| Identification | Back Directory | [Name]
1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE | [CAS]
3205-94-5 | [Synonyms]
NSC 291644
Cyclopentane-1,2-dicarboxylic anhydride
1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE
5,6-dihydro-4H-cyclopenta[c]furan-1,3-dione
Cyclopentene-1,2-dicarboxylic acid anhydride
1-Cyclopentene-1,2-dicarboxylic anhydride 96%
5,6-dihydro-4H-cyclopenta[c]furan-1,3-quinone
5,6-Dihydro-1H-cyclopenta[c]furan-1,3(4H)-dione
1H-Cyclopenta[c]furan-1,3(4H)-dione, 5,6-dihydro-
4,5,6,6a-Tetrahydro-1H-cyclopenta[c]furan-1,3(3aH)-dione
1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE ISO 9001：2015 REACH | [Molecular Formula]
C7H6O3 | [MDL Number]
MFCD00013330 | [MOL File]
3205-94-5.mol | [Molecular Weight]
138.12 |
| Chemical Properties | Back Directory | [Melting point ]
42-45 °C(lit.)
| [Boiling point ]
133-135 °C10 mm Hg(lit.)
| [density ]
1.2667 (rough estimate) | [refractive index ]
n20/D 1.4978(lit.)
| [Fp ]
>230 °F
| [storage temp. ]
Inert atmosphere,2-8°C | [form ]
solid | [BRN ]
123650 |
| Hazard Information | Back Directory | [Uses]
Valuable Diels-Alder dienophile, for example, in approach to the bicycloundecane system in taxanes. | [Purification Methods]
If IR has OH peaks, then some hydrolysis to the diacid (m 178o) must have occurred. In this case reflux it with an appropriate volume of Ac2O for 30minutes, evaporate the Ac2O and distil it in vacuo. The distillate solidifies and can be recrystallised from EtOAc/hexane (1:1). The diacid distils without decomposition due to formation of the anhydride. The dimethyl ester has m 120-125o/11mm. [Askain Chem Ber 98 2322 1965, Beilstein 17/11 V 125.] |
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