Cyclopenten-2-on
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- CAS-Nr.
- 930-30-3
- Bezeichnung:
- Cyclopenten-2-on
- Englisch Name:
- 2-Cyclopenten-1-one
- Synonyma:
- 2-CYCLOPENTEN-1-ONE;Cyclopentenone;CYCLOPENT-2-ENONE;2-CYCLOPENTENE-1-ONE;CPEO;2-CycL;NSC 73117;openten-1-one;2-CYCLOPENTENONE;cyclopenten-2-one
- CBNumber:
- CB3744099
- Summenformel:
- C5H6O
- Molgewicht:
- 82.1
- MOL-Datei:
- 930-30-3.mol
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Cyclopenten-2-on Eigenschaften
- Siedepunkt:
- 64-65 °C19 mm Hg(lit.)
- Dichte
- 0.98 g/mL at 25 °C(lit.)
- Brechungsindex
- n20/D 1.481(lit.)
- Flammpunkt:
- 108 °F
- storage temp.
- 2-8°C
- L?slichkeit
- soluble in Chloroform, Methanol
- Aggregatzustand
- Liquid
- Farbe
- Clear yellow
- Wichte
- 0.980
- Wasserl?slichkeit
- almost insoluble
- BRN
- 1446054
- InChI
- InChI=1S/C5H6O/c6-5-3-1-2-4-5/h1,3H,2,4H2
- InChIKey
- BZKFMUIJRXWWQK-UHFFFAOYSA-N
- SMILES
- C1(=O)CCC=C1
- LogP
- -0.114 (est)
- CAS Datenbank
- 930-30-3(CAS DataBase Reference)
- NIST chemische Informationen
- 2-Cyclopenten-1-one(930-30-3)
Cyclopenten-2-on Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R10:Entzündlich.
R37:Reizt die Atmungsorgane.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R22:Gesundheitssch?dlich beim Verschlucken.
S-S?tze Betriebsanweisung:
S16:Von Zündquellen fernhalten - Nicht rauchen.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
Chemische Eigenschaften
clear yellow liquid
Verwenden
2-Cyclopenten-1-one is a versatile electrophile employed in various addition reactions including conjugate addition of organocopper nucleophiles, Michael reaction with silyl enol ethers and siloxanes. It is also used in Diels-Alder cycloadditions and phosphoniosilylations.
synthetische
2-Cyclopentenones can be synthesized in a number of ways. One of the routes involves elimination of α-bromo-cyclopentanone using lithium carbonate and Claisen condensation-decarboxylation-isomerization cascades of unsaturated diesters as shown below.
The acid-catalyzed dehydration of cyclopentanediols affords cyclopentenone.
As a functional group, the synthesis of 2-cyclopentenones is accomplished in a variety of other ways, including the Nazarov cyclization reaction from divinyl ketones, Saegusa–Ito oxidation from cyclopentanones, ring-closing metathesis from the corresponding dienes, oxidation of the corresponding cyclic allylic alcohols, and the Pauson–Khand reaction from alkenes, alkynes, and carbon monoxide.
en.wikipedia.org
Einzelnachweise
[1] A Rossi, M G Santoro, G Elia. “2-Cyclopenten-1-one, a new inducer of heat shock protein 70 with antiviral activity.” The Journal of Biological Chemistry 271 50 (1996): 32192–6.
Cyclopenten-2-on Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
Cyclopenten-2-on Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.
Global( 302)Lieferanten
930-30-3(Cyclopenten-2-on)Verwandte Suche:
- 2-CYCLOPENTENONE
- CPEO
- 2_cyclopenten-1-0ne
- 2-cyclopenten-1-0ne
- 2-Cyclopentenone-1
- 3-Cyclopenten-2-one
- Cyclopenten-3-one
- cyclopenten-2-one
- 2-Cyclopentenone, pure, 98%
- Cyclopent-2-en-1-one 97%
- 1-Cyclopenten-3-one
- 2-Cyclopentenone, 98%, pure
- Cyclopent-2-en-3-one
- 2-Cyclopenten-1-one ,96%
- 1-Oxocyclopent-2-ene, Cyclopent-1-en-3-one
- 2-Cyclopentenone, pure, 98% 25GR
- 2-Cyclopentenone, pure, 98% 5GR
- 2-Cyclopenten-1-one, 97+%
- 3-Oxocyclopent-1-ene, Cyclopent-1-en-3-one
- Cyclopent-2-en-1-one 98+%
- 2-CycL
- openten-1-one
- 2-Cyclopenten-1-one >
- 2-Cyclopenten-1-one, 96%, for synthesis
- 2-Cyclopenten-1-One,>98%
- 1-CYCLOPENTEN-5-ONE
- NSC 73117
- 2-CYCLOPENTEN-1-ONE
- 2-CYCLOPENTENE-1-ONE
- CYCLOPENT-2-ENONE
- Cyclopentenone
- 2-Cyclopenten-1-one (6CI, 7CI, 8CI, 9CI, ACI)
- 930-30-3
- C5H6O
- Building Blocks
- Carbonyl Compounds
- C3 to C6
- Organic Building Blocks
- Ketones
- Ring Systems
- C3 to C6
- Carbonyl Compounds
- Ketones
- Pyridines
