Sulfuric Acid → Xanthone-2-carboxylic acid

HRID 726769Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 726769
[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-6d243c70383e49c49ce727479afd48a6
Quelldatensatz
uspto-grants-1998_01
Patentnummer
US05710198

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