2,4-Dichlorobenzoic Acid → Tetrafluorophthalic anhydride

HRID 259950

Reaktionsgleichung

Reaktionsgleichung von HRID 259950
[F:1][C:2]1[C:10]([F:11])=[C:9]([F:12])[C:8]([F:13])=[C:4]([C:5](F)=[O:6])[C:3]=1[C:14](F)=[O:15].FC1(F)C2C(=C(F)C(F)=C(F)C=2F)C(=O)[O:19]1.ClC1C=C(Cl)C=CC=1C(O)=O>>[F:1][C:2]1[C:10]([F:11])=[C:9]([F:12])[C:8]([F:13])=[C:4]2[C:5](=[O:19])[O:6][C:14](=[O:15])[C:3]=12

Komponenten

4

Edukt 3

HCID 57872,4-Dichlorobenzoic AcidHCID 11032047Perfluoro-phthalideHCID 110756133,4,5,6-tetrafluorobenzene-1,2-dicarbonyl Fluoride

Produkt 1

HCID 69545Tetrafluorophthalic anhydrideAusbeute 62,5 %

Versuchsvorschrift

Into a 200 ml glass reactor equipped with a reflux condenser and a stirrer, 50 g (0.207 mol) of the mixture (1:1) of the 3,4,5,6-tetrafluorophthaloyldifluoride and the 3,3,4,5,6,7-hexafluoro-1-[3H]-isobenzofuranone of Example 2, and 79.0 g (0.414 mol) of 2,4-dichlorobenzoic acid were charged, and the mixture was reacted at 150° C. for 6 hours with vigorous stirring. Then, the reaction mixture was separated by distillation to obtain 28.5 g of tetrafluorophthalic anhydride. The yield was 62.5%.

Aufarbeitung

  1. customInto a 200 ml glass reactor equipped with a reflux condenser and a stirrer
  2. customthe mixture was reacted at 150° C. for 6 hours with vigorous stirring
  3. customThen, the reaction mixture was separated by distillation

Quellen und Nachweise

ORD-Eintrag
ord-3d64a7793eca424da12baf062dcb77b3
Quelldatensatz
uspto-grants-1996_06
Patentnummer
US05523476

Verknüpfte Notizen

Wird geladen…