and 4g PhCHO in 50mL EtOH, heated to boiling, 10mL of conc HCl are added dropwise and set aside for several days. The derivative separates and is recrystallised from EtOH to give yellow needles, m 112o [Powell J Am Chem Soc 45 2711 1923]. Reaction with Pb(OAc)4 yields the 3-acetoxy derivative m 74o (from pet ether + trace of EtOAc) [Cavill et al. J Chem Soc 4573 1954, Beilstein 17/10V 14].
Chroman-4-on Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
2H-1-Benzopyran-4-amine,3,4-dihydro-,(4R)-(9CI)
2H-1-Benzopyran-4-amine,3,4-dihydro-,(4S)-(9CI)
4H-Benzo[b]pyran-4-on
ethyl 4-oxo-3,4-dihydro-2H-1-benzopyran-3-carboxylate
2H-1-Benzopyran-6-sulfonyl chloride, 3,4-dihydro-4-oxo-
2-[5H-CHROMENO[4,3-D]PYRIMIDIN-2-YL(METHYL)AMINO]ACETIC ACID
3-[(E)-(3-FLUOROPHENYL)METHYLIDENE]-2,3-DIHYDRO-4H-CHROMEN-4-ONE
3-[(E)-2-THIENYLMETHYLIDENE]-2,3-DIHYDRO-4H-CHROMEN-4-ONE
Chroman-4-on Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.
Global( 304)Lieferanten
491-37-2(Chroman-4-on)Verwandte Suche:
- ,3-Dihydro-2-benzopyran-4-one
- ,3-Dihydro-4-benzopyranone
- 2,3-dihydro-4-benzopyranone
- 2,3-dihydro-4h-1-benzopyran-4-on
- 4-chormanone
- CHROMANONE, 4-
- 2,3-DIHYDRO-4H-CHROMEN-4-ONE
- 2,3-DIHYDRO-1-BENZOPYRAN-4-ONE
- 2,4-DIHYDRO-1-BENZOPYRAN-4-ONE
- 4-CHROMANONE
- 4-Chlomanone
- ChondrotinSulfateBp98
- 4-Chromanone, 98+%
- 4-Chromanone,99%
- dihydrobenz-γ-pyrone
- 2H-1-Benzopyran-4(3H)-one
- 2,3-dihydrochroMen-4-one
- 4H-1-Benzopyran-4-one, 2,3-dihydro-
- 2,3-Dihydro-1-benzopyran-4-one, 2,3-Dihydro-4H-chromen-4-one
- 4-Chromanone ISO 9001：2015 REACH
- 4-Chromanone >
- JRH-01801, Chroman-4-one, 97%
- Isochromanone
- 2,3-Dihydro-4H-1-benzopyran-4-one
- CHROMANONE
- CHROMAN-4-ONE
- 491-37-2
- Heterocyclic Building Blocks
- KETONE
- Building Blocks
- Benzopyrans
- Fused Ring Systems
