2-Cyclopenten-1-one

2-Cyclopenten-1-one Basic information

Product Name:	2-Cyclopenten-1-one
Synonyms:	2-CYCLOPENTEN-1-ONE;2-CYCLOPENTENE-1-ONE;2-CYCLOPENTENONE;CPEO;CYCLOPENT-2-ENONE;2_cyclopenten-1-0ne;2-cyclopenten-1-0ne;2-Cyclopentenone-1
CAS:	930-30-3
MF:	C5H6O
MW:	82.1
EINECS:	213-213-0
Product Categories:	Ring Systems;C3 to C6;Carbonyl Compounds;Ketones;Pyridines
Mol File:	930-30-3.mol

2-Cyclopenten-1-one Chemical Properties

Boiling point	64-65 °C19 mm Hg(lit.)
density	0.98 g/mL at 25 °C(lit.)
refractive index	n20/D 1.481(lit.)
Fp	108 °F
storage temp.	2-8°C
solubility	soluble in Chloroform, Methanol
form	Liquid
Specific Gravity	0.980
color	Clear yellow
Water Solubility	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 DataBase Reference	930-30-3(CAS DataBase Reference)
NIST Chemistry Reference	2-Cyclopenten-1-one(930-30-3)

Safety Information

Hazard Codes	Xi,Xn
Risk Statements	10-37-36/37/38-22
Safety Statements	16-36-36/37/39
RIDADR	UN 1224 3/PG 3
WGK Germany	3
F	8
Hazard Note	Irritant
HazardClass	3
PackingGroup	III
HS Code	29142990

MSDS Information

Provider	Language
2-Cyclopenten-1-one	English
SigmaAldrich	English
ACROS	English
ALFA	English

2-Cyclopenten-1-one Usage And Synthesis

Chemical Properties	clear yellow liquid
Uses	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.
Definition	ChEBI: 2-cyclopenten-1-one is an enone that is cyclopentanone having a C=C double bond at position 2. It has a role as a Hsp70 inducer. It is an enone and an alicyclic ketone.
Preparation	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

2-Cyclopenten-1-one Preparation Products And Raw materials

Raw materials	Diethyl ether-->Dichloromethane-->Government regulation-->Aluminum chloride-->Carbon tetrachloride-->Calcium carbonate-->Carbon disulfide-->Cyclopentanone-->Calcium hypochlorite-->2,4,6-Collidine-->Cyclopentene, 4-(methylsulfinyl)-4-(methylthio)--->4-PENTENOYL CHLORIDE-->3-CYCLOPENTEN-1-ONE
Preparation Products	2,3-dihydro-1H-cyclopenta[b]naphthalen-1-one-->3-Hydroxy-3-methylcyclopentanamine hydrochloride-->7-METHYL-1-INDANONE-->Carbamic acid, N-?(3-?oxocyclopentyl)?-?, 1,?1-?dimethylethyl ester-->Furfuryl alcohol

2-[(PHENYLTHIO)METHYL]-2-CYCLOPENTEN-1-ONE Jasmone 15-EPI PROSTAGLANDIN A1 2-HYDROXY-3-METHYL-2-CYCLOPENTENONE,3-METHYL-2-HYDROXY-2-CYCLOPENTENONE AMYL CYCLOPENTENONE,2-Pentyl-2-cyclopentenone 2-Methyl-2-cyclopentenone PHORBOL 12-MYRISTATE 13-ACETATE 20-OXO-20-DEOXYPHORBOL 12,13-DIBUTYRATE PROSTAGLANDIN B1 3-METHYL-2-PENTYL-2-CYCLOPENTENONE,2-Amyl-3-methyl-2-cyclopentenone,2-Pentyl-3-methyl-2-cyclopentenone PHORBOL 12,13-DIBENZOATE 3-Ethyl-2-hydroxy-2-cyclopenten-1-one PHORBOL, 20-OXO-20-DEOXY 12-MYRISTATE 13-ACETATE, 4BETA 4ALPHA-PHORBOL TETRACHLOROCYCLOPENTENE-1,3-DIONE 4-HYDROXY-5-PHENYL-4-CYCLOPENTENE-1 3- 3-METHYL-2-CYCLOPENTENONE 2,3,4,5-TETRAMETHYL-2-CYCLOPENTENONE

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