Cyclopentadiene → 826-62-0
Reaction equation
[CH:1]1[CH2:5][CH:4]=[CH:3][CH:2]=1.[C:6]1(=[O:12])[O:11][C:9](=[O:10])[CH:8]=[CH:7]1>>[CH:3]12[CH2:4][CH:5]([CH:1]=[CH:2]1)[CH:7]1[C:6]([O:11][C:9](=[O:10])[CH:8]21)=[O:12]Participants
3
Reactant 2
Product 1
Procedure
Using the procedure of Example 1, cyclopentadiene was reacted with maleic anhydride to provide 5-norbornene-2,3-dicarboxylic anhydride, which was then slowly added to a 10% NaOH aqueous solution. The resulting mixture was heated to about 85° C. for about 90 minutes and slowly cooled to room temperature. The resulting solution was neutralized by adding 10% sulfuric acid drop-wise. The reaction mixture was extracted using ethyl acetate. The organic phase was separated, dried over anhydrous MgSO4, filtered, and concentrated to yield 5-norbornene-2,3-dicarboxylic acid as a white solid.
Sources & evidence
- ORD record
- ord-f5060602e17a4317af4354b934b90018
- Source dataset
- uspto-grants-2002_07
- Patent number
- US06426171B1
Reaction notes
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