2,3,5,6-Tetrafluoroterephthalic acid → 2,3,5,6-Tetrafluorobenzoic Acid

HRID 363219

Reaction equation

[F:1][C:2]1[C:10]([F:11])=[C:9](C(O)=O)[C:8]([F:15])=[C:7]([F:16])[C:3]=1[C:4]([OH:6])=[O:5]>O>[F:1][C:2]1[C:10]([F:11])=[CH:9][C:8]([F:15])=[C:7]([F:16])[C:3]=1[C:4]([OH:6])=[O:5]

Participants

Conditions

Temperature: 130 °C

Procedure

80 g of 80% strength by weight 2,3,5,6-tetrafluoroterephthalic acid (containing 8% by weight of sulfuric acid and 12% by weight of water) were mixed with 300 g of water in a 0.6 l enamelled autoclave and heated for 40 hours at 130° C. After cooling to 20° C. and depressurizing, the suspension then present was filtered, washed with 60 g of water and the white solid was dried. 42 g of 2,3,5,6-tetrafluorobenzoic acid having a content of 98% by weight and a melting point of 151° C. were obtained.

Workup

temperatureAfter cooling to 20° C.
filtrationthe suspension then present was filtered
washwashed with 60 g of water
customthe white solid was dried

Sources & evidence

ORD record: ord-0880ec92c1784433b8dda8cd82175cb3
Source dataset: uspto-grants-1999_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05872283

Linked notes

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