Sulfuric Acid → Xanthone-2-carboxylic acid

HRID 1456684Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1456684
[C:1]([C:4]1[CH:19]=[CH:18][C:7]([O:8][C:9]2[CH:17]=[CH:16][CH:15]=[CH:14][C:10]=2[C:11]([OH:13])=O)=[CH:6][CH:5]=1)([OH:3])=[O:2].S(=O)(=O)(O)O>O>[O:13]=[C:11]1[C:6]2[CH:5]=[C:4]([C:1]([OH:3])=[O:2])[CH:19]=[CH:18][C:7]=2[O:8][C:9]2[C:10]1=[CH:14][CH:15]=[CH:16][CH:17]=2

Komponenten

4

Edukt 2

HCID 1118Sulfuric AcidHCID 226650732-(4-Carboxyphenoxy)benzoic acid

Produkt 1

HCID 473472Xanthone-2-carboxylic acidAusbeute 87,6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

A mixture of 29.9 g (0.11 mol) of 2-(4-carboxyphenoxy)benzoic acid (Example 10e) and 250 ml of concentrated sulfuric acid is heated at 80° C. for one hour. The resulting solution is then poured onto about 2.5 litres of water and the mixture is stirred vigorously for 30 minutes. The product which has precipitated is filtered off, washed with water and dried under a high vacuum. 23.15 g (85%) of 9-oxo-9H-xanthene-2-carboxylic acid, melting point>280° C., result as a beige. powder.

Aufarbeitung

  1. customThe product which has precipitated
  2. filtrationis filtered off
  3. washwashed with water
  4. customdried under a high vacuum

Quellen und Nachweise

ORD-Eintrag
ord-00d4fca321b643d1b5a790d7179910a6
Quelldatensatz
uspto-grants-1998_12
Patentnummer
US05844024

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