Reaction equation
[F:1][C:2]1[CH:3]=[C:4]2[C:9](=O)[O:8][C:6](=[O:7])[C:5]2=[CH:11][C:12]=1[F:13].C([NH2:16])=O>>[F:1][C:2]1[CH:3]=[C:4]2[C:5](=[CH:11][C:12]=1[F:13])[C:6](=[O:7])[NH:16][C:9]2=[O:8]Participants
3
Procedure
At 130° C., 1.0 g (5.4 mmol) of 4,5-difluorophthalic anhydride was stirred in 6 ml of formamide for 2 h. After cooling, the reaction mixture was then added to ice-cold water. The precipitated yellow solid was filtered off with suction, washed thoroughly with cold water and dried under high vacuum. This gave 744 mg of a white solid (74.8% of theory).
Workup
- temperatureAfter cooling
- additionthe reaction mixture was then added to ice-cold water
- filtrationThe precipitated yellow solid was filtered off with suction
- washwashed thoroughly with cold water
- customdried under high vacuum
Sources & evidence
- ORD record
- ord-202235d35c12483ab53dba07875fb838
- Source dataset
- uspto-grants-2015_03
- Patent number
- US08987256B2
Linked notes
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