1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE
- CAS NO.：3205-94-5
- Empirical Formula: C7H6O3
- Molecular Weight: 138.12
- MDL number: MFCD00013330
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:16:07
What is 1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE?
The Uses of 1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE
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.]
Properties of 1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE
| Melting point: | 42-45 °C (lit.) |
| Boiling point: | 133-135 °C/10 mmHg (lit.) |
| Density | 1.2667 (rough estimate) |
| refractive index | n |
| Flash point: | >230 °F |
| storage temp. | under inert gas (nitrogen or Argon) at 2-8°C |
| BRN | 123650 |
Safety information for 1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for 1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE
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