Reaktion #54997

Reaktionsgleichung

4-hydroxybenzoic acid

acetyl chloride

→

4-acetoxy benzoic acid

Lösungsmittel

benzene

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeSolvent and excess acetyl chloride are evaporated
2. 2
   workup.DISSOLUTIONThe mixture is dissolved in methanol (150 ml.)
3. 3
   workup.ADDITIONwater (20 ml.) added
4. 4
   workup.ADDITIONaddition of more water

Vorschrift

A solution of 20 g. of 4-hydroxybenzoic acid in 200 ml. of benzene and 40 ml. of acetyl chloride is refluxed for 3 hours. Solvent and excess acetyl chloride are evaporated. The mixture is dissolved in methanol (150 ml.) and water (20 ml.) added; after 15 minutes, addition of more water results in the precipitation of 4-acetoxy benzoic acid, m.p. 192°-193° C.

Quelle