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Cas Database |
| Name |
2-Cyclopentenone |
EINECS | 213-213-0 |
| CAS No. | 930-30-3 | Density | 1.046 g/cm3 |
| PSA | 17.07000 | LogP | 0.90550 |
| Solubility | Almost insoluble in water, soluble in alcohol and ether | Melting Point |
N/A |
| Formula | C5H6O | Boiling Point | 135.999 °C at 760 mmHg |
| Molecular Weight | 82.102 | Flash Point | 40.045 °C |
| Transport Information | UN 1224 3/PG 3 | Appearance | Clear yellow liquid |
| Safety | 16-36-36/37/39 | Risk Codes | 10-37-36/37/38-22 |
| Molecular Structure |
|
Hazard Symbols |
 Xi, Xn
|
| Synonyms |
1-Cyclopenten-3-one;1-Cyclopenten-5-one;2-Cyclopentenone;Cyclopenten-3-one;NSC 73117;2-Cyclopenten-1-one; |
Article Data | 151 |
2-Cyclopentenone Synthetic route
- 130249-17-1, 6705-52-8
2,3-epoxycyclopentanone
- 930-30-3
cyclopent-2-enone
| Conditions | Yield |
|---|---|
| With Amberlyst 15; sodium iodide In acetone at 20℃; for 3h; deoxygenation; | 96% |
- 33698-60-1
hepta-1,6-dien-3-one
- 930-30-3
cyclopent-2-enone
| Conditions | Yield |
|---|---|
| With [1,3-bis-mesityl-imidazolidin-2-yl]Cl2(PCp3)Ru=CHCH=CMe2 In dichloromethane for 12h; metathesis; Heating; | 93% |
| Conditions | Yield |
|---|---|
| palladium diacetate In acetonitrile | 93% |
- 10493-98-8
2-hydroxy-2-cyclopenten-1-one
- 930-30-3
cyclopent-2-enone
| Conditions | Yield |
|---|---|
| 93% |
- 1056246-36-6
2-bromocyclopentanone
- 930-30-3
cyclopent-2-enone
| Conditions | Yield |
|---|---|
| With lithium carbonate; hydroquinone; lithium bromide In DMF (N,N-dimethyl-formamide) at 100℃; for 4h; | 91.8% |
| Conditions | Yield |
|---|---|
| With oxygen; palladium matal-containing silica-supported catalyst In various solvent(s) at 59.9℃; for 24h; Product distribution; Mechanism; Pd(0) supported on various zeolites , influence of calcination and reaction temperature and of the solvent; | A 90.1% B n/a |
| With oxygen; silica gel; palladium In various solvent(s) at 59.9℃; for 24h; Product distribution; solvent; | A 90.1% B 0.8% |
| With oxygen; silica gel; palladium In various solvent(s) at 59.9℃; for 24h; Yields of byproduct given; | A 90.1% B n/a |
| With oxygen; silica gel; palladium In various solvent(s) at 59.9℃; for 24h; | A 90.1% B 0.8% |
| Conditions | Yield |
|---|---|
| With cerium(III) chloride; sodium iodide In acetonitrile for 0.5h; Ambient temperature; | 90% |
| With silica gel; iron(III) chloride at 20℃; for 0.166667h; | 87% |
| With ammonium cerium(IV) nitrate In methanol; water at 20℃; for 0.166667h; Ring cleavage; | 86% |
- 3212-60-0, 6426-28-4, 62894-08-0, 109431-72-3
cyclopent-2-enol
- 930-30-3
cyclopent-2-enone
| Conditions | Yield |
|---|---|
| With tert.-butylhydroperoxide; copper(ll) bromide In water; acetonitrile at 20℃; for 3.7h; Inert atmosphere; | 90% |
| With 2,2,6,6-tetramethyl-piperidine-N-oxyl; iron(III) chloride In water; ethyl acetate at 20℃; for 2h; | 78% |
| With 4-Phenylpyridine 1-oxide; chloro{bis-N,N'-(salicylaldehyde)ethylenediiminato}chromium(III); iodosylbenzene In dichloromethane at 20℃; for 14h; Oxidation; | 74 % Turnov. |
- 80522-45-8
1-triisopropylsilyl(oxy)-cyclopentene
- 930-30-3
cyclopent-2-enone
| Conditions | Yield |
|---|---|
| With tert.-butylhydroperoxide; disodium hydrogenphosphate; oxygen; palladium dihydroxide In dichloromethane at 24℃; for 42h; | 88% |
| Conditions | Yield |
|---|---|
| With methanesulfonic acid; oxygen; palladium diacetate; molybdovanadophosphate/C In water; acetonitrile at 50℃; for 6h; Wacker-type oxidation; | A 1% B 85% |
| With methanesulfonic acid; oxygen; palladium diacetate; molybdovanadophosphate/C In ethanol; water at 50℃; for 6h; Wacker-type oxidation; | A 6% B 75% |
2-Cyclopentenone Specification
The 2-2-Cyclopentenone with CAS registry number of 930-30-3 is also known as 2-Cyclopentenone. The IUPAC name is Cyclopent-2-en-1-one. It belongs to product categories of Ring Systems; C3 to C6; Carbonyl Compounds; Ketones. Its EINECS registry number is 213-213-0. In addition, the formula is C5H6O and the molecular weight is 82.10. This chemical is a clear yellow liquid that almost insoluble in water but soluble in alcohol and ether. What's more, it may cause inflammation to the skin or other mucous membranes and may cause damage to health. It should be sealed at the temperature of 4 °C at room temperature away from oxidants.
Physical properties about 2-2-Cyclopentenone are: (1)ACD/BCF (pH 5.5): 1; (2)ACD/BCF (pH 7.4): 1; (3)ACD/KOC (pH 5.5): 20.652; (4)ACD/KOC (pH 7.4): 20.652; (5)#H bond acceptors: 1; (6)Index of Refraction: 1.492; (7)Molar Refractivity: 22.793 cm3; (8)Molar Volume: 78.507 cm3; (9)Surface Tension: 36.818 dyne/cm; (10)Density: 1.046 g/cm3; (11)Flash Point: 40.045 °C; (12)Enthalpy of Vaporization: 37.34 kJ/mol; (13)Boiling Point: 135.999 °C at 760 mmHg; (14)Vapour Pressure: 7.529 mmHg at 25 °C.
Preparation of 2-2-Cyclopentenone: it is prepared by elimination of α-bromo-cyclopentanone using lithium carbonate and claisen condensation-decarboxylation-isomerization cascades of unsaturated diesters.
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Uses of 2-2-Cyclopentenone: it is used to produce 1-deuterio-2-cyclopentenol. The reaction occurs with reagent LiAlD4 and solvent diethyl ether with other condition of heating for 15 minutes. The yield is about 84%.
When you are using this chemical, please be cautious about it. As a chemical, it is irritating to eyes, respiratory system and skin. It also is flammable and harmful if swallowed. During using it, wear suitable protective clothing, gloves and eye/face protection. Keep away from sources of ignition.
You can still convert the following datas into molecular structure:
1. Canonical SMILES: C1CC(=O)C=C1
2. InChI: InChI=1S/C5H6O/c6-5-3-1-2-4-5/h1,3H,2,4H2
3. InChIKey: BZKFMUIJRXWWQK-UHFFFAOYSA-N
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