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C112909

Sigma-Aldrich

2-Cyclopenten-1-one

98%

Synonym(s):

1-Cyclopenten-3-one, 1-Cyclopenten-5-one, 2-Cyclopentenone, Cyclopent-2-en-1-one, Cyclopenten-3-one

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About This Item

Empirical Formula (Hill Notation):
C5H6O
CAS Number:
930-30-3
Molecular Weight:
82.10
Beilstein:
1446054
EC Number:
213-213-0
MDL number:
MFCD00001401
UNSPSC Code:
12352100
PubChem Substance ID:
24892357
NACRES:
NA.22

Quality Level

200

Assay

98%

form

liquid

refractive index

n20/D 1.481 (lit.)

bp

64-65 °C/19 mmHg (lit.)

density

0.98 g/mL at 25 °C (lit.)

storage temp.

2-8°C

SMILES string

O=C1CCC=C1

InChI

1S/C5H6O/c6-5-3-1-2-4-5/h1,3H,2,4H2

InChI key

BZKFMUIJRXWWQK-UHFFFAOYSA-N

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Application

Versatile electrophile employed in a variety of addition reactions including conjugate addition of organocopper nucleophiles, Michael reaction with silyl enol ethers, and siloxanes, Diels-Alder cycloadditions, and phosphoniosilylations.

Pictograms

Flame
GHS02

Signal Word

Warning

Hazard Statements

H226

Hazard Classifications

Flam. Liq. 3

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

107.6 °F - closed cup

Flash Point(C)

42 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Brett D Schwartz et al.
Organic letters, 15(8), 1934-1937 (2013-04-05)
The title natural product, 1, has been synthesized in 20 steps from the enantiomerically pure cis-1,2-dihydrocatechol 2, itself obtained through the whole-cell biotransformation of toluene. The pivotal steps in the reaction sequence involve a Diels-Alder cycloaddition reaction between diene 2
Rachel Lerebours et al.
Organic letters, 9(14), 2737-2740 (2007-06-15)
Palladium-phosphinous acids catalyze the conjugate addition of arylsiloxanes to a wide range of alpha,beta-unsaturated substrates in water. A microwave-assisted procedure is described that uses 5 mol % of POPd1 to afford beta-substituted ketones, aldehydes, esters, nitriles, and nitroalkanes in 83%
Sadiya Raja et al.
Chemistry, an Asian journal, 7(10), 2361-2366 (2012-08-02)
A Brønsted acid-catalyzed asymmetric Nazarov cyclization of acyclic α-alkoxy dienones has been developed. The reaction offers access to chiral cyclopentenones in a highly enantioselective manner. The reaction is complementary to our previously reported Brønsted acid-catalyzed electrocyclization reactions, which provided differently
Diverse reactivity in a rhodium(III)-catalyzed oxidative coupling of N-allyl arenesulfonamides with alkynes.
Dongqi Wang et al.
Angewandte Chemie (International ed. in English), 51(49), 12348-12352 (2012-10-31)
Tetrahedron Letters, 34, 6777-6777 (1993)
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